OPTICAL FILTER ELEMENT

OPTICAL FILTER ELEMENT

PURPOSE:To provide the optical filter element which performs the wavelength separation of signal light of a desired wavelength component from signal light containing plural wavelength components to a narrow band, eliminates defects of a conventional optical filter, and holds a steep cut-off characte...

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1. Verfasser: TOKITA HIRONORI
Format: Patent
Sprache:eng
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OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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description PURPOSE:To provide the optical filter element which performs the wavelength separation of signal light of a desired wavelength component from signal light containing plural wavelength components to a narrow band, eliminates defects of a conventional optical filter, and holds a steep cut-off characteristic without varying a transmission characteristic with an angle of incidence. CONSTITUTION:Luminous flux in a random polarized state is split by polarization separating elements 1 and 5 into two parallel pieces of luminous flux, at least one of which is passed through polarization rotating elements 2 and 4 to match the polarizing directions of the two pieces of luminous flux with each other; and they are made incident on a filter which has a rotating mechanism, one of the two pieces of luminous flux is passed through a polarization rotating element, and then the two pieces of luminous flux are multiplexed through a polarization separating element to eliminate variation in the transmission characteristic even if the input luminous flux changes in polarization.
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CONSTITUTION:Luminous flux in a random polarized state is split by polarization separating elements 1 and 5 into two parallel pieces of luminous flux, at least one of which is passed through polarization rotating elements 2 and 4 to match the polarizing directions of the two pieces of luminous flux with each other; and they are made incident on a filter which has a rotating mechanism, one of the two pieces of luminous flux is passed through a polarization rotating element, and then the two pieces of luminous flux are multiplexed through a polarization separating element to eliminate variation in the transmission characteristic even if the input luminous flux changes in polarization.</description><language>eng</language><subject>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS ; OPTICS ; PHYSICS</subject><creationdate>1992</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=19921027&amp;DB=EPODOC&amp;CC=JP&amp;NR=H04304413A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=19921027&amp;DB=EPODOC&amp;CC=JP&amp;NR=H04304413A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>TOKITA HIRONORI</creatorcontrib><title>OPTICAL FILTER ELEMENT</title><description>PURPOSE:To provide the optical filter element which performs the wavelength separation of signal light of a desired wavelength component from signal light containing plural wavelength components to a narrow band, eliminates defects of a conventional optical filter, and holds a steep cut-off characteristic without varying a transmission characteristic with an angle of incidence. 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CONSTITUTION:Luminous flux in a random polarized state is split by polarization separating elements 1 and 5 into two parallel pieces of luminous flux, at least one of which is passed through polarization rotating elements 2 and 4 to match the polarizing directions of the two pieces of luminous flux with each other; and they are made incident on a filter which has a rotating mechanism, one of the two pieces of luminous flux is passed through a polarization rotating element, and then the two pieces of luminous flux are multiplexed through a polarization separating element to eliminate variation in the transmission characteristic even if the input luminous flux changes in polarization.</abstract><oa>free_for_read</oa></addata></record>
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subjects OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
title OPTICAL FILTER ELEMENT
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