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:
Dec. 01, 1981
Filed:
Jul. 12, 1979
Applicant:
Inventor:
Tadao Isono, Kokubunji, JP;
Assignee:
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ; G01J / ;
U.S. Cl.
CPC ...
354 25 ; 352140 ; 250201 ;
Abstract
An improved automatic focusing system for an optical instrument includes a scanner driven oscillatably across an angle to detect a subject positioned between infinity and the minimum focus condition of the objective lens of the optical instrument. The scanner is adjusted in response to the focus condition of the lens to align the bisector of the angle scanned with the subject when the lens is in perfect focus by electronic and mechanical interconnecting feedback means between the objective lens focusing ring and the scanning system.