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:
Sep. 13, 2005
Filed:
Oct. 03, 2003
Applicant:
Masayuki Inamoto, Saitama, JP;
Inventor:
Masayuki Inamoto, Saitama, JP;
Assignee:
Fuji Photo Optical Co., Ltd., Saitama, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B021/14 ; G03B027/22 ; G02B009/00 ;
U.S. Cl.
CPC ...
Abstract
An asymmetric aperture diaphragm placing structure for a projection lens is provided for securing an asymmetric aperture diaphragm to a lens holder. The asymmetric aperture diaphragm includes a positioning part formed asymmetrical about the optical axis. The lens holder has a mating part adapted to engage the positioning part only in a state where the asymmetric aperture diaphragm is in a predetermined direction with respect to the optical axis. The asymmetric aperture diaphragm is secured to the lens holder in a state where the positioning part and the mating part engage each other.