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. 05, 1988
Filed:
May. 19, 1986
Applicant:
Inventors:
Assignee:
West Electric Company, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ; H04N / ;
U.S. Cl.
CPC ...
350429 ; 350320 ; 358227 ;
Abstract
The present invention user plural driving speeds of the focusing lens component of a zoom lens which responds to plural separate control regions of focal length and object position. In each control region, the focusing lens component is driven in predetermined suitable constant speed. By this operation the object is nearly focused on the focal plane. The slight discrepancy between the image position of the object and the ideal plane is regarded as zero.