The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 29, 1985
Filed:
Apr. 06, 1982
Yasuhiro Nanba, Sennan, JP;
Takayuki Gotoh, Minamikawachi, JP;
Eiji Yamakawa, Sakai, JP;
Toshihiko Karasaki, Sakai, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
A focus detecting photoelectric device includes a plurality of photodiodes each formed by an amorphous silicon layer sandwiched between transparent and non-transparent electrodes. The photodiodes are provided in pairs and are aligned in an array and deposited on a glass plate such that the transparent electrode is directly mounted on the glass plate. The photodiodes in a pair are located closely adjacent to, but in a spaced relation with, each other and are electrically connected in series to each other. An image formed on the photodiodes in a pair effects the generation of photocurrent from the photodiodes such that the photocurrents from both photodiodes are approximately the same when the image is out of focus, and they vary from each other as the image becomes sharp.