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:
Dec. 11, 1979
Filed:
Jan. 05, 1978
Noriyuki Asano, Kawasaki, JP;
Yukichi Niwa, Yokohama, JP;
Mitsutoshi Owada, Yokohama, JP;
Takaaki Yamagata, Yokohama, JP;
Shin Tsuda, Kawagoe, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A range detecting method and apparatus in which a first and a second image of an object each having a relative positional parallax corresponding to the object distance formed by a range finding optical system are purely electrically scanned by the use of one or more photosensor arrays and the resulting image scan signals in analog form relating to the first and second images are applied to first and second analog storing devices for storage therein, in which coincidence or non-coincidence between the analog image scan signals is detected by coincidence detecting drive while one of these image scan signals is shifted bit by bit relative to the other image scan signal, thereby counting an amount of shift bits required until the image scan signals of the same bit number relating to the first and second images are rendered most appropriately coincident with each other, whereby the object distance may be known from such amount of shift bits.