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:
Nov. 30, 2004
Filed:
Feb. 26, 2004
Setsuo Yoshida, Saitama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A retainer for holding a rotationally symmetrical optical element, includes a retaining member that holds the optical element via three support parts arranged at approximately 120° intervals, and a joint member that joints the optical element with the retaining member, wherein |(z −0.6w )−(z +1.2)|≦1 is met, where z is a coordinate of a gravity center of the optical element, z is a coordinate of a center position of a width of said joint member in the z axis direction by which said joint member contacts the optical element, and w is the width of said joint member in the z axis direction by which said joint member contacts the optical element.