A catadioptric magnifier with two magnifications for microfiche reading
We have considered the possibility of using four internal reflections in a single lens to reduce its effective focal length by a very large factor. Hence, by using very shallow curvatures on the lens surfaces, it is possible to obtain very high visual magnification for viewing transmission objects s...
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Veröffentlicht in: | Optics and laser technology 1984-10, Vol.16 (5), p.258-260 |
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creator | Murty, M.V.R.K. Moya-Cessa, J. |
description | We have considered the possibility of using four internal reflections in a single lens to reduce its effective focal length by a very large factor. Hence, by using very shallow curvatures on the lens surfaces, it is possible to obtain very high visual magnification for viewing transmission objects such as microfiche. Some details of such a system are presented here, where a lower magnification is obtained for two internal reflections and a higher magnification for four internal reflections. |
doi_str_mv | 10.1016/0030-3992(84)90008-2 |
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Hence, by using very shallow curvatures on the lens surfaces, it is possible to obtain very high visual magnification for viewing transmission objects such as microfiche. 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Hence, by using very shallow curvatures on the lens surfaces, it is possible to obtain very high visual magnification for viewing transmission objects such as microfiche. Some details of such a system are presented here, where a lower magnification is obtained for two internal reflections and a higher magnification for four internal reflections.</description><subject>Exact sciences and technology</subject><subject>Fundamental areas of phenomenology (including applications)</subject><subject>Lenses, prisms, and mirrors</subject><subject>microfiche readers</subject><subject>Optical elements, devices, and systems</subject><subject>optical instruments</subject><subject>Optics</subject><subject>Physics</subject><subject>systems design</subject><issn>0030-3992</issn><issn>1879-2545</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1984</creationdate><recordtype>article</recordtype><recordid>eNp9kM1KAzEURoMoWKtv4GIWIroYzf_MbIRStAoFN7oOmTtJG5mZ1GRq8e1Nbe3SVeByvnvzHYQuCb4jmMh7jBnOWVXRm5LfVhjjMqdHaETKosqp4OIYjQ7IKTqL8SMxXAo2QrNJBnrQjfOrITjIOr3onXUmZBs3LLNh4_9GCXO-j5n1IescBJ9GS5MFk8L94hydWN1Gc7F_x-j96fFt-pzPX2cv08k8B0rLISfMgGY107WouRB1gZlkQhbQCE5qKUFzTKgGUYNtZGMLTuvUkJBGCxBMszG63u1dBf-5NnFQnYtg2lb3xq-jopxInjonkO_A9NMYg7FqFVynw7ciWG2tqa0StVWiSq5-rSmaYlf7_TqCbm3QPbh4yFaYMVaQhD3sMJO6fiVdKoIzPZjGBQODarz7_84PYHOAig</recordid><startdate>19841001</startdate><enddate>19841001</enddate><creator>Murty, M.V.R.K.</creator><creator>Moya-Cessa, J.</creator><general>Elsevier Ltd</general><general>Elsevier Science</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope></search><sort><creationdate>19841001</creationdate><title>A catadioptric magnifier with two magnifications for microfiche reading</title><author>Murty, M.V.R.K. ; Moya-Cessa, J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c228t-13eca3b3ab5b455b70363567cd541b66ca4012ac5bcfd6df742b01611da5c53a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1984</creationdate><topic>Exact sciences and technology</topic><topic>Fundamental areas of phenomenology (including applications)</topic><topic>Lenses, prisms, and mirrors</topic><topic>microfiche readers</topic><topic>Optical elements, devices, and systems</topic><topic>optical instruments</topic><topic>Optics</topic><topic>Physics</topic><topic>systems design</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Murty, M.V.R.K.</creatorcontrib><creatorcontrib>Moya-Cessa, J.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><jtitle>Optics and laser technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Murty, M.V.R.K.</au><au>Moya-Cessa, J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A catadioptric magnifier with two magnifications for microfiche reading</atitle><jtitle>Optics and laser technology</jtitle><date>1984-10-01</date><risdate>1984</risdate><volume>16</volume><issue>5</issue><spage>258</spage><epage>260</epage><pages>258-260</pages><issn>0030-3992</issn><eissn>1879-2545</eissn><coden>OLTCAS</coden><abstract>We have considered the possibility of using four internal reflections in a single lens to reduce its effective focal length by a very large factor. Hence, by using very shallow curvatures on the lens surfaces, it is possible to obtain very high visual magnification for viewing transmission objects such as microfiche. Some details of such a system are presented here, where a lower magnification is obtained for two internal reflections and a higher magnification for four internal reflections.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/0030-3992(84)90008-2</doi><tpages>3</tpages></addata></record> |
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subjects | Exact sciences and technology Fundamental areas of phenomenology (including applications) Lenses, prisms, and mirrors microfiche readers Optical elements, devices, and systems optical instruments Optics Physics systems design |
title | A catadioptric magnifier with two magnifications for microfiche reading |
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