Wavelength selective optical reflector with integral light trap
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United States of America Patent
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Issued Date -
Jun 27, 2002
app pub date -
Dec 22, 2000
filing date -
Dec 22, 2000
priority date (Note) -
Abandoned
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Abstract
The invention is an optical device which reflects and absorbs light emitted from a light source with the reflected light being a selected wavelength range and the absorbed light being outside the selected wavelength range and a microwave excited discharge lamp. An optical device in accordance with the invention includes a light trap having a plurality of light absorbing surfaces, each light absorbing surface absorbing at least a part of incident light outside the selected wavelength range, the incident light striking an initial light absorbing area and being reflected from the initial light absorbing area to at least a secondary light absorbing area of one of the light absorbing surfaces, and a layer, fixed between the light trap and the light source, which passes the light outside the selected wavelength range to the light trap for absorption therein and which reflects the light within the selected wavelength range to a target area.
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