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. 19, 1998
Filed:
Sep. 19, 1995
Yoshiro Kodaka, Kanagawa, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A diaphragm movement device that moves a diaphragm mechanism with movement of a lens group to improve optical performance is disclosed. The diaphragm movement device includes a first lens group, a second lens group that is movable in the direction of the optical axis with the respect to the first lens group for focus and/or focal length adjustment, a diaphragm mechanism including a diaphragm blade holding ring, a diaphragm driving plate, and a diaphragm blade between the first lens group and the second lens group, and a diaphragm movement component having a protrusion and a sloped surface. An applied force member moves the diaphragm mechanism in the direction of the optical axis by a fixed amount corresponding to the movement of the second lens group in the direction of the optical axis.