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:
Sep. 11, 2007
Filed:
Nov. 10, 2005
Applicants:
Takashi Kato, Utsunomiya, JP;
Chiaki Terasawa, Nasugun, JP;
Inventors:
Takashi Kato, Utsunomiya, JP;
Chiaki Terasawa, Nasugun, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A catadioptric projection system for forming an intermediate image of a first object plural times, and images the intermediate image onto a second object includes at least two deflective reflectors, a lens unit arranged in an optical path between the two deflective reflectors, the lens unit having a negative refractive power, and not forming a reciprocating optical system that passes incident light and reflected light.