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"

Related Items


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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)
  • Click Link for Detailed Specifications on the Substrate
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.

Optical Coatings and Substrates
Optic Cleaning Tutorial

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.

-P01 Protected Silver at Near-Normal Incident Angle
Click to Enlarge

Excel Spreadsheet with Raw Data for -P01 Protected Silver Coating

-P01 Protected Silver at 45 Degree Incident Angle
Click to Enlarge

Excel Spreadsheet with Raw Data for -P01 Protected Silver Coating

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.

Concave Mirrors Options
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 nm, 1156 nm, 1397 nm, 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 reflectance (90-95%) over a wide wavelength range, while dielectric-coated mirrors provide even higher reflectance (>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 reflectance plots for our metallic-, dielectric-, and crystalline-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 for the matallic- and dielectrc-coated mirrors are shown for an angle of incidence (AOI) of 8 or 6 degrees. Graphs for the crystalline-coated mirrors are shown for an AOI of 0 degrees.

Metallic Concave Mirror 8 AOI Reflectivity
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.

UV Aluminum (F01) Aluminum (G01) Silver (P01) Gold (M01) UV Aluminum (F01) Aluminum (G01) Silver (P01) Gold (M01)


Concave Dielectric Coated Mirrors

-E02 Coating Range, 8° AOI
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.
-E04 Coating Range, 6° AOI
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 

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Ø1/2" Protected Silver-Coated Concave Mirrors: 450 nm - 20 µm

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 Concave Mirror Drawing
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")
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
CM127-010-P01 Support Documentation
CM127-010-P01Ø1/2" Silver-Coated Concave Mirror, f = 9.5 mm
$43.36
Today
CM127-012-P01 Support Documentation
CM127-012-P01Customer Inspired! Ø1/2" Silver-Coated Concave Mirror, f = 12.0 mm
$43.36
Today
CM127-025-P01 Support Documentation
CM127-025-P01Customer Inspired! Ø1/2" Silver-Coated Concave Mirror, f = 25.0 mm
$43.36
Today
CM127-050-P01 Support Documentation
CM127-050-P01Customer Inspired! Ø1/2" Silver-Coated Concave Mirror, f = 50.0 mm
$43.36
Today
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Ø1" Protected Silver-Coated Concave Mirrors: 450 nm - 20 µm

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 Concave Mirror Drawing
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")
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
CM254-019-P01 Support Documentation
CM254-019-P01Ø1" Silver-Coated Concave Mirror, f = 19.0 mm
$66.24
Today
CM254-025-P01 Support Documentation
CM254-025-P01Customer Inspired! Ø1" Silver-Coated Concave Mirror, f = 25.0 mm
$66.24
Today
CM254-050-P01 Support Documentation
CM254-050-P01Customer Inspired! Ø1" Silver-Coated Concave Mirror, f = 50.0 mm
$66.24
Today
CM254-075-P01 Support Documentation
CM254-075-P01Customer Inspired! Ø1" Silver-Coated Concave Mirror, f = 75.0 mm
$66.24
Today
CM254-100-P01 Support Documentation
CM254-100-P01Customer Inspired! Ø1" Silver-Coated Concave Mirror, f = 100.0 mm
$66.24
Today
CM254-150-P01 Support Documentation
CM254-150-P01Customer Inspired! Ø1" Silver-Coated Concave Mirror, f = 150.0 mm
$66.24
Lead Time
CM254-200-P01 Support Documentation
CM254-200-P01Customer Inspired! Ø1" Silver-Coated Concave Mirror, f = 200.0 mm
$66.24
Today
CM254-250-P01 Support Documentation
CM254-250-P01Customer Inspired! Ø1" Silver-Coated Concave Mirror, f = 250.0 mm
$66.24
Today
CM254-500-P01 Support Documentation
CM254-500-P01Customer Inspired! Ø1" Silver-Coated Concave Mirror, f = 500.0 mm
$66.24
Today
CM254-750-P01 Support Documentation
CM254-750-P01Customer Inspired! Ø1" Silver-Coated Concave Mirror, f = 750.0 mm
$66.24
Today
CM254-1000-P01 Support Documentation
CM254-1000-P01Customer Inspired! Ø1" Silver-Coated Concave Mirror, f = 1000.0 mm
$66.24
Today
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Ø2" Protected Silver-Coated Concave Mirrors: 450 nm - 20 µm

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 Concave Mirror Drawing
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")
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
CM508-038-P01 Support Documentation
CM508-038-P01Ø2" Silver-Coated Concave Mirror, f = 38.1 mm
$128.52
Today
CM508-050-P01 Support Documentation
CM508-050-P01Customer Inspired! Ø2" Silver-Coated Concave Mirror, f = 50.0 mm
$128.52
Today
CM508-100-P01 Support Documentation
CM508-100-P01Customer Inspired! Ø2" Silver-Coated Concave Mirror, f = 100.0 mm
$128.52
Today
CM508-150-P01 Support Documentation
CM508-150-P01Customer Inspired! Ø2" Silver-Coated Concave Mirror, f = 150.0 mm
$128.52
Today
CM508-200-P01 Support Documentation
CM508-200-P01Customer Inspired! Ø2" Silver-Coated Concave Mirror, f = 200.0 mm
$128.52
Today
CM508-500-P01 Support Documentation
CM508-500-P01Customer Inspired! Ø2" Silver-Coated Concave Mirror, f = 500.0 mm
$128.52
7-10 Days
CM508-750-P01 Support Documentation
CM508-750-P01Customer Inspired! Ø2" Silver-Coated Concave Mirror, f = 750.0 mm
$128.52
7-10 Days
CM508-1000-P01 Support Documentation
CM508-1000-P01Customer Inspired! Ø2" Silver-Coated Concave Mirror, f = 1000.0 mm
$128.52
Today
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Ø75 mm Protected Silver-Coated Concave Mirrors: 450 nm - 20 µm

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 Concave Mirror Drawing
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")
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
CM750-056-P01 Support Documentation
CM750-056-P01Ø75 mm Silver-Coated Concave Mirror, f = 56.25 mm
$203.49
Today
CM750-075-P01 Support Documentation
CM750-075-P01Customer Inspired! Ø75 mm Silver-Coated Concave Mirror, f = 75.0 mm
$203.49
Today
CM750-150-P01 Support Documentation
CM750-150-P01Customer Inspired! Ø75 mm Silver-Coated Concave Mirror, f = 150.0 mm
$203.49
Today
CM750-200-P01 Support Documentation
CM750-200-P01Customer Inspired! Ø75 mm Silver-Coated Concave Mirror, f = 200.0 mm
$203.49
Today
CM750-500-P01 Support Documentation
CM750-500-P01Customer Inspired! Ø75 mm Silver-Coated Concave Mirror, f = 500.0 mm
$203.49
Today