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. 18, 1992
Filed:
Feb. 13, 1991
Satoshi Ueda, Yokohama, JP;
Koji Hirota, Yokohama, JP;
Makoto Itoh, Yokohama, JP;
Yukihiro Yoshida, Yokohama, JP;
Hirokazu Hukuda, Kakogawa, JP;
Shigeki Hamashima, Yokohama, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An infrared detector is capable of preventing faulty detection attributable to stray infrared rays. The infrared detector comprises an outer cylinder having an inner surface coated with a black film, an inner cylinder having an outer surface coated with a multilayer film capable of suppressing reflection, and an infrared sensing element mounted on the inner cylinder. The combined effect of the black film and the multilayer film prevents the incidence of stray infrared rays, namely, infrared rays scattered by multiple reflection, at the infrared sensing element. The infrared detector can be provided with a plurality of infrared sensing elements to detect infrared rays of frequencies in different frequency bands by providing band-pass filters each having an optical aperture in combination respectively with the infrared sensing elements.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile