POLARIZATION-MAINTAINING MODULE FOR MAKING OPTICAL SYSTEMS POLARIZATION-INDEPENDENT
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United States of America Patent
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Issued Date -
Jul 24, 2014
app pub date -
Aug 30, 2012
filing date -
Sep 2, 2011
priority date (Note) -
Abandoned
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Abstract
Polarization compensation in optical system having a primary optical element having polarization-altering characteristics, such as a dichroic element, is provided. A compensation optical element having substantially the same polarization-altering characteristics as the primary optical element is provided in the path of the light beam whose polarization state is to be conserved. The compensation optical element is oriented with respect to the light beam such that by transmitting or reflecting the light beam, it alters its polarization state in a manner opposite to the altering of this polarization state by the primary optical element. Advantageously, this is true for any orientation of the polarization state of the light beam.
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