OPTICAL ELEMENT, OPTICAL UNIT, AND PROJECTION DISPLAY APPARATUS FOR SWITCHING POLARIZATION DIRECTION
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United States of America Patent
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Issued Date -
Mar 3, 2011
app pub date -
Aug 26, 2010
filing date -
Aug 26, 2009
priority date (Note) -
Abandoned
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Abstract
Each of a first polarization separation element and a second polarization separation element reflects one of two polarization components perpendicular to each other included in incident light and transmits the other polarization component. A switching element is placed between the first polarization separation element and second polarization separation element and switches between a first state of transmitting an incident polarization component as it is and a second state of converting an incident polarization component to the other polarization component perpendicular to the incident polarization component and transmitting the converted component.
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