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71. 发明专利

JPH03168601A REFRACTIVE INDEX-DISTRIBUTED LENS ARRAY 失效
公开(公告)号：JPH03168601A
公开(公告)日：1991-07-22
申请号：JP30763889
申请日：1989-11-29
申请人： MITSUBISHI RAYON CO
发明人： ODA MASAAKI , MISHINA YOSHIHIKO , MURATA RYUJI , UOZU YOSHIHIRO , TOYODA NOBUHIKO
IPC分类号： G02B3/00
摘要： PURPOSE:To finish adhering stage in a short time and to attain the mass- production of the arrays by arranging many lens elements close to one another and adhering the elements with a reaction-type hot-melt adhesive. CONSTITUTION:A hot-melt adhesive, especially a reaction-type hot-melt adhesive, is used as the adhesive. Consequently, the deposition of the adhesive on the undesired part is prevented, and the amt. of adhesive is fixed. Actually, refractive index-distributed lens elements are arranged in one or several rows close to one another, and the adhesive is applied on the assembly, heated to 80 deg.C by a plate heater 12 of the adhering device and press-adhered at 5kg/cm for 3min. Consequently, the adhering time is remarkably shortened as compared with the conventional process where a thermosetting adhesive is used and the adhesion requires several to several ten hours at 80-150 deg.C.

72. 发明专利

JPH0381704A PRODUCTION OF PLASTIC OPTICAL TRANSMISSION BODY 失效
公开(公告)号：JPH0381704A
公开(公告)日：1991-04-08
申请号：JP21724189
申请日：1989-08-25
申请人： MITSUBISHI RAYON CO
发明人： MISHINA YOSHIHIKO , MURATA RYUJI , UOZU YOSHIHIRO , ODA MASAAKI
IPC分类号： G02B6/00 , G02B3/00 , G02B6/028
摘要： PURPOSE:To obtain a continuous refractive index distribution by molding a mixture composed of a monomer A and a polymer B to a fiber shape, then diffusing a monomer C which forms a polymer of low refractive index into the fiber from the outer peripheral part thereof after the polymerization of a part of the monomer A. CONSTITUTION:The mixture 1 composed of the monomer A and the polymer B is inserted into a cylinder 3 and is extruded from a nozzle 4 by a piston 2 and is thereby molded to a fiber shape; thereafter, the monomer A is partly polymerized in a part 5 for irradiation with active rays. The monomer C which has the refractive index lower than the refractive index of the polymer of the monomer A after polymn. is diffused into the fiber from the outer peripheral part thereof in a diffusing chamber 6 to form the concn. distribution of the monomers A and C from the center toward the outer periphery. The monomers are then polymerized in a part 7 for irradiation with active rays to obtain the optical transmission body 9. The optical transmission body having the continuous refractive index distribution is obtd. in this way.

73. 发明专利

JPH0378706A PRODUCTION OF PLASTIC OPTICAL TRANSMISSION BODY 失效
公开(公告)号：JPH0378706A
公开(公告)日：1991-04-03
申请号：JP21528989
申请日：1989-08-22
申请人： MITSUBISHI RAYON CO
发明人： TOYODA NOBUHIKO , MISHINA YOSHIHIKO , MURATA RYUJI , UOZU YOSHIHIRO , ODA MASAAKI
IPC分类号： G02B6/13 , G02B3/00 , G02B6/00 , G02B6/028 , G02B6/12
摘要： PURPOSE:To easily obtain a desired refractive index distribution by forming a preliminary refractive index distribution by the volatilization of the monomer from a yarn-like body and then diffusing another monomer into the inside. CONSTITUTION:A mixture composed of a transparent polymer A having the refractive index NA and the monomer B which yields the polymer having a refractive index NB (where NA > NB) is molded to a fiber shape to form the fibrous material preliminarily formed with the refractive index distribution by volatizing the monomer B. This material is immersed into a soln. of the monomer C which yields the polymer having the high compatibility with the polymer A and having a refractive index NC (NC

74. 发明专利

JPH0233104A MANUFACTURE OF PLASTIC OPTICAL TRANSMISSION BODY 失效
公开(公告)号：JPH0233104A
公开(公告)日：1990-02-02
申请号：JP18281188
申请日：1988-07-23
申请人： MITSUBISHI RAYON CO
发明人： MISHINA YOSHIHIKO , MURATA RYUJI , UOZU YOSHIHIRO , ODA MASAAKI
IPC分类号： G02B6/00
摘要： PURPOSE:To attain continuous production by forming fibrously a monomer for dissolving a kind of polymer, inserting a monomer whose refractive index is different from that of the polymer of the monomer into its center part, and diffusing this monomer to the outside peripheral part from the center part of the fiber. CONSTITUTION:A polymer A and a monomer B are charged into a cylinder 1, extruded quantitatively by a piston 4, while heating them by a heater 3, mixed homogeneously by a kneading part 2, and thereafter, a strand fiber 6 is obtained from a nozzle 5. In such a case, a monomer C is inserted in advance in the center part of the fiber 6, diffused to the outside peripheral part from the center part of the fiber 6 under a prescribed condition by a heat insulating column 7, and subsequently, led to an active light beam radiating part 8, the monomer B and the monomer C are polymerized and solidified, wound to a winding drum 11 through a nip roller 10, and an object optical transmission body 12 is obtained continuously. In such a case, in order to facilitate the temperature control of the heat insulating column 7 and the polymerization by an active light beam, gas such as air, nitrogen, argon gas, etc. is led in from a gas leading-in hole 9. At the time of quickening the diffusion of the monomer C, an unhardened fibrous object is heated.

75. 发明专利

JPH01289810A TRANSPARENT MIXED RESIN COMPOSITION 失效
公开(公告)号：JPH01289810A
公开(公告)日：1989-11-21
申请号：JP11813388
申请日：1988-05-17
申请人： MITSUBISHI RAYON CO
发明人： UOZU YOSHIHIRO , MISHINA YOSHIHIKO
IPC分类号： C08L33/04 , C08F2/44 , C08F2/48 , C08F14/22 , C08F20/10 , C08F20/12 , C08F20/22 , C08F214/22 , C08F220/22 , C08L27/14 , C08L27/16 , G02B6/02 , G02B6/10
摘要： PURPOSE:To mix polymers having different refractive index from each other with good compatibility and to provide a transparent compsn. having an arbitrary refractive index by polymerizing an acrylic monomer having a high refractive index in the presence of a mixture of specified fluororesin polymers having low refractive indexes. CONSTITUTION:This transparent mixed resin compsn. is prepd. by adding a monomer having a high refractive index and a polymn. initiator, pref. a photo- polymn. initiator to a mixture of a fluorinated methacrylate polymer (A) wherein 2,2,3,3-tetra-fluoropropyl methacrylate is a main component and a vinylidene fluoride polymer (B) wherein vinylidene fluoride is a main component (a copolymer of 95-35mol% vinylidene fluoride with tetrafluoroethylene is pref.) and polymerizing the mixture. As the monomer having a high refractive index, at least one of methyl, ethyl, i-propyl, n-propyl, tert.-butyl and phenyl (meth) acrylates are used.

76. 发明专利

JPH01189603A PLASTIC LIGHT TRANSMISSION BODY AND ITS PRODUCTION 失效
公开(公告)号：JPH01189603A
公开(公告)日：1989-07-28
申请号：JP1417788
申请日：1988-01-25
申请人： MITSUBISHI RAYON CO
发明人： MISHINA YOSHIHIKO , UOZU YOSHIHIRO , ODA MASAAKI
IPC分类号： G02B6/00 , B29D11/00 , B29K35/00 , C08L33/04 , C08L33/10 , G02B3/00 , G02B6/028
摘要： PURPOSE:To enable mass production of a light transmission body having an adequate refractive index distribution by evaporating a monomer C from a mixture composed of a specific polymer A and the monomer C and polymerizing the monomer C to the polymer B by photoirradiation, thereby obtaining the continuous change distribution of the polymers A and B. CONSTITUTION:A mixture consisting of the polymer A having 2-hydroxyethyl methacrylate unit and essentially consisting of 2,2,2-trifluoroethyl methacrylate and the monomer C essentially consisting of a methyl methacrylate monomer is extruded from a nozzle 15 and the monomer C is evaporated from the surface to generate the continuous concn. distribution of the monomer C in the inside. This extrudate is then subjected to the photoirradiation to polymerize the monomer C to the polymer B essentially consisting of the methyl methacrylate so that the mixing ratio of the polymer A and the polymer B is continuously changed from the inside toward the surface. The mass production of the light transmission body adequately imparted with the refractive index distribution is thereby enabled.

77. 发明专利

JPH01108247A TRANSPARENT RESIN COMPOSITION 失效
公开(公告)号：JPH01108247A
公开(公告)日：1989-04-25
申请号：JP26272587
申请日：1987-10-20
申请人： MITSUBISHI RAYON CO
发明人： MISHINA YOSHIHIKO , UOZU YOSHIHIRO
IPC分类号： C08F2/44 , C08F2/48 , C08F220/12 , C08F265/00 , C08L33/04 , G02B6/00
摘要： PURPOSE:To provide a transparent optical resin composition whose refractive index can be freely controlled by varying the ratio of the polymer to the monomer, by irradiating a mixture comprising a low-refractive index polymer, a high-refractive index monomer and a photopolymerization initiator with ultraviolet rays. CONSTITUTION:A low-refractive index polymer is mixed with a high-refractive index monomer (e.g., methyl acrylate) and a photopolymerization initiator (e.g., benzoin). The obtained mixture is irradiated with ultraviolet rays to produce a transparent resin composition. As said low-refractive index polymer, a polymer comprising 60-80wt.% short-chain fluoroalkylmethacrylate (e.g., 2,2,2- trifluoroethyl methacrylate), 10-20wt.% 2-hydroxyethyl acrylate and 10-30wt.% other acrylate monomers is suitable. The obtained transparent resin composition whitens as the temperature increases, so that it can be used as an optical switch.

78. 发明专利

JPH01105205A CLAD MATERIAL FOR OPTICAL FIBER 失效
公开(公告)号：JPH01105205A
公开(公告)日：1989-04-21
申请号：JP18348088
申请日：1988-07-25
申请人： MITSUBISHI RAYON CO
发明人： MATSUMOTO SHIRUYOSHI , SHIMADA KATSUHIKO , UOZU YOSHIHIRO
IPC分类号： G02B6/00
摘要： PURPOSE:To improve heat resistance and bending property by using a fluorine- contained copolymer having a specific compsn. and

79. 发明专利

JPS6479704A POLYMER FOR OPTICAL FIBER SHEATH 失效
公开(公告)号：JPS6479704A
公开(公告)日：1989-03-24
申请号：JP23619087
申请日：1987-09-22
申请人： MITSUBISHI RAYON CO
发明人： MATSUMOTO SHIRUYOSHI , SHIMADA KATSUHIKO , UOZU YOSHIHIRO
IPC分类号： G02B6/00 , B29D11/00
摘要： PURPOSE:To maintain an optical characteristic of a low refractive index and to improve the radiation sensitiveness and hygroscopicity based on solubility by using a prescribed ratio of alkyl methacrylate fluoride, a prescribed ratio of the monomer expressed by the prescribed general formula and a prescribed ratio of a vinyl monomer which can be copolymerized therewith as the polymer compsn. of a polymer for an optical fiber sheath. CONSTITUTION:The polymer compsn. of the polymer for the optical fiber sheath is composed of 50-99.5wt.% alkyl methacrylate fluoride, 0.5-50wt.% monomer expressed by the general formula and 0-49.5% vinyl monomer which can be copolymerized therewith. In the formula, X is a hydrogen atom. or fluorine atom. and Rf is a fluoroalkyl group. The flexibility of the polymer is improved and the refractiveness of the optical fiber is satisfactorily maintained, by which the radiation sensitiveness and hygroscopicity based on the solubility are improved.

80. 发明专利

JPS63304204A PLASTIC LIGHT TRANSMISSION BODY AND ITS PRODUCTION 失效
公开(公告)号：JPS63304204A
公开(公告)日：1988-12-12
申请号：JP14052087
申请日：1987-06-04
申请人： MITSUBISHI RAYON CO
发明人： MISHINA YOSHIHIKO , UOZU YOSHIHIRO , ODA MASAAKI
IPC分类号： G02B6/00 , G02B6/028
摘要： PURPOSE:To improve productivity by mixing and dissolving a polymer contg. a photocrosslinkable functional group and a monomer having the refractive index different from the refractive index of the polymer, evaporating the monomer from the surface of a molding to impart a continuous concn. distribution of the monomer on the surface from the center and projecting light on the molding. CONSTITUTION:The polymer contg. the photocrosslinkable functional group and the monomer having the refractive index different from the refractive index of the polymer or >=2 kinds of the monomer mixtures contg. said monomer are charged into a cylinder 1, and after the polymer and monomers are uniformly mixed with each other under heating, a strand fiber 6 is formed from a nozzle 5. The monomer is evaporated from the surface of the strand by gas such as air or nitrogen to generate the concn. distribution of the monomer therein. A desired light transmission body 12 is continuously formed by changing and controlling the size, discharge rate, etc., of the strand fiber according to the purpose of use. The light transmission body having the refractive index distribution is thereby formed with good productivity.

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