Long-wavelength cutoff filters of a new type
Identifieur interne : 013D28 ( Main/Repository ); précédent : 013D27; suivant : 013D29Long-wavelength cutoff filters of a new type
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Abstract
A method for the design of cutoff filters is proposed that is based on the use of light at nonnormal angles of incidence and on the use of coating materials with a large dispersion of the optical constants. The optical constants are presented of several films made from indium tin oxide-a material that satisfies this requirement. The filtering is due to absorption, critical angle effects, or both. The theory of this type of filter is described, and the calculated performance of two long-wavelength cutoff filters based on the use of indium tin oxide films is given. The angular performance and the producibility of one of these filters are examined. Some applications for these filters are considered, and the feasibility of producing similar filters for other spectral regions is discussed. © 1999 Optical Society of America
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Dobrowolski</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute for Microstructural Sciences, National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada</s1><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country xml:lang="fr">Canada</country><wicri:regionArea>Institute for Microstructural Sciences, National Research Council of Canada, Ottawa, Ontario K1A 0R6</wicri:regionArea><wicri:noRegion>Ontario K1A 0R6</wicri:noRegion></affiliation></author><author><name sortKey="Li, Li" uniqKey="Li L">Li Li</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Institute for Microstructural Sciences, National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada</s1><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country xml:lang="fr">Canada</country><wicri:regionArea>Institute for Microstructural Sciences, National Research Council of Canada, Ottawa, Ontario K1A 0R6</wicri:regionArea><wicri:noRegion>Ontario K1A 0R6</wicri:noRegion></affiliation></author><author><name sortKey="Hilfiker, James N" uniqKey="Hilfiker J">James N. Hilfiker</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>J. A. Woollam Company, Inc., Suite 102, 645 M Street, Lincoln, Nebraska 68508</s1><sZ>3 aut.</sZ></inist:fA14><country xml:lang="fr">États-Unis</country><placeName><region type="state">Nebraska</region></placeName><wicri:cityArea>J. A. Woollam Company, Inc., Suite 102, 645 M Street, Lincoln</wicri:cityArea></affiliation></author></titleStmt><publicationStmt><idno type="inist">99-0492502</idno><date when="1999-08-01">1999-08-01</date><idno type="stanalyst">PASCAL 99-0492502 AIP</idno><idno type="RBID">Pascal:99-0492502</idno><idno type="wicri:Area/Main/Corpus">014265</idno><idno type="wicri:Area/Main/Repository">013D28</idno></publicationStmt><seriesStmt><idno type="ISSN">0003-6935</idno><title level="j" type="abbreviated">Appl. opt.</title><title level="j" type="main">Applied optics</title></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Absorption coefficients</term><term>Infrared spectra</term><term>Instrumentation</term><term>Light transmission</term><term>Metal-insulator boundaries</term><term>Optical filters</term><term>Refractive index</term><term>Theoretical study</term><term>Visible spectra</term><term>optical multilayers</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>4279C</term><term>4279W</term><term>7820C</term><term>Appareillage</term><term>Etude théorique</term><term>Filtre optique</term><term>Spectre IR</term><term>Spectre visible</term><term>Interface métal isolant</term><term>Coefficient absorption</term><term>Transmission lumière</term><term>Indice réfraction</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">A method for the design of cutoff filters is proposed that is based on the use of light at nonnormal angles of incidence and on the use of coating materials with a large dispersion of the optical constants. The optical constants are presented of several films made from indium tin oxide-a material that satisfies this requirement. The filtering is due to absorption, critical angle effects, or both. The theory of this type of filter is described, and the calculated performance of two long-wavelength cutoff filters based on the use of indium tin oxide films is given. The angular performance and the producibility of one of these filters are examined. Some applications for these filters are considered, and the feasibility of producing similar filters for other spectral regions is discussed. © 1999 Optical Society of America</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0003-6935</s0></fA01><fA02 i1="01"><s0>APOPAI</s0></fA02><fA03 i2="1"><s0>Appl. opt.</s0></fA03><fA05><s2>38</s2></fA05><fA06><s2>22</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Long-wavelength cutoff filters of a new type</s1></fA08><fA11 i1="01" i2="1"><s1>DOBROWOLSKI (J. 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All rights reserved.</s1></fA44><fA47 i1="01" i2="1"><s0>99-0492502</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Applied optics</s0></fA64><fA66 i1="01"><s0>USA</s0></fA66><fC01 i1="01" l="ENG"><s0>A method for the design of cutoff filters is proposed that is based on the use of light at nonnormal angles of incidence and on the use of coating materials with a large dispersion of the optical constants. The optical constants are presented of several films made from indium tin oxide-a material that satisfies this requirement. The filtering is due to absorption, critical angle effects, or both. The theory of this type of filter is described, and the calculated performance of two long-wavelength cutoff filters based on the use of indium tin oxide films is given. The angular performance and the producibility of one of these filters are examined. 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