Optical system for rear projection picture display apparatus

Details Optical system for rear projection picture display apparatus Optical system for rear projection picture display apparatus

G - Physics

03

B

G03B 27/18 (2006.01) G03B 21/10 (2006.01) G03B 21/28 (2006.01) H04N 5/74 (2006.01)

Patent

CA 2141238

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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