Optical system including a reflecting polarizer for a rear proje

Details Optical system including a reflecting polarizer for a rear proje Optical system including a reflecting polarizer for a rear proje

1995-01-26

1996-09-17

Metjahic, Safet

Television

Video display

Projection device

348782, 348756, H04N 574

Patent

active

055573436

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.

REFERENCES:
patent: 4556913 (1985-12-01), VanBreemen et al.
patent: 4621293 (1986-11-01), Matis
patent: 5084807 (1992-01-01), McKechnie et al.
patent: 5105265 (1992-04-01), Sato et al.
European Search Report dated Nov. 28, 1995.

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