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Concave Mirrors: Protected Aluminum (450 nm - 20 µm)


  • Protected Aluminum Coating
  • Focal Lengths from 9.5 to 500 mm
  • Ø1/2", Ø1", Ø2", and Ø75 mm
  • No Chromatic Aberration Introduced

CM750-056-G01

Ø75 mm

CM127-010-G01

Ø1/2"

CM254-019-G01

Ø1"

CM508-200-G01

Ø2"

Focus Polychromatic
Beams without
Chromatic Aberration

Related Items


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Common Specifications
Available Diameters 1/2", 1", 2", and 75 mm
Metallic Coating Range 450 nm - 2 µm; Ravg > 90%
2 µm - 20 µm; Ravg > 95%
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.

Features

  • Protected Aluminum: 450 nm - 20 µm
  • Four Diameter Options: 1/2", 1", 2", or 75 mm
  • Focal Lengths Range from 9.5 mm - 500 mm

Thorlabs' Protected Aluminum-Coated Concave Mirrors are designed for light collection, imaging, and focusing applications. These reflective optics focus light without introducing chromatic aberration, making them especially suitable for broadband sources.

These mirrors offer >90% average reflection in the spectral range from 450 nm - 2 µm and >95% average reflection in
the spectral range from 2 - 20 µm. They consist of an aluminum-coated N-BK7 substrate that features a protective SiO2 overcoat. With ≤λ/4 surface irregularity at 633 nm, these mirrors provide excellent image quality. For applications near 780 nm, our silver-coated or -E03 dielectric mirrors are recommended instead.

All of the mirrors on this page can be mounted by our Precision Kinematic Mirror Mounts.

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 narrower wavelength range.

Optical Coatings Guide
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 Aluminum at Near-Normal Incident Angle
Click to Enlarge

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

Excel Spreadsheet with Raw Data for Protected Aluminum

Posted Comments:
user  (posted 2013-09-05 13:37:01.367)
It would be great if more focal lengths were offered (e.g. 1000-5000 mm). Same for convex mirrors (500-5000).
jlow  (posted 2013-09-11 09:09:00.0)
Response from Jeremy at Thorlabs: Thank you for your feedback. We will look into the possibility of offering more focal lengths.
cdaly  (posted 2013-01-25 17:32:17.833)
Response from Chris at Thorlabs: Thank you for using the web feedback. Yes, we would be able to offer uncoated substrates for the concave mirrors. I will contact you directly to discuss your requirements.
franxm  (posted 2013-01-25 13:23:21.263)
Would Thorlabs offer uncoated mirror substrates? Thanks.
sharrell  (posted 2012-08-06 14:30:00.0)
Response from Sean at Thorlabs: Thank you for your feedback. I am sorry that the mirror thickness is missing from our specs table. We are in the process of revising the way many of our optics specs are presented, and we have moved this page to the top of the list. We expect that an updated webpage will be available by the end of the week. In the meantime, the thickness is available on the pdf drawing available for each mirror by clicking on the red "Documents" icon next to each item number in the price box.
user  (posted 2012-08-04 18:57:10.0)
The thickness data seems to be missing, it is important for me to have this data when picking an optic, please consider adding it.
jjurado  (posted 2011-02-18 17:15:00.0)
Response from Javier at Thorlabs to Christian Roedel: Thank you for contacting us with your request. We can certainly offer our mirrors without the protective coating. We will contact you directly to get more details about your requirements.
christian.roedel  (posted 2011-02-17 12:15:17.0)
I would like to use these mirrors for simple XUV applications. Is it possible to get them without a protection overcoat? A plain gold coating would be necessary for my application.
acable  (posted 2007-07-23 13:06:16.0)
Overview text is not well written, for instance "insufficient anti-reflection coatings" is poorly worded, please rewrite the entire overview. Having a plot that is the result of an actual measurement would lend confidence to the reader, where the highly smoothed spectral curve does not. Had to try to submit twice, i couldn't tell the difference between "15" and "I5" for the security code, at least that is my guess as to why.
Concave Mirrors Coating Options
Coating Wavelength Range
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
E03 Dielectric 750 - 1100 nm
E04 Dielectric 1280 - 1600 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 - 500 mm.

Below are reflectivity plots for our complete line of 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.

Metallic Concave Mirror 8 AOI Reflectivity

Concave Dielectric Mirrors 8 Degrees AOI

Click on a particular graphed line or the corresponding name in the legend to view concave mirrors with that coating option.

E01 Dielectric Coating E02 Dielectric Coating E03 Dielectric Coating E04 Dielectric Coating E01 Dielectric Coating E02 Dielectric Coating E03 Dielectric Coating E04 Dielectric Coating

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

Ø1/2" Aluminum-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-G01 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-G01 12.0 mm 3.8 mm 24.0 mm (0.94")
CM127-025-G01 25.0 mm 3.4 mm 50.0 mm (1.97")
CM127-050-G01 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-G01 Support Documentation
CM127-010-G01Ø1/2" Aluminum-Coated Concave Mirror, f = 9.5 mm
$37.23
Today
CM127-012-G01 Support Documentation
CM127-012-G01Ø1/2" Aluminum-Coated Concave Mirror, f = 12.0 mm
$37.23
Today
CM127-025-G01 Support Documentation
CM127-025-G01Ø1/2" Aluminum-Coated Concave Mirror, f = 25.0 mm
$37.23
Today
CM127-050-G01 Support Documentation
CM127-050-G01Ø1/2" Aluminum-Coated Concave Mirror, f = 50.0 mm
$37.23
Today

Ø1" Aluminum-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-G01 19.0 mm 6.0 mm 8.1 mm 38.0 mm (1.5") λ/4 @ 633 nm ±0.2 mm Concave Mirror Drawing
CM254-025-G01 25.0 mm 7.6 mm 50.0 mm (1.97")
CM254-050-G01 50.0 mm 6.8 mm 100.0 mm (3.94")
CM254-075-G01 75.0 mm 6.5 mm 150.0 mm (5.91")
CM254-100-G01 100.0 mm 6.4 mm 200.0 mm (7.87")
CM254-150-G01 150.0 mm 6.3 mm 300.0 mm (11.81") ≤λ/4 @ 633 nm ±0.1 mm
CM254-200-G01 200.0 mm 6.2 mm 400.0 mm (15.75")
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
CM254-019-G01 Support Documentation
CM254-019-G01Ø1" Aluminum-Coated Concave Mirror, f = 19.0 mm
$56.87
Today
CM254-025-G01 Support Documentation
CM254-025-G01Ø1" Aluminum-Coated Concave Mirror, f = 25.0 mm
$56.87
Today
CM254-050-G01 Support Documentation
CM254-050-G01Ø1" Aluminum-Coated Concave Mirror, f = 50.0 mm
$56.87
Today
CM254-075-G01 Support Documentation
CM254-075-G01Ø1" Aluminum-Coated Concave Mirror, f = 75.0 mm
$56.87
Today
CM254-100-G01 Support Documentation
CM254-100-G01Ø1" Aluminum-Coated Concave Mirror, f = 100.0 mm
$56.87
Today
CM254-150-G01 Support Documentation
CM254-150-G01NEW!Customer Inspired! Ø1" Aluminum-Coated Concave Mirror, f = 150.0 mm
$56.87
Today
CM254-200-G01 Support Documentation
CM254-200-G01NEW!Customer Inspired! Ø1" Aluminum-Coated Concave Mirror, f = 200.0 mm
$56.87
Today

Ø2" Aluminum-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-G01 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-G01 50.0 mm 12.2 mm 100.0 mm (3.94")
CM508-100-G01 100.0 mm 10.6 mm 200.0 mm (7.87")
CM508-150-G01 150.0 mm 10.1 mm 300.0 mm (11.81")
CM508-200-G01 200.0 mm 9.8 mm 400.0 mm (15.75")
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
CM508-038-G01 Support Documentation
CM508-038-G01Ø2" Aluminum-Coated Concave Mirror, f = 38.1 mm
$85.43
Today
CM508-050-G01 Support Documentation
CM508-050-G01Ø2" Aluminum-Coated Concave Mirror, f = 50.0 mm
$85.43
Today
CM508-100-G01 Support Documentation
CM508-100-G01Ø2" Aluminum-Coated Concave Mirror, f = 100.0 mm
$85.43
Today
CM508-150-G01 Support Documentation
CM508-150-G01Ø2" Aluminum-Coated Concave Mirror, f = 150.0 mm
$85.43
Today
CM508-200-G01 Support Documentation
CM508-200-G01Ø2" Aluminum-Coated Concave Mirror, f = 200.0 mm
$85.43
Today

Ø75 mm Aluminum-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-G01 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-G01 75.0 mm 16.7 mm 150.0 mm (5.91")
CM750-150-G01 150.0 mm 14.3 mm 300.0 mm (11.81")
CM750-200-G01 200.0 mm 13.7 mm 400.0 mm (15.75")
CM750-500-G01 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-G01 Support Documentation
CM750-056-G01Ø75 mm Aluminum-Coated Concave Mirror, f = 56.25 mm
$163.20
Today
CM750-075-G01 Support Documentation
CM750-075-G01Ø75 mm Aluminum-Coated Concave Mirror, f = 75.0 mm
$163.20
Today
CM750-150-G01 Support Documentation
CM750-150-G01Ø75 mm Aluminum-Coated Concave Mirror, f = 150.0 mm
$163.20
Today
CM750-200-G01 Support Documentation
CM750-200-G01Ø75 mm Aluminum-Coated Concave Mirror, f = 200.0 mm
$163.20
Today
CM750-500-G01 Support Documentation
CM750-500-G01Ø75 mm Aluminum-Coated Concave Mirror, f = 500.0 mm
$163.20
Today
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