Products Home / Optical Elements / Optical Mirrors / Concave Mirrors / Concave Mirrors: Protected Silver (450 nm - 20 µm)Concave Mirrors: Protected Silver (450 nm - 20 µm)
- Protected Silver Coating
- Focal Lengths from 9.5 - 1000 mm
- Ø1/2", Ø1", Ø2", or Ø75 mm
- No Chromatic Aberration
CM750-056-P01
Ø75 mm
CM508-038-P01
Ø2"
CM254-019-P01
Ø1"
CM127-010-P01
Ø1/2"
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| Common Specifications | |
|---|---|
| Available Diameters | 1/2", 1", 2", and 75 mm |
| Metallic Coating Range | 450 - 20 µm; Ravg > 97% from 450 nm - 2 µm; Ravg > 95% from 2 µm - 20 µm |
| Clear Aperture | >90% of Diameter |
| Surface Quality | 40-20 Scratch-Dig |
| Diameter Tolerance | +0.0/-0.2 mm |
| Substrate | N-BK7a |
| Backside Surface | Fine Ground and Engraved with Part Number (Not Polished) |
| Metallic-Coated Concave Mirrors | |
|---|---|
| UV-Enhanced Aluminum 250 - 450 nm |
Protected Aluminum 450 nm - 20 µm |
| Protected Silver 450 nm - 20 µm |
Protected Gold 800 nm - 20 µm |
See the Concave Mirror Guide tab, above, for our complete selection of concave mirrors.
Features
- Protected Silver: 450 nm - 20 µm
- Four Diameter Options: 1/2", 1", 2", or 75 mm
- Focal Lengths Range from 9.5 mm - 1000 mm
Thorlabs' Protected Silver-Coated Concave Mirrors are designed for light collection, imaging, and focusing applications. These reflective optics focus light without chromatic aberration, making them especially suitable for broadband sources.
These mirrors consist of a silver-coated N-BK7 substrate that features a protective SiO2 overcoat. They offer >95% average reflectance in the spectral range from 2 - 20 µm and >97% average reflectance in the spectral range from 450 nm - 2 µm. For applications near 780 nm, protected silver mirrors are significantly better than protected aluminum mirrors. With ≤λ/4 surface irregularity at 633 nm, these mirrors provide excellent image quality.
All of the mirrors on this page can be mounted by our Precision Kinematic Mirror Mounts.
Due to their high reflectance over the 450 nm - 20 µm range, these mirrors are also well suited for use with femtosecond pulsed lasers. For our full selection of optics for ultrafast applications, please see the Ultrafast Optics tab.
Please contact Tech Support for custom versions of these optics. Thorlabs also offers dielectric concave mirrors that provide higher reflectivity than metal mirrors at the expense of operating over a more narrow wavelength range.
Care and Handling
Silver coated mirrors require additional care due to their susceptibility to damage from environmental conditions and improper handling. Fingerprints, contact with abrasive surfaces, and environments with high humidity or temperature will diminish the effectiveness of the protective overcoat leaving the silver coating susceptible to oxidation and degradation. When working with silver mirrors, follow standard practices for handling optics. Latex gloves or similar protective coverings are recommended to prevent oil and other residues on the user’s fingers from reaching the optical surface. Even with such precautions, care should be taken not to touch the mirrored face or edges. Silver mirrors should be used and stored in areas at room temperature with minimal humidity. For information on how to clean mirrors and other optics, visit our Optic Cleaning Tutorial.
The shaded regions in the graphs denote the range over which we guarantee the specified reflectance. Please note that the reflectance outside of this band can vary from lot to lot, especially in out-of-band regions where the reflectance is fluctuating or sloped.
Thorlabs offers a wide selection of optics optimized for use with femtosecond and picosecond laser pulses. Please see below for more information.
| Low-GDD Mirrors | |||||
|---|---|---|---|---|---|
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| 355 - 445 nm | 460 - 590 nm | 700 - 930 nm | 970 - 1150 nm | 1400 - 1700 nm | 1760 - 2250 nm |
| Dielectric Mirror | High-Power Mirrors for Picosecond Lasers |
Metallic Mirrors | Low-GDD Pump-Through Mirrors |
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| Dual-Band Dielectric Mirror, 400 nm and 800 nm |
Ytterbium Laser Line Mirrors, 250 nm - 1080 nm |
Ultrafast-Enhanced Silver Mirrors, 750 - 1000 nm |
Protected Silver Mirrors, 450 nm - 20 µm |
Unprotected Gold Mirrors, 800 nm - 20 µm |
Pump-Through Mirrors, 1030 - 1080 nm and 940 - 980 nm |
| Deterministic GDD Beamsplitters |
Low-GDD Harmonic Beamsplitters |
Low-GDD Polarizing Beamsplitters |
β-BBO Crystals | Dispersion-Compensating Optics | |
|---|---|---|---|---|---|
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| Beamsplitters & Windows, 600 - 1500 nm or 1000 - 2000 nm |
Harmonic Beamsplitters, 400 nm and 800 nm or 500 nm and 1000 nm |
High-Power, Broadband, High Extinction Ratio Polarizers, 700 - 1300 nm | β-BBO Crystals for Second Harmonic Generation |
Dispersion-Compensating Mirrors, 650 - 1050 nm |
Dispersion-Compensating Prisms, 700 - 900 nm |
| Posted Comments: | |
Marta Arias Velasco
(posted 2023-05-03 10:21:51.43) Dear. service manager Hi, I'm a PhD student at Politecnico di Milano. I need information about the Damage Threshold of the mirror CM508-1000-P01. I appreciate any help you can provide. Best jdelia
(posted 2023-05-03 01:53:21.0) Thank you for contacting Thorlabs. Our specified damage threshold for our -P01 coated mirrors is as follows: 0.225 J/cm2 (800 nm, 99 fs, 1 kHz, Ø0.167 mm) and 1 J/cm2 (1064 nm, 10 ns, 10 Hz, Ø1.010 mm) for pulsed sources, as well as 500 W/cm (1.07 µm, Ø0.974 mm) and 1500 W/cm (10.6 µm, Ø0.339 mm) for CW sources. 任 骥
(posted 2020-10-20 01:37:00.387) what is the focal length tolerance(or euqvialently, radius of curvature tolerance) for concave mirrors? I'm intersted in 4 possible scenarios: f=150mm(diam.=1 ich), 200mm(diam.=1inch & 2inch) ,300mm(diam.>30mm)
Thanks in advance. YLohia
(posted 2020-10-20 11:24:45.0) Thank you for contacting Thorlabs. The radii of curvatures of these mirrors have a tolerance of +/- 0.2%. Hangchan Jo
(posted 2020-08-18 05:28:41.39) Dear. service manager
Hi, I'm Hangchan, a Ph.D. student at Inha University in South Korea.
I need .ZMX files of the concave mirrors to design optical systems.
Although you provide some .ZMX files of the lens, I can't find concave mirrors' design files.
I look forward to being provided with what I need.
Best regards
Hangchan YLohia
(posted 2020-09-24 03:54:44.0) Hello Hangchan, thank you for contacting Thorlabs. What specific mirror are you looking for the Zemax files of? I had reached out to you at the time of your original posting, but I never heard back. If you still need this information, please email us at techsupport@thorlabs.com. benju
(posted 2019-02-23 06:18:51.807) It would be great if this one was offered with f = 300 mm as well. nbayconich
(posted 2019-02-26 11:03:46.0) Thank you for contacting Thorlabs. We can provide custom version of these mirrors upon request. I will reach out to you directly with more information about our custom capabilities. cbrideau
(posted 2016-09-20 12:36:25.863) Any chance of getting a 75mm silver mirror with a 250mm focal length? Is Ultrafast Protected Silver a possible coating option? If you can do this focal length please quote. jlow
(posted 2016-09-21 04:55:06.0) Response from Jeremy at Thorlabs: We will contact you directly about the quote. germantiunov
(posted 2015-08-20 10:18:29.973) Good day!
Do this mirror (CM750-075-P01) withstand laser beam with diameter 2 mm and power 700 W?
Thanks, German Tiunov jlow
(posted 2015-08-25 04:03:04.0) Response from Jeremy at Thorlabs: The damage threshold for the mirror is listed on the website as 1750 W/cm at 1.064µm (Ø0.044mm beam size) and 1500 W/cm at 10.6µm (Ø0.339mm beam size). 700W with Ø2mm beam size would equate to >3500W/cm which will damage the mirror. user
(posted 2013-03-04 10:23:18.16) specified for use 450-20um, but the graphs only show up to 2.6um sharrell
(posted 2013-03-05 17:08:00.0) A Response from Sean at Thorlabs: Thank you for your feedback. Our optics team is working on scanning these mirrors over a wider wavelength range and we will update our webpage with the data as soon as it is available. We do not have your email address, but if you wish to have the data emailed to you when it is available, please contact us via email at techsupport@thorlabs.com. |
Click on a particular graphed line or the corresponding name in the legend to view concave mirrors with that coating option.
Metallic-Coated Concave Mirrors are available in UV Enhanced Aluminum, Aluminum, Silver, and Gold.
Concave Dielectric Coated Mirrors
Click to Enlarge
Raw Data
Reflectance of -E02 Dielectric-Coated Concave Mirrors at 8° AOI.
These mirrors are also available with a Back Side Polish.
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Click to Enlarge
Raw Data
Reflectance of -E03 Dielectric-Coated Concave Mirrors at 6° AOI.
These mirrors are also available with a Back Side Polish.
Concave Crystalline Coating Mirrors
| Item # | Focal Length | Center Thickness | Edge Thickness | Radius of Curvature | Surface Irregularity | Thickness Tolerance | Reference Drawing |
|---|---|---|---|---|---|---|---|
| CM127-010-P01 | 9.5 mm | 3.0 mm | 4.0 mm | 19.0 mm (0.75") | λ/4 @ 633 nm | ±0.2 mm |  |
| CM127-012-P01 | 12.0 mm | 3.8 mm | 24.0 mm (0.94") | ||||
| CM127-025-P01 | 25.0 mm | 3.4 mm | 50.0 mm (1.97") | ||||
| CM127-050-P01 | 50.0 mm | 3.2 mm | 100.0 mm (3.94") |
| Item # | Focal Length | Center Thickness | Edge Thickness | Radius of Curvature | Surface Irregularity | Thickness Tolerance | Reference Drawing |
|---|---|---|---|---|---|---|---|
| CM254-019-P01 | 19.0 mm | 6.0 mm | 8.1 mm | 38.0 mm (1.50") | λ/4 @ 633 nm | ±0.2 mm | |
| CM254-025-P01 | 25.0 mm | 7.6 mm | 50.0 mm (1.97") | ||||
| CM254-050-P01 | 50.0 mm | 6.8 mm | 100.0 mm (3.94") | ||||
| CM254-075-P01 | 75.0 mm | 6.5 mm | 150.0 mm (5.91") | ||||
| CM254-100-P01 | 100.0 mm | 6.4 mm | 200.0 mm (7.87") | ||||
| CM254-150-P01 | 150.0 mm | 6.3 mm | 300.0 mm (11.81") | ≤λ/4 @ 633 nm | ±0.1 mm | ||
| CM254-200-P01 | 200.0 mm | 6.2 mm | 400.0 mm (15.75") | ||||
| CM254-250-P01 | 250.0 mm | 6.2 mm | 500.0 mm (19.69") | ||||
| CM254-500-P01 | 500.0 mm | 6.1 mm | 1000.0 mm (39.37") | ||||
| CM254-750-P01 | 750.0 mm | 6.1 mm | 1500.0 mm (59.06") | ||||
| CM254-1000-P01 | 1000.0 mm | 6.0 mm | 2000.0 mm (78.74") |
| Item # | Focal Length | Center Thickness | Edge Thickness | Radius of Curvature | Surface Irregularity | Thickness Tolerance | Reference Drawing |
|---|---|---|---|---|---|---|---|
| CM508-038-P01 | 38.1 mm | 9.0 mm | 13.3 mm | 76.2 mm (3.00") | λ/4 @ 633 nm | ±0.2 mm | |
| CM508-050-P01 | 50.0 mm | 12.2 mm | 100.0 mm (3.94") | ||||
| CM508-100-P01 | 100.0 mm | 10.6 mm | 200.0 mm (7.87") | ||||
| CM508-150-P01 | 150.0 mm | 10.1 mm | 300.0 mm (11.81") | ||||
| CM508-200-P01 | 200.0 mm | 9.8 mm | 400.0 mm (15.75") | ||||
| CM508-500-P01 | 500.0 mm | 9.3 mm | 1000.0 mm (39.37") | ≤λ/4 @ 633 nm | ±0.1 mm | ||
| CM508-750-P01 | 750.0 mm | 9.2 mm | 1500.0 mm (59.06") | ||||
| CM508-1000-P01 | 1000.0 mm | 9.2 mm | 2000.0 mm (78.74") |
| Item # | Focal Length | Center Thickness | Edge Thickness | Radius of Curvature | Surface Irregularity | Thickness Tolerance | Reference Drawing |
|---|---|---|---|---|---|---|---|
| CM750-056-P01 | 56.25 mm | 12.0 mm | 18.4 mm | 112.5 mm (4.43") | λ/4 @ 633 nm | ±0.2 mm | |
| CM750-075-P01 | 75.0 mm | 16.7 mm | 150.0 mm (5.91") | ||||
| CM750-150-P01 | 150.0 mm | 14.3 mm | 300.0 mm (11.81") | ||||
| CM750-200-P01 | 200.0 mm | 13.7 mm | 400.0 mm (15.75") | ||||
| CM750-500-P01 | 500.0 mm | 12.7 mm | 1000.0 mm (39.37") |
Silver-Coated Concave Mirrors