OPTICAL PICKUP DEVICE
PROBLEM TO BE SOLVED: To provide an optical pickup device adopting a polarizing hologram element being multiply coated. SOLUTION: This device comprises a light source 120, an objective lens 170 converging a light beam transmitted from the light source 120 on a recording medium 10, a hologram element...
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| creator | CHO KENKO TEI SHOZO RI TETSUU |
| description | PROBLEM TO BE SOLVED: To provide an optical pickup device adopting a polarizing hologram element being multiply coated. SOLUTION: This device comprises a light source 120, an objective lens 170 converging a light beam transmitted from the light source 120 on a recording medium 10, a hologram element 150 arranged on the optical path between the light source 120 and the objective lens 170 and converting the propagation of the incident beam, a phase delaying plate 160 changing the polarizing direction of the incident beam and a photodetector 180 receiving a light beam reflected by the recording medium 10. The hologram element 150, including a polarizing beam splitter 151, transmitting through the beam of one polarizing component of the incident beams and reflecting the other polarizing component, and a reflection member 152, diffracting the beam passed through the polarizing beam splitter 151 for forming a hologram pattern and reflecting the incident beam, is obliquely arranged between the light source and the phase delaying plate. |
| format | Patent |
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SOLUTION: This device comprises a light source 120, an objective lens 170 converging a light beam transmitted from the light source 120 on a recording medium 10, a hologram element 150 arranged on the optical path between the light source 120 and the objective lens 170 and converting the propagation of the incident beam, a phase delaying plate 160 changing the polarizing direction of the incident beam and a photodetector 180 receiving a light beam reflected by the recording medium 10. The hologram element 150, including a polarizing beam splitter 151, transmitting through the beam of one polarizing component of the incident beams and reflecting the other polarizing component, and a reflection member 152, diffracting the beam passed through the polarizing beam splitter 151 for forming a hologram pattern and reflecting the incident beam, is obliquely arranged between the light source and the phase delaying plate.</description><edition>6</edition><language>eng</language><subject>INFORMATION STORAGE ; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER ; PHYSICS</subject><creationdate>1998</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&date=19980331&DB=EPODOC&CC=JP&NR=H1083563A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76293</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19980331&DB=EPODOC&CC=JP&NR=H1083563A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>CHO KENKO</creatorcontrib><creatorcontrib>TEI SHOZO</creatorcontrib><creatorcontrib>RI TETSUU</creatorcontrib><title>OPTICAL PICKUP DEVICE</title><description>PROBLEM TO BE SOLVED: To provide an optical pickup device adopting a polarizing hologram element being multiply coated. SOLUTION: This device comprises a light source 120, an objective lens 170 converging a light beam transmitted from the light source 120 on a recording medium 10, a hologram element 150 arranged on the optical path between the light source 120 and the objective lens 170 and converting the propagation of the incident beam, a phase delaying plate 160 changing the polarizing direction of the incident beam and a photodetector 180 receiving a light beam reflected by the recording medium 10. The hologram element 150, including a polarizing beam splitter 151, transmitting through the beam of one polarizing component of the incident beams and reflecting the other polarizing component, and a reflection member 152, diffracting the beam passed through the polarizing beam splitter 151 for forming a hologram pattern and reflecting the incident beam, is obliquely arranged between the light source and the phase delaying plate.</description><subject>INFORMATION STORAGE</subject><subject>INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER</subject><subject>PHYSICS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1998</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZBD1DwjxdHb0UQjwdPYODVBwcQ3zdHblYWBNS8wpTuWF0twMCm6uIc4euqkF-fGpxQWJyal5qSXxXgEehgYWxqZmxo7GRCgBAFnZHpg</recordid><startdate>19980331</startdate><enddate>19980331</enddate><creator>CHO KENKO</creator><creator>TEI SHOZO</creator><creator>RI TETSUU</creator><scope>EVB</scope></search><sort><creationdate>19980331</creationdate><title>OPTICAL PICKUP DEVICE</title><author>CHO KENKO ; TEI SHOZO ; RI TETSUU</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPH1083563A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1998</creationdate><topic>INFORMATION STORAGE</topic><topic>INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER</topic><topic>PHYSICS</topic><toplevel>online_resources</toplevel><creatorcontrib>CHO KENKO</creatorcontrib><creatorcontrib>TEI SHOZO</creatorcontrib><creatorcontrib>RI TETSUU</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>CHO KENKO</au><au>TEI SHOZO</au><au>RI TETSUU</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>OPTICAL PICKUP DEVICE</title><date>1998-03-31</date><risdate>1998</risdate><abstract>PROBLEM TO BE SOLVED: To provide an optical pickup device adopting a polarizing hologram element being multiply coated. SOLUTION: This device comprises a light source 120, an objective lens 170 converging a light beam transmitted from the light source 120 on a recording medium 10, a hologram element 150 arranged on the optical path between the light source 120 and the objective lens 170 and converting the propagation of the incident beam, a phase delaying plate 160 changing the polarizing direction of the incident beam and a photodetector 180 receiving a light beam reflected by the recording medium 10. The hologram element 150, including a polarizing beam splitter 151, transmitting through the beam of one polarizing component of the incident beams and reflecting the other polarizing component, and a reflection member 152, diffracting the beam passed through the polarizing beam splitter 151 for forming a hologram pattern and reflecting the incident beam, is obliquely arranged between the light source and the phase delaying plate.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record> |
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| subjects | INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PHYSICS |
| title | OPTICAL PICKUP DEVICE |
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