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. 06, 1995
Filed:
Oct. 28, 1993
Daisuke Sahori, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical type encoder, which detects a light beam from a light source by a light receiver through a plurality of slit arrays of a gauge member provided to an object to be detected, and detects position information of the object to be detected by utilizing a signal from the receiver, is disclosed. The light receiver includes a plurality of sensors which are arranged in a direction parallel to a position detection direction and are capable of detecting the incident position of a light beam. The plurality of slit arrays of the gauge member are arranged in correspondence with the plurality of sensors, so that a plurality of slits of each slit array are aligned in the position detection direction. All the positional relationships between the corresponding slits in one slit array and the other slit array of the plurality of slit arrays are different from each other.