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. 24, 2014
Filed:
Jan. 15, 2010
Applicant:
Yuhei Sumiyoshi, Utsunomiya, JP;
Inventor:
Yuhei Sumiyoshi, Utsunomiya, JP;
Assignee:
Canon Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 27/68 (2006.01);
U.S. Cl.
CPC ...
Abstract
A projection optical system of the present invention includes an optical element group that includes optical elements, and a controller that drives at least one of the first optical elements. The optical element group includes aspheric surfaces having a complementary relationship with each other and are arranged so that the aspheric surfaces face each other. The controller changes a relative position between the optical elements in a first direction and a second direction orthogonal to the first direction to control optical performances of the projection optical system corresponding to each of the first direction and the second direction.