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:
Jun. 11, 1985
Filed:
Jun. 29, 1982
Makoto Masunaga, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A distance measuring device comprised of a system which projects infrared rays on a distant object, a light receiving optical system positioned at a prescribed base length from the infrared ray projecting system; a sensor of the signal storage type including an array of light sensitive elements arranged in a position which approximately coincides with the imaging plane of the light receiving optical system. A control means arranged to cause the sensor to perform a storing action under a first condition in which the infrared ray projecting system is allowed to operate and also under a second condition in which the infrared ray projection system is not allowed to operate, and digital computing means designed to detect a difference between output signals of every light sensitive element respectively produced under the first and second conditions and to detect a distance to the distant object on the basis of the results of detection of the difference between these signals.