Optical system including a reflecting polarizer for a rear projection picture display apparatus
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United States of America Patent
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-
Sep 17, 1996
Grant Date -
N/A
app pub date -
Jan 26, 1995
filing date -
Jan 28, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An optical system for a rear projection picture display has reduced size while maintaining screen size. Two plane mirrors are provided along a light path between a picture display unit and a screen. The first plane mirror at a projection lens side is made of a reflecting polarizer and is located along a light path between the second plane mirror and the screen. The two plane mirrors are set in a relative angle so that the incident angle of the light traveling from the projection lens to the first plane mirror is large as compared with the incident angle of the light traveling from the second plane mirror to the first plane mirror. A polarizing plate is attached at the rear side of the screen.
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