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OFR manufactures and maintains a stock of standard Front-Surface Mirrors, with opaque, vacuum-deposited metallic coatings on low-expansion glass substrates. These coatings are not intended for high-power laser applications.
Material Pyrex
Dimensions  

Diameter

+ 0 / - 0.1 mm

Thickness

± 0.1 mm

Parallel

< 5 minutes
Optical  

Flatness

1/4 - 1/10 wave

Polish

20/10

Rear Surface

Fine ground

Mirror Types

  • Ultraviolet (MU series Aluminum)
  • VIS-NIR (M series Aluminum)
  • Hard Gold (MR series Gold)
  • High Reflectance (MH series Aluminum)


Ultraviolet (MU series Aluminum)
This is an aluminum coating with a magnesium fluoride overcoat which protects the aluminum and enhances reflectivity for short wavelengths. This coating can be somewhat delicate, and care should be taken when cleaning.

Catalog
Number
Spectra
lRange
Dimensions
Coating/
Overcoat
Reflectance
Surface
Flatness
MU-25
160 nm - Far IR
1" dia. x "
Aluminum/MgF2
60-90%
-wave
MU-51
160 nm - Far IR
2" dia. x "
Aluminum/MgF2
60-90%
-wave

 


VIS-NIR (M series Aluminum)
This is the most common of the "aluminized" mirror coatings. It is an aluminum coating with a protective overcoat of SiO.

Catalog
Number
Spectral
Range
Dimensions
Coating/
Overcoat
Reflectance
Surface
Flatness
M-25
380 nm - Far IR
1" dia. x "
Aluminum/SiO
Above 86%
-wave
M-51
380 nm - Far IR
2" dia. x "
Aluminum/SiO
throughout
-wave
M-76
380 nm - Far IR
3" dia. x "
Aluminum/SiO
visible
-wave
M-102
380 nm - Far IR
4" dia. x "
Aluminum/SiO
spectrum
-wave
M-152
380 nm - Far IR
6" dia. x 1"
Aluminum/SiO
-wave

 


High Reflectance (MH series Aluminum)
Enhanced aluminum mirror. Dielectric overcoat enhances reflectivity in the VIS and IR.

Catalog
Number
Spectral
Range
Dimensions
Coating/
Overcoat
Reflectance
Surface
Flatness
MH-25
425 nm - Far IR
1" dia. x "
Aluminum/dielectric
Above 95%
-wave
MH-51
425 nm - Far IR
2" dia. x "
Aluminum/dielectric
Above 95%
-wave

 


Interferometric Quality Mirrors (MI series Aluminum)
Same coating as the above MH series mirror. Polished to 1/20 wave flatness for use with interferometric applications.

Catalog
Number
Spectral
Range
Dimensions
Coating/
overcoat
Reflectance
Surface
Flatness
MI-25
425 nm - Far IR
1" dia. x "
Aluminum/dielectric
Above 95%
1/20 -wave
MI-51
425 nm - Far IR
2" dia. x "
Aluminum/dielectric
Above 95%
1/20 -wave
MI-76
425 nm - Far IR
3" dia. x "
Aluminum/dielectric
Above 95%
1/20 -wave
MI-102
425 nm - Far IR
4" dia. x "
Aluminum/dielectric
Above 95%
1/20 -wave
MI-152
425 nm - Far IR
6" dia. x 1"
Aluminum/dielectric
Above 95%
1/20 -wave


Hard Gold (MR series Gold)
Hard gold coating with IR enhancing overcoat.

Catalog
Number
Spectral
Range
Dimensions
Coating/
Overcoat
Reflectance
Surface
Flatness
MR-25
700 nm - Far IR
1" dia. x "
Protected Gold
98.50%
-wave
MR-51
700 nm - Far IR
2" dia. x "
Protected Gold
98.50%
-wave

 

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