Coatings 
Metallic Reflectors
Aluminum
Al-SiO, Al-MgF2, Enhanced Aluminum
Bare aluminum provides excellent reflectivity from the UV to the IR. Unfortunately, it also oxidizes rapidly and use of a dielectric overcoat is usually required to prevent degradation. Since no overcoat is ideal for all applications, materials best suited to the intended application should be chosen.
Aluminum-Silicon Monoxide (AL SIO)
Benefits
- General purpose Aluminum coating for use in the visible spectrum
- Inexpensive
Trade-Offs
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Reflectivity
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>85% average, 400-800nm
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Wavelength Range
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350nm to 3000nm
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Substrates
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Fused Quartz/Fused Silica (all grades)
BK7 Optical Glass
Pyrex®/Zerodur®
Other materials upon request
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Durability
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Per MIL-C-48497A
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Order As
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AL SIO
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Please Specify
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Substrate Material/Part Number
Surface(s) to be coated
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Aluminum-Magnesium Fluoride (AL MGF2)
Benefits
- General purpose Aluminum coating for use in the UV and visible spectra.
- Relatively inexpensive
Trade-Offs
- Very poor durability, special care must be taken while handling or cleaning
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Reflectivity
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>85% average, 200-800nm
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Wavelength Range
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200nm to 3000nm
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Substrates
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Fused Quartz/Fused Silica (all grades)
BK7 Optical Glass
Pyrex®/Zerodur®
Other materials upon request
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Durability
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Per MIL-C-48497A
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Order As
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AL MGF2
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Please Specify
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Substrate Material/Part Number
Surface(s) to be coated
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Enhanced Aluminum (AL ENH)
Benefits
- Special Aluminum coating for higher reflectivity in the visible spectrum.
Trade-Offs
- Poor out-of-band reflectivity
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Reflectivity
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>93% average, 450-750nm
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Wavelength Range
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400nm to 800nm
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Substrates
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Fused Quartz/Fused Silica (all grades)
BK7 Optical Glass
Pyrex®/Zerodur®
Other materials upon request
|
|
Durability
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Per MIL-C-48497A
|
|
Order As
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AL ENH
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|
Please Specify
|
Substrate Material/Part Number
Surface(s) to be coated
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