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:
Jun. 06, 2006
Filed:
Dec. 17, 2004
Akihiro Yamada, Tochigi, JP;
Akihiro Yamada, Tochigi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A projection optical system includes a first optical element that orients an axis [1 1 1] as a crystal orientation in a cubic system crystal parallel to an optical axis, and a second optical element that orients an axis [1 0 0] as the crystal orientation in the cubic system crystal so that a minimum angle may be 30° or larger between the optical axis and an off-axis edge beam that passes through the second optical element, and a minimum angle may be 10° or smaller between the optical axis and an off-axis principal ray that passes through the second optical element.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile