LIQUID CRYSTAL OPTICAL ELEMENT, METHOD OF MANUFACTURING THE SAME AND PICKUP APPARATUS PROVIDED WITH THE SAME

LIQUID CRYSTAL OPTICAL ELEMENT, METHOD OF MANUFACTURING THE SAME AND PICKUP APPARATUS PROVIDED WITH THE SAME

PROBLEM TO BE SOLVED: To provide a liquid crystal optical element which does not disturb vertical alignment of liquid crystal molecules even when there is a region where a liquid crystal layer is not driven in an effective region; to provide a method of manufacturing the liquid crystal optical eleme...

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Bibliographische Detailangaben
1. Verfasser: TAKANE YOSHIHARU
Format: Patent
Sprache:eng
Schlagworte:
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING
FREQUENCY-CHANGING
NON-LINEAR OPTICS
OPTICAL ANALOGUE/DIGITAL CONVERTERS
OPTICAL LOGIC ELEMENTS
OPTICS
PHYSICS
TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a liquid crystal optical element which does not disturb vertical alignment of liquid crystal molecules even when there is a region where a liquid crystal layer is not driven in an effective region; to provide a method of manufacturing the liquid crystal optical element; and to provide an optical pickup apparatus provided with the liquid crystal optical element. SOLUTION: A dummy electrode 18a which is made of the same material as that of a driving electrode 18 and is electrically insulated from the driving electrode 18 is arranged in a region where there is no driving electrode 18 in the effective region 15. The driving electrode 18 and the dummy electrode 18a are covered with a vertically aligned film 19. Thus, in a driving electrode region and a non-driving electrode region, substrate conditions of the vertical alignment films 19 are made common and alignment disorder is hardly caused. COPYRIGHT: (C)2011,JPO&INPIT