Polarization conversion dichroic mirror and a liquid crystal projector
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United States of America Patent
Stats
-
Jan 23, 2001
Grant Date -
N/A
app pub date -
Jun 17, 1999
filing date -
Jun 22, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A mirror is provided with, from the incident side, a dichroic surface, a quarter-wave plate, and a reflecting surface. The dichroic surface transmits a light component covering a specific wavelength range and reflects light components covering other wavelength ranges. The quarter-wave plate is for rotating a polarization the specific wavelength range covered by the light component transmitted through the dichroic surface. The reflecting surface reflects the light component having passed through the quarter-wave plate to direct it back to the quarter-wave plate.
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