Optical information storage device having phase compensating mechanism and polarization plane rotating mechanism

Optical information storage device having phase compensating mechanism and polarization plane rotating mechanism

1. Field of the Invention An optical information storage device including a first photodetector for detecting a regenerative signal from reflected light from an optical recording medium, a second photodetector for detecting a tracking error signal and a focusing error signal from the reflected light...

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1. Verfasser: Ukai, Hirataka
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creator Ukai, Hirataka
description 1. Field of the Invention An optical information storage device including a first photodetector for detecting a regenerative signal from reflected light from an optical recording medium, a second photodetector for detecting a tracking error signal and a focusing error signal from the reflected light, and a beam splitter for separating the reflected light into a first beam directed toward the first photodetector and a second beam directed toward the second photodetector. The optical information storage device further includes a phase compensating mechanism provided between the beam splitter and the first photodetector for compensating for a phase difference of the first beam, a Wollaston prism provided between the phase compensating mechanism and the first photodetector for separating the first beam into two beams having orthogonal polarization planes, and a polarization plane rotating mechanism for rotating the polarization plane of the first beam incident on the Wollaston prism.
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Field of the Invention An optical information storage device including a first photodetector for detecting a regenerative signal from reflected light from an optical recording medium, a second photodetector for detecting a tracking error signal and a focusing error signal from the reflected light, and a beam splitter for separating the reflected light into a first beam directed toward the first photodetector and a second beam directed toward the second photodetector. The optical information storage device further includes a phase compensating mechanism provided between the beam splitter and the first photodetector for compensating for a phase difference of the first beam, a Wollaston prism provided between the phase compensating mechanism and the first photodetector for separating the first beam into two beams having orthogonal polarization planes, and a polarization plane rotating mechanism for rotating the polarization plane of the first beam incident on the Wollaston prism.</description><language>eng</language><creationdate>2002</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6472651$$EPDF$$P50$$Guspatents$$Hfree_for_read</linktopdf><link.rule.ids>230,308,780,802,885,64039</link.rule.ids><linktorsrc>$$Uhttps://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6472651$$EView_record_in_USPTO$$FView_record_in_$$GUSPTO$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Ukai, Hirataka</creatorcontrib><creatorcontrib>Fujitsu Limited</creatorcontrib><title>Optical information storage device having phase compensating mechanism and polarization plane rotating mechanism</title><description>1. 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The optical information storage device further includes a phase compensating mechanism provided between the beam splitter and the first photodetector for compensating for a phase difference of the first beam, a Wollaston prism provided between the phase compensating mechanism and the first photodetector for separating the first beam into two beams having orthogonal polarization planes, and a polarization plane rotating mechanism for rotating the polarization plane of the first beam incident on the Wollaston prism.</description><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2002</creationdate><recordtype>patent</recordtype><sourceid>EFH</sourceid><recordid>eNqNzD0KAjEQhuFtLES9w1xA8Hc9gCh2NvYyZGeTgWQyZOIWnt4VraysXvh4-KaNXrWywwgsfS4JK2cBq7mgJ-hoYEcQcGDxoAGNwOWkJDbCcUrkAgpbApQONEcs_Px8aEQhKLn-yHkz6TEaLb6dNXA-3Y6X5cMUK0m1uy_4zqrdHTbtfr39g7wAmKZFYQ</recordid><startdate>20021029</startdate><enddate>20021029</enddate><creator>Ukai, Hirataka</creator><scope>EFH</scope></search><sort><creationdate>20021029</creationdate><title>Optical information storage device having phase compensating mechanism and polarization plane rotating mechanism</title><author>Ukai, Hirataka</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-uspatents_grants_064726513</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2002</creationdate><toplevel>online_resources</toplevel><creatorcontrib>Ukai, Hirataka</creatorcontrib><creatorcontrib>Fujitsu Limited</creatorcontrib><collection>USPTO Issued Patents</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Ukai, Hirataka</au><aucorp>Fujitsu Limited</aucorp><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Optical information storage device having phase compensating mechanism and polarization plane rotating mechanism</title><date>2002-10-29</date><risdate>2002</risdate><abstract>1. Field of the Invention An optical information storage device including a first photodetector for detecting a regenerative signal from reflected light from an optical recording medium, a second photodetector for detecting a tracking error signal and a focusing error signal from the reflected light, and a beam splitter for separating the reflected light into a first beam directed toward the first photodetector and a second beam directed toward the second photodetector. The optical information storage device further includes a phase compensating mechanism provided between the beam splitter and the first photodetector for compensating for a phase difference of the first beam, a Wollaston prism provided between the phase compensating mechanism and the first photodetector for separating the first beam into two beams having orthogonal polarization planes, and a polarization plane rotating mechanism for rotating the polarization plane of the first beam incident on the Wollaston prism.</abstract><oa>free_for_read</oa></addata></record>
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title Optical information storage device having phase compensating mechanism and polarization plane rotating mechanism
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