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. 13, 2011
Filed:
Apr. 14, 2005
Masakazu Ogasawara, Saitama, JP;
Shinichi Fujinoki, Saitama, JP;
Masakazu Ogasawara, Saitama, JP;
Shinichi Fujinoki, Saitama, JP;
Pioneer Corporation, Tokyo, JP;
Abstract
The present invention is to provide an improved aberration correction device formed by inserting an electro-optic panel such as a liquid crystal panel in an image-formation optical system to correct aberrations in the image-formation optical system, characterized in that such a correction device is capable of correcting three or more kinds of aberrations using only one electro-optic panel. Divided areas concerning coma aberration correction and divided areas concerning astigmatism correction are formed in one of the transparent electrodes of the electro-optic panel, while the rest of divided areas concerning coma aberration correction and divided areas concerning spherical aberration correction are formed in the other of the transparent electrodes. In this way, it is possible to form divided areas divided into electrode patterns suitable for correcting various aberrations, simplify as much as possible the electrode structure of the transparent electrodes consisting of the divided areas, thereby simplifying a control of voltages to be applied to the divided areas.