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:
Apr. 28, 1992
Filed:
Oct. 10, 1990
Applicant:
Inventors:
Akihisa Horiuchi, Kanagawa, JP;
Youichi Iwasaki, Kanagawa, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
250561 ; 2502016 ; 356-1 ; 354403 ;
Abstract
In an optical system arranged to detect a distance to an object to be photographed by projecting beams of light from a light emitting element which emits visible light or infrared rays or the like and by receiving reflected light from the object at a light receiving element, a light projecting lens system having a plurality of optical axes is arranged in front of the light emitting element to have a spherical or aspherical surface on the side of the object and a plurality of planes for forming the plurality of optical axes on the side of the light emitting element.