0395156-A1 is referenced by 38 patents and cites 3 patents.

An efficient illumination system for an image projection apparatus is described, which system comprises a radiation source (20), a concave reflector (21) and a first and a second lens plate (25, 28) each being provided with a matrix of lenses (26, 29) for forming superimposed images of the radiation source on the object (1) to be illuminated, the aspect ratio of the lenses (26, 29) corresponding to that of the object (1).

Title
Optical illumination system and projection apparatus comprising such a system.
Application Number
EP19900201000 19900423
Publication Number
0395156 (A1)
Application Date
April 23, 1990
Publication Date
October 31, 1990
Inventor
Timmers Wilhelmus A G
NL
Brandt Adrianus H J Van Den
NL
Assignee
Koninkl Philips Electronics
NL
IPC
G03B 21/00
G02B 03/00
G03B 33/00
G03B 21/20
G03B 21/14
G03B 21/00
G02B 03/00
G02B 19/00
G03B 33/12
G03B 21/20
G03B 21/14
G03B 21/00
G02B 03/00
G02B 19/00
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