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:
Jan. 18, 2011
Filed:
Mar. 03, 2009
Hiroshi Nomura, Saitama, JP;
Kazunori Ishizuka, Kanagawa, JP;
Hiroshi Nomura, Saitama, JP;
Kazunori Ishizuka, Kanagawa, JP;
Hoya Corporation, Tokyo, JP;
Abstract
A light shielding structure of an optical device includes outer and inner annular members which move relative to each other in an axial direction, small and large diameter outer peripheral portions formed on the inner annular member, and a light shielding ring positioned inside the outer annular member and supported thereby. The light shielding ring does not contact the small-diameter outer peripheral portion of the inner annular member. The light shielding ring and the large-diameter outer peripheral portion of the inner annular member coincide with each other in the axial direction in an operating state of the optical device whereby a clearance between the outer annular member and the inner annular member is made light-tight. The light shielding ring and the small-diameter outer peripheral portion of the inner annular member coincide with each other in the axial direction in a non-operating state of the optical device.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile