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:
Aug. 03, 2004
Filed:
Jul. 15, 2003
Shinichi Masuda, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention discloses a lens apparatus that can switch the aperture diameter of the light-blocking member using a body structural member constituting a portion of the lens apparatus. The lens apparatus includes a lens unit that is moved in a direction of an optical axis, a light-blocking unit having a plurality of light-blocking members forming an aperture portion through which light passes, and a body structural member. The light-blocking unit and the body structural member move relative to one another in the direction of the optical axis according to a movement of the lens unit, and an aperture diameter of the aperture portion is switched by moving the body structural member between a first position in which the light-blocking members are prevented from opening beyond a predetermined aperture diameter, and a second position in which the light-blocking members are allowed to open beyond a predetermined aperture diameter.