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:
Jan. 30, 1979
Filed:
Oct. 03, 1977
Applicant:
Inventor:
Masao Abe, Tokyo, JP;
Assignee:
Nihon Beru-Haueru Kabushiki Kaisha (Bell & Howell Japan, Ltd.), Higashimurayama, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ; G03B / ;
U.S. Cl.
CPC ...
354 25 ; 354199 ; 354222 ;
Abstract
An automatic rangefinding optical system for a camera includes optics conted for movement subject to the operative zooming main lens. The rangefinding system has an automatic focusing device which generates a pulse when separate objective images from two optical system paths coincide. Zooming the rangefinder along the two optical system paths gives more precise automatic focusing of the subject by optically modifying the objective images according to the zoom position of the main lens.