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:
Nov. 01, 1994
Filed:
Dec. 20, 1993
Hideo Taka, Yokohama, JP;
Kazuyuki Maeda, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A distance measuring apparatus includes a light projecting device for projecting a light toward an object, a first light receiving device for receiving reflected light from the object; a second light receiving device for receiving light which is reflected by glass positioned between the distance measuring apparatus and the object; a distance calculator device for evaluating an output from the first light receiving device to calculate a distance to the object; and a distance information evaluator device for detecting a presence of glass based on an output from the second light receiving device, and for setting predetermined distance information, irrespective of the distance to the object calculated by the distance calculator device, when the presence of glass is detected.