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, 1991
Filed:
Dec. 14, 1989
Applicant:
Inventor:
Kiyoshi Ikuta, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354403 ;
Abstract
In a distance measuring device for measuring a distance to an object by projecting a signal light and by receiving the reflected light thereof, at least two light emitting elements are arranged for projecting the signal light; a common drive source is provided for driving the two light emitting elements; and a control circuit is arranged to prevent the two light emitting elements form simultaneously lighting up.