Zoom lens system, imaging device and camera
A zoom lens system comprising: a positive first lens unit; a negative second lens unit; a positive third lens unit; and one or more subsequent lens units, wherein in zooming, the first to third lens units are moved along an optical axis to perform magnification change, a lens unit alpha which is one...
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creator | BITO TAKAKAZU |
description | A zoom lens system comprising: a positive first lens unit; a negative second lens unit; a positive third lens unit; and one or more subsequent lens units, wherein in zooming, the first to third lens units are moved along an optical axis to perform magnification change, a lens unit alpha which is one of the subsequent lens units does not move during zooming, but moves during transition from an imaging state to an accommodated state, and the conditions: 0.8 |
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fullrecord | <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_US8576492B2</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>US8576492B2</sourcerecordid><originalsourceid>FETCH-epo_espacenet_US8576492B23</originalsourceid><addsrcrecordid>eNrjZNCOys_PVchJzStWKK4sLknN1VHIzE1Mz8xLV0hJLctMTlVIzEtRSE7MTS1K5GFgTUvMKU7lhdLcDApuriHOHrqpBfnxqcUFicmpeakl8aHBFqbmZiaWRk5GxkQoAQDl3CjG</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>Zoom lens system, imaging device and camera</title><source>esp@cenet</source><creator>BITO TAKAKAZU</creator><creatorcontrib>BITO TAKAKAZU</creatorcontrib><description>A zoom lens system comprising: a positive first lens unit; a negative second lens unit; a positive third lens unit; and one or more subsequent lens units, wherein in zooming, the first to third lens units are moved along an optical axis to perform magnification change, a lens unit alpha which is one of the subsequent lens units does not move during zooming, but moves during transition from an imaging state to an accommodated state, and the conditions: 0.8<LT/fT<1.2, 0.12<Dalpha/fGalpha<0.30 and fT/fW>9.0 (LT: overall length of lens system at a telephoto limit, Dalpha: axial air-equivalent length between a most image side surface of the lens unit alpha and an image surface, fGalpha: focal length of the lens unit alpha, fW and fT: focal lengths of the entire system at a wide-angle limit and a telephoto limit) are satisfied.</description><language>eng</language><subject>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS ; OPTICS ; PHYSICS</subject><creationdate>2013</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=20131105&DB=EPODOC&CC=US&NR=8576492B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20131105&DB=EPODOC&CC=US&NR=8576492B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>BITO TAKAKAZU</creatorcontrib><title>Zoom lens system, imaging device and camera</title><description>A zoom lens system comprising: a positive first lens unit; a negative second lens unit; a positive third lens unit; and one or more subsequent lens units, wherein in zooming, the first to third lens units are moved along an optical axis to perform magnification change, a lens unit alpha which is one of the subsequent lens units does not move during zooming, but moves during transition from an imaging state to an accommodated state, and the conditions: 0.8<LT/fT<1.2, 0.12<Dalpha/fGalpha<0.30 and fT/fW>9.0 (LT: overall length of lens system at a telephoto limit, Dalpha: axial air-equivalent length between a most image side surface of the lens unit alpha and an image surface, fGalpha: focal length of the lens unit alpha, fW and fT: focal lengths of the entire system at a wide-angle limit and a telephoto limit) are satisfied.</description><subject>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS</subject><subject>OPTICS</subject><subject>PHYSICS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2013</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZNCOys_PVchJzStWKK4sLknN1VHIzE1Mz8xLV0hJLctMTlVIzEtRSE7MTS1K5GFgTUvMKU7lhdLcDApuriHOHrqpBfnxqcUFicmpeakl8aHBFqbmZiaWRk5GxkQoAQDl3CjG</recordid><startdate>20131105</startdate><enddate>20131105</enddate><creator>BITO TAKAKAZU</creator><scope>EVB</scope></search><sort><creationdate>20131105</creationdate><title>Zoom lens system, imaging device and camera</title><author>BITO TAKAKAZU</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US8576492B23</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2013</creationdate><topic>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS</topic><topic>OPTICS</topic><topic>PHYSICS</topic><toplevel>online_resources</toplevel><creatorcontrib>BITO TAKAKAZU</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>BITO TAKAKAZU</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Zoom lens system, imaging device and camera</title><date>2013-11-05</date><risdate>2013</risdate><abstract>A zoom lens system comprising: a positive first lens unit; a negative second lens unit; a positive third lens unit; and one or more subsequent lens units, wherein in zooming, the first to third lens units are moved along an optical axis to perform magnification change, a lens unit alpha which is one of the subsequent lens units does not move during zooming, but moves during transition from an imaging state to an accommodated state, and the conditions: 0.8<LT/fT<1.2, 0.12<Dalpha/fGalpha<0.30 and fT/fW>9.0 (LT: overall length of lens system at a telephoto limit, Dalpha: axial air-equivalent length between a most image side surface of the lens unit alpha and an image surface, fGalpha: focal length of the lens unit alpha, fW and fT: focal lengths of the entire system at a wide-angle limit and a telephoto limit) are satisfied.</abstract><oa>free_for_read</oa></addata></record> |
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subjects | OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS |
title | Zoom lens system, imaging device and camera |
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