Patent ID: 8018814
Filing Date: 2011-09-13
Classification: G02F,G11B

Abstract:
1. An aberration correction device in which a liquid crystal panel is inserted into an image-formation optical system to perform aberration correction in the image-formation optical system, wherein the liquid crystal panel comprises a pair of transparent electrodes which are formed by virtue of divided areas divided into electrode patterns capable of selectively correcting several kinds of aberrations including coma aberration, spherical aberration and astigmatism, wherein part of the divided areas concerning coma aberration correction are formed in one of the transparent electrodes, and the rest of the divided areas concerning coma aberration correction are formed in the other of the transparent electrodes, wherein the part of the divided areas concerning coma aberration correction and the divided areas concerning astigmatism correction are formed in one of the transparent electrodes, while the rest of the divided areas concerning coma aberration correction and the divided areas concerning spherical aberration correction are formed in the other of the transparent electrodes, wherein a central and generally circular pattern is divided into three portions to form part of the divided areas concerning coma aberration correction in one of the transparent electrodes, and an area on the outside of said generally circular pattern is radially divided to form divided areas concerning astigmatism correction, while a central circular pattern and divided areas consisting of an annular pattern concentric with the central circular pattern concerning spherical aberration correction are formed in the other of the transparent electrodes, and the rest of the divided areas concerning coma aberration correction are formed on the outside of said divided areas concerning spherical aberration correction.