0801319-A1 is referenced by 43 patents and cites 7 patents.

Mircolenses 3a and 3b are formed on a first surface of a transparent substrate, and an output efficiency control device 2 which modulates a light amount of incident light is provided on a second surface opposing the first surface. Incident light 4 is made to be incident obliquely to an optical axis of the mircolens 3a to be focused on the output efficiency control device 2. The output efficiency control device 2 modulates a light amount of incident light and outputs the light as outgoing light 5 through the mircolens 3b. Because of such a structure, the output efficiency control device 2 can be decreased in size, compared with a diameter of a beam and an aperture of a mircolens.

Title
Outgoing efficiency control device, projection type display apparatus
Application Number
EP19960935518 19961031
Publication Number
0801319 (A1)
Application Date
October 31, 1996
Publication Date
October 15, 1997
Inventor
Yokoyama Kazuo
JP
Ito Tatsuo
JP
Ueda Michihito
JP
Shiono Teruhiro
JP
Assignee
Matsushita Electric
JP
IPC
G02B 26/08
G02B 26/06
G02B 26/04
G02B 26/02
G01J 01/08
G01J 01/06
G01J 01/04
G01J 01/02
G01J 01/00
G02B 26/00
G02F 01/01
G02B 03/00
G02F 01/01
G02B 03/00
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