0467447-A1 is referenced by 18 patents and cites 3 patents.

An image projection apparatus is described, which comprises an illumination system (100, 101, 54, 57, 62) having a first, round lens plate (54) and a second, half-round lens plate (57). A combination of a special polarization-sensitive beam splitter (20) and a polarization rotator (31) is arranged in the path of the beam supplied by this system and converts the beam into two sub-beams having the same state of polarization which jointly illuminate a display panel (1) in a uniform manner and optimally fill the surface area of this panel and a subsequent projection lens system (C).

Title
Image projection apparatus.
Application Number
EP19910201744 19910705
Publication Number
0467447 (A1)
Application Date
July 5, 1991
Publication Date
January 22, 1992
Inventor
Van Den Brandt Adrianus Henric
NL
De Vaan Adrianus Johannes Step
NL
Assignee
Philips
NL
IPC
G02B 27/28
G02B 05/30
G09F 09/35
G03B 21/14
G03B 21/00
G02F 01/13
G02B 27/28
G02B 27/18
G02B 27/10
G09F 09/35
G03B 21/14
G03B 21/00
G02F 01/13
G02B 27/28
G02B 27/18
G02B 27/10
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