Optical filter and optical device provided with this optical filter
Light emitted from a taking lens 20 enters a first birefringent plate 1a to be spatially divided along a first direction extending perpendicular to the direction in which the light advances to achieve two separate rays L10 and L20. The vibrational planes of the two light fluxes L10 and L20 emitted f...
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| creator | OSAWA KEIJI |
| description | Light emitted from a taking lens 20 enters a first birefringent plate 1a to be spatially divided along a first direction extending perpendicular to the direction in which the light advances to achieve two separate rays L10 and L20. The vibrational planes of the two light fluxes L10 and L20 emitted from the first birefringent plate 1a are converted to a circularly polarized light by a phase plate 1c. The two light fluxes L10' and L20' emitted from the phase plate 1c are each spatially divided into two by a second birefringent plate 1d along a second direction extending perpendicular to the first direction to achieve four separate rays L11, L12. L21 and L22, to be guided to an imaging plane 15a of an imaging device 15. At least either the first birefringent plate or the second birefringent plate is constituted of lithium niobate, rutile, Chilean nitrate, or the like. |
| format | Patent |
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The vibrational planes of the two light fluxes L10 and L20 emitted from the first birefringent plate 1a are converted to a circularly polarized light by a phase plate 1c. The two light fluxes L10' and L20' emitted from the phase plate 1c are each spatially divided into two by a second birefringent plate 1d along a second direction extending perpendicular to the first direction to achieve four separate rays L11, L12. L21 and L22, to be guided to an imaging plane 15a of an imaging device 15. At least either the first birefringent plate or the second birefringent plate is constituted of lithium niobate, rutile, Chilean nitrate, or the like.</description><edition>7</edition><language>eng</language><subject>ELECTRIC COMMUNICATION TECHNIQUE ; ELECTRICITY ; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS ; OPTICS ; PHYSICS ; PICTORIAL COMMUNICATION, e.g. TELEVISION</subject><creationdate>2004</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=20040817&DB=EPODOC&CC=US&NR=6778325B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20040817&DB=EPODOC&CC=US&NR=6778325B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>OSAWA KEIJI</creatorcontrib><title>Optical filter and optical device provided with this optical filter</title><description>Light emitted from a taking lens 20 enters a first birefringent plate 1a to be spatially divided along a first direction extending perpendicular to the direction in which the light advances to achieve two separate rays L10 and L20. The vibrational planes of the two light fluxes L10 and L20 emitted from the first birefringent plate 1a are converted to a circularly polarized light by a phase plate 1c. The two light fluxes L10' and L20' emitted from the phase plate 1c are each spatially divided into two by a second birefringent plate 1d along a second direction extending perpendicular to the first direction to achieve four separate rays L11, L12. L21 and L22, to be guided to an imaging plane 15a of an imaging device 15. At least either the first birefringent plate or the second birefringent plate is constituted of lithium niobate, rutile, Chilean nitrate, or the like.</description><subject>ELECTRIC COMMUNICATION TECHNIQUE</subject><subject>ELECTRICITY</subject><subject>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS</subject><subject>OPTICS</subject><subject>PHYSICS</subject><subject>PICTORIAL COMMUNICATION, e.g. TELEVISION</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2004</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZHD2LyjJTE7MUUjLzClJLVJIzEtRyIcKpaSWZSanKhQU5ZdlpqSmKJRnlmQolGRkFsNVQDTxMLCmJeYUp_JCaW4GBTfXEGcP3dSC_PjU4oLE5NS81JL40GAzc3MLYyNTJyNjIpQAAB3FMkw</recordid><startdate>20040817</startdate><enddate>20040817</enddate><creator>OSAWA KEIJI</creator><scope>EVB</scope></search><sort><creationdate>20040817</creationdate><title>Optical filter and optical device provided with this optical filter</title><author>OSAWA KEIJI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US6778325B23</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2004</creationdate><topic>ELECTRIC COMMUNICATION TECHNIQUE</topic><topic>ELECTRICITY</topic><topic>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS</topic><topic>OPTICS</topic><topic>PHYSICS</topic><topic>PICTORIAL COMMUNICATION, e.g. TELEVISION</topic><toplevel>online_resources</toplevel><creatorcontrib>OSAWA KEIJI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>OSAWA KEIJI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Optical filter and optical device provided with this optical filter</title><date>2004-08-17</date><risdate>2004</risdate><abstract>Light emitted from a taking lens 20 enters a first birefringent plate 1a to be spatially divided along a first direction extending perpendicular to the direction in which the light advances to achieve two separate rays L10 and L20. The vibrational planes of the two light fluxes L10 and L20 emitted from the first birefringent plate 1a are converted to a circularly polarized light by a phase plate 1c. The two light fluxes L10' and L20' emitted from the phase plate 1c are each spatially divided into two by a second birefringent plate 1d along a second direction extending perpendicular to the first direction to achieve four separate rays L11, L12. L21 and L22, to be guided to an imaging plane 15a of an imaging device 15. At least either the first birefringent plate or the second birefringent plate is constituted of lithium niobate, rutile, Chilean nitrate, or the like.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| subjects | ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION |
| title | Optical filter and optical device provided with this optical filter |
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