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Shortpass Dichroic Mirrors / Beamsplitters


  • Cutoff Wavelengths from 638 nm to 1500 nm
  • >90% Average Transmission in Band
  • >95% Average Reflectance in Band
  • Durable Hard Coatings

DMSP1000R

(25 x 36 mm)

DMSP805L

(Ø2")

DMSP1180

(Ø1")

DMSP1500T

(Ø1/2")

Application Idea

Dichroic Cage Cube Holding
a Rectangular Dichroic Mirror

Related Items


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Dichroic Mirror Engraving
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Round Versions: Engraved Arrow Denotes Side with AR Coating (See Applications Tab for Details)
Dichroic Mirror Engraving
Click to Enlarge

Rectangular Versions (Except 750 nm Dichroic): Engraved Face Has Dichroic Coating
Dichroic Mirror Engraving
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750 nm Rectangular Dichroic: Caret Points to AR-Coated Side
Quick Links
Cutoff
Wavelength
Type Item # Prefix
638 nm Shortpass DMSP638
650 nm Shortpass DMSP650
750 nm Shortpass DMSP750
805 nm Shortpass DMSP805
950 nm Shortpass DMSP950
1000 nm Shortpass DMSP1000
1180 nm Shortpass DMSP1180
1500 nm Shortpass DMSP1500
Optical Coatings Guide
Optic Cleaning Tutorial

Features

  • Dichroic Filters Function as Shortpass Filters with Minimal Absorption Losses
  • Four Sizes Available: Ø1/2", Ø1", Ø2", or 25 mm x 36 mm
    • 750 nm Dichroic Available in 35 mm x 52 mm Only
  • Hard Coating Allows Easy Handling and Cleaning
  • Resistant to Damage from UV Light and Chemicals

Thorlabs' Dichroic Mirrors/Beamsplitters spectrally separate light by transmitting and reflecting light as a function of wavelength. Shortpass dichroic mirrors are highly transmissive below the cutoff wavelength and highly reflective above it. We also offer longpass dichroic mirrors, which are highly transmissive above the cutoff wavelength and highly reflective below it.

Our dichroic mirrors are offered in several different cutoff wavelengths ranging from 638 to 1500 nm, which are listed in the table to the right. Except for the 750 nm dichroic mirror, they provide >85% absolute transmission and >90% absolute reflection over their specified bands (please see below for representative plots); the 750 nm dichroic provides >93% average transmission and >96% average reflection over the respective bands. They are designed for use at a 45° angle of incidence and are available in four sizes: Ø1/2", Ø1", Ø2", and 25 mm x 36 mm, except for the 750 nm dichroic, which is available only in 35 mm x 52 mm.

As shown in the Applications tab, these optics can be used to combine a beam that has a wavelength (or wavelength range) shorter than the cutoff wavelength with a beam that has a wavelength (or wavelength range) longer than the cutoff wavelength. They are also commonly used to split spatially overlapping beams of different colors.

These optics feature a dichroic coating on one surface and an antireflection coating on the opposing surface. For all dichroics except the 750 nm dichroic, the optics use the following engraving conventions: on round optics, an engraved arrow points toward the surface with the AR coating; on rectangular optics, the side with the engraving has the dichroic coating. The optic with a 750 nm cutoff wavelength features a caret on the side, pointing in the direction of the AR-coated surface.

For thermally sensitive applications, Thorlabs also offers Hot and Cold Mirrors.

Surface Quality and Durability
Thorlabs' Dichroic Mirrors/Beamsplitters consist of a hard, ion-beam-sputtered coating deposited on a UV fused silica substrate, providing virtually zero autofluorescence and a low coefficient of thermal expansion, making them an ideal choice for applications from the UV to the near IR. The hard coatings themselves have a 40-20 scratch-dig surface quality and allow the optics to be cleaned and handled like typical glass. As opposed to soft coatings, they have improved resistance to humidity and can withstand high optical irradiation intensities with no noticeable degradation or burns, even under prolonged exposure to ultraviolet light. Please see the Damage Thresholds tab for detailed information on the damage thresholds of these filters.

Mounting Options
For customers who wish to use these dichroic mirrors/beamsplitters in microscopy applications, Thorlabs manufactures a family of filter cubes and mounts.

The 750 nm dichroic is specifically designed for use with the Cerna Breadboard Top with Two-Position Slider for DIY microscopy.

General Specifications
Size Ø1/2" Ø1" Ø2" 25.0 mm x 36.0 mm 35.0 mm x 52.0 mm
Clear Aperture ≥Ø11.43 mm ≥Ø22.86 mm ≥Ø45.72 mm ≥22.5 mm x 32.4 mm ≥85%, Elliptical
Thickness 3.2 mm 3.2 mm 5.0 mm 1.0 mm 3.0 mm
Incident Angle 45°
Surface Quality 40-20 Scratch-Dig
Transmitted Wavefront Error <λ/4 @ 633 nm Over Clear Aperture
Substrate Material UV Fused Silica
Operating Temperature -50 to 80 °C -

Wavelength Specifications
Item Prefix Type Cutoff
Wavelength
Transmission
Banda
Reflection
Bandb
AR Coating
Rangec
Damage Threshold
DMSP638 Shortpass 638 nm 580 - 621 nm 655 - 800 nm 580 - 621 nm -
DMSP650 Shortpass 650 nm 400 - 633 nm 685 - 1600 nm 400 - 633 nm -
DMSP750 Shortpass 750 nm 400 - 730 nm 770 - 1100 nm - -
DMSP805 Shortpass 805 nm 400 - 788 nm 823 - 1300 nm 400 - 800 nm 1.00 J/cm2 (532 nm, 10 Hz, 10 ns, Ø250 µm)
7.00 J/cm2 (1064 nm, 10 Hz, 12 ns, Ø250 µm)
DMSP950 Shortpass 950 nm 420 - 900 nm 990 - 1600 nm 420 - 900 nm -
DMSP1000 Shortpass 1000 nm 520 - 985 nm 1020 - 1550 nm 520 - 985 nm 1.00 J/cm2 (532 nm, 10 Hz, 10 ns, Ø250 µm)
9.50 J/cm2 (1064 nm, 10 Hz, 12 ns, Ø250 µm)
DMSP1180 Shortpass 1180 nm 750 - 1100 nm 1260 - 1700 nm 750 - 1100 nm 3.0 J/cm2 (1064 nm, 10 Hz, 10 ns, Ø1.00 mm)
DMSP1500 Shortpass 1500 nm 1000 - 1450 nm 1550 - 2000 nm 932 - 1700 nm 7.00 J/cm2 (1064 nm, 10 Hz, 12 ns, Ø250 µm)
  • The average transmission over the transmission band is greater than 90%. The absolute transmission over the transmission band is greater than 85% for all dichroics except the DMSP750B. 
  • The average reflection over the reflection band is greater than 95%. The absolute reflection over the reflection band is greater than 90% for all dichroics except the DMSP750B.
  • Over the AR coating range, Rabs < 2% on the AR-coated surface for all dichroics except the DMSP750B.

Typical Applications

  • Fluorescence Microscopy
  • Splitting or Combining Two Beams of Different Wavelengths
  • Filtering of Spectral Components

Ray Diagram Illustration
Figure 1 depicts a dichroic mirror/beamsplitter being used to combine a transmitted beam (blue) with a reflected beam (red). The transmitted beam has a wavelength in the transmission band of the optic, and the reflected beam has a wavelength in the reflection band of the optic. If the direction of propagation is reversed, the optic becomes a beamsplitter, as shown in Figure 2.

In both cases, the combined, polychromatic beam is on the dichroic coated side of the dichroic filter. To minimize absorption losses in these optics, we recommend orienting them such that the wavelength being reflected does not pass through the substrate. Dichroic mirrors/beamsplitters differ from typical beamsplitters in that the beams can be combined or separated without a significant loss of intensity.


Figure 1. This figure depicts a dichroic mirror being used to combine two beams of different colors.

Figure 2. This figure depicts a dichroic mirror being used to split two beams of different colors.
Damage Threshold Specifications
Coating Designation
(Item # Prefix)
Damage Threshold
DMSP638 -
DMSP650 -
DMSP750 -
DMSP805 1.00 J/cm2  (532 nm, 10 Hz, 10 ns, Ø250 µm)
7.00 J/cm2  (1064 nm, 10 Hz, 12 ns, Ø250 µm)
DMSP950 -
DMSP1000 1.00 J/cm2  (532 nm, 10 Hz, 10 ns, Ø250 µm)
9.50 J/cm2  (1064 nm, 10 Hz, 12 ns, Ø250 µm)
DMSP1180 3.0 J/cm2 (1064 nm, 10 Hz, 10 ns, Ø1.00 mm)
DMSP1500 7.00 J/cm2  (1064 nm, 10 Hz, 12 ns, Ø250 µm)

Damage Threshold Data for Thorlabs' Dichroic Mirrors/Beamsplitters

The specifications to the right are measured data for Thorlabs' dichroic mirrors/beamsplitters. Damage threshold specifications are constant for a given coating type, regardless of the size of the mirror.

 

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 Locations Locations with Damage Locations 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 beam diameter)
  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 expressing the LIDT as a linear power density provides the best metric for long pulse and CW sources. In this regime, the LIDT given as a linear power density can be applied to any beam diameter; 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 non-uniform 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 No Comparison (See Above) 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 expressing the LIDT as an energy density provides the best metric for short pulse sources. In this regime, the LIDT given as an energy density can be applied to any beam diameter; 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:parksj003
Posted Date:2016-12-09 17:45:09.043
Hello, I am looking for the proper dichroic mirror (size of 25.0 mm x 36.0 mm) for the super- resolution microscope. Would you let me know if there is any rule to choose proper dichroic in terms of flatness? As far as I know, flatness affects the imaging quality a lot. Here, the beam is reflected at the dichroic and directed to the objective lens. Best, Seongjun Park
Poster:tfrisch
Posted Date:2016-12-15 05:18:53.0
Hello, thank you for contacting Thorlabs. In most imaging applications, the transmitted wavefront error (TWE) is more critical than the flatness, and generally TWE is much better than the flatness. I will contact you directly about when to use flatness and when to use TWE.

Shortpass Dichroic Mirrors/Beamsplitters: 638 nm Cutoff Wavelength

DMSP638 Transmission and Reflectivity
Click to Enlarge

Click Here for Raw Data from 250 - 2500 nm
Specificationsa
Cutoff Wavelength 638 nm
Transmission Band (Tabs > 85%, Tavg > 90%) 580 - 621 nm
Reflection Band (Rabs > 90%, Ravg > 95%) 655 - 800 nm
Item # More Info
DMSP638T info
DMSP638 info
DMSP638L info
DMSP638R info
  • The shaded regions in the graph to the right denote the transmission and reflection bands of the dichroic mirror/beamsplitter for which the performance is guaranteed to meet the stated specifications. Performance outside the shaded regions will vary from lot to lot and is not guaranteed.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
DMSP638T Support Documentation
DMSP638TCustomer Inspired!Ø1/2" Shortpass Dichroic Mirror, 638 nm Cutoff
$174.00
Today
DMSP638 Support Documentation
DMSP638Customer Inspired!Ø1" Shortpass Dichroic Mirror, 638 nm Cutoff
$261.00
Today
DMSP638L Support Documentation
DMSP638LCustomer Inspired!Ø2" Shortpass Dichroic Mirror, 638 nm Cutoff
$561.00
Today
DMSP638R Support Documentation
DMSP638RCustomer Inspired!25 mm x 36 mm Shortpass Dichroic Mirror, 638 nm Cutoff
$500.00
Today

Shortpass Dichroic Mirrors/Beamsplitters: 650 nm Cutoff Wavelength

DMSP8055 Transmission adn Reflectivity
Click to Enlarge

Click Here for Raw Data from 250 - 2500 nm
Specificationsa
Cutoff Wavelength 650 nm
Transmission Band (Tabs > 85%, Tavg > 90%) 400 - 633 nm
Reflection Band (Rabs > 90%, Ravg > 95%) 685 - 1600 nm
Item # More Info
DMSP650T info
DMSP650 info
DMSP650L info
DMSP650R info
  • The shaded regions in the graph to the right denote the transmission and reflection bands of the dichroic mirror/beamsplitter for which the performance is guaranteed to meet the stated specifications. Performance outside the shaded regions will vary from lot to lot and is not guaranteed.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
DMSP650T Support Documentation
DMSP650TCustomer Inspired!Ø1/2" Shortpass Dichroic Mirror, 650 nm Cutoff
$174.00
Today
DMSP650 Support Documentation
DMSP650Customer Inspired!Ø1" Shortpass Dichroic Mirror, 650 nm Cutoff
$261.00
Today
DMSP650L Support Documentation
DMSP650LCustomer Inspired!Ø2" Shortpass Dichroic Mirror, 650 nm Cutoff
$561.00
Today
DMSP650R Support Documentation
DMSP650RCustomer Inspired!25 mm x 36 mm Shortpass Dichroic Mirror, 650 nm Cutoff
$500.00
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Shortpass Dichroic Mirrors/Beamsplitter: 750 nm Cutoff Wavelength

DMSP750 Transmission and Reflectance
Click to Enlarge

Click Here for Raw Data from 350 - 2500 nm
Specificationsa
Cutoff Wavelength 750 nm
Transmission Band (Tavg > 93%) 400 - 730 nm
Reflection Band (Ravg > 96%) 770 - 1100 nm
Item # More Info
DMSP750B info
  • The shaded regions in the graph to the right denote the transmission and reflection bands of the dichroic mirror/beamsplitter for which the performance is guaranteed to meet the stated specifications. Performance outside the shaded regions will vary from lot to lot and is not guaranteed.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
DMSP750B Support Documentation
DMSP750BNEW!35 mm x 52 mm Shortpass Dichroic Mirror, 750 nm Cutoff
$980.00
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Shortpass Dichroic Mirrors/Beamsplitters: 805 nm Cutoff Wavelength

DMSP8055 Transmission adn Reflectivity
Click to Enlarge

Click Here for Raw Data from 200 - 2600 nm
Specificationsa
Cutoff Wavelength 805 nm
Transmission Band (Tabs > 85%, Tavg > 90%) 400 - 788 nm
Reflection Band (Rabs > 90%, Ravg > 95%) 823 - 1300 nm
Item # More Info
DMSP805T info
DMSP805 info
DMSP805L info
DMSP805R info
  • The shaded regions in the graph to the right denote the transmission and reflection bands of the dichroic mirror/beamsplitter for which the performance is guaranteed to meet the stated specifications. Performance outside the shaded regions will vary from lot to lot and is not guaranteed.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
DMSP805T Support Documentation
DMSP805TCustomer Inspired!Ø1/2" Shortpass Dichroic Mirror, 805 nm Cutoff
$174.00
Today
DMSP805 Support Documentation
DMSP805Ø1" Shortpass Dichroic Mirror, 805 nm Cutoff
$261.00
Today
DMSP805L Support Documentation
DMSP805LØ2" Shortpass Dichroic Mirror, 805 nm Cutoff
$561.00
Today
DMSP805R Support Documentation
DMSP805R25 mm x 36 mm Shortpass Dichroic Mirror, 805 nm Cutoff
$500.00
Today

Shortpass Dichroic Mirrors/Beamsplitters: 950 nm Cutoff Wavelength

DMSP950 Transmission and Reflectivity
Click to Enlarge

Click Here for Raw Data from 200 - 2600 nm
Specificationsa
Cutoff Wavelength 950 nm
Transmission Band (Tabs > 85%, Tavg > 90%) 420 - 900 nm
Reflection Band (Rabs > 90%, Ravg > 95%) 990 - 1600 nm
Item # More Info
DMSP950T info
DMSP950 info
DMSP950L info
DMSP950R info
  • The shaded regions in the graph to the right denote the transmission and reflection bands of the dichroic mirror/beamsplitter for which the performance is guaranteed to meet the stated specifications. Performance outside the shaded regions will vary from lot to lot and is not guaranteed.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
DMSP950T Support Documentation
DMSP950TCustomer Inspired!Ø1/2" Shortpass Dichroic Mirror, 950 nm Cutoff
$174.00
Today
DMSP950 Support Documentation
DMSP950Customer Inspired!Ø1" Shortpass Dichroic Mirror, 950 nm Cutoff
$261.00
Today
DMSP950L Support Documentation
DMSP950LCustomer Inspired!Ø2" Shortpass Dichroic Mirror, 950 nm Cutoff
$561.00
Today
DMSP950R Support Documentation
DMSP950RCustomer Inspired!25 mm x 36 mm Shortpass Dichroic Mirror, 950 nm Cutoff
$500.00
Today

Shortpass Dichroic Mirrors/Beamsplitters: 1000 nm Cutoff Wavelength

DMSP1000 Transmission and Reflectivity
Click to Enlarge

Click Here for Raw Data from 200 - 2600 nm
Specificationsa
Cutoff Wavelength 1000 nm
Transmission Band (Tabs > 85%, Tavg > 90%) 520 - 985 nm
Reflection Band (Rabs > 90%) 1020 - 1550 nm
Item # More Info
DMSP1000T info
DMSP1000 info
DMSP1000L info
DMSP1000R info
  • The shaded regions in the graph to the right denote the transmission and reflection bands of the dichroic mirror/beamsplitter for which the performance is guaranteed to meet the stated specifications. Performance outside the shaded regions will vary from lot to lot and is not guaranteed.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
DMSP1000T Support Documentation
DMSP1000TCustomer Inspired!Ø1/2" Shortpass Dichroic Mirror, 1000 nm Cutoff
$174.00
Today
DMSP1000 Support Documentation
DMSP1000Customer Inspired!Ø1" Shortpass Dichroic Mirror, 1000 nm Cutoff
$261.00
Today
DMSP1000L Support Documentation
DMSP1000LCustomer Inspired!Ø2" Shortpass Dichroic Mirror, 1000 nm Cutoff
$561.00
Today
DMSP1000R Support Documentation
DMSP1000RCustomer Inspired!25 mm x 36 mm Shortpass Dichroic Mirror, 1000 nm Cutoff
$500.00
Today

Shortpass Dichroic Mirrors/Beamsplitters: 1180 nm Cutoff Wavelength

DMSP1180 Transmission and Reflectivity
Click to Enlarge

Click Here for Raw Data from 300 - 2600 nm
Specificationsa
Cutoff Wavelength 1180 nm
Transmission Band (Tabs > 85%, Tavg > 90%) 750 - 1100 nm
Reflection Band (Rabs > 90%, Ravg > 95%) 1260 - 1700 nm
Item # More Info
DMSP1180T info
DMSP1180 info
DMSP1180L info
DMSP1180R info
  • The shaded regions in the graph to the right denote the transmission and reflection bands of the dichroic mirror/beamsplitter for which the performance is guaranteed to meet the stated specifications. Performance outside the shaded regions will vary from lot to lot and is not guaranteed.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
DMSP1180T Support Documentation
DMSP1180TCustomer Inspired!Ø1/2" Shortpass Dichroic Mirror, 1180 nm Cutoff
$174.00
Today
DMSP1180 Support Documentation
DMSP1180Customer Inspired!Ø1" Shortpass Dichroic Mirror, 1180 nm Cutoff
$261.00
Today
DMSP1180L Support Documentation
DMSP1180LCustomer Inspired!Ø2" Shortpass Dichroic Mirror, 1180 nm Cutoff
$561.00
Today
DMSP1180R Support Documentation
DMSP1180RCustomer Inspired!25 mm x 36 mm Shortpass Dichroic Mirror, 1180 nm Cutoff
$500.00
Today

Shortpass Dichroic Mirrors/Beamsplitters: 1500 nm Cutoff Wavelength

DMSP1500 Transmission and Reflectivity
Click to Enlarge

Click Here for Raw Data from 200 - 2600 nm
Specificationsa
Cutoff Wavelength 1500 nm
Transmission Band (Tabs > 85%, Tavg > 90%) 1000 -1450 nm
Reflection Band (Rabs > 90%) 1550 - 2000 nm
Item # More Info
DMSP1500T info
DMSP1500 info
DMSP1500L info
DMSP1500R info
  • The shaded regions in the graph to the right denote the transmission and reflection bands of the dichroic mirror/beamsplitter for which the performance is guaranteed to meet the stated specifications. Performance outside the shaded regions will vary from lot to lot and is not guaranteed.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available / Ships
DMSP1500T Support Documentation
DMSP1500TCustomer Inspired!Ø1/2" Shortpass Dichroic Mirror, 1500 nm Cutoff
$174.00
Today
DMSP1500 Support Documentation
DMSP1500Customer Inspired!Ø1" Shortpass Dichroic Mirror, 1500 nm Cutoff
$261.00
Today
DMSP1500L Support Documentation
DMSP1500LCustomer Inspired!Ø2" Shortpass Dichroic Mirror, 1500 nm Cutoff
$561.00
Today
DMSP1500R Support Documentation
DMSP1500RCustomer Inspired!25 mm x 36 mm Shortpass Dichroic Mirror, 1500 nm Cutoff
$500.00
Today
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