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:
May. 29, 2001
Filed:
Jun. 09, 1999
Applicant:
Inventors:
Kiyoshi Hama, Osaka, JP;
Keisuke Murakami, Osaka, JP;
Assignee:
Keyence Corporation, Okasa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V 8/20 ;
U.S. Cl.
CPC ...
G01V 8/20 ;
Abstract
An area sensor including a light emitter having a plurality of light emitting devices that emit rays of light and a light receiver having light receiving devices that respectively correspond to the light emitting devices for receiving the rays of light therefrom. In the area sensor, the light emitting device and/or the light receiving device that provides at least one of the optical axes formed by sets of the light emitting devices and the corresponding light receiving devices is adapted to have narrower angular characteristics than the light emitting devices and/or the light receiving devices that provide the other optical axes.