04851882 is referenced by 45 patents and cites 10 patents.

An illumination optical system including an optical system effective to direct light from a light source to a surface to be illuminated, and an optical unit disposed in a path of the light defined by the optical system, the optical unit having a variable refracting power which is variable in accordance with the size of the surface to be illuminated.

Title
Illumination optical system
Application Number
936748
Publication Number
4851882
Application Date
November 4, 1988
Publication Date
July 25, 1989
Inventor
Akiyoshi Suzuki
Tokyo
JP
Kazuhiro Takahashi
Kawasaki
JP
Agent
Fitzpatrick Cella Harper & Scinto
Assignee
Canon Kabushiki Kaisha
JP
IPC
G03B 27/44
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