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Concave Mirrors: Visible Dielectric Coating (400 - 750 nm)


  • Focal Lengths from 12 - 500 mm
  • Ø1/2", Ø1", Ø2", or Ø75 mm
  • Dielectric Coating for 400 - 750 nm
  • No Chromatic Aberration Introduced

CM750-150-E02

Ø75 mm

CM508-150-E02

Ø2"

CM254-100-E02

Ø1"

CM127-050-E02

Ø1/2"

Focus Polychromatic
Beams without
Chromatic Aberration

Related Items


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Common Specifications
Avaliable Diameters 1/2", 1", 2", and 75 mm
Dielectric Coating Range 400 - 750 nm; Ravg >99%
Clear Aperture >90% of Diameter
Surface Quality 20-10 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
Dielectric Concave Mirrors Selection Guide
UV (350 - 400 nm) VIS (400 - 750 nm)
NIR (750 - 1100 nm) Telecom (1280 - 1600 nm)

See the Concave Mirror Guide tab, above, for our complete selection of concave mirrors.

Features

  • Dielectric Coating Range: 400 - 750 nm (-E02)
  • >99% Average Reflectivity in Dielectric Coating Range
  • Four Diameter Options: 1/2", 1", 2", or 75 mm
  • Focal Lengths Range from 12 mm - 500 mm

Thorlabs' Broadband Dielectric 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.

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

Thorlabs also offers metallic concave mirrors that operate over a broader wavelength range at the expense of lower reflectivity. Please contact Tech Support for custom versions of these optics.

Optical Coatings and Substrates
Optic Cleaning Tutorial

These plots show the reflectivity of our -E02 dielectric coating for a typical coating run. The shaded region in each graph denotes the spectral range over which the coating is highly reflective. Due to variations in each run, this recommended spectral range is narrower than the actual range over which the optic will be highly reflective. If you have any concerns about the interpretation of this data, please contact Tech Support. For applications that require a mirror that bridges the spectral range between two dielectric coatings, please consider a metallic concave mirror.

Excel Spreadsheet with Raw Data for -E02 Coating, 8° and 45° AOI


Posted Comments:
marcosousa011  (posted 2016-09-22 12:39:26.467)
hello, i have bought the folowing product: CM750-500-E02 - Ø75 mm Dielectric-Coated Concave Mirror, 400 - 750 nm, f = 500 mm. I would like to know the error (+/-) of the focal distance (f).
jlow  (posted 2016-09-23 10:11:01.0)
Response from Jeremy at Thorlabs: The focal length tolerance is ±0.1mm.
rthalman  (posted 2013-12-05 13:18:45.903)
Is it possible to have you polish the back side of these instead of engraving it and putting the rough finish on? I would like to use it for a Cavity Enhanced spectroscopy instrument. Ryan Thalman Research Associate Brookhaven National Lab.
tcohen  (posted 2013-12-05 08:56:27.0)
Response from Tim at Thorlabs to Ryan: Thanks for your inquiry! We can provide customs such as this through our technical team at techsupport@thorlabs.com. An applications engineer will contact you with a quote and to discuss your transmission requirements.
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" Broadband Dielectric Concave Mirrors (400 - 750 nm)

Item # Focal Length Center Thickness Edge Thickness Radius of Curvature Surface Irregularity Thickness Tolerance Reference Drawing
CM127-012-E02 12 mm 3.0 mm 3.8 mm 24.0 mm (0.94") λ/4 @ 633 nm ±0.2 mm Concave Mirror Drawing
CM127-025-E02 25 mm 3.4 mm 50.0 mm (1.97")
CM127-050-E02 50 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
CM127-012-E02 Support Documentation
CM127-012-E02Ø1/2" Dielectric-Coated Concave Mirror, 400 - 750 nm, f = 12 mm
$56.36
Today
CM127-025-E02 Support Documentation
CM127-025-E02Ø1/2" Dielectric-Coated Concave Mirror, 400 - 750 nm, f = 25 mm
$56.36
Today
CM127-050-E02 Support Documentation
CM127-050-E02Ø1/2" Dielectric-Coated Concave Mirror, 400 - 750 nm, f = 50 mm
$56.36
Today

Ø1" Broadband Dielectric Concave Mirrors (400 - 750 nm)

Item # Focal Length Center Thickness Edge Thickness Radius of Curvature Surface Irregularity Thickness Tolerance Reference Drawing
CM254-025-E02 25 mm 6.0 mm 7.6 mm 50.0 mm (1.97") λ/4 @ 633 nm ±0.2 mm Concave Mirror Drawing
CM254-050-E02 50 mm 6.8 mm 100.0 mm (3.94")
CM254-075-E02 75 mm 6.5 mm 150.0 mm (5.91")
CM254-100-E02 100 mm 6.4 mm 200.0 mm (7.87")
CM254-150-E02 150 mm 6.3 mm 300.0 mm (11.81") ≤λ/4 @ 633 nm ±0.1 mm
CM254-200-E02 200 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
CM254-025-E02 Support Documentation
CM254-025-E02Ø1" Dielectric-Coated Concave Mirror, 400 - 750 nm, f = 25 mm
$80.33
Today
CM254-050-E02 Support Documentation
CM254-050-E02Ø1" Dielectric-Coated Concave Mirror, 400 - 750 nm, f = 50 mm
$80.33
Today
CM254-075-E02 Support Documentation
CM254-075-E02Ø1" Dielectric-Coated Concave Mirror, 400 - 750 nm, f = 75 mm
$80.33
Today
CM254-100-E02 Support Documentation
CM254-100-E02Ø1" Dielectric-Coated Concave Mirror, 400 - 750 nm, f = 100 mm
$80.33
Today
CM254-150-E02 Support Documentation
CM254-150-E02NEW!Customer Inspired! Ø1" Dielectric-Coated Concave Mirror, 400 - 750 nm, f = 150 mm
$80.33
Today
CM254-200-E02 Support Documentation
CM254-200-E02NEW!Customer Inspired! Ø1" Dielectric-Coated Concave Mirror, 400 - 750 nm, f = 200 mm
$80.33
Today

Ø2" Broadband Dielectric Concave Mirrors (400 - 750 nm)

Item # Focal Length Center Thickness Edge Thickness Radius of Curvature Surface Irregularity Thickness Tolerance Reference Drawing
CM508-050-E02 50 mm 9.0 mm 12.2 mm 100.0 mm (3.94") λ/4 @ 633 nm ±0.2 mm Concave Mirror Drawing
CM508-100-E02 100 mm 10.6 mm 200.0 mm (7.87")
CM508-150-E02 150 mm 10.1 mm 300.0 mm (11.81")
CM508-200-E02 200 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
CM508-050-E02 Support Documentation
CM508-050-E02Ø2" Dielectric-Coated Concave Mirror, 400 - 750 nm, f = 50 mm
$119.34
Today
CM508-100-E02 Support Documentation
CM508-100-E02Ø2" Dielectric-Coated Concave Mirror, 400 - 750 nm, f = 100 mm
$119.34
Today
CM508-150-E02 Support Documentation
CM508-150-E02Ø2" Dielectric-Coated Concave Mirror, 400 - 750 nm, f = 150 mm
$119.34
Today
CM508-200-E02 Support Documentation
CM508-200-E02Ø2" Dielectric-Coated Concave Mirror, 400 - 750 nm, f = 200 mm
$119.34
Today

Ø75 mm Broadband Dielectric Concave Mirrors (400 - 750 nm)

Item # Focal Length Center Thickness Edge Thickness Radius of Curvature Surface Irregularity Thickness Tolerance Reference Drawing
CM750-075-E02 75 mm 12.0 mm 16.7 mm 150.0 mm (5.91") λ/4 @ 633 nm ±0.2 mm Concave Mirror Drawing
CM750-150-E02 150 mm 14.3 mm 300.0 mm (11.81")
CM750-200-E02 200 mm 13.7 mm 400.0 mm (15.75")
CM750-500-E02 500 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
CM750-075-E02 Support Documentation
CM750-075-E02Ø75 mm Dielectric-Coated Concave Mirror, 400 - 750 nm, f = 75 mm
$186.66
Today
CM750-150-E02 Support Documentation
CM750-150-E02Ø75 mm Dielectric-Coated Concave Mirror, 400 - 750 nm, f = 150 mm
$186.66
Today
CM750-200-E02 Support Documentation
CM750-200-E02Ø75 mm Dielectric-Coated Concave Mirror, 400 - 750 nm, f = 200 mm
$186.66
Today
CM750-500-E02 Support Documentation
CM750-500-E02Ø75 mm Dielectric-Coated Concave Mirror, 400 - 750 nm, f = 500 mm
$186.66
Today
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