Mid-Infrared Enhanced Protected Gold Mirrors


  • Average Reflectance >98% from 2 µm to 20 µm
  • Round and Square Mirrors Available
  • Packages of 10 Round Mirrors at a Discounted Price

PF03-03-M02

Ø7.0 mm

PF20-03-M02

Ø2"

PF05-03-M02

Ø1/2"

PF10-03-M02

Ø1"

PF07-03-M02

Ø19 mm

PFSQ05-03-M02

1/2" x 1/2"

PFSQ10-03-M02

1" x 1"

PFSQ20-03-M02

2" x 2"

Related Items


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Benchtop Herriott Cell Using Specialty Mirrors
Click to Enlarge

This Herriott cell is comprised of two concave Herriott cell mirrors. A beam is turned first by the Ø1/2" plano mirror to the Ø1" mirror, then through the hole in the concave mirror. After bouncing between the concave mirrors, the beam exits the same hole it entered and is reflected onto a detector by the Ø1" plano mirror.
View Imperial Product List
Item #QtyDescription
UPH24Ø1/2" Universal Post Holder, Spring Loaded Locking Thumbscrew, L = 2"
TR24Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 2"
KM1003Kinematic Mirror Mount for Ø1" Optics
KM05FL1Rear-Loaded Left-Handed Clear-Quadrant Mirror Mount
R21Slip-On Post Collar for Ø1/2" Posts, 1/4"-20 Thumbscrew
PF03-03-M021Ø7.0 mm Mid-Infrared Enhanced Gold Mirror
PF10-03-M021Ø1" Mid-Infrared Enhanced Gold Mirror
CM254-100-M021Ø1" Gold-Coated Herriott Cell Mirror, No Hole, f=100.0 mm
CM254-100EH3-M021Ø1" Gold-Coated Herriott Cell Mirror, Ø3.0 mm Off-Axis Hole, f=100.0 mm
View Metric Product List
Item #QtyDescription
UPH50/M4Ø12.7 mm Universal Post Holder, Spring-Loaded Locking Thumbscrew, L = 50 mm
TR50/M4Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 50 mm
KM1003Kinematic Mirror Mount for Ø1" Optics
KM05FL/M1Rear-Loaded Left-Handed Clear-Quadrant Mirror Mount, Metric
R2/M1Slip-On Post Collar for Ø1/2" Posts, M6 Thumbscrew
PF03-03-M021Ø7.0 mm Mid-Infrared Enhanced Gold Mirror
PF10-03-M021Ø1" Mid-Infrared Enhanced Gold Mirror
CM254-100-M021Ø1" Gold-Coated Herriott Cell Mirror, No Hole, f=100.0 mm
CM254-100EH3-M021Ø1" Gold-Coated Herriott Cell Mirror, Ø3.0 mm Off-Axis Hole, f=100.0 mm
Mid-Infrared Enhanced Gold Mirror EngravingClick to Enlarge
Our mirrors 1/2" and larger are engraved with their item number for easy identification.

Features

  • High Reflectance from 2 µm to 20 µm for Angles of Incidence from 0° to 45°
    • Ravg > 98%
    • Rabs > 95%
  • Surface Flatness: λ/10 at 633 nm
  • Protective Overcoat per MIL-C-48497A
  • Five Round Mirror Diameters: 7 mm, 1/2", 19 mm, 1", and 2"
  • Three Square Mirror Options: 1/2", 1", and 2"

Thorlabs' Mid-Infrared Enhanced Gold Mirrors offer >98% average reflectance between 2 µm to 20 µm, without suffering losses found with protected gold mirrors. The overcoat on these mirrors allows them to perform better than our unprotected gold mirrors in the mid-infrared (MIR), while offering resistance to physical damages. These mirrors can be paired with our Quantum Cascade and Interband Cascade Lasers as well as our Mid-IR Super Continuum Laser for gas sensing and absorbing applications. We also provide this coating on a series of concave mirrors for Herriott cells to further facilitate the creation of gas sensing systems, as seen in the image to the right. While the overcoat applied to our Mid-Infrared Enhanced Gold Mirrors improves performance past 2 µm, it causes performance to suffer in the near-infrared spectral region.

The round Ø1/2", Ø1", and Ø2" mirrors are also available in packs of 10 at a discount over the individual price.

For applications that require performance below 2 µm, consider one of our other metallic mirror coatings, expanded on in the selection guide below, or a dielectric mirror.

Metal-Coated Plano Mirrors Selection Guide

Wavelength Range

Avg. Reflectance
(Click for Variation)

Coating

Suffix

Coating Comparison

250 nm - 450 nm >90% UV Enhanced Aluminum -F01 icon
Raw Data
450 nm - 20 μm >90% for 450 nm - 2 µm
>95% for 2 - 20 µm
Protected Aluminum -G01
750 nm - 1 µm Rs > 99.0%
RP > 98.5%
Ultrafast-Enhanced Silver -AG icon
Raw Data
450 nm - 20 μm >97.5% for 450 nm - 2 µm
>96% for 2 - 20 µm
Protected Silver -P01
>97% for 450 nm - 2 µm
>95% for 2 - 20 µm
Protected Silvera -P02
800 nm - 20 μm >96% Protected Gold -M01 icon
Raw Data
2 µm - 20 µm >98% MIR Enhanced Gold -M02
800 nm - 20 μm >97% Unprotected Gold -M03
10.6 µm Laser Line >99% Unprotected Gold -L01
Metal-Coated Zerodur® Mirrors
Economy Front Surface Mirrors with Protected Metallic Coatings
  • This variation of our protected silver coating is only found on the PFR14-P02 Rectangular Mirror.
Optical Coatings
Optic Cleaning Tutorial

The shaded regions in the graphs denote the ranges over which we guarantee the specified reflectance. Please note that the reflectance outside of these bands is typical and can vary from lot to lot, especially in out-of-band regions where the reflectance is fluctuating or sloped.

Protected Gold at Near-Normal Incident Angle
Click to Enlarge

Excel Spreadsheet with Raw Data for Protected Gold
Protected Gold at 45 Degree Incident Angle
Click to Enlarge

Excel Spreadsheet with Raw Data for Protected Gold
Damage Threshold Specifications
Coating Designation
(Item # Suffix)
Damage Threshold
-M02 Pulsed 0.1 J/cm2 at 1.064 µm, 10 ns, 10 Hz, Ø1.06 mm
3 J/cm2 at 10.6 µm, 100 ns, 1 Hz, Ø1.29 mm
CWa 25 W/cm at 1.07 µm, Ø1.04 mm
450 W/cm at 10.6 µm, Ø1.18 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' Mid-Infrared Enhanced Mirrors

The specifications to the right are measured data for Thorlabs' mid-infrared enhanced gold mirror coatings. Damage threshold specifications are constant for a given coating type, regardless of the size or shape 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/DIS 11254 and ISO 21254 specifications.

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 30 seconds (CW) or for a 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.

When pulse lengths are between 1 ns and 1 µs, laser-induced damage can occur either because of absorption or a dielectric breakdown (therefore, a user 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 high 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. Beam diameter of your beam (1/e2)
  3. Approximate intensity profile of your beam (e.g., Gaussian)
  4. Linear power density of your beam (total power divided by 1/e2 beam diameter)

Thorlabs expresses LIDT for CW lasers as a linear power density measured in W/cm. 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, as demonstrated by the graph to the right. Average linear power density can be calculated using the equation below. 

The calculation above 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 (1998).
[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.


Posted Comments:
David Lafayette  (posted 2023-06-12 09:31:52.883)
These mirrors produce ~two orders of magnitude more second harmonic light when excited with an 800nm pulsed laser than your M01 (protected Au), F01 (UV-enhanced Al), or P01 (protected Ag) mirrors, to the point where I am now intentionally using M02 mirrors for this purpose. What makes these mirrors so second-harmonic generation active?
jpolaris  (posted 2023-06-15 03:44:03.0)
Thank you for contacting Thorlabs. The overcoats on the -M02 coated mirrors have at least one material in them that has a higher nonlinear susceptibility than the overcoats on the -M01, -F01, and -P01 coated mirrors. The composition of these overcoats is considered proprietary, but the since the -M02 is an MIR mirror, it will use other exotic materials than the non-MIR mirrors. These other materials are likely driving the increased nonlinear behavior.
user  (posted 2021-11-25 16:24:25.32)
Is it possible to make Round Mid-Infrared Enhanced Mirrors with 3" and 4" diameter? What will be cost for such mirror for 1pc and pack of 10?
YLohia  (posted 2021-12-02 03:17:23.0)
Custom items can be requested by clicking the "Request Quote" button above or by contacting your local Thorlabs group (in your case, techsupport.se@thorlabs.com). We will discuss the possibility of offering this directly.
kkmion  (posted 2018-12-03 07:11:05.047)
Do you have data sheet below 400 nm?
YLohia  (posted 2019-01-31 02:31:26.0)
Hello, thank you for contacting Thorlabs. May I ask what your application is and why you need to use these mid-IR mirrors at UV wavelengths? What wavelength are you specifically hoping to use this at? What specs are you looking for? We supply the raw data for the reflectance down to 350nm on the website: https://www.thorlabs.com/images/TabImages/Thorlabs_MIR_Gold_Coating_M02.xlsx. We reached out to you directly to gather more information about your application.
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Round Mid-Infrared Enhanced Mirrors

Item # PF03-03-M02 PF05-03-M02 PF07-03-M02 PF10-03-M02 PF20-03-M02
Diameter 7.0 mm 1/2" (12.7 mm) 19.0 mm 1" (25.4 mm) 2" (50.8 mm)
Diameter Tolerance +0.0 mm / -0.1 mm
Thickness 2.0 mm (0.08") 6.0 mm (0.24") 6.0 mm (0.24") 6.0 mm (0.24") 12.0 mm (0.47")
Thickness Tolerance ±0.2 mm
Clear Aperture >Ø6.3 mm >Ø11.4 mm >Ø17.1 mm >Ø22.9 mm >Ø45.7 mm
Reflectance Ravg > 98%, Rabs > 95% from 2 µm to 20 μm @ 0° to 45° AOI
Reflectance Curve (Click for Plot)
Click Here for Raw Data
Substrate Fused Silica
Front Surface Flatness
(Peak to Valley)
<λ/10 @ 633 nm
Surface Quality 40-20 Scratch-Dig
Parallelism <3 arcmin
Damage Threshold (Pulsed) 0.1 J/cm2 at 1.064 µm, 10 ns, 10 Hz, Ø1.06 mm
3 J/cm2 at 10.6 µm, 100 ns, 1 Hz, Ø1.29 mm
Damage Threshold (CW)a 25 W/cm at 1.070 µm, Ø1.04 mm
450 W/cm at 10.6 µm, Ø1.18 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 Damage Thresholds tab.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
PF03-03-M02 Support Documentation
PF03-03-M02Customer Inspired! Ø7.0 mm Mid-Infrared Enhanced Gold Mirror
$41.92
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PF05-03-M02 Support Documentation
PF05-03-M02Customer Inspired! Ø1/2" Mid-Infrared Enhanced Gold Mirror
$47.76
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PF05-03-M02-10 Support Documentation
PF05-03-M02-10Ø1/2" Mid-Infrared Enhanced Gold Mirror, 10 Pack
$397.20
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PF07-03-M02 Support Documentation
PF07-03-M02Customer Inspired! Ø19 mm Mid-Infrared Enhanced Gold Mirror
$61.73
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PF10-03-M02 Support Documentation
PF10-03-M02Customer Inspired! Ø1" Mid-Infrared Enhanced Gold Mirror
$71.04
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PF10-03-M02-10Ø1" Mid-Infrared Enhanced Gold Mirror, 10 Pack
$622.20
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PF20-03-M02 Support Documentation
PF20-03-M02Customer Inspired! Ø2" Mid-Infrared Enhanced Gold Mirror
$133.93
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PF20-03-M02-10 Support Documentation
PF20-03-M02-10Ø2" Mid-Infrared Enhanced Gold Mirror, 10 Pack
$1,230.76
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Square Mid-Infrared Enhanced Mirrors

Item # PFSQ05-03-M02 PFSQ10-03-M02 PFSQ20-03-M02
Face Dimensions 1/2" x 1/2" (12.7 mm x 12.7 mm) 1" x 1" (25.4 mm x 25.4 mm) 2" x 2" (50.8 mm x 50.8 mm)
Face Dimension Tolerance +0.0 mm / -0.1 mm
Thickness 6.0 mm (0.24")
Thickness Tolerance ±0.2 mm
Clear Aperture >11.4 mm x 11.4 mm >22.9 mm x 22.9 mm >45.7 mm x 45.7 mm
Reflectance Ravg > 98%, Rabs > 95% from 2 µm to 20 μm @ 0° to 45° AOI
Reflectance Curve (Click for Plot)
Substrate Fused Silica
Front Surface Flatness 
(Peak to Valley)
<λ/10 @ 633 nm
Surface Quality 40-20 Scratch-Dig
Parallelism <3 arcmin
Damage Threshold (Pulsed) 0.1 J/cm2 at 1.064 µm, 10 ns, 10 Hz, Ø1.06 mm
3 J/cm2 at 10.6 µm, 100 ns, 1 Hz, Ø1.29 mm
Damage Threshold (CW)a 25 W/cm at 1.070 µm, Ø1.04 mm
450 W/cm at 10.6 µm, Ø1.18 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 Damage Thresholds tab.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
PFSQ05-03-M02 Support Documentation
PFSQ05-03-M02Customer Inspired! 1/2" x 1/2" Mid-Infrared Enhanced Gold Mirror
$53.57
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PFSQ10-03-M02 Support Documentation
PFSQ10-03-M02Customer Inspired! 1" x 1" Mid-Infrared Enhanced Gold Mirror
$76.87
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PFSQ20-03-M02 Support Documentation
PFSQ20-03-M02Customer Inspired! 2" x 2" Mid-Infrared Enhanced Gold Mirror
$145.58
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