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:
Apr. 21, 1992
Filed:
Jun. 24, 1991
Kiyoshi Ikuta, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A distance measuring device determines the distance to an object. A position detector detects the position of a signal reflected off an object. The position detector has a plurality of outputs wherein the ratio between the outputs vary in accordance with the position of the reflected signal. The ratio is obtained from the ratio of a period of time required for an ascending integration to a period of time required for a descending integration. A control circuit causes the ascending integration and descending integration to be performed repeatedly a plural number of times and obtains the receiving position from the ratio of the periods of time required for the plural number of times of the ascending integration and the descending integration.