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- How is a MIRROR Without a Coating Handled?
How is a MIRROR Without a Coating Handled?
- By Mark Nicholson
- Published 30 January 2007
- Polarization and Thin Film Coatings , Frequently Asked Questions
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How is a MIRROR Without a Coating Handled?
Question: I have a MIRROR surface or object, but I have not defined a coating for it. How is its reflectivity accounted for?
Answer: If a surface or object has the material type MIRROR, and no coating is specified, then the surface is assumed to be coated with a thick layer of aluminum, with an index of refraction 0.7 - 7.0i. The aluminum layer is assumed to be thick enough that no light propagates past the layer.
This means that an uncoated mirror surface has a reflectivity of less than 1, just as an uncoated refractive surface has a transmission of less than 1.
Answer: If a surface or object has the material type MIRROR, and no coating is specified, then the surface is assumed to be coated with a thick layer of aluminum, with an index of refraction 0.7 - 7.0i. The aluminum layer is assumed to be thick enough that no light propagates past the layer.
This means that an uncoated mirror surface has a reflectivity of less than 1, just as an uncoated refractive surface has a transmission of less than 1.
1 Response to "How is a MIRROR Without a Coating Handled?" 
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said this on 17 May 2007 10:39:24 PM PDT
very good software
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