04373791 is referenced by 50 patents and cites 3 patents.

In a pupil divisional type focusing position detection apparatus of the type capable of detecting the infocus state of a taking lens based on a phase difference of output signals produced from at least one photosensor array for receiving rays of image formation light from the exit pupil of the taking lens, the focusing position detection accuracy can be changed as desired or in accordance with F-number of the taking lens.

Title
Focusing position detection apparatus
Application Number
6/122999
Publication Number
4373791
Application Date
February 20, 1980
Publication Date
February 15, 1983
Inventor
Kunihiko Araki
Tokyo
JP
Agent
Wyatt Gerber Shoup Scobey & Badie
Assignee
Ricoh Company
JP
IPC
G01J 1/20
G03B 7/099
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