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"
Please Wait
Common Specifications | |
---|---|
Available Diameters | 1/2", 1", 2", and 75 mm |
Metallic Coating Range | 450 - 20 µm; Ravg > 97.5% from 450 nm - 2 µm; Ravg > 96% 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 |
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 >96% average reflectance in the spectral range from 2 - 20 µm and >97.5% 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 | |||||
---|---|---|---|---|---|
355 - 445 nm | 460 - 590 nm | 700 - 930 nm | 950 - 1170 nm | 1400 - 1700 nm | 1760 - 2250 nm |
Metallic Mirrors | Dielectric Mirror | High-Power Mirrors for Picosecond Lasers |
||
---|---|---|---|---|
Ultrafast-Enhanced Silver Mirrors, 750 - 1000 nm |
Protected Silver Mirrors, 450 nm - 20 µm |
Unprotected Gold Mirrors, 800 nm - 20 µm |
Dual-Band Dielectric Mirror, 400 nm and 800 nm |
Ytterbium Laser Line Mirrors, 250 nm - 1080 nm |
Dispersion-Compensating Optics | Low-GDD Harmonic Beamsplitters |
Deterministic GDD Beamsplitters |
|
---|---|---|---|
Dispersion-Compensating Mirrors, 650 - 1050 nm |
Dispersion-Compensating Prisms, 700 - 900 nm |
Harmonic Beamsplitters, 400 nm and 800 nm or 500 nm and 1000 nm |
Beamsplitters & Windows, 600 - 1500 nm or 1000 - 2000 nm |
Posted Comments: | |
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. |
Concave Mirrors Options | |
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Mirror Type | High-Reflectance Coating Wavelength |
UV Enhanced Aluminum | 250 - 450 nm |
Aluminum | 450 nm - 20 µm |
Silver | 450 nm - 20 µm |
Gold | 800 nm - 20 µm |
E01 Dielectric | 350 - 400 nm |
E02 Dielectric | 400 - 750 nm |
E02 Dielectric, Back Side Polished | |
E03 Dielectric | 750 - 1100 nm |
E03 Dielectric, Back Side Polished | |
E04 Dielectric | 1280 - 1600 nm |
Crystalline | 1064 or 1550 nm |
Concave Mirror Selection Guide
Thorlabs offers concave mirrors with both metallic and dielectric stack reflective coatings. Metallic-coated mirrors offer relatively high reflectivity (90-95%) over a wide wavelength range, while dielectric-coated mirrors provide even higher reflectivity (>99%) but over a smaller wavelength range. See the table to the right for an overview of the various coatings we offer for our concave mirrors. All coating options are available on optics with diameters ranging from Ø1/2" to Ø75 mm. Metallic mirrors are available with focal lengths from 9.5 - 1000 mm, while dielectric mirrors are available with focal lengths from 12 - 1000 mm.
Below are reflectivity plots for our metallic- and dielectric-coated concave mirrors. To view our selection of mirrors available with a particular coating, either click on the graphed line of interest or the corresponding coating name in the legend. Graphs are shown for an angle of incidence (AOI) of 8 degrees, which is the recommended angle at which to use a concave mirror.
Click on a particular graphed line or the corresponding name in the legend to view concave mirrors with that coating option.