WIDE ANGLE MIRROR SYSTEM
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United States of America Patent
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Issued Date -
Feb 14, 2008
app pub date -
Mar 27, 2007
filing date -
Mar 31, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Composite mirror systems include a wideband thin film interference stack having a plurality of microlayers and an optically thick layer having a refractive index greater than air but less than the smallest refractive index of the stack. The mirror systems can provide high reflectivity for light propagating in the stack and in the optically thick layer at supercritical angles, while avoiding degradation in reflectivity if dirt or other disturbances such as absorbing materials are present at the mirror backside for example due to contact with a support structure.
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