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1. 发明授权

US07839458B2 Liquid crystal optical element having grouped concentric electrodes 有权
标题翻译：液晶光学元件具有分组的同心电极
公开(公告)号：US07839458B2
公开(公告)日：2010-11-23
申请号：US11885180
申请日：2006-02-17
申请人： Seiichi Osawa , Shinya Sato , Masayuki Iwasaki , Takeshi Toyoda
发明人： Seiichi Osawa , Shinya Sato , Masayuki Iwasaki , Takeshi Toyoda
IPC分类号： G02B1/13 , G11B7/135
CPC分类号： G02F1/134309 , G02F2203/18 , G11B7/1367 , G11B7/1369 , G11B7/13925 , G11B2007/0006
摘要： A first electrode of a liquid crystal cell (21) is composed of a plurality of concentric electrodes (31 to 34) of a concentrically circular shape, the plurality of concentric electrodes are divided into a first group of concentric electrodes (44) near the center and a second group of concentric electrodes (45) near the periphery, and a concentric electrode between the two groups is an independent single electrode (36). A first correction unit that corrects spherical aberration of a high density DVD is composed of the two groups and a second correction unit that corrects aberration of a conventional DVD is composed of the first group of concentric electrodes (44). In the case of correcting the aberration of the conventional DVD, the independent concentric electrode (36) is supplied with a voltage between the voltages respectively supplied to adjacent concentric electrodes (35), (37). In the case of correcting the aberration of the high density DVD, the independent concentric electrode (36) is supplied with a voltage equal to the voltage supplied to the concentric electrode immediately lateral thereto (37).
摘要翻译：液晶单元（21）的第一电极由同心圆形的多个同心电极（31〜34）构成，多个同心电极被分成第一组同心电极（44），靠近中心以及在周边附近的第二组同心电极（45），并且两组之间的同心电极是独立的单电极（36）。校正高密度DVD的球面像差的第一校正单元由两组组成，并且校正常规DVD的像差的第二校正单元由第一组同心电极（44）组成。在校正常规DVD的像差的情况下，独立同心电极（36）被提供在分别提供给相邻同心电极（35），（37）的电压之间。在校正高密度DVD的像差的情况下，向独立同心电极（36）提供等于提供给紧邻其的同心电极的电压（37）。

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