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:
Feb. 28, 1995
Filed:
Jul. 23, 1993
Applicant:
Inventor:
Masaaki Morizumi, Tokyo, JP;
Assignee:
Fuji Photo Optical Co., Ltd., Omiya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
3542711 ; 354274 ;
Abstract
An aperture diaphragm, configured by a plurality of diaphragm blades which are formed with generally wedge-shaped notches for defining small diaphragm apertures, is provided with a supplemental diaphragm blade coupled to one of the diaphragm blades. The supplemental diaphragm blade has a supplemental notch which is similar in shape to but shallower than the generally wedge-shaped notch of the one of the diaphragm blades so as to block up the smallest diaphragm aperture defined by the generally wedge-shaped notches of the diaphragm blades.