Light filter having a wedge-shaped profile
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United States of America Patent
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Aug 18, 2009
Grant Date -
Nov 13, 2008
app pub date -
May 11, 2007
filing date -
May 11, 2007
priority date (Note) -
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Abstract
A light filter includes exactly one partially reflective layer having a top and a bottom and a wedge-shaped profile defining a wedge direction. First and second transparent layers are disposed on the top and bottom, respectively, of the partially reflective layer, each transparent layer including at least two dielectric layers of two different materials, each dielectric layer having a wedge-shaped profile oriented in the wedge direction. A photospectrometer including a light filter with the wedge-shaped profile is also disclosed.
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