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. 27, 2007
Filed:
Jan. 25, 2007
Youzou Fukagawa, Tochigi-ken, JP;
Toshiyuki Yoshihara, Tochigi-ken, JP;
Mario Nakamori, Yokohama, JP;
Yuji Shinano, Tokyo, JP;
Youzou Fukagawa, Tochigi-ken, JP;
Toshiyuki Yoshihara, Tochigi-ken, JP;
Mario Nakamori, Yokohama, JP;
Yuji Shinano, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical apparatus which includes an image forming optical system having a movable optical element, and a driving mechanism configured to move the optical element. The apparatus includes a first block which measures a wavefront aberration of the optical system. A second block obtains a linear evaluation value of an aberration expressed by a linear function of a position of the movable optical element out of aberrations of the optical system, and a quadratic evaluation value of a square of a root mean square of the wavefront aberration measured by the first block expressed by a quadratic function of the position. A third block uses a dummy variable as an upper limit value of the linear evaluation value and obtains a minimum value of the dummy variable by a linear programming. A fourth block determines a position of the optical element to be moved by the driving mechanism.