Zoom lens, optical apparatus, and method for manufacturing zoom lens
A zoom lens having, in order from an object: a first lens group G1 having positive refractive power; a second lens G2 group having negative refractive power; a third lens group G3 having positive refractive power; and a fourth lens group G4 having positive refractive power, wherein the first lens gr...
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| creator | Arai, Daisaku |
| description | A zoom lens having, in order from an object: a first lens group G1 having positive refractive power; a second lens G2 group having negative refractive power; a third lens group G3 having positive refractive power; and a fourth lens group G4 having positive refractive power, wherein the first lens group moves toward an image once then moves toward the object upon zooming from a wide-angle end state to a telephoto end state, and the following conditional expressions are satisfied: 0.050 < fw / TLw < 0.100 0.10 < ft / TLt < 0.80 0.10 < fw / LG ¢ 2 < 0.64
where fw denotes a focal length of the zoom lens in the wide-angle end state, ft denotes a focal length of the zoom lens in the telephoto end state, TLw denotes a total length of the zoom lens in the wide-angle end state, TLt denotes a total length of the zoom lens in the telephoto end state, and LG2 denotes a lens configuration length of the second lens group G2. |
| format | Patent |
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where fw denotes a focal length of the zoom lens in the wide-angle end state, ft denotes a focal length of the zoom lens in the telephoto end state, TLw denotes a total length of the zoom lens in the wide-angle end state, TLt denotes a total length of the zoom lens in the telephoto end state, and LG2 denotes a lens configuration length of the second lens group G2.]]></description><language>eng ; fre ; ger</language><subject>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS ; OPTICS ; PHYSICS</subject><creationdate>2017</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=20171025&DB=EPODOC&CC=EP&NR=2383598B1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,777,882,25545,76296</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20171025&DB=EPODOC&CC=EP&NR=2383598B1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Arai, Daisaku</creatorcontrib><title>Zoom lens, optical apparatus, and method for manufacturing zoom lens</title><description><![CDATA[A zoom lens having, in order from an object: a first lens group G1 having positive refractive power; a second lens G2 group having negative refractive power; a third lens group G3 having positive refractive power; and a fourth lens group G4 having positive refractive power, wherein the first lens group moves toward an image once then moves toward the object upon zooming from a wide-angle end state to a telephoto end state, and the following conditional expressions are satisfied: 0.050 < fw / TLw < 0.100 0.10 < ft / TLt < 0.80 0.10 < fw / LG ¢ 2 < 0.64
where fw denotes a focal length of the zoom lens in the wide-angle end state, ft denotes a focal length of the zoom lens in the telephoto end state, TLw denotes a total length of the zoom lens in the wide-angle end state, TLt denotes a total length of the zoom lens in the telephoto end state, and LG2 denotes a lens configuration length of the second lens group G2.]]></description><subject>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS</subject><subject>OPTICS</subject><subject>PHYSICS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2017</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZHCJys_PVchJzSvWUcgvKMlMTsxRSCwoSCxKLCkFCiXmpSjkppZk5KcopOUXKeQm5pWmJSaXlBZl5qUrVMG08jCwpiXmFKfyQmluBgU31xBnD93Ugvz41OKCxOTUvNSSeNcAI2MLY1NLCydDYyKUAAA1SDJT</recordid><startdate>20171025</startdate><enddate>20171025</enddate><creator>Arai, Daisaku</creator><scope>EVB</scope></search><sort><creationdate>20171025</creationdate><title>Zoom lens, optical apparatus, and method for manufacturing zoom lens</title><author>Arai, Daisaku</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP2383598B13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>2017</creationdate><topic>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS</topic><topic>OPTICS</topic><topic>PHYSICS</topic><toplevel>online_resources</toplevel><creatorcontrib>Arai, Daisaku</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Arai, Daisaku</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Zoom lens, optical apparatus, and method for manufacturing zoom lens</title><date>2017-10-25</date><risdate>2017</risdate><abstract><![CDATA[A zoom lens having, in order from an object: a first lens group G1 having positive refractive power; a second lens G2 group having negative refractive power; a third lens group G3 having positive refractive power; and a fourth lens group G4 having positive refractive power, wherein the first lens group moves toward an image once then moves toward the object upon zooming from a wide-angle end state to a telephoto end state, and the following conditional expressions are satisfied: 0.050 < fw / TLw < 0.100 0.10 < ft / TLt < 0.80 0.10 < fw / LG ¢ 2 < 0.64
where fw denotes a focal length of the zoom lens in the wide-angle end state, ft denotes a focal length of the zoom lens in the telephoto end state, TLw denotes a total length of the zoom lens in the wide-angle end state, TLt denotes a total length of the zoom lens in the telephoto end state, and LG2 denotes a lens configuration length of the second lens group G2.]]></abstract><oa>free_for_read</oa></addata></record> |
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| language | eng ; fre ; ger |
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| subjects | OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS |
| title | Zoom lens, optical apparatus, and method for manufacturing zoom lens |
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