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. 14, 1989
Filed:
Oct. 14, 1988
Masami Yamakawa, Yokohama, JP;
Wako Corporation, Kanagawa, JP;
Abstract
A photoelectric sensor comprises a thin plate-shaped optical body, a circuit block and a casing for incorporating therein the optical body and the circuit block. A nearly infrared light incoming through a front surface of the casing is reflected upon a first reflective surface of the optical body. Following this first reflection, a second reflection is made upon a second reflective surface thereof. The light having passed through a light collective lens is received by a photoelectric converting element and converted into electric signals for output. Since the optical body comprises a plurality of reflective surfaces, an optical path up to the photoelectric converting element can be incorporated compactly within the thin plate-shaped optical body.