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:
May. 12, 1987
Filed:
May. 05, 1982
Applicant:
Inventors:
Kikuo Momiyama, Kanagawa, JP;
Hiromi Someya, Kanagawa, JP;
Assignee:
Canon Kabushiki Kaisha, , US;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ; G02B / ; G02B / ;
U.S. Cl.
CPC ...
350410 ; 350474 ; 350475 ; 354219 ; 354225 ;
Abstract
An eye-piece constituting part of a finder optical system in a camera is constructed from three lens components, one of which is made axially movable to effect adjusting diopter, wherein the refractive powers and forms of all the components are so properly chosen as to maintain good stability of aberration correction throughout the adjusting diopter range.