ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME
The zoom lens includes, in order from object side to image side, a positive first lens unit, a negative second lens unit, a positive third lens unit, and a rear lens group including at least one lens unit, in which intervals between adjacent lens units are changed during zooming. The third lens unit...
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| creator | Sudo, Kenta |
| description | The zoom lens includes, in order from object side to image side, a positive first lens unit, a negative second lens unit, a positive third lens unit, and a rear lens group including at least one lens unit, in which intervals between adjacent lens units are changed during zooming. The third lens unit includes at least two negative lenses and at least three positive lenses. An average value of partial dispersion ratios of two negative lenses having strongest refractive powers of the at least two negative lenses, an average value of partial dispersion ratios of three positive lenses having strongest refractive powers of the at least three positive lenses, an average value of Abbe numbers of the two negative lenses, an average value of Abbe numbers of the three positive lenses, a back focus, and a focal length of zoom lens at wide angle end are appropriately set. |
| format | Patent |
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The third lens unit includes at least two negative lenses and at least three positive lenses. An average value of partial dispersion ratios of two negative lenses having strongest refractive powers of the at least two negative lenses, an average value of partial dispersion ratios of three positive lenses having strongest refractive powers of the at least three positive lenses, an average value of Abbe numbers of the two negative lenses, an average value of Abbe numbers of the three positive lenses, a back focus, and a focal length of zoom lens at wide angle end are appropriately set.</description><language>eng</language><subject>ELECTRIC COMMUNICATION TECHNIQUE ; ELECTRICITY ; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS ; OPTICS ; PHYSICS ; PICTORIAL COMMUNICATION, e.g. TELEVISION</subject><creationdate>2020</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=20201105&DB=EPODOC&CC=US&NR=2020348495A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20201105&DB=EPODOC&CC=US&NR=2020348495A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Sudo, Kenta</creatorcontrib><title>ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME</title><description>The zoom lens includes, in order from object side to image side, a positive first lens unit, a negative second lens unit, a positive third lens unit, and a rear lens group including at least one lens unit, in which intervals between adjacent lens units are changed during zooming. 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An average value of partial dispersion ratios of two negative lenses having strongest refractive powers of the at least two negative lenses, an average value of partial dispersion ratios of three positive lenses having strongest refractive powers of the at least three positive lenses, an average value of Abbe numbers of the two negative lenses, an average value of Abbe numbers of the three positive lenses, a back focus, and a focal length of zoom lens at wide angle end are appropriately set.</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>2020</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDCJ8vf3VfBx9QtWcPRzUfD0dXR3VQjwdPYODVBwDAhwDHIMCQ1W8HAM8_RzVwjxcFUIdvR15WFgTUvMKU7lhdLcDMpuriHOHrqpBfnxqcUFicmpeakl8aHBRgZGBsYmFiaWpo6GxsSpAgA_cSgH</recordid><startdate>20201105</startdate><enddate>20201105</enddate><creator>Sudo, Kenta</creator><scope>EVB</scope></search><sort><creationdate>20201105</creationdate><title>ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME</title><author>Sudo, Kenta</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US2020348495A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2020</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>Sudo, Kenta</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Sudo, Kenta</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME</title><date>2020-11-05</date><risdate>2020</risdate><abstract>The zoom lens includes, in order from object side to image side, a positive first lens unit, a negative second lens unit, a positive third lens unit, and a rear lens group including at least one lens unit, in which intervals between adjacent lens units are changed during zooming. 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| subjects | ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION |
| title | ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME |
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