Infrared Patents (Class 252/587)
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Patent number: 5013487Abstract: Blue-colored, infrared radiation absorbing glass compositions are prepared by the addition of zinc sulfide and zinc oxide to glass compositions containing iron. The zinc sulfide acts as a reducing agent, to maintain a portion of the iron in the ferrous state, and the zinc oxide prevents amber coloration of the glass which would otherwise occur due to the addition of the zinc sulfide to the glass batch.Type: GrantFiled: October 10, 1989Date of Patent: May 7, 1991Assignee: Libbey-Owens-Ford Co.Inventor: J. Joseph Cheng
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Patent number: 5011623Abstract: A nonlinear optical material is provided by mixing a polymer liquid crystal having a chiral center and a nonlinear optical compound. The polymer liquid crystal may be a ferroelectric polymer liquid crystal. The nonlinear optical material is preferably in the form of a solid solution. A nonlinear optical device is formed by orienting the nonlinear optical material to provide an optical member.Type: GrantFiled: July 18, 1989Date of Patent: April 30, 1991Assignee: Canon Kabushiki KaishaInventors: Kazuo Yoshinaga, Takashi Kai, Koichi Egara, Yomishi Toshida, Hideaki Mitsutake, Koichi Sato, Takeshi Miyazaki
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Patent number: 5007689Abstract: Infrared transmitting optical components having a wide variety of substrates (e.g. ZnS, ZnSe, Ge, Si, SiO.sub.2) are disclosed all with an optical coating of boron phosphide (BP). The boron phosphide may be a single layer coating or one layer of a multilayer coating in which case it is preferably the penultimate layer. Coated components are provided which are very low in absorption, which are operable at high temperatures with minimal transmission loss, and which are transmitting in two IR wavebands. The boron phosphide layer is deposited by plasma-assisted chemical vapor deposition at a temperature in the range 300.degree.-500.degree. C. preferably using feedstock gases which are hydrogen-fee. Boron phosphide coatings of up to 40 .mu.m in thickness have been achieved.Type: GrantFiled: August 30, 1989Date of Patent: April 16, 1991Assignees: Barr & Stroud, The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern IrelandInventors: Christopher J. Kelly, Keith L. Lewis
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Patent number: 5000878Abstract: Spirooxazine compounds are incorporated into a plastic host comprised of copolymers of poly(vinyl alcohol) and poly(vinyl acetate). This combination results in a photochromic composite which exhibits significantly improved temperature stability relative to the prior art.Type: GrantFiled: February 24, 1989Date of Patent: March 19, 1991Assignee: American Optical CorporationInventor: Nori Y. C. Chu
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Patent number: 4999139Abstract: A nonlinear optical device having an optical medium and an optical element including a polarizer, an optical resonator and a reflector is provided. The optical medium includes an organic nonlinear optical material represented by a formula: ##STR1## wherein each of R.sub.1 and R.sub.2 is an alkyl group having 2 to 6 carbon atoms or a hydroxyalkyl group having 2 to 6 carbon atoms, R.sub.1 and R.sub.2 being same or different groups; or R.sub.1 is an ethyl group and R.sub.2 is an acryloyloxyethyl group (CH.sub.2 .dbd.CH--COO--CH.sub.2 CH.sub.2 --) or a methacryloyloxyethyl group (CH.sub.2 .dbd.C(CH.sub.3)--COO--CH.sub.2 CH.sub.2 --); and each of X.sub.1, X.sub.2, X.sub.3, and X.sub.4 is individually a hydrogen atom, a hydroxyl group, a halogen atom, an alkyl group, an alkoxy group, an alkyl ester group, or an alkylamide group, where X.sub.1, X.sub.2, X.sub.3 and X.sub.4 may be the same or different groups.Type: GrantFiled: February 16, 1990Date of Patent: March 12, 1991Assignee: Nippon Telegraph and Telephone CorporationInventors: Takashi Kurihara, Shiro Matsumoto, Toshikuni Kainou, Hirohisa Kanbara, Kenichi Kubodera
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Patent number: 4997595Abstract: An organic nonlinear optical device having a nitrostyrene compound represented by a formula: ##STR1## wherein R.sub.1 is an ethyl group R.sub.2 is a group selected from the group consisting of an acryloyloxyethyl group (CH.sub.2 .dbd.CH--COO--CH.sub.2 CH.sub.2 --) and a methacryloyloxyethyl group (CH.sub.2 .dbd.C(CH.sub.3)--COO--CH.sub.2 CH.sub.2 --); and X.sub.1, X.sub.2, X.sub.3, and X.sub.4 are the same or different and each is selected from the group consisting of a hydrogen atom, a hydroxyl group, a halogen atom, an alkyl group, an alkoxy group, an alkyl ester group, and an alkylamide group, is provided.Type: GrantFiled: February 16, 1990Date of Patent: March 5, 1991Assignee: Nippon Telegraph and Telephone CorporationInventors: Takashi Kurihara, Shiro Matsumoto, Toshikuni Kaino, Hirohisa Kanbara, Kenichi Kubodera
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Patent number: 4994209Abstract: An organic nonlinear optical material which is an optically transparent solid solution comprising (a) an organic compound component exhibiting nonlinear optical response represented by formula (I): ##STR1## wherein Z.sup.1 represents an atomic group, which together with the adjacent carbon atom, forms a substituted or unsubstituted 5- to 6-membered aromatic ring having at least one nitro group as a substituent; and Z.sup.2 represents an atomic group, which together with the adjacent nitrogen atom, forms a substituted or unsubstituted pyrrole, imidazole, pyrazole, triazole or tetrazole ring, and (b) a polymer. The nonlinear optical material exhibits high nonlinear optical response and excellent transmission to blue light.Type: GrantFiled: August 22, 1988Date of Patent: February 19, 1991Assignee: Fuji Photo Film Co., Ltd.Inventor: Masaki Okazaki
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Patent number: 4992203Abstract: Optical elements having non-linear optical properties comprising a compound of the formula: ##STR1## wherein D is an electron donorA is an electron acceptor;and W, X, Y and Z are each independently H or any group capable of attachment to the pyrazolyl ring; in which the molecules of the compound are aligned so that the element has a net non-centrosymmetry, a method for their preparation, optical devices comprising such elements, and compounds of formula I.Type: GrantFiled: October 13, 1989Date of Patent: February 12, 1991Assignee: Imperial Chemical Industries PLCInventors: Simon Allen, Paul F. Gordon, John O. Morley
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Patent number: 4992214Abstract: Optically nonlinear aromatic carboxylic acid cocrystals are provided of the formula: ##STR1## wherein each R is CN or NO.sub.2, n is 1-4, m is 1-3 and X and Y are individually (C.sub.1 -C.sub.3)alkyl, (C.sub.1 -C.sub.3)alkanolyl, (C.sub.1 -C.sub.3)alkoxycarbonyl, ar(C.sub.1 -C.sub.5)alkyl, aryl, (C.sub.1 -C.sub.3)alkoxy, hydroxy, halo or mixtures thereof.Type: GrantFiled: October 13, 1988Date of Patent: February 12, 1991Assignee: Regents of the University of MinnesotaInventors: Margaret C. Etter, Gayle M. Frankenbach
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Patent number: 4992202Abstract: Optical elements having non-linear optical properties comprising a compound of the formula: ##STR1## wherein E is an electron donorA is an electron acceptor;and W, X, Y & Z are each independently H or any group capable of attachment to the pyrazolyl ring; in which the molecules of the compound are aligned so that the element has a net non-centrosymmetry, a method for their preparation, optical devices comprising such elements, and compounds of formula I.Type: GrantFiled: October 13, 1989Date of Patent: February 12, 1991Assignee: Imperial Chemical Industries PLCInventors: Simon Allen, Paul F. Gordon, John O. Morley
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Patent number: 4986935Abstract: A wavelength converting device exhibiting high activity for SHG is disclosed, which comprises a compound represented by formula (I) ##STR1## where Ar represents the residue of a .pi.-electron conjugated molecule; and X represents a hydroxyl group, an alkoxy group, or a halogen atom.Type: GrantFiled: December 15, 1989Date of Patent: January 22, 1991Assignee: Fuji Xerox Co., Ltd.Inventors: Kentaro Ageishi, Lyong S. Pu
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Patent number: 4985179Abstract: An optical material obtained by electrically polarizing a high polymer molded article obtained from a composition comprising a copolymer of vinylidene cyanide and at least one comonomer selected from vinyl compounds, other vinylidene compounds and dienes having uniformly dispersed therein from 0.1 to 70% by weight of an organic molecular crystal having nonlinear optical effects, with the total amount of the copolymer and the organic molecular crystal being 100% by weight. The optical material has excellent orientation of the organic molecular crystal, great nonlinear optical effects, and excellent moldability.Type: GrantFiled: May 31, 1989Date of Patent: January 15, 1991Assignee: Mitsubishi Petrochemical Co., Ltd.Inventors: Iwao Seo, Kenji Nakajima, Manabu Kishimoto
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Patent number: 4985178Abstract: A nonlinear optical element comprising 3-methyl-4-methoxy-4'-nitrostilbene useful for nonlinear optical and electro-optic effects.Type: GrantFiled: September 1, 1989Date of Patent: January 15, 1991Assignee: E. I. du Pont de Nemours and CompanyInventor: Wilson Tam
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Patent number: 4983318Abstract: This invention relates to a method for electric field orientation of liquid crystal polymers and oriented materials of liquid crystal polymers obtained by the method. This electric field orientation method comprises applying a pulsating electric field which is predominantly unidirectional and whose magnitude is varying periodically or non-periodically to a liquid crystal polymer capable of forming an optically anisotropic melt phase. The oriented material of liquid crystal polymer thus obtained has been unidirectionally oriented and polarized. This oriented, polarized material of liquid crystal polymer can be utilized as a piezoelectric material, pyroelectric material, electret material, non-linear optical element or the like.Type: GrantFiled: June 3, 1988Date of Patent: January 8, 1991Assignee: Kuraray Co., Ltd.Inventors: Mitsuo Matsumoto, Kiyoto Ohtsuka, Koichi Sato, Takuji Okaya
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Patent number: 4983325Abstract: In one embodiment this invention provides a high performance nonlinear optical medium which comprises a transparent organic polymer film containing an array of charge asymmetric molecules such as 13,13-diamino-14,14-dicyanodiphenoquinodimethane: ##STR1##Type: GrantFiled: April 4, 1989Date of Patent: January 8, 1991Assignee: Hoechst Celanese Corp.Inventors: Eui W. Choe, Alan Buckley, Dagobert E. Stuetz, Anthony F. Garito
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Patent number: 4983324Abstract: Non-linear optical materials contain the structural elements of the general formula I and/or I' ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.3', R.sup.4, R.sup.5, R.sup.6, R.sup.7 and Z have the meaning indicated in patent claim 1.Type: GrantFiled: November 25, 1988Date of Patent: January 8, 1991Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Heinz Durr, Volker Bach
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Patent number: 4981613Abstract: A light source composed of a semiconductor laser and a nonlinear optical element which converts a laser beam emitted from the semiconductor laser to a laser beam having a shorter wavelength, disposed in the path of a laser beam produced by the laser, the nonlinear optical element containing a compound represented by formula (I): ##STR1## wherein Z.sup.1, Z.sup.2, X and n are as defined in the specification, of formula (II) ##STR2## wherein Z.sup.3 and Z.sup.4 are defined in the specification, or an acid adduct therefore. the nonlinear optical element exhibits high transmittances to blue light and generates a laser beam having a shorter wavelength than that of the laser applied.Type: GrantFiled: November 4, 1987Date of Patent: January 1, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Masaki Okazaki, Seiiti Kubodera
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Patent number: 4981614Abstract: An organic guest compound having both an electron attractive group and an electron donative group is blended with a host polymer selected from a lactone polymer and a copolymer nylon to form a solid solution. The solid solution shows good mechanical strength and processability and may be suitably formed into a nonlinear optical device. Even if the guest compound is a compound, such as p-nitroaniline, which has a large non-linearity but is by itself liable to form a centrosymmetrical crystal thus showing no SHG activity, the solid solution obtained by blending it with the host polymer can show a uniform and large SHG activity.Type: GrantFiled: September 16, 1988Date of Patent: January 1, 1991Assignee: Canon Kabushiki KaishaInventors: Takeshi Miyazaki, Seizo Miyata
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Patent number: 4975223Abstract: An optical material of a high refractive index is formed of a copolymer obtained by copolymerizing 3-40 wt. % of 4-isopropenylbiphenyl, 30-97 wt. % of a monofunctional aromatic monomer represented by the following formula (I) or (II) and 0-67 wt. % of another monomer copolymerizable with 4-isopropenylbiphenyl and the monofunctional aromatic monomer. ##STR1## wherein R means a hydrogen atom or methyl group, X denotes ##STR2## in which n stands for an integer of 0-3, Y is a halogen atom other than a fluorine atom, or a methyl, hydroxyl or methoxy group, and m stands for an integer of 0-3, with the proviso that Y may be different from each other when m is 2 or 3.Type: GrantFiled: February 3, 1989Date of Patent: December 4, 1990Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Hideaki Doi, Teruo Sakagami
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Patent number: 4973429Abstract: A material in the form of a film is described which contains, in an orientated arrangement which does not display point symmetry, compounds of formula I ##STR1## wherein X is .dbd.CH-- or .dbd.N--, R.sup.1 is C.sub.12 -C.sub.30 -alkyl, R.sup.2 is hydrogen or C.sub.1 -C.sub.30 -alkyl, R.sup.3 is --NO.sub.2, --CN, --CF.sub.3, --COCF.sub.3, --SO.sub.2 CH.sub.3 or --SO.sub.2 CF.sub.3, R.sup.4 is hydrogen or is defined in the same way as R.sup.3, R.sup.5 is hydrogen or --NR.sup.6 R.sup.7 and R.sup.6 and R.sup.7 independently of one another are hydrogen or C.sub.1 -C.sub.30 -alkyl, it also being possible for any of the alkyl radicals to be partially fluorinated or perfluorinated.The compounds of formula I can be arranged in Langmuir-Blodgett layer systems. Such systems can be used for example for the manufacture of opto-electronic units.Type: GrantFiled: February 15, 1989Date of Patent: November 27, 1990Assignee: Ciba-Geigy CorporationInventors: Gero Decher, Bernd Tieke, Christian Bosshard, Peter Gunter
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Patent number: 4966730Abstract: Certain derivatives of stilbene and diphenylacetylene are capable of second harmonic generation when illuminated by coherent optical radiation.Type: GrantFiled: December 20, 1989Date of Patent: October 30, 1990Assignee: E. I. Du Pont de Nemours and CompanyInventors: Robert A. Clement, Wilson Tam, Ying Wang
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Patent number: 4965434Abstract: (1) a composition for forming a far-infrared-emitting layer, the composition comprising (i) a liquid composition which contains a ceramics-forming material and which is capable of forming a ceramics layer by gelation induced by polymerization and (ii) at least one pigment capable of emitting far-infrared radiation; and(2) a far-infrared heater comprising a heat source, and a protective means which has a far-infrared-emitting layer formed thereon by applying thereto the composition as defined above in (1) to cause gelation of the coating layer by polymerization.Type: GrantFiled: April 4, 1989Date of Patent: October 23, 1990Assignees: Matsushita Electric Industrial Co., Ltd., Shima Trading Co., Ltd., Parker Kako Co., Ltd.Inventors: Shoichi Nomura, Akira Kitagawa, Hidekata Kawanishi, Tsuneo Shibata
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Patent number: 4965020Abstract: Optical elements comprising a non-centrosymmetric compound comprising an electron donor and an electron acceptor linked by a conjugated bridging group, in which the electron acceptor is a nitroso group, in which element the molecules of the compound are aligned so that the element has a net non-centrosymmetry, a method for their preparation, optical devices comprising such elements, and some of the compounds.Type: GrantFiled: February 4, 1987Date of Patent: October 23, 1990Assignee: Imperial Chemical Industries PLCInventors: Simon Allen, Paul F. Gordon, John O. Morley
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Patent number: 4961631Abstract: Certain derivatives of stilbene are capable of second harmonic generation when illuminated by coherent optical radiation.Type: GrantFiled: November 16, 1989Date of Patent: October 9, 1990Assignee: E. I Du Pont de Nemours and CompanyInventors: Robert A. Clement, Wilson Tam, Ying Wang
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Patent number: 4960538Abstract: Disclosed are near-infrared absorbents comprising 1,2-naphthalocyanine derivatives wherein the four naphthalene rings contained in the molecule independently have 1 to 6 substituents. Also disclosed is the use of these near-infrared absorbents in optical recording media, near-infrared absorption filters and display materials.Type: GrantFiled: October 20, 1988Date of Patent: October 2, 1990Assignees: Mitsui Toatsu Chemicals, Inc, Yamamoto Chemicals, Inc.Inventors: Hisato Itoh, Takahisa Oguchi, Katashi Enomoto, Masakatsu Nakatsuka, Tsutomu Nishizawa
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Patent number: 4957655Abstract: In a preferred embodiment this invention provides a second order nonlinear optical film medium which consists of a thermoplastic copolymer which has a crystallographic molecular alignment, and a net dipolar molecular orientation normal to the film plane. The crystallographic molecular alignment is formed by axial mechanical stressing, and the dipolar molecular orientation is induced by an electric or magnetic field.Type: GrantFiled: January 12, 1989Date of Patent: September 18, 1990Assignee: Hoechst Celanese Corp.Inventors: Garo Khanarian, Donald Raskin, Alan Buckley, Gordon W. Calundann, Anthony J. East
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Patent number: 4954288Abstract: This invention provides novel side chain liquid crystalline polymers. An invention polymer exhibits nonlinear optical response, and has utility as a transparent nonlinear optical component in optical light switch and light modulator devices.Type: GrantFiled: November 14, 1989Date of Patent: September 4, 1990Assignee: Hoechst Celanese Corp.Inventor: Anthony J. East
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Patent number: 4948532Abstract: This invention provides novel sidechain liquid crystalline polymers which exhibit nonlinear response, and which have utility as a transparent nonlinear optical component in optical light switch and light modulator devices.Type: GrantFiled: March 14, 1989Date of Patent: August 14, 1990Assignee: Hoechst Celanese Corp.Inventors: Ronald N. DeMartino, Hyun-Nam Yoon, James B. Stamatoff
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Patent number: 4944896Abstract: This invention provides novel side chain liquid crystalline polymers which exhibit nonlinear optical response, and which have utility as a transparent optical component in electrooptic light modulator devices.Type: GrantFiled: July 13, 1988Date of Patent: July 31, 1990Assignee: Hoechst Celanese Corp.Inventors: Ronald N. DeMartino, Hyun-Nam Yoon, James B. Stamatoff, Alan Buckley
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Patent number: 4941996Abstract: Inclusion complexes, comprising a host and a guest, that exhibit greater second harmonic generation efficiency than either the host or the guest exhibits by itself. Preferred hosts can be selected from cyclodextrins, cyclodextrin derivatives, and cyclodextrin polymers. Preferred guests can be selected from aromatic compounds in which the molecule contains both an electron-donating functional group and an electron-withdrawing functional group.Type: GrantFiled: October 19, 1987Date of Patent: July 17, 1990Assignee: Minnesota Mining and Manufacturing CompanyInventors: John E. Trend, Kent B. Rochford
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Patent number: 4938896Abstract: In one embodiment this invention provides a high performance nonlinear optical medium which comprises a transparent organic polymer film containing an array of charge asymmetric molecules such as 13,13-diamino-14,14-dicyanodiphenoquinodimethane: ##STR1##Type: GrantFiled: March 20, 1989Date of Patent: July 3, 1990Assignee: Hoechst Celanese Corp.Inventors: Eui W. Choe, Alan Buckley, Dagobert E. Stuetz, Anthony F. Garito
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Patent number: 4933110Abstract: Optical light filters, useful for eye protection from laser radiation, are provided. The filter can absorb harmful radiation from lasers of several (at least six (6)) types which have a range of different specific wavelengths, yet permit sufficient visibility. A novel mixture of compatible absorbers in a transparent plastic carrier, having the required stability to withstand processing conditions and having satisfactory stability for use under environmental conditions is disclosed.Type: GrantFiled: December 28, 1988Date of Patent: June 12, 1990Assignee: American Cyanamid CompanyInventor: Robert J. Tucker
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Patent number: 4933112Abstract: This invention provides novel sidechain liquid crystalline polymers which exhibit nonlinear response, and which have utility as a transparent nonlinear optical component in optical light switch and light modular devices.Type: GrantFiled: March 14, 1989Date of Patent: June 12, 1990Assignee: Hoechst Celanese Corp.Inventors: Ronald N. DeMartino, Hyun-Nam Yoon, James B. Stamatoff
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Patent number: 4923638Abstract: A near infrared absorbing composition is disclosed, containing at least one compound represented by general formula (I), having its absorption maxima at wavelengths of 720 nm or more: ##STR1## wherein R.sup.1 represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group; R.sup.2 and R.sup.5, which may be the same or different, each represents a hydrogen atom or a group capable of substituting a hydrogen atom; R.sup.3 and R.sup.4, which may be the same or different, each represents a hydrogen atom, a halogen atom, a substituted or unsubstituted alkoxy group or a substituted or unsubstituted alkyl group with the proviso that they do not simultaneously represent hydrogen atoms; and R.sup.6 and R.sup.7, which may be the same or different, each represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, an acyl group or a sulfonyl group, or R.sup.6 and R.sup.Type: GrantFiled: March 28, 1989Date of Patent: May 8, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeru Ohno, Yuji Mihara, Keiichi Adachi, Toshinao Ukai, Gouichi Hayashi
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Patent number: 4921317Abstract: The present invention relates to a metal complex compound useful in an infrared absorbent prepared by coordinating two bidentate ligands of the following formula (iii): ##STR1## wherein R.sup.1 and R.sup.2 each independently represents a hydrogen atom, a cyano group, or a substituted or unsubstituted alkyl, aryl or heterocyclic group, which may be the same or different.The present invention is further directed to an infrared absorbing composition comprising a metal complex compound prepared by coordinating two bidentate ligands of formula (iii) above to a center metal and neutralizing a complex ion with a cation.The present invention is also directed to an infrared absorbing article which comprises a metal complex compound prepared by coordinating two bidentate ligands of formula (iii) above to a center metal and neutralizing such a complex with a phosphonium cation.Type: GrantFiled: July 6, 1988Date of Patent: May 1, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshiaki Suzuki, Gouichi Hayashi
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Patent number: 4913845Abstract: In one embodiment this invention provides an nonlinear optical medium which is a composite of a polymer matrix which exhibits nonlinear optic response, and a silver colloid which is dispersed in the polymer matrix.Type: GrantFiled: January 10, 1989Date of Patent: April 3, 1990Assignee: Hoechst Celanese Corp.Inventors: Gunilla E. Gillberg-LaForce, Garo Khanarian
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Patent number: 4913846Abstract: An infrared absorbing composition is disclosed, which contains at least one compound selected from compounds represented by formula (I) ##STR1## Compounds represented by formula (II) ##STR2## and compounds represented by formula (III) ##STR3## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.10, R.sup.11, R.sup.12, R.sup.13, R.sup.14, R.sup.17, R.sup.18, R.sup.19, R.sup.20 and R.sup.21, which may be the same or different, each represents a halogen atom, a hydrogen atom, or a substituted or unsubstituted alkyl, aryl, cycloalkyl or heterocyclic group which is bonded to the carbon atom of the benzene ring either directly or via a divalent linking group, or any pair of R.sup.1 to R.sup.5, R.sup.10 to R.sup.14, R.sup.17 to R.sup.21 having adjacent positions on the same ring combine to form a substituted or unsubstituted ring; R.sup.6 and R.sup.7, which may be the same or different, each represents an alkyl group or a substituted or unsubstituted aryl group; and R.sup.8, R.sup.9, R.sup.15, R.sup.16, R.Type: GrantFiled: August 5, 1987Date of Patent: April 3, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshiaki Suzuki, Gouichi Hayashi
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Patent number: 4884855Abstract: A narrow-band filter for absorbing radiation at a wavelength in the range of 9.2 to 10.8 microns and for transmitting radiation in a surrounding 8 to 12 micron band having a high transmission ratio. The filter is comprised of a pure or mixed alkali-halide crystal having optical incidence and transmission surfaces and thiocyanate or borofluoride as an impurity.Type: GrantFiled: July 12, 1983Date of Patent: December 5, 1989Assignee: Barnes Engineering CompanyInventors: James E. Moore, B. Michael Kale, George Csanak, Fritz Luty
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Patent number: 4791023Abstract: An infrared absorbent comprising .alpha.-diimine metal complex is disclosed. With the use of the infrared absorbent, there is provided an infrared absorbing material capable of absorbing a near-infrared light having a wavelength of 700-1500 nm and a far-infrared light. The infrared absorbent has a good fastness to heat and light. The infrared absorbing material is suitable for an optical filter and optical information recording medium.Type: GrantFiled: July 3, 1985Date of Patent: December 13, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshiaki Suzuki, Gouichi Hayashi, Masayoshi Tsuboi
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Patent number: 4783393Abstract: A dye mixture comprising at least two different unsymmetrical bis[1,2-diphenyl-1,2-ethanedithiolato(2.sup.-)-S,S'] -platinum compounds is disclosed. The mixture is useful in optical recording layers.Type: GrantFiled: October 27, 1986Date of Patent: November 8, 1988Assignee: Eastman Kodak CompanyInventors: John C. Brazas, Jr., Harold T. Thomas, Neil F. Haley, Michael W. Fichtner
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Patent number: 4767571Abstract: The present invention relates to an infrared absorbent comprising a metal complex. With the use of the infrared absorbent, there is provided an infrared absorbing material capable of absorbing near infrared light having a wavelength of 700-1500 nm or far infrared light with a high transmittance of visible light and a good fastness to heat and light. The infrared absorbent is suitable for various applications such as a safelight filter for infrared sensitive materials, control of growth of plants, cut-off of heat radiation, infrared cut filter harmful to tissues of human eyes, infrared cut filter for semiconductor light receiving elements or color solid image pick-up elements, and infrared cut filter for an optoelectronic integrated circuit wherein electrical and optical elements are incorporated in the same substrate.Type: GrantFiled: June 21, 1985Date of Patent: August 30, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshiaki Suzuki, Gouichi Hayashi
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Patent number: 4765931Abstract: An optically transmittant body comprising a solid solution of a ternary sulfide and a selected binary sulfide such as a solid solution of calcium lanthanum sulfide and phase lanthanum sulfide is provided by precipitating out of a nitrate solution of calcium and lanthanum, a starting powder of calcium carbonate and lanthanum carbonate. The molar ratio of lanthanum to calcium is greater than 2.0 moles lanthanum to 1.0 moles of calcium nitrate. The starting powder is reacted with a sulfurizing agent such as hydrogen sulfide to convert such starting powder into a powder of the solid solution of calcium lanthanum sulfide and phase lanthanum sulfide. The precipitate ion reaction forms a homogenous fine particle size starting powder of calcium carbonate and lanthanum carbonate which is substantially and uniformly converted into the solid solution powder. The phase lanthanum sulfide has a similar crystallographic structure as the calcium lanthanum sulfide.Type: GrantFiled: July 11, 1986Date of Patent: August 23, 1988Assignee: Raytheon CompanyInventors: Kenneth J. Saunders, Richard L. Gentilman
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Patent number: 4763966Abstract: An infrared absorbent comprising a metal complex compound prepared by coordinating two thiorato bidentate ligands to a center metal and neutralizing a complex ion with a cation. With use of the infrared absorbent, there is provided an infrared absorbing material capable of absorbing a far-infrared or near-infrared light having a wavelength of 700-1500 nm which has a high transmittance of a visible light and a good fastness to heat and light. The infrared absorbing material can be used for an infrared absorbing material such as an optical filter or other various objects.Type: GrantFiled: July 15, 1985Date of Patent: August 16, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshiaki Suzuki, Gouichi Hayashi
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Patent number: 4730896Abstract: A member capable of transmitting infrared rays of 2 .mu.m or longer in wavelength, particularly of 10.6 .mu.m in wavelength, with a slight loss is provided. The member comprises a Ge-Se-Te ternary chalcogenide glass having a composition which, in a compositional diagram of the ternary chalcogenide glass falls within the region bounded by the respective straight lines connecting points A, B, C, D, and E and A in this order, which points A, B, C, D, and E indicate Ge:Se:Te molar proportions of 32:25:43, 20:6:74, 15:5:80, 15:10:75, and 22:31:47, respectively.Type: GrantFiled: November 20, 1985Date of Patent: March 15, 1988Assignees: Hitachi, Ltd., Hitachi Cable Ltd.Inventors: Toshio Katsuyama, Hiroyoshi Matsumura
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Patent number: 4730902Abstract: An infrared absorbent comprising a metal complex compound prepared by coordinating a thiorato bidentate ligand and a nitrogen-containing bindentate ligand to a center metal. With use of the infrared absorbent, there is provided an infrared absorbing material capable of absorbing a far-infrared or near-infrared light having a wavelength of 700 nm or more, which has a high transmittance of a visible light and a good fastness to heat and light. The infrared absorbing material can be used for an infrared absorbing material such as an optical filter or other various objects.Type: GrantFiled: August 13, 1986Date of Patent: March 15, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshiaki Suzuki, Gouichi Hayashi
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Patent number: 4728682Abstract: Metal ternary sulfides of the general formula MM'.sub.2 S.sub.4 are synthesized by introducing stoichiometric amounts of nitrate precursors in concentrated nitric acid and heating to approximate dryness to yield a homogeneous powder mixture. The mixture is then exposed to a gaseous H.sub.2 S atmosphere under controlled conditions to produce the desired sulfide.Type: GrantFiled: September 30, 1985Date of Patent: March 1, 1988Assignee: The United States of America as represented by the Secretary of the NavyInventors: Josephine Covino, Marian E. Hills
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Patent number: 4728677Abstract: The invention relates to a vinyl halide polymer composition suitable for outdoor use in the sunlight. The change in color as measured by .DELTA.E in articles made from the polymeric composition is found to be substantially lower than other compositions. The lower .DELTA.E provides a measurement for improved weatherability of the compositions in such applications as housing siding, window profiles, shutters and roof vents.Type: GrantFiled: May 30, 1986Date of Patent: March 1, 1988Assignee: The B. F. Goodrich CompanyInventors: Emilia E. Lacatus, Elvira B. Rabinovitch, James W. Summers
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Patent number: 4675357Abstract: Disclosed is a near infrared absorbing polymerizate prepared from bis(allyl carbonate) monomer containing the reaction product of tungsten hexachloride and phenolic compounds.Type: GrantFiled: May 29, 1984Date of Patent: June 23, 1987Assignee: PPG Industries, Inc.Inventor: Cletus N. Welch
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Patent number: 4481314Abstract: Disclosed are novel anthraquinone compounds containing tetra-p-phenylenediamine substituents, particularly useful in molding type polyester compositions and possessing strong infrared absorptivity. This property renders these compounds attractive as additives for increasing the infrared energy absorptivity of polyesters either from high intensity quartz lamps or from certain laser systems. These compounds are particularly useful in bottle polyester material for increasing the blow-mold parison reheat rate, and in the printing of plastic articles with lasers.Type: GrantFiled: June 29, 1983Date of Patent: November 6, 1984Assignee: Eastman Kodak CompanyInventor: Mark Rule
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Patent number: H894Abstract: An IR detector structure is made from a CdTe substrate by polishing the C subtrate, and transferring the cleaned substrate to a chamber for successive epitaxial growth of HgCdTe and CdTe layers insitu without removal reducing contamination at the interfaces due to exposure to the atmosphere.Type: GrantFiled: July 13, 1989Date of Patent: March 5, 1991Assignee: The United States of America as represented by the Secretary of the ArmyInventor: James Halvis