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. 30, 1985
Filed:
Aug. 17, 1981
Applicant:
Inventor:
Howard G Rogers, Weston, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ; G02C / ;
U.S. Cl.
CPC ...
350423 ; 350437 ; 351168 ;
Abstract
A variable focus lens system comprising an elastomeric lens structured to undergo shape changes and corresponding focal length changes in a continuous manner over a predetermined range in response to variations in a tensile stress uniformly distributed around the peripheral edges of the lens element. The lens element is preferably structured of silicon rubber materials which are molded around an extensible and contractable annular coil spring arrangement which is utilized to apply the required variable tensile stress.