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:
Oct. 22, 1996
Filed:
Sep. 22, 1994
Applicant:
Inventors:
Kazuhiko Fujikawa, Takatsuki, JP;
Koji Nomura, Shijyonawata, JP;
Teruhiro Shiono, Osaka, JP;
Hisahito Ogawa, Ikoma-gun, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
250353 ; 2503383 ;
Abstract
An object of the invention is to provide a pyroelectric type infrared sensor without external lens, made in a compact size, and having an improved sensibility. A pyroelectric element for detecting infrared rays is provided in a sealed tube (sealed body) having an opening, at said opening is provided an incident infrared ray filter. A diffraction optical lens (diffraction optical element) for focusing or imaging infrared rays is provided on the front or back surface of said incident infrared ray filter.