OBJECTIVE
An objective lens system ( 2 ), particularly for a fingerprint reader apparatus, said lens system ( 2 ) comprising a first lens ( 8 ) formed as a condensing lens guiding light beams arriving from an object generally telecentrically, an aperture stop ( 9 ) having a centre (P) and being located in the...
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| creator | KALLO PETER |
| description | An objective lens system ( 2 ), particularly for a fingerprint reader apparatus, said lens system ( 2 ) comprising a first lens ( 8 ) formed as a condensing lens guiding light beams arriving from an object generally telecentrically, an aperture stop ( 9 ) having a centre (P) and being located in the vicinity of a focal point of the first lens ( 8 ), a correcting second lens ( 10 ) arranged between the first lens ( 8 ) and the aperture stop ( 9 ) and juxtaposed with the aperture stop ( 9 ), and a correcting third lens ( 11 ) formed as a condensing lens and arranged beside the aperture stop ( 9 ) opposite the second lens ( 10 ). According to the invention, the second lens ( 10 ) is a condensing lens with a spherical surface (S3) facing the first lens ( 8 ), wherein the curvature centre of the surface (S3) is at a distance shorter than 15% of the curvature radius of the surface (S3) from the centre (P) of the aperture stop ( 9 ), and the aperture stop ( 9 ) is arranged at a distance shorter than 25% of the focal length of the first lens ( 8 ) from the focal point of the first lens ( 8 ). |
| format | Patent |
| fullrecord | <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_HUP9903937A2</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>HUP9903937A2</sourcerecordid><originalsourceid>FETCH-epo_espacenet_HUP9903937A23</originalsourceid><addsrcrecordid>eNrjZOD0d_JydQ7xDHPlYWBNS8wpTuWF0twMim6uIc4euqkF-fGpxQWJyal5qSXxHqEBlpYGxpbG5o5GxsSoAQBI9xv3</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>OBJECTIVE</title><source>esp@cenet</source><creator>KALLO PETER</creator><creatorcontrib>KALLO PETER</creatorcontrib><description>An objective lens system ( 2 ), particularly for a fingerprint reader apparatus, said lens system ( 2 ) comprising a first lens ( 8 ) formed as a condensing lens guiding light beams arriving from an object generally telecentrically, an aperture stop ( 9 ) having a centre (P) and being located in the vicinity of a focal point of the first lens ( 8 ), a correcting second lens ( 10 ) arranged between the first lens ( 8 ) and the aperture stop ( 9 ) and juxtaposed with the aperture stop ( 9 ), and a correcting third lens ( 11 ) formed as a condensing lens and arranged beside the aperture stop ( 9 ) opposite the second lens ( 10 ). According to the invention, the second lens ( 10 ) is a condensing lens with a spherical surface (S3) facing the first lens ( 8 ), wherein the curvature centre of the surface (S3) is at a distance shorter than 15% of the curvature radius of the surface (S3) from the centre (P) of the aperture stop ( 9 ), and the aperture stop ( 9 ) is arranged at a distance shorter than 25% of the focal length of the first lens ( 8 ) from the focal point of the first lens ( 8 ).</description><edition>7</edition><language>eng ; hun</language><creationdate>2001</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=20011228&DB=EPODOC&CC=HU&NR=P9903937A2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20011228&DB=EPODOC&CC=HU&NR=P9903937A2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>KALLO PETER</creatorcontrib><title>OBJECTIVE</title><description>An objective lens system ( 2 ), particularly for a fingerprint reader apparatus, said lens system ( 2 ) comprising a first lens ( 8 ) formed as a condensing lens guiding light beams arriving from an object generally telecentrically, an aperture stop ( 9 ) having a centre (P) and being located in the vicinity of a focal point of the first lens ( 8 ), a correcting second lens ( 10 ) arranged between the first lens ( 8 ) and the aperture stop ( 9 ) and juxtaposed with the aperture stop ( 9 ), and a correcting third lens ( 11 ) formed as a condensing lens and arranged beside the aperture stop ( 9 ) opposite the second lens ( 10 ). According to the invention, the second lens ( 10 ) is a condensing lens with a spherical surface (S3) facing the first lens ( 8 ), wherein the curvature centre of the surface (S3) is at a distance shorter than 15% of the curvature radius of the surface (S3) from the centre (P) of the aperture stop ( 9 ), and the aperture stop ( 9 ) is arranged at a distance shorter than 25% of the focal length of the first lens ( 8 ) from the focal point of the first lens ( 8 ).</description><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2001</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZOD0d_JydQ7xDHPlYWBNS8wpTuWF0twMim6uIc4euqkF-fGpxQWJyal5qSXxHqEBlpYGxpbG5o5GxsSoAQBI9xv3</recordid><startdate>20011228</startdate><enddate>20011228</enddate><creator>KALLO PETER</creator><scope>EVB</scope></search><sort><creationdate>20011228</creationdate><title>OBJECTIVE</title><author>KALLO PETER</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_HUP9903937A23</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; hun</language><creationdate>2001</creationdate><toplevel>online_resources</toplevel><creatorcontrib>KALLO PETER</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>KALLO PETER</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>OBJECTIVE</title><date>2001-12-28</date><risdate>2001</risdate><abstract>An objective lens system ( 2 ), particularly for a fingerprint reader apparatus, said lens system ( 2 ) comprising a first lens ( 8 ) formed as a condensing lens guiding light beams arriving from an object generally telecentrically, an aperture stop ( 9 ) having a centre (P) and being located in the vicinity of a focal point of the first lens ( 8 ), a correcting second lens ( 10 ) arranged between the first lens ( 8 ) and the aperture stop ( 9 ) and juxtaposed with the aperture stop ( 9 ), and a correcting third lens ( 11 ) formed as a condensing lens and arranged beside the aperture stop ( 9 ) opposite the second lens ( 10 ). According to the invention, the second lens ( 10 ) is a condensing lens with a spherical surface (S3) facing the first lens ( 8 ), wherein the curvature centre of the surface (S3) is at a distance shorter than 15% of the curvature radius of the surface (S3) from the centre (P) of the aperture stop ( 9 ), and the aperture stop ( 9 ) is arranged at a distance shorter than 25% of the focal length of the first lens ( 8 ) from the focal point of the first lens ( 8 ).</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| language | eng ; hun |
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| title | OBJECTIVE |
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