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:
Feb. 12, 1985
Filed:
May. 21, 1982
Yoshihiko Kabaya, Kanagawa, JP;
Mitutoyo Mfg. Co., Ltd., Tokyo, JP;
Abstract
A photoelectrical encoder wherein a physical quantity is detected from brightness obtained by moving a first and a second scales each provided thereon with an optical grating relative to each other, characterized in that the grating in one of the scales is constructed such that a first signal lead-out material layer made of a light shielding conductive material, a PN semiconductor layer for converting light into electricity and a second signal lead-out material layer made of a light transmitting conductive material are laminated on a light transmitting base member in the described order to form a narrow belt-shaped light receiving portion and a plurality of narrow belt-shaped light receiving portions thus formed are arranged at regular pitches, as against the light from the light transmitting base member, the light receiving portions function as light shielding slits and intervals between the light receiving portions are formed into light transmitting slits.