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Unmounted Achromatic Doublets, AR Coated: 400 - 700 nm


  • Achromatic Performance with AR Coating for 400 - 700 nm
  • Multi-Element Design Minimizes Spot Size
  • Custom Achromatic Optic Available

AC508-180-A

(Ø2")

AC254-080-A

(Ø1")

AC127-050-A

(Ø1/2")

AC080-016-A

(8 mm)

AC060-010-A

(6 mm)

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General Specifications
Design Wavelengths  486.1 nm, 587.6 nm, and 656.3 nm
AR Coating Range  400 - 700 nm
Reflectance Over AR Coating
Range (0° AOI)
 Ravg < 0.5%
Diameters Available  Ø5 mm, Ø6 mm, Ø6.35 mm,
Ø8 mm, Ø1/2", Ø1", Ø30 mm, and Ø2"
Diameter Tolerance  +0.00/-0.10 mm
Focal Length Tolerance  ±1%
Surface Quality  40-20 Scratch-Dig
Spherical Surface Powera  3λ/2
Spherical Surface Irregularity
(Peak to Valley)
 λ/4
Centration  <3 arcmin
Clear Aperture  >90% of Diameter
Damage Thresholdb Pulse 0.5 J/cm2
(532 nm, 10 ns Pulse, 10 Hz, Ø0.566 mm)
CWc 600 W/cm
(532 nm, Ø0.020 mm)
Operating Temperature  -40 °C to 85 °C
  • Much like surface flatness for flat optics, spherical surface power is a measure of the deviation between the surface of the curved optic and a calibrated reference gauge, typically for a 633 nm source, unless otherwise stated. This specification is also commonly referred to as surface fit.
  • The damage threshold of cemented achromatic doublets is limited by the cement. For applications that require higher damage thresholds, please consider our air-spaced doublets.
  • The power density of your beam should be calculated in terms of W/cm. For an explanation of why the linear power density provides the best metric for long pulse and CW sources, please see the Damage Thresholds tab.
Achromatic Doublets Selection Guide
Unmounted Lenses Mounted Lenses
Visible (400 - 700 nm) AR Coating Visible (400 - 700 nm) AR Coating
Near IR (650 - 1050 nm) AR Coating Near IR (650 - 1050 nm) AR Coating
IR (1050 - 1700 nm) AR Coating IR (1050 - 1700 nm) AR Coating
Achromatic Doublet Kits
Optical Coatings Guide
Lens Tutorial
Zemax Files
Click on the red Document icon next to the item numbers below to access the Zemax file download. Our entire Zemax Catalog is also available.

Features

  • AR Coated for the 400 - 700 nm Range
  • Positive Doublet Sizes: Ø5 mm, Ø6 mm, Ø6.35 mm, Ø8 mm, Ø1/2", Ø1", Ø30 mm, and Ø2"
  • Negative Doublet Sizes: Ø1/2", Ø1", and Ø2"
  • 7.5 to 1000 mm Focal Lengths for Positive Doublets
  • -20 to -100 mm Focal Lengths for Negative Doublets
  • Custom Achromatic Optics Available

Thorlabs' cemented Achromatic Doublets are optimized to provide excellent performance in the visible region. Our design for the achromatic doublets uses the helium "d" line (587.6 nm, yellow) and the hydrogen "F" (486.1 nm, blue/green) and "C" (656.3 nm, red) lines since these wavelengths reasonably represent the visible spectrum and are used to define the Abbe Number, Vd, of a material.

Refer to the Application tab above for information about the superior performance of achromatic doublets compared to singlet lenses and the Measurement tab for examples of measurements that can be made by downloading the appropriate Zemax® file for the achromatic lens of interest. Zemax files can be found by clicking on the document icon next to the appropriate part number below.

For best performance, the side of the lens with the largest radius of curvature (flattest side) should face away from the collimated beam. When the engraved part number on the lens is oriented right side up, the flattest side of the lens is the bottom surface. Please see the diagram under the reference drawing link below for additional details.

Recommended lens mounts are given in the text under each table below. Alternatively, you can choose an appropriate mount from our entire selection of fixed diameter lens mounts, self-centering adjustable lens mounts, and adjustable lens mounts. When choosing a lens mount, make sure the mount can accommodate the diameter and edge thickness specifications of the lens. The Visible Achromatic Doublets featured on this page are also available in a mounted version. For applications in wavelength regimes <410 nm, Thorlabs’ air-gap UV doublets provide excellent performance down to 240 nm.

In the specification tables below, a positive radius of curvature indicates that the surface is opening to the right when the lens is oriented as shown in the reference drawing while a negative radius of curvature indicates that the surface is opening to the left. Both the positive and negative lenses have an infinite conjugate ratio (i.e., if a diverging light source is placed one focal length away from the flatter side of the lens, the light rays emerging from the curved side will be collimated).

Custom Achromatic Lenses
Thorlabs' optics business unit has a wide breadth of manufacturing capabilities that allow us to offer a variety of custom achromatic optics for both OEM sales and low quantity one-off orders. Achromatic optics with customer-defined sizes, focal lengths, substrate materials, cement materials, and coatings are all available as customs. In addition, we can offer optics that exceed the specifications of our stock catalog offerings. To receive more information or inquire about a custom order, please contact Tech Support.

Optic Cleaning Tutorial

Detailed information regarding each achromatic doublet can be found in the Zemax® files included with the support documents for each doublet. Below are some examples of the measurement that can be made using the Zemax® files.

Focal Shift vs. Wavelength

Thorlabs' achromatic doublets are optimized to provide a nearly constant focal length across a broad bandwidth. This is accomplished by utilizing a multi-element design to minimize the chromatic aberration of the lens. Dispersion in the first (positive) element of the doublet is corrected by the second (negative) element, resulting in better broadband performance than spherical singlets or aspheric lenses. The graph below shows the paraxial focal shift as a function of wavelength for the AC508-400-A, which is a 400 mm focal length, Ø50.8 mm visible achromatic doublet.

Wavefront Error and Spot Size

Spherical doublet lenses have been corrected for various aberrations. One way of displaying the theoretical level of correction is through plots of wavefront error and ray traces to determine spot size. For example, in Figure 2, a plot of wavefront at the image plane reveals information regarding aberration correction by using the AC254-125-C. In this example, the wavefront error is theoretically on the order of 3/100 of a wave. This indicates that the optical path length difference (OPD) is extremely small for arrays going through the center of the lens and at nearly full aperture.

A ray trace for spot size at the image plane of the AC254-250-C is shown below in Figure 3. In this near IR achromatic doublet, the design wavelengths (706.5 nm, 855 nm and 1015 nm) have each been traced through the lens and are represented by different colors. The circle surrounding the distribution of ray intercepts represents the diameter of the Airy disk. If the spot is within the Airy disk, the lens is typically considered to be diffraction limited. Since the spot size is drawn using geometric ray tracing, spots much smaller than the Airy disk are not achievable due to diffraction.

Understanding Modulation Transfer Function, MTF

MTF image quality is an important characteristic of lenses. A common way to measure this is by using contrast. A plot of the modulation transfer function is used as both a theoretical and experimental description of image quality. The MTF of a lens describes its ability to transfer contrast from an object to an image at various resolution levels. Typically, a resolution target made up of black and white lines at various spacings is imaged and contrast can be measured. Contrast at 100% would consist of perfectly black and white lines. As the contrast diminishes, the distinction between lines begins to blur. A plot of MTF shows the percentage of contrast as the spacing between these lines decreases. The spacing between the lines at the object is usually represented as spatial frequency given in cycles/mm.

Achromat MTF
Click to Enlarge

Figure 4

The chart shows the theoretical MTF for our Ø25.4 mm, f=200 mm near IR achromatic doublet. The contrast is around 83% at a spatial frequency of about 20 cycles/mm. This represents 83% contrast at 0.05 mm spacings between lines. Theoretical MTF shows how well a design can perform if the optic was built exactly to the design dimensions. In reality, most optics fall short of the theoretical due to manufacturing tolerances.

Achromatic Doublet Resolution
Achromatic Doublet Resolution

The screen captures to the right and left are actual measurements taken using a USAF 1951 resolution chart as the object.

For the target selected, the contrast measured 82.3%.

Achromatic Doublet Lenses have far superior optical performance to Singlet Lenses. In addition, they offer better broadband and off-axis performance than aspheric lenses. Whether your application has demanding imaging requirements or laser beam manipulation needs, these doublets should be considered.

Achieve a Tighter Focus

The figures below show a comparison of a plano-convex singlet focusing a 633 nm laser beam and an achromatic doublet focusing the same laser beam. The spot (circle of least confusion) from the doublet is 4.2 times smaller than the singlet spot size.

Achromatic Doublet Focus Spot Size

 

Superior Off Axis Performance

Achromatic doublet lenses have a much reduced sensitivity to centration on the beam axis when compared to spherical singlets and aspheric lenses.

The figures below show two 50.0 mm focal length lenses, one plano-convex and the other an achromatic doublet. Both are Ø25.4 mm lenses with a Ø3 mm beam through the optical axis and one offset by 8.0 mm. Lateral and transverse aberrations are greatly reduced by the achromatic doublet.

Achromatic Doublet Off-Axis Performance

 

Nearly Constant Focal Length Across a Wide Range of Wavelengths

When using a white light source with a singlet lens, the focal point and circle of least confusion are blurred by chromatic aberration. Chromatic aberration is due to the variation of refractive index with respect to wavelength. In an achromatic doublet this effect is somewhat compensated for by using glasses of two different refractive indexes to cancel these aberrations.

The figures below show the effect on focal length for a number of different wavelengths of light through an achromatic doublet and a plano-convex singlet. The figures also shows how the circle of least confusion for white light is reduced by using an achromatic doublet.

Achromatic Doublet Chromatic Performance
Damage Threshold Specifications
Coating Designation
(Item # Suffix)
Damage Threshold
-A (Pulsed) 0.5 J/cm2 (532 nm, 10 ns Pulse, 10 Hz, Ø0.566 mm)
-A (CW)a 600 W/cm (532 nm, Ø0.020 mm)
  • The power density of your beam should be calculated in terms of W/cm. For an explanation of why the linear power density provides the best metric for long pulse and CW sources, please see the "Continuous Wave and Long-Pulse Lasers" section below.

Damage Threshold Data for Thorlabs' A-Coated Achromatic Doublets

The specifications to the right are measured data for Thorlabs' A-coated achromatic doublets. Damage threshold specifications are constant for all A-coated achromatic doublets, regardless of the size or focal length of the lens.

 

Laser Induced Damage Threshold Tutorial

The following is a general overview of how laser induced damage thresholds are measured and how the values may be utilized in determining the appropriateness of an optic for a given application. When choosing optics, it is important to understand the Laser Induced Damage Threshold (LIDT) of the optics being used. The LIDT for an optic greatly depends on the type of laser you are using. Continuous wave (CW) lasers typically cause damage from thermal effects (absorption either in the coating or in the substrate). Pulsed lasers, on the other hand, often strip electrons from the lattice structure of an optic before causing thermal damage. Note that the guideline presented here assumes room temperature operation and optics in new condition (i.e., within scratch-dig spec, surface free of contamination, etc.). Because dust or other particles on the surface of an optic can cause damage at lower thresholds, we recommend keeping surfaces clean and free of debris. For more information on cleaning optics, please see our Optics Cleaning tutorial.

Testing Method

Thorlabs' LIDT testing is done in compliance with ISO/DIS11254 specifications. A standard 1-on-1 testing regime is performed to test the damage threshold.

First, a low-power/energy beam is directed to the optic under test. The optic is exposed in 10 locations to this laser beam for a set duration of time (CW) or number of pulses (pulse repetition frequency specified). After exposure, the optic is examined by a microscope (~100X magnification) for any visible damage. The number of locations that are damaged at a particular power/energy level is recorded. Next, the power/energy is either increased or decreased and the optic is exposed at 10 new locations. This process is repeated until damage is observed. The damage threshold is then assigned to be the highest power/energy that the optic can withstand without causing damage. A histogram such as that below represents the testing of one BB1-E02 mirror.

LIDT metallic mirror
The photograph above is a protected aluminum-coated mirror after LIDT testing. In this particular test, it handled 0.43 J/cm2 (1064 nm, 10 ns pulse, 10 Hz, Ø1.000 mm) before damage.
LIDT BB1-E02
Example Test Data
Fluence# of Tested LocationsLocations with DamageLocations Without Damage
1.50 J/cm2 10 0 10
1.75 J/cm2 10 0 10
2.00 J/cm2 10 0 10
2.25 J/cm2 10 1 9
3.00 J/cm2 10 1 9
5.00 J/cm2 10 9 1

According to the test, the damage threshold of the mirror was 2.00 J/cm2 (532 nm, 10 ns pulse, 10 Hz, Ø0.803 mm). Please keep in mind that these tests are performed on clean optics, as dirt and contamination can significantly lower the damage threshold of a component. While the test results are only representative of one coating run, Thorlabs specifies damage threshold values that account for coating variances.

Continuous Wave and Long-Pulse Lasers

When an optic is damaged by a continuous wave (CW) laser, it is usually due to the melting of the surface as a result of absorbing the laser's energy or damage to the optical coating (antireflection) [1]. Pulsed lasers with pulse lengths longer than 1 µs can be treated as CW lasers for LIDT discussions. Additionally, when pulse lengths are between 1 ns and 1 µs, LIDT can occur either because of absorption or a dielectric breakdown (must check both CW and pulsed LIDT). Absorption is either due to an intrinsic property of the optic or due to surface irregularities; thus LIDT values are only valid for optics meeting or exceeding the surface quality specifications given by a manufacturer. While many optics can handle high power CW lasers, cemented (e.g., achromatic doublets) or highly absorptive (e.g., ND filters) optics tend to have lower CW damage thresholds. These lower thresholds are due to absorption or scattering in the cement or metal coating.

Linear Power Density Scaling

LIDT in linear power density vs. pulse length and spot size. For long pulses to CW, linear power density becomes a constant with spot size. This graph was obtained from [1].

Intensity Distribution

Pulsed lasers with high pulse repetition frequencies (PRF) may behave similarly to CW beams. Unfortunately, this is highly dependent on factors such as absorption and thermal diffusivity, so there is no reliable method for determining when a high PRF laser will damage an optic due to thermal effects. For beams with a large PRF both the average and peak powers must be compared to the equivalent CW power. Additionally, for highly transparent materials, there is little to no drop in the LIDT with increasing PRF.

In order to use the specified CW damage threshold of an optic, it is necessary to know the following:

  1. Wavelength of your laser
  2. Linear power density of your beam (total power divided by 1/e2 spot size)
  3. Beam diameter of your beam (1/e2)
  4. Approximate intensity profile of your beam (e.g., Gaussian)

The power density of your beam should be calculated in terms of W/cm. The graph to the right shows why the linear power density provides the best metric for long pulse and CW sources. Under these conditions, linear power density scales independently of spot size; one does not need to compute an adjusted LIDT to adjust for changes in spot size. This calculation assumes a uniform beam intensity profile. You must now consider hotspots in the beam or other nonuniform intensity profiles and roughly calculate a maximum power density. For reference, a Gaussian beam typically has a maximum power density that is twice that of the uniform beam (see lower right).

Now compare the maximum power density to that which is specified as the LIDT for the optic. If the optic was tested at a wavelength other than your operating wavelength, the damage threshold must be scaled appropriately. A good rule of thumb is that the damage threshold has a linear relationship with wavelength such that as you move to shorter wavelengths, the damage threshold decreases (i.e., a LIDT of 10 W/cm at 1310 nm scales to 5 W/cm at 655 nm):

CW Wavelength Scaling

While this rule of thumb provides a general trend, it is not a quantitative analysis of LIDT vs wavelength. In CW applications, for instance, damage scales more strongly with absorption in the coating and substrate, which does not necessarily scale well with wavelength. While the above procedure provides a good rule of thumb for LIDT values, please contact Tech Support if your wavelength is different from the specified LIDT wavelength. If your power density is less than the adjusted LIDT of the optic, then the optic should work for your application. 

Please note that we have a buffer built in between the specified damage thresholds online and the tests which we have done, which accommodates variation between batches. Upon request, we can provide individual test information and a testing certificate. The damage analysis will be carried out on a similar optic (customer's optic will not be damaged). Testing may result in additional costs or lead times. Contact Tech Support for more information.

Pulsed Lasers

As previously stated, pulsed lasers typically induce a different type of damage to the optic than CW lasers. Pulsed lasers often do not heat the optic enough to damage it; instead, pulsed lasers produce strong electric fields capable of inducing dielectric breakdown in the material. Unfortunately, it can be very difficult to compare the LIDT specification of an optic to your laser. There are multiple regimes in which a pulsed laser can damage an optic and this is based on the laser's pulse length. The highlighted columns in the table below outline the relevant pulse lengths for our specified LIDT values.

Pulses shorter than 10-9 s cannot be compared to our specified LIDT values with much reliability. In this ultra-short-pulse regime various mechanics, such as multiphoton-avalanche ionization, take over as the predominate damage mechanism [2]. In contrast, pulses between 10-7 s and 10-4 s may cause damage to an optic either because of dielectric breakdown or thermal effects. This means that both CW and pulsed damage thresholds must be compared to the laser beam to determine whether the optic is suitable for your application.

Pulse Duration t < 10-9 s 10-9 < t < 10-7 s 10-7 < t < 10-4 s t > 10-4 s
Damage Mechanism Avalanche Ionization Dielectric Breakdown Dielectric Breakdown or Thermal Thermal
Relevant Damage Specification N/A Pulsed Pulsed and CW CW

When comparing an LIDT specified for a pulsed laser to your laser, it is essential to know the following:

Energy Density Scaling

LIDT in energy density vs. pulse length and spot size. For short pulses, energy density becomes a constant with spot size. This graph was obtained from [1].

  1. Wavelength of your laser
  2. Energy density of your beam (total energy divided by 1/e2 area)
  3. Pulse length of your laser
  4. Pulse repetition frequency (prf) of your laser
  5. Beam diameter of your laser (1/e2 )
  6. Approximate intensity profile of your beam (e.g., Gaussian)

The energy density of your beam should be calculated in terms of J/cm2. The graph to the right shows why the energy density provides the best metric for short pulse sources. Under these conditions, energy density scales independently of spot size, one does not need to compute an adjusted LIDT to adjust for changes in spot size. This calculation assumes a uniform beam intensity profile. You must now adjust this energy density to account for hotspots or other nonuniform intensity profiles and roughly calculate a maximum energy density. For reference a Gaussian beam typically has a maximum energy density that is twice that of the 1/e2 beam.

Now compare the maximum energy density to that which is specified as the LIDT for the optic. If the optic was tested at a wavelength other than your operating wavelength, the damage threshold must be scaled appropriately [3]. A good rule of thumb is that the damage threshold has an inverse square root relationship with wavelength such that as you move to shorter wavelengths, the damage threshold decreases (i.e., a LIDT of 1 J/cm2 at 1064 nm scales to 0.7 J/cm2 at 532 nm):

Pulse Wavelength Scaling

You now have a wavelength-adjusted energy density, which you will use in the following step.

Beam diameter is also important to know when comparing damage thresholds. While the LIDT, when expressed in units of J/cm², scales independently of spot size; large beam sizes are more likely to illuminate a larger number of defects which can lead to greater variances in the LIDT [4]. For data presented here, a <1 mm beam size was used to measure the LIDT. For beams sizes greater than 5 mm, the LIDT (J/cm2) will not scale independently of beam diameter due to the larger size beam exposing more defects.

The pulse length must now be compensated for. The longer the pulse duration, the more energy the optic can handle. For pulse widths between 1 - 100 ns, an approximation is as follows:

Pulse Length Scaling

Use this formula to calculate the Adjusted LIDT for an optic based on your pulse length. If your maximum energy density is less than this adjusted LIDT maximum energy density, then the optic should be suitable for your application. Keep in mind that this calculation is only used for pulses between 10-9 s and 10-7 s. For pulses between 10-7 s and 10-4 s, the CW LIDT must also be checked before deeming the optic appropriate for your application.

Please note that we have a buffer built in between the specified damage thresholds online and the tests which we have done, which accommodates variation between batches. Upon request, we can provide individual test information and a testing certificate. Contact Tech Support for more information.


[1] R. M. Wood, Optics and Laser Tech. 29, 517 (1997).
[2] Roger M. Wood, Laser-Induced Damage of Optical Materials (Institute of Physics Publishing, Philadelphia, PA, 2003).
[3] C. W. Carr et al., Phys. Rev. Lett. 91, 127402 (2003).
[4] N. Bloembergen, Appl. Opt. 12, 661 (1973).

In order to illustrate the process of determining whether a given laser system will damage an optic, a number of example calculations of laser induced damage threshold are given below. For assistance with performing similar calculations, we provide a spreadsheet calculator that can be downloaded by clicking the button to the right. To use the calculator, enter the specified LIDT value of the optic under consideration and the relevant parameters of your laser system in the green boxes. The spreadsheet will then calculate a linear power density for CW and pulsed systems, as well as an energy density value for pulsed systems. These values are used to calculate adjusted, scaled LIDT values for the optics based on accepted scaling laws. This calculator assumes a Gaussian beam profile, so a correction factor must be introduced for other beam shapes (uniform, etc.). The LIDT scaling laws are determined from empirical relationships; their accuracy is not guaranteed. Remember that absorption by optics or coatings can significantly reduce LIDT in some spectral regions. These LIDT values are not valid for ultrashort pulses less than one nanosecond in duration.

Intensity Distribution
A Gaussian beam profile has about twice the maximum intensity of a uniform beam profile.

CW Laser Example
Suppose that a CW laser system at 1319 nm produces a 0.5 W Gaussian beam that has a 1/e2 diameter of 10 mm. A naive calculation of the average linear power density of this beam would yield a value of 0.5 W/cm, given by the total power divided by the beam diameter:

CW Wavelength Scaling

However, the maximum power density of a Gaussian beam is about twice the maximum power density of a uniform beam, as shown in the graph to the right. Therefore, a more accurate determination of the maximum linear power density of the system is 1 W/cm.

An AC127-030-C achromatic doublet lens has a specified CW LIDT of 350 W/cm, as tested at 1550 nm. CW damage threshold values typically scale directly with the wavelength of the laser source, so this yields an adjusted LIDT value:

CW Wavelength Scaling

The adjusted LIDT value of 350 W/cm x (1319 nm / 1550 nm) = 298 W/cm is significantly higher than the calculated maximum linear power density of the laser system, so it would be safe to use this doublet lens for this application.

Pulsed Nanosecond Laser Example: Scaling for Different Pulse Durations
Suppose that a pulsed Nd:YAG laser system is frequency tripled to produce a 10 Hz output, consisting of 2 ns output pulses at 355 nm, each with 1 J of energy, in a Gaussian beam with a 1.9 cm beam diameter (1/e2). The average energy density of each pulse is found by dividing the pulse energy by the beam area:

Pulse Energy Density

As described above, the maximum energy density of a Gaussian beam is about twice the average energy density. So, the maximum energy density of this beam is ~0.7 J/cm2.

The energy density of the beam can be compared to the LIDT values of 1 J/cm2 and 3.5 J/cm2 for a BB1-E01 broadband dielectric mirror and an NB1-K08 Nd:YAG laser line mirror, respectively. Both of these LIDT values, while measured at 355 nm, were determined with a 10 ns pulsed laser at 10 Hz. Therefore, an adjustment must be applied for the shorter pulse duration of the system under consideration. As described on the previous tab, LIDT values in the nanosecond pulse regime scale with the square root of the laser pulse duration:

Pulse Length Scaling

This adjustment factor results in LIDT values of 0.45 J/cm2 for the BB1-E01 broadband mirror and 1.6 J/cm2 for the Nd:YAG laser line mirror, which are to be compared with the 0.7 J/cm2 maximum energy density of the beam. While the broadband mirror would likely be damaged by the laser, the more specialized laser line mirror is appropriate for use with this system.

Pulsed Nanosecond Laser Example: Scaling for Different Wavelengths
Suppose that a pulsed laser system emits 10 ns pulses at 2.5 Hz, each with 100 mJ of energy at 1064 nm in a 16 mm diameter beam (1/e2) that must be attenuated with a neutral density filter. For a Gaussian output, these specifications result in a maximum energy density of 0.1 J/cm2. The damage threshold of an NDUV10A Ø25 mm, OD 1.0, reflective neutral density filter is 0.05 J/cm2 for 10 ns pulses at 355 nm, while the damage threshold of the similar NE10A absorptive filter is 10 J/cm2 for 10 ns pulses at 532 nm. As described on the previous tab, the LIDT value of an optic scales with the square root of the wavelength in the nanosecond pulse regime:

Pulse Wavelength Scaling

This scaling gives adjusted LIDT values of 0.08 J/cm2 for the reflective filter and 14 J/cm2 for the absorptive filter. In this case, the absorptive filter is the best choice in order to avoid optical damage.

Pulsed Microsecond Laser Example
Consider a laser system that produces 1 µs pulses, each containing 150 µJ of energy at a repetition rate of 50 kHz, resulting in a relatively high duty cycle of 5%. This system falls somewhere between the regimes of CW and pulsed laser induced damage, and could potentially damage an optic by mechanisms associated with either regime. As a result, both CW and pulsed LIDT values must be compared to the properties of the laser system to ensure safe operation.

If this relatively long-pulse laser emits a Gaussian 12.7 mm diameter beam (1/e2) at 980 nm, then the resulting output has a linear power density of 5.9 W/cm and an energy density of 1.2 x 10-4 J/cm2 per pulse. This can be compared to the LIDT values for a WPQ10E-980 polymer zero-order quarter-wave plate, which are 5 W/cm for CW radiation at 810 nm and 5 J/cm2 for a 10 ns pulse at 810 nm. As before, the CW LIDT of the optic scales linearly with the laser wavelength, resulting in an adjusted CW value of 6 W/cm at 980 nm. On the other hand, the pulsed LIDT scales with the square root of the laser wavelength and the square root of the pulse duration, resulting in an adjusted value of 55 J/cm2 for a 1 µs pulse at 980 nm. The pulsed LIDT of the optic is significantly greater than the energy density of the laser pulse, so individual pulses will not damage the wave plate. However, the large average linear power density of the laser system may cause thermal damage to the optic, much like a high-power CW beam.


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Posted Comments:
Poster:besembeson
Posted Date:2016-04-05 08:50:29.0
Response from Bweh at Thorlabs USA: Yes we can offer this as a special item. I will contact you.
Poster:bo.jing
Posted Date:2016-04-01 16:57:32.013
Would it be possible for you to offer a 1/2", 100mm lens with A coating? I.e. AC127-100-A Regards
Poster:besembeson
Posted Date:2015-09-21 09:10:41.0
Response from Bweh at Thorlabs USA: Thanks for the feedback. We will review this and I will follow up with you with the values for the lenses that are of interest to you.
Poster:MichaelSchwertner
Posted Date:2015-06-09 09:35:48.663
Dear Thorlabs, for the Achromats you list the the back focal length on axis. For integration and using CAD, however, it is often useful to also have the BFL value on the edge of the lens. This can be calculated from the BFL on axis and R3 but it would be nice to have this on-edge value of the BFL also in the table. Could you list it please? It would make your website even better. Thank you and greetings, Michael
Poster:jlow
Posted Date:2014-11-25 11:19:04.0
Response from Jeremy at Thorlabs: The reflectivity is per surface.
Poster:christiaanhulleman
Posted Date:2014-11-24 17:16:26.52
Is the reflectivity data of the AR coating per lens or per surface? So these lenses would have 2 surfaces each.
Poster:jlow
Posted Date:2014-02-27 02:45:43.0
Response from Jeremy at Thorlabs: We recommend using the .zar files which are a pack and go Zemax zip file which contain both the coating and the lens data. If you cannot use the .zar file format, a simple solution would be to remove the coating from the lens.
Poster:1039805428
Posted Date:2014-02-23 15:18:09.86
My fellow bought a lens "AC254-030-A". When I opened the ZEMAX file, it shown 'COATINGTHRO.DAT can't open'. I searched the Zemax install location, I had no this file. Could you send it for me? Thanks very much!
Poster:basili
Posted Date:2013-10-31 12:14:23.637
It has been shown, in the application page, the spot diameter is 3.6µm for achromatic Doublet and 15µm for Plano-Convex spherical singlet. Both results obtained at 633nm wavelength, φ10mm input beam and 50.0mm focal length. I would like to know formula used in those calculations.
Poster:jlow
Posted Date:2013-10-31 03:49:05.0
Response from Jeremy at Thorlabs: The results were obtained using Zemax simulation software.
Poster:james.parker
Posted Date:2013-02-07 06:29:34.31
Are you able to provide a CW laser damage threshold for these lenses please?
Poster:tcohen
Posted Date:2012-09-27 09:36:00.0
Response from Tim at Thorlabs: We have provided .zar files on the website to allow more information to the user. For users with incompatible versions of Zemax we can provide both individual files and the complete catalog in .zmx format. I will contact you directly to provide this.
Poster:carlos.macias
Posted Date:2012-09-25 15:42:58.0
Hi, cant manage to open the *.zar file in my version of zemax. Is there any link to *.zmx files? Many thanks
Poster:tcohen
Posted Date:2012-09-18 15:44:00.0
Response from Tim at Thorlabs: These are spherical achromats. Currently we offer air spaced achromats at http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=6083 which have superior performance to cemented versions (see the “Lens Comparison” tab for this data). Furthermore, we are currently working on introducing many new optics which include precision aspherized achromatic lenses. Please contact us at techsupport@thorlabs.com if you would like updates in the process.
Poster:paul.lauria
Posted Date:2012-09-14 20:38:47.0
Wondering if these are aspherized as well? Edmund and Newport both have aspherized achromatic doublets, does Thorlabs? Haven't found them if so.
Poster:regis.sarcia
Posted Date:2012-07-27 08:07:37.0
Hi, we already use this lens in one of our products and are pretty happy about it. I have to modify the system to measure under 400nm, could you please give me a graph of transmission of the lens between 320nm and 450nm? (no reflection graph please but really the transmission taking into account the absorbance of the lens materials) thank you in advance Régis
Poster:bdada
Posted Date:2012-01-12 21:14:00.0
Response from Buki at Thorlabs: You can use solvents like acetone or iso propyl alcohol. Please refer to our optics cleaning guide linked below for more information and contact TechSupport@thorlabs.com if you have any questions. http://www.thorlabs.com/tutorials.cfm?tabID=26066
Poster:luyang
Posted Date:2012-01-12 17:44:42.0
Can you please let me know how can I clean 1050-1620 achromatic doublet lens with C coating. I found a few finger prints on the lens and I'm afraid of scratch the coating using lens paper. Also can I use solvent to clean without destroying the coating? Thanks, Yang
Poster:bdada
Posted Date:2011-11-09 10:58:00.0
Response from Buki at Thorlabs: Thank you for participating in our Feedback Forum. The right material is N-BAF10/N-SF6HT, not N-BAFN10 and N-SFL6HT. We have corrected this typographical error on our website. Our current doublets are cemented together but we plan to release air spaced achromatic doublets soon, which will not require epoxy. Please contact TechSupport@thorlabs.com if you have further questions.
Poster:murray.davies
Posted Date:2011-11-07 17:04:44.0
Can you tell me if the index data your N-BAFN10 and N-SFL6HT is the same as for N-BAF10/N-SF6HT? Do you make the AC050-008-A1 without using glue? I am doing single photon counting and I am concerned with fluorescence in the glue.
Poster:jjurado
Posted Date:2011-04-06 16:05:00.0
Response from Javier at Thorlabs to marco.malinverni: Thank you very much for contacting us. The materials used in this lens are N-BAF10 and SF10, which are highly absorptive below the ~380 nm range. For example, a 10 mm sample of N-BAF10 glass has an internal transmittance of only 17% at 350 nm, and a 10 mm sample of SF10 has a transmittance value of 5.8% at 365 nm. The loss is then mostly attributed to absorption. I will contact you directly for further assistance.
Poster:marco.malinverni
Posted Date:2011-04-06 17:57:49.0
How is the absorption of this lens (AC508-100-A1) for wavelengths in the range of 250-300nm? And the focal shift. Thanks.
Poster:jjurado
Posted Date:2011-02-08 17:11:00.0
Response from Javier at Thorlabs to bmangum: Thank you very much for contacting us with your request. Although we have not characterized any possible fluorescence effects arising from our achromatic doublets, you are correct in assessing that this behavior is most likely due to the cement used. We are currently working on a new line of air-spaced achromatic doublets which would do away with any fluorescence effects; however, they will not be available for another 4-5 months. I will ocntact you directly to discuss your application a bit further.
Poster:bmangum
Posted Date:2011-02-07 19:55:52.0
I am using several focal lengths of these achromats of these lenses with the A coating. I am exciting with several tens of mW of 405 CW laser. I get strong fluorescence coming from the lens. I tested with some other A coated lenses I have and it must be coming from the cement. Have you characterized this before? I really need achromatic lenses for my fluorescence application - but then I am always stuck with the cement issue. Any advice on other products that might work?
Poster:Thorlabs
Posted Date:2010-12-06 10:23:32.0
Response from Javier at Thorlabs to hs49: the main tolerance specifications for all of our achromatic lenses are specified on the technical drawing (in pdf format), available under the documents icon ("D) next to each lens part number. For further information, please contact techsupport@thorlabs.com.
Poster:hs49
Posted Date:2010-12-03 11:01:07.0
Are there manufacturing tolerance values available for these achromats in terms of surface decenters, tilts, etc.? I need to model their performance in ZEMAX.
Poster:Thorlabs
Posted Date:2010-11-08 09:26:30.0
Response from Javier at Thorlabs to Ruelas: We tested some of the links, and they are working properly. I will send you the zmx file for the AC254-250-A shortly.
Poster:ruelas
Posted Date:2010-11-05 17:17:37.0
I am trying to obtain the zemax files for 2"OD f=25 cm and 2" OD f=15cm visible achromats. It seems that all the zemax links are broken.
Poster:Thorlabs
Posted Date:2010-09-17 11:21:00.0
Response from Javier at Thorlabs to carollo: The damage threshold values we have tested for our achromatic doublet lenses are as follows: -A coated lenses: 0.5 J/cm^2 (tested at 532nm, 10 ns pulse witdh, 10 Hz rep. rate) -B coated lenses: 5.0 J/cm^2 (tested at 810 nm, 10 ns pulse witdh, 10 Hz rep. rate) -C coated lenses: 5.0 J/cm^2 (tested at 1542 nm, 10 ns pulse witdh, 10 Hz rep. rate)
Poster:carollo
Posted Date:2010-09-16 17:23:22.0
Hi, I am interested in using an achromatic lens in a pulsed laser application. Could you please list or send me the specs for the optical damage threshold of the cemented lens? Thanks, Ryan
Poster:Javier
Posted Date:2010-06-07 21:37:18.0
Response from Javier at Thorlabs to guille2306: We can certainly offer uncoated versions of our MgF2 lenses. We will contact you with details regarding a quotation for these mirrors, reflectivity curves, and we would also be interested in knowing more about your application.
Poster:guille2306
Posted Date:2010-06-07 11:54:15.0
Are there uncoated or MgF2 coated versions of this lenses? If yes, do you have reflectivity curves in the 400-1000nm region?
Poster:jens
Posted Date:2010-03-29 13:40:57.0
A reply from Jens at Thorlabs to guille2306: we have calculated the reflectivity curve for the visible coating over an extended range. It turns out that the reflectivity will increase to a value of about 8% at 1000nm. I will send you the curve together with data on focal shift information over this range. As initial information the focal lenght will increase by 0.54mm at 1000nm for the AC508-075-A.
Poster:guille2306
Posted Date:2010-03-26 17:22:28.0
Hi, I would like to use a single achromatic doublet for the 450-950nm range. Which would be the typical reflectivity of the visible anti-reflection coating in the near infrared (700-1000nm)? And conversely, which would be the typical reflectivity of the near-IR coating in the visible range?
Poster:jens
Posted Date:2009-06-19 09:06:42.0
A reply from Jens at Thorlabs: the zemax files can be found under the Documents and Drawings Tab by selecting the corresponding file from column called MFG Spec
Poster:jnchacon
Posted Date:2009-06-18 19:28:58.0
Hi, Im working in the design of a spectrograph and i was thinking to use one of this doublets. I need the Zemax files in order to evaluate the image quality of the system. Can you tell me where are the zemax file? Thank. Juan Chacón (from Chile)
Poster:technicalmarketing
Posted Date:2008-01-21 10:12:09.0
As requested, a column has been added to the table in the "Specs" tab that lists a recommended mounting option for each lens. When choosing a lens mount be careful to match the lens diameter and edge thickness specifications to the lens mount. Thank you for the presentation feedback.
Poster:acable
Posted Date:2008-01-18 07:20:14.0
Can you add a link from the Specs Tab to the recommended compatible mount within the large table.
Poster:technicalmarketing
Posted Date:2008-01-10 14:14:29.0
At this time, our achromatic doublets are not RoHS compliant, and therefore, the type of glass used is SF5 (not N-SF5) and BAFN10 (not N-BAF10).
Poster:yinnon.glickman
Posted Date:2008-01-09 04:57:04.0
Hello Im interested in achromatic doubles. I would like to know the precise type of glass (by Schott catalog) which you refer to as SF5 (is it SF5 or N-SF5?) and BAFN10 (is it N-BAF10?). Ragards Yinnon Glickman

Ø5 mm Unmounted Positive Achromatic Doublets, AR Coated: 400 - 700 nm

Item #Diameter
(mm)
f a
(mm)
fba
(mm)
GraphsbR1a
(mm)
R2a
(mm)
R3a
(mm)
tc1
(mm)
tc2
(mm)
te
(mm)
MaterialsReference
Drawing
AC050-008-A 5.0 7.5 5.2 info 5.3 -3.9 -17.1 2.8 1.7 3.7 N-BAF10/N-SF6HT Achromatic Doublet Lens Drawing
AC050-010-A 5.0 10.0 7.9 info 6.6 -4.3 -15.4 2.5 1.9 3.7 N-BAK4/SF5
AC050-015-A 5.0 15.0 13.6 info 12.5 -5.3 -12.1 2.7 2.1 4.3 N-BK7/SF2
  • Positive values are measured from the right side of the lens as shown in the reference drawing. Negative values are measured from the left side of the lens.
  • Click on More Info Icon for plots and downloadable data of the focal length shift and transmission for the lens.

Suggested Fixed Lens Mounts: LMRA5 with an LMR05

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
AC050-008-A Support Documentation
AC050-008-Af=7.5 mm, Ø5 mm Achromatic Doublet, ARC: 400-700 nm
$43.80
Today
AC050-010-A Support Documentation
AC050-010-Af=10.0 mm, Ø5 mm Achromatic Doublet, ARC: 400-700 nm
$43.30
Today
AC050-015-A Support Documentation
AC050-015-Af=15.0 mm, Ø5 mm Achromatic Doublet, ARC: 400-700 nm
$43.30
Today

Ø6 mm Unmounted Positive Achromatic Doublets, AR Coated: 400 - 700 nm

Item #Diameter
(mm)
f a
(mm)
fba
(mm)
GraphsbR1a
(mm)
R2a
(mm)
R3a
(mm)
tc1
(mm)
tc2
(mm)
te
(mm)
MaterialsReference
Drawing
AC060-010-A 6.0 10.0 7.9 info 6.2 -4.6 -19.6 2.5 1.5 3.0 N-BAK4/SF5 Achromatic Doublet Lens Drawing
  • Positive values are measured from the right side of the lens as shown in the reference drawing. Negative values are measured from the left side of the lens.
  • Click on More Info Icon for plots and downloadable data of the focal length shift and transmission for the lens.

Suggested Fixed Lens Mounts: LMRA6 with an LMR05

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
AC060-010-A Support Documentation
AC060-010-Af=10.0 mm, Ø6 mm Achromatic Doublet, ARC: 400-700 nm
$44.00
Today

Ø6.35 mm Unmounted Positive Achromatic Doublets, AR Coated: 400 - 700 nm

Item #Diameter
(mm)
f a
(mm)
fba
(mm)
GraphsbR1a
(mm)
R2a
(mm)
R3a
(mm)
tc1
(mm)
tc2
(mm)
te
(mm)
MaterialsReference
Drawing
AC064-013-A 6.35 12.7 10.3 info 7.1 -5.9 -40.4 2.5 1.5 3.1 N-BAK4/SF5 Achromatic Doublet Lens Drawing
AC064-015-A 6.35 15.0 13.0 info 8.8 -6.6 -21.7 2.5 1.5 3.2 N-BK7/SF2
  • Positive values are measured from the right side of the lens as shown in the reference drawing. Negative values are measured from the left side of the lens.
  • Click on More Info Icon for plots and downloadable data of the focal length shift and transmission for the lens.

Suggested Fixed Lens Mounts: LMRA6.35 with an LMR05

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
AC064-013-A Support Documentation
AC064-013-Af=12.7 mm, Ø6.35 mm Achromatic Doublet, ARC: 400-700 nm
$43.80
Today
AC064-015-A Support Documentation
AC064-015-Af=15.0 mm, Ø6.35 mm Achromatic Doublet, ARC: 400-700 nm
$43.80
Today

Ø8.0 mm Unmounted Positive Achromatic Doublets, AR Coated: 400 - 700 nm

Item #Diameter
(mm)
f a
(mm)
fba
(mm)
GraphsbR1a
(mm)
R2a
(mm)
R3a
(mm)
tc1
(mm)
tc2
(mm)
te
(mm)
MaterialsReference
Drawing
AC080-010-A 8.0 10.0 6.7 info 7.1 -5.3 -22.7 4.5 2.0 4.9 N-BAF10/N-SF6HT Achromatic Doublet Lens Drawing
AC080-016-A 8.0 16.0 13.9 info 11.0 -9.2 -46.8 2.5 1.5 3.1 N-BAF10/N-SF6HT
AC080-020-A 8.0 20.0 17.8 info 11.1 -9.2 -34.8 2.5 1.5 3.0 N-BK7/SF2
  • Positive values are measured from the right side of the lens as shown in the reference drawing. Negative values are measured from the left side of the lens.
  • Click on More Info Icon for plots and downloadable data of the focal length shift and transmission for the lens.

Suggested Fixed Lens Mounts: LMRA8 with an LMR05

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
AC080-010-A Support Documentation
AC080-010-Af=10.0 mm, Ø8 mm Achromatic Doublet, ARC: 400-700 nm
$45.10
Today
AC080-016-A Support Documentation
AC080-016-Af=16.0 mm, Ø8 mm Achromatic Doublet, ARC: 400-700 nm
$44.80
Today
AC080-020-A Support Documentation
AC080-020-Af=20.0 mm, Ø8 mm Achromatic Doublet, ARC: 400-700 nm
$44.30
Today

Ø1/2" (Ø12.7 mm) Unmounted Positive and Negative Achromatic Doublets, ARC: 400 - 700 nm

Item #Diameter
(mm)
f a
(mm)
fba
(mm)
GraphsbR1a
(mm)
R2a
(mm)
R3a
(mm)
tc1
(mm)
tc2
(mm)
te
(mm)
MaterialsReference
Drawing
ACN127-050-Ac 12.7 -50.0 -52.3 info -25.6 25.6 372.7 1.5 2.2 4.6 N-BAK4/SF5 Achromatic Doublet Lens Drawing
ACN127-030-Ac 12.7 -30.0 -32.2 info -16.2 16.5 154.2 1.5 2.3 5.2 N-BAK4/SF5
ACN127-025-Ad 12.7 -25.0 -27.0 info -16.9 16.5 97.7 1.5 2.5 5.4 N-BAF10/N-SF6HT
ACN127-020-Ae 12.7 -20.0 -22.3 info -13.5 14.3 87.9 1.5 3.0 6.3 N-BAF10/N-SF6HT
AC127-019-Ac 12.7 19.0 15.7 info 12.9 -11.0 -59.3 4.5 1.5 4.0 N-BAF10/N-SF6HT Achromatic Doublet Lens Drawing
AC127-025-Ad 12.7 25.0 21.5 info 18.8 -10.6 -68.1 5.0 2.0 5.6 N-BAF10/SF10
AC127-030-Ac 12.7 30.0 27.5 info 17.9 -13.5 -44.2 3.5 1.5 3.4 N-BK7/SF2
AC127-050-Ac 12.7 50.0 47.2 info 27.4 -22.5 -91.8 3.5 1.5 4.0 N-BK7/SF2
AC127-075-Ac 12.7 75.0 72.9 info 41.3 -34.0 -137.1 2.5 1.5 3.4 N-BK7/SF2
  • Positive values are measured from the right side of the lens as shown in the reference drawing. Negative values are measured from the left side of the lens.
  • Click on More Info Icon for plots and downloadable data of the focal length shift and transmission for the lens.
  • Suggested Fixed Lens Mount: LMR05
  • Suggested Fixed Lens Mounts: LMR05 with an SM05L03
  • Suggested Fixed Lens Mounts: LMR05 with an SM05L05
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
ACN127-050-A Support Documentation
ACN127-050-Af=-50.0 mm, Ø1/2" Achromatic Doublet, ARC: 400-700 nm
$55.60
Today
ACN127-030-A Support Documentation
ACN127-030-Af=-30.0 mm, Ø1/2" Achromatic Doublet, ARC: 400-700 nm
$55.60
Today
ACN127-025-A Support Documentation
ACN127-025-Af=-25.0 mm, Ø1/2" Achromatic Doublet, ARC: 400-700 nm
$55.60
Today
ACN127-020-A Support Documentation
ACN127-020-Af=-20.0 mm, Ø1/2" Achromatic Doublet, ARC: 400-700 nm
$55.60
Today
AC127-019-A Support Documentation
AC127-019-Af=19.0 mm, Ø1/2" Achromatic Doublet, ARC: 400-700 nm
$49.90
Today
AC127-025-A Support Documentation
AC127-025-Af=25.0 mm, Ø1/2" Achromatic Doublet, ARC: 400-700 nm
$49.90
Today
AC127-030-A Support Documentation
AC127-030-Af=30.0 mm, Ø1/2" Achromatic Doublet, ARC: 400-700 nm
$49.90
Today
AC127-050-A Support Documentation
AC127-050-Af=50.0 mm, Ø1/2" Achromatic Doublet, ARC: 400-700 nm
$49.90
Today
AC127-075-A Support Documentation
AC127-075-Af=75.0 mm, Ø1/2" Achromatic Doublet, ARC: 400-700 nm
$49.90
Lead Time

Ø1" (Ø25.4 mm) Unmounted Positive and Negative Achromatic Doublets, ARC: 400 - 700 nm

Item #Diameter
(mm)
f a
(mm)
fba
(mm)
GraphsbR1a
(mm)
R2a
(mm)
R3a
(mm)
tc1
(mm)
tc2
(mm)
te
(mm)
MaterialsReference
Drawing
ACN254-100-Ac 25.4 -100.1 -103.6 info -52.0 49.9 600.0 2.0 4.0 7.7 N-BAK4/SF5 Achromatic Doublet Lens Drawing
ACN254-075-Ac 25.4 -75.1 -78.8 info -39.0 39.2 489.8 2.0 4.3 8.6 N-BAK4/SF5
ACN254-050-Ac 25.4 -50.0 -53.2 info -34.0 32.5 189.2 2.0 4.5 9.4 N-BAF10/N-SF6HT
ACN254-040-Ac 25.4 -40.1 -43.6 info -27.1 27.1 189.2 2.0 5.0 10.6 N-BAF10/N-SF11
AC254-030-Ac 25.4 30.0 22.9 info 20.9 -16.7 -79.8 12.0 2.0 8.8 N-BAF10/N-SF6HT Achromatic Doublet Lens Drawing
AC254-035-Ac 25.4 35.2 27.3 info 24.0 -19.1 -102.1 12.0 2.0 9.6 N-BAF10/N-SF6HT
AC254-040-Ac 25.4 40.1 33.4 info 23.7 -20.1 -57.7 10.0 2.5 7.4 N-BK7/SF5
AC254-045-Ad 25.4 45.0 40.2 info 31.2 -25.9 -130.6 7.0 2.0 5.7 N-BAF10/N-SF6HT
AC254-050-Ac 25.4 50.2 43.4 info 33.3 -22.3 -291.1 9.0 2.5 8.7 N-BAF10/SF10
AC254-060-Ac 25.4 60.1 54.3 info 41.7 -25.9 -230.7 8.0 2.5 8.2 E-BAF11/FD10
AC254-075-Ad 25.4 74.9 70.3 info 46.5 -33.9 -95.5 7.0 2.5 6.9 N-BK7/SF5
AC254-080-Ac 25.4 80.0 75.3 info 49.6 -35.5 -101.2 7.0 3.0 7.3 N-BK7/N-SF5
AC254-100-Ad 25.4 100.1 97.1 info 62.8 -45.7 -128.2 4.0 2.5 4.7 N-BK7/SF5
AC254-125-Ad 25.4 125.0 122.0 info 77.6 -55.9 -160.8 4.0 2.8 5.0 N-BK7/N-SF5
AC254-150-Ad 25.4 150.0 146.1 info 91.6 -66.7 -197.7 5.7 2.2 6.6 N-BK7/SF5
AC254-200-Ad 25.4 200.2 194.0 info 77.4 -87.6 291.1 4.0 2.5 5.7 N-SSK5/LAFN7
AC254-250-Ad 25.4 250.0 246.7 info 137.1 -111.5 -459.2 4.0 2.0 5.2 N-BK7/SF2
AC254-300-Ad 25.4 300.2 297.0 info 165.2 -137.1 -557.4 4.0 2.0 5.4 N-BK7/SF2
AC254-400-Ad 25.4 399.3 396.0 info 219.8 -181.6 -738.5 4.0 2.0 5.5 N-BK7/SF2
AC254-500-Ad 25.4 502.5 499.9 info 337.3 -186.8 -557.4 4.0 2.0 5.6 N-BK7/SF2
  • Positive values are measured from the right side of the lens as shown in the reference drawing. Negative values are measured from the left side of the lens.
  • Click on More Info Icon for plots and downloadable data of the focal length shift and transmission for the lens.
  • Suggested Fixed Lens Mounts: LMR1 with an SM1L05
  • Suggested Fixed Lens Mount: LMR1
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
ACN254-100-A Support Documentation
ACN254-100-Af=-100.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$83.40
Today
ACN254-075-A Support Documentation
ACN254-075-Af=-75.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$83.40
Today
ACN254-050-A Support Documentation
ACN254-050-Af=-50.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$83.40
Today
ACN254-040-A Support Documentation
ACN254-040-Af=-40.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$83.40
Today
AC254-030-A Support Documentation
AC254-030-Af=30.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$79.30
Today
AC254-035-A Support Documentation
AC254-035-Af=35.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$79.30
Today
AC254-040-A Support Documentation
AC254-040-Af=40.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$73.40
Today
AC254-045-A Support Documentation
AC254-045-Af=45.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$73.40
Today
AC254-050-A Support Documentation
AC254-050-Af=50.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$73.40
Today
AC254-060-A Support Documentation
AC254-060-Af=60.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$73.40
Today
AC254-075-A Support Documentation
AC254-075-Af=75.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$73.40
Today
AC254-080-A Support Documentation
AC254-080-ACustomer Inspired!f=80.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$73.40
Today
AC254-100-A Support Documentation
AC254-100-Af=100.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$73.40
Today
AC254-125-A Support Documentation
AC254-125-ACustomer Inspired!f=125.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$73.40
Today
AC254-150-A Support Documentation
AC254-150-Af=150.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$73.40
Today
AC254-200-A Support Documentation
AC254-200-Af=200.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$73.40
Today
AC254-250-A Support Documentation
AC254-250-Af=250.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$73.40
Today
AC254-300-A Support Documentation
AC254-300-Af=300.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$73.40
Today
AC254-400-A Support Documentation
AC254-400-Af=400.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$73.40
Today
AC254-500-A Support Documentation
AC254-500-Af=500.0 mm, Ø1" Achromatic Doublet, ARC: 400-700 nm
$73.40
Today

Ø30.0 mm Unmounted Positive Achromatic Doublets, AR Coated: 400 - 700 nm

Item #Diameter
(mm)
f a
(mm)
fba
(mm)
GraphsbR1a
(mm)
R2a
(mm)
R3a
(mm)
tc1
(mm)
tc2
(mm)
te
(mm)
MaterialsReference
Drawing
AC300-050-Ac 30.0 50.0 44.3 info 34.0 -29.4 -161.5 8.5 2.0 6.3 N-BAF10/N-SF6HT Achromatic Doublet Lens Drawing
AC300-080-Ad 30.0 80.0 74.3 info 56.0 -44.2 -219.8 8.5 2.0 7.9 N-BAF10/N-SF6HT
AC300-100-Ac 30.0 100.0 96.4 info 70.0 -57.0 -284.4 5.0 2.0 5.0 N-BAF10/N-SF6HT
  • Positive values are measured from the right side of the lens as shown in the reference drawing. Negative values are measured from the left side of the lens.
  • Click on More Info Icon for plots and downloadable data of the focal length shift and transmission for the lens.
  • Suggested Fixed Lens Mount: LMR30
  • Suggested Fixed Lens Mount: SCL03
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
AC300-050-A Support Documentation
AC300-050-Af=50.0 mm, Ø30 mm Achromatic Doublet, ARC: 400-700 nm
$83.20
Today
AC300-080-A Support Documentation
AC300-080-Af=80.0 mm, Ø30 mm Achromatic Doublet, ARC: 400-700 nm
$83.20
Today
AC300-100-A Support Documentation
AC300-100-Af=100.0 mm, Ø30 mm Achromatic Doublet, ARC: 400-700 nm
$83.20
Today

Ø2" (Ø50.8 mm) Unmounted Positive Achromatic Doublets, AR Coated: 400 - 700 nm

Item #Diameter
(mm)
f a
(mm)
fba
(mm)
GraphsbR1a
(mm)
R2a
(mm)
R3a
(mm)
tc1
(mm)
tc2
(mm)
te
(mm)
MaterialsReference
Drawing
AC508-075-Ac 50.8 75.0 61.7 info 50.8 -41.7 -247.7 20.0 3.0 14.9 E-BAF11/N-SF11 Achromatic Doublet Lens Drawing
AC508-080-Ac 50.8 80.0 69.9 info 54.9 -46.4 -247.2 16.0 2.0 10.5 N-BAF10/N-SF6HT
AC508-100-Ac 50.8 100.0 89.0 info 71.1 -44.2 -363.1 16.0 4.0 14.4 N-BAF10/SF10
AC508-150-Ad 50.8 150.0 140.4 info 83.2 -72.1 -247.7 12.0 3.0 9.7 N-BK7/SF5
AC508-180-Ad,f 50.8 180.0 172.7 info 109.7 -80.7 -238.5 12.0 2.0 9.4 N-BK7/N-SF5
AC508-200-Ae,f 50.8 200.0 193.7 info 109.9 -93.1 -376.3 8.5 2.0 6.7 N-BK7/SF2
AC508-250-Ae 50.8 250.0 244.6 info 137.1 -111.7 -459.2 7.5 2.0 6.4 N-BK7/SF2
AC508-300-Ae 50.8 300.0 295.4 info 161.5 -134.0 -580.8 6.0 2.0 5.4 N-BK7/SF2
AC508-400-Ae 50.8 400.0 396.1 info 219.8 -186.8 -760.0 5.0 2.0 5.1 N-BK7/SF2
AC508-500-Ae 50.8 500.0 495.8 info 272.9 -234.3 -970.0 5.0 2.0 5.5 N-BK7/SF2
AC508-750-Ae 50.8 750.0 746.5 info 417.8 -336.0 -1330.5 4.5 2.0 5.5 N-BK7/SF2
AC508-1000-Ae 50.8 1000.0 994.6 info 738.5 -398.1 -1023.3 4.0 2.0 5.2 N-BK7/SF2
  • Positive values are measured from the right side of the lens as shown in the reference drawing. Negative values are measured from the left side of the lens.
  • Click on More Info Icon for plots and downloadable data of the focal length shift and transmission for the lens.
  • Suggested Fixed Lens Mounts: LMR2 with an SM2L10
  • Suggested Fixed Lens Mounts: LMR2 with an SM2L05
  • Suggested Fixed Lens Mount: LMR2
  • Common microscope tube lens focal lengths. We also offer an infinity corrected tube lens with f = 200 mm here.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
AC508-075-A Support Documentation
AC508-075-Af=75.0 mm, Ø2" Achromatic Doublet, ARC: 400-700 nm
$116.00
Lead Time
AC508-080-A Support Documentation
AC508-080-Af=80.0 mm, Ø2" Achromatic Doublet, ARC: 400-700 nm
$116.00
Today
AC508-100-A Support Documentation
AC508-100-Af=100.0 mm, Ø2" Achromatic Doublet, ARC: 400-700 nm
$101.00
Today
AC508-150-A Support Documentation
AC508-150-Af=150.0 mm, Ø2" Achromatic Doublet, ARC: 400-700 nm
$101.00
Today
AC508-180-A Support Documentation
AC508-180-ACustomer Inspired!f=180.0 mm, Ø2" Achromatic Doublet, ARC: 400-700 nm
$101.00
Today
AC508-200-A Support Documentation
AC508-200-Af=200.0 mm, Ø2" Achromatic Doublet, ARC: 400-700 nm
$101.00
Today
AC508-250-A Support Documentation
AC508-250-Af=250.0 mm, Ø2" Achromatic Doublet, ARC: 400-700 nm
$101.00
Today
AC508-300-A Support Documentation
AC508-300-Af=300.0 mm, Ø2" Achromatic Doublet, ARC: 400-700 nm
$101.00
Today
AC508-400-A Support Documentation
AC508-400-Af=400.0 mm, Ø2" Achromatic Doublet, ARC: 400-700 nm
$101.00
Today
AC508-500-A Support Documentation
AC508-500-Af=500.0 mm, Ø2" Achromatic Doublet, ARC: 400-700 nm
$101.00
Today
AC508-750-A Support Documentation
AC508-750-Af=750.0 mm, Ø2" Achromatic Doublet, ARC: 400-700 nm
$101.00
Today
AC508-1000-A Support Documentation
AC508-1000-Af=1000.0 mm, Ø2" Achromatic Doublet, ARC: 400-700 nm
$101.00
Today
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