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:
Feb. 24, 1981
Filed:
Dec. 10, 1979
Harumi Aoki, Kiyose, JP;
Yoshio Sawada, Tokyo, JP;
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An automatic focus detecting device for a camera including a self-scanning type photoelectric element unit including plural minute photoelectric elements disposed in a plane corresponding to the position of the image forming plane of the photographing lens of the camera. The photoelectric element unit is scanned and the output signals from the unit are sampled and held over a scanning time period. The output signals from second adjacent ones of the elements are coupled to differential circuits the outputs of which are multiplexed onto a single output line. The peak value of the multiplexed signal is detected. When the peak value signal is at its maximum, the camera will be in proper focus.