Optical diffraction element, optical pickup, and optical diffraction element manufacturing method

Provided is an optical diffraction element that restricts overall thickness of the element while maintaining strength. The optical diffraction element comprises a substrate; an orientation layer that is formed on one surface of the substrate and includes anisotropic polymers that are oriented perpen...

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Hauptverfasser: Watabe Kenichi, Umezawa Yasuaki
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creator Watabe Kenichi
Umezawa Yasuaki
description Provided is an optical diffraction element that restricts overall thickness of the element while maintaining strength. The optical diffraction element comprises a substrate; an orientation layer that is formed on one surface of the substrate and includes anisotropic polymers that are oriented perpendicular to or inclined relative to a surface of the substrate in at least a partial region of the orientation layer; and a liquid crystal layer formed on the orientation layer. The liquid crystal layer includes a plurality of orientation patterns that are formed periodically and include liquid crystal molecules having different orientation directions, and the orientation direction for at least some of the orientation patterns is perpendicular to or inclined relative to the surface of the substrate, as a result of aligning with the orientation of the orientation layer formed on a bottom surface of the orientation patterns.
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The liquid crystal layer includes a plurality of orientation patterns that are formed periodically and include liquid crystal molecules having different orientation directions, and the orientation direction for at least some of the orientation patterns is perpendicular to or inclined relative to the surface of the substrate, as a result of aligning with the orientation of the orientation layer formed on a bottom surface of the orientation patterns.</description><language>eng</language><subject>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 ; INFORMATION STORAGE ; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER ; NON-LINEAR OPTICS ; OPTICAL ANALOGUE/DIGITAL CONVERTERS ; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS ; OPTICAL LOGIC ELEMENTS ; OPTICS ; PHYSICS ; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF</subject><creationdate>2017</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20170314&amp;DB=EPODOC&amp;CC=US&amp;NR=9594276B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76294</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20170314&amp;DB=EPODOC&amp;CC=US&amp;NR=9594276B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Watabe Kenichi</creatorcontrib><creatorcontrib>Umezawa Yasuaki</creatorcontrib><title>Optical diffraction element, optical pickup, and optical diffraction element manufacturing method</title><description>Provided is an optical diffraction element that restricts overall thickness of the element while maintaining strength. 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subjects 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
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
NON-LINEAR OPTICS
OPTICAL ANALOGUE/DIGITAL CONVERTERS
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICAL LOGIC ELEMENTS
OPTICS
PHYSICS
TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
title Optical diffraction element, optical pickup, and optical diffraction element manufacturing method
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