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. 20, 1979
Filed:
Sep. 15, 1977
Shinji Murata, Tokyo, JP;
Toshio Iwaya, Machida, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A photoguide member having a first end face opposed to the path followed by a moving body and a second end face through which the light having entered through said first end face exits is disposed along the path of the moving body. The photoguide member is formed of a light transmitting material and has a recess formed in the second end face thereof. Light projected on the moving body enters the photoguide member through its first end face and passes through the photoguide member, whereafter the light travels to photodetector disposed in opposed relationship with the recess in the second end face. The body is detected in accordance with the presence of the light passing to the photodetector. The gap between the photoreception surface of the photodetector and the recess may be filled with a light transmitting material.