专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

81. 发明专利

JPS63204235A NONLINEAR OPTICAL ELEMENT 失效
公开(公告)号：JPS63204235A
公开(公告)日：1988-08-23
申请号：JP3728887
申请日：1987-02-20
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SHUDO YOSHITO , AMANO MICHIYUKI , TAKEUCHI YOSHIAKI , YAMAMOTO FUMIO
IPC分类号： G02B6/00 , C09K19/38 , G02B6/032 , G02F1/35 , G02F1/355 , G02F1/361 , G02F1/37 , G02F1/383
摘要： PURPOSE:To obtain a nonlinear optical element having excellent long-term reliability and high second harmonic wave by using a specific side chain type liquid crystal high polymer for a core member or clad member of an optical fiber type waveguide. CONSTITUTION:The side chain type liquid crystal high polymer which exhibits large spontaneous polarization in a thermotropic mesomorphic state is used for the core (clad) member and the material having the refractive index lower (higher) than the refractive index of the core (clad) member is used for the clad (core) member to form the optical fiber type waveguide. The side chain type liquid crystal high polymer to be used has chiral carbon atoms and carbonyl group in the side chain of the high polymer and exhibits at least >=1X10 C/m spontaneous polarization in a chiral smectic mesomorphic phase C. The units having the chiral carbon of the side chains are arranged in the direction perpendicular to the fiber axis in a stage for spinning (forming fiber) such side chain type liquid crystal high polymer and the material having the refractive index lower (or higher) than the refractive index of the side chain type liquid crystal high polymer is disposed on the outer (or inner) circumference of the liquid crystal high polymer simultaneously or in a separate state. The element exhibiting the high second harmonic wave is thereby obtd.

82. 发明专利

JPS6317410A OPTICAL FIBER CORE COVERED WITH LIQUID CRYSTAL HIGH-POLYMER 失效
公开(公告)号：JPS6317410A
公开(公告)日：1988-01-25
申请号：JP15985786
申请日：1986-07-09
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TAKEUCHI YOSHIAKI , SHIYUDO YOSHITO , YAMAMOTO FUMIO
IPC分类号： C03C25/10 , C08G63/60 , G02B6/44
摘要： PURPOSE:To improve the side pressure resistance characteristic of an optical fiber core by using a liquid crystal high polymer material having a rigid component at the main chain or the main chain and side chains as a secondary covering layer. CONSTITUTION:The cases of the composite type liquid crystal high polymer and the main chain type liquid crystal high polymer having the rigid side chains are illustrated. The rectangular parts shown in the figures indicate the rigid component and the waveform parts indicate a resilient component. The improvement in the modulus of elasticity in the longitudinal direction and in the direction perpendicular thereto is thus attained by orienting the rigid component in the side chains in said directions. The materials expressed by, for example, the formula I-formula IV are used as the liquid crystal type side chain. The materials among the formula I-formula IV which do not contain -O-(CH2)n- component are used as the rigid side chain. The side pressure resistance characteristic of the optical fiber core is improved and the reduction in the core diameter is permitted by using the liquid crystal high polymer having the rigid component oriented not only in the longitudinal direction but also in the direction perpendicular thereto as the secondary covering layer of the optical fiber core in the above-mentioned manner.

83. 发明专利

JPS62162655A PRODUCTION OF CORE WIRE OF COATED OPTICAL FIBER HAVING LOW LINEAR EXPANSION COEFFICIENT 失效
公开(公告)号：JPS62162655A
公开(公告)日：1987-07-18
申请号：JP474486
申请日：1986-01-13
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SHIYUDO YOSHITO , TAKEUCHI YOSHIAKI , YAMAMOTO FUMIO
IPC分类号： C03C25/10 , C09K19/38 , G02B6/44
摘要： PURPOSE:To obtain the titled core wire having improved transmission loss and surface smoothness and high reliability, by applying a magnetic field to a thermoplastic resin in a secondary coating layer in a molten state on the outer periphery of an element wire consisting of an optical fiber and a primary coating layer in the fiber longitudinal direction. CONSTITUTION:A core wire of an optical fiber is produced by secondarily coating a thermoplastic resin capable of exhibiting melt liquid crystallinity on the outer periphery of an element wire of an optical fiber consisting of the optical fiber and a primary coating layer. In the process, a magnetic field is applied from the outside to the thermoplastic resin in the secondary coating layer in a molten state in the fiber longitudinal direction. Any thermoplastic resins capable of assuming each nematic, smectic or cholesteric liquid crystal state in a molten state to be used can be oriented inductively to the applied magnetic field. Among them, a nematic liquid crystal high polymer material having a high speed of response to the magnetic field is particularly preferred.

84. 发明专利

JPS62115406A OPTICAL FIBER CORE WIRE 失效
公开(公告)号：JPS62115406A
公开(公告)日：1987-05-27
申请号：JP25487185
申请日：1985-11-15
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SHIYUDO YOSHITO , TAKEUCHI YOSHIAKI , YAMAMOTO FUMIO
IPC分类号： C03C25/10 , G02B6/44
摘要： PURPOSE:To obtain the titled wire having a less tendency for increasing the transmission loss due to a change of an used temperature and having an excellent bendability by arranging a coating layer composed of two layers comprising a thermoplastic resin which has a liquid crystal property in a melt state and displays a high elastic modulus and a low coefficient of a linear expansion and a thermoplastic resin having great bendability on the outer side of the optical fiber element wire. CONSTITUTION:The titled wire comprises the 2nd. coating layer 5 of the optical fiber having a relatively large orientation degree and the 3rd. coating layer 6 which is disposed on surroundings of said layer 5 and is the thin film (50-100mum the thickness) and is composed of the thermoplastic resin having a low orientation degree, such as polyamide and polyethylene, etc. In the titled wire, the usual 2nd. coating layer is constituted of a double layers. The distribution of the orientation degree of the 2nd. and 3rd. coating layers is adjusted in such a way that the orientation degree of the outer surface layer (the 3rd. coating layer) makes to the min. value, when the max. elongation force or the max. compression force at the bending of the core wire is loaded. Thus, as the outer surface layer (the 3rd. coating layer) has the lower elastic modulus locally in comparison with that of the inner layer (the 2nd. coating layer), and is rich in the elastic modulus, the titled wire may stand against the large elongation and compression forces resulted in giving the core wire having the excellent bendability.

85. 发明专利

JPS6236047A PRODUCTION OF OPTICAL FIBER CORE 失效
公开(公告)号：JPS6236047A
公开(公告)日：1987-02-17
申请号：JP17248285
申请日：1985-08-07
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YAMAMOTO FUMIO , SHIYUDO YOSHITO , TAKEUCHI YOSHIAKI
IPC分类号： C03C25/10 , B29C47/02 , G02B6/44
摘要： PURPOSE:To obtain the titled optical fiber core consisting of a molten liq. crystalline high molecular substance exhibiting a stabilized characteristic by evacuating the space between an optical fiber strand and a molten thermoplastic resin and simultaneously compressing from the outer side of the thermoplastic resin. CONSTITUTION:In the production of an optical fiber core by forming the secondary coated layer 4 of a molten liq. crystalline high molecular substance (hereinafter referred to as LCP) on the outer periphery of an optical fiber strand 3, the space between the optical fiber strand 3 and the molten LCP is evacuated 5 and simultaneously the optical fiber strand 3 and the secondary coated layer 4 of LCP are firmly attached by compression 8 from the outside of LCP. By this method, since the attached point 9 between the optical fiber strand 3 and the secondary coated layer 4 of LCP is controlled by both evacuation and compression, the movement of the attached point 9 causing the variations of the diameter of the optical fiber core and the inclusion of air bubbles can be easily controlled and an optical fiber core exhibiting a stabilized characteristic can be obtained.

86. 发明专利

JPS60154220A COATED OPTICAL FIBER AND ITS PRODUCTION 失效
公开(公告)号：JPS60154220A
公开(公告)日：1985-08-13
申请号：JP1032384
申请日：1984-01-25
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： AZUMA MAKOTO , YAMAMOTO FUMIO , KIMURA TAKAO , SHIYUDOU YOSHITO , YAMAKAWA SHINZOU
IPC分类号： C03C25/10 , B29C47/00 , C03C25/18 , G02B6/44
摘要： PURPOSE:To enable high-speed coating and to reduce cost by forming the 1st layer consisting of an extrusion-coatable thermoplastic rubber compsn. having the Young's modulus of a specific value or below and the 2nd layer consisting of a thermoplastic resin having the Young's modulus of a specific value or above and the coefft. of linear expansion of a specific value or below by extrusion-coating on the outside circumference of an optical fiber. CONSTITUTION:A base material 1 for an optical fiber is spun by using a cross head which is of a straight pipe shape having coefft. of thermal expansion and >=1GPa Young's modulus for example, a copolymer of p-hyroxy benzoic acid and polyethylene terephthalate or the like is used for the 2nd layer of said coating. The high-speed extrusion coating is thus made possible and the production of an optical fiber cable, etc. having high reliability is made possible.

87. 发明专利

JPS6093406A OPTICAL FIBER CORE 失效
公开(公告)号：JPS6093406A
公开(公告)日：1985-05-25
申请号：JP20072083
申请日：1983-10-28
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SHIYUDOU YOSHITO , YAMAMOTO FUMIO , YAMAKAWA SHINZOU
IPC分类号： C08L67/00 , C03C25/10 , C03C25/24 , C09D167/00 , G02B6/44
摘要： PURPOSE:To obtain an optical fiber core having reduced transmission loss for a long length and having high strength and excellent bendability by blending thermoplastic polyester with arom. polyester respectively at specific contents and using the mixture composed thereof as a resin compsn. for coating. CONSTITUTION:A resin compsn. constituted of thermoplastic polyether ester and arom. polyester which can form a molten liquid crystal layer at about

88. 发明专利

JPS58166020A STRETCHING OF PLASTICS 失效
公开(公告)号：JPS58166020A
公开(公告)日：1983-10-01
申请号：JP4901282
申请日：1982-03-29
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YAMAMOTO FUMIO , NAKAGAWA KOUICHI , YAMAKAWA SHINZOU
IPC分类号： B29C55/00 , B29B9/00 , B29B13/00 , B29B13/08 , B29C49/00
摘要： PURPOSE:To prepare plastics with a low linear expansion coefficient and a high elastic modulus at a high speed and continuously by a method wherein plastics is heated once or several times by turns by one or plural lasers that are arranged successively in the stretching direction of the plastics to heat promptly and stretch a limited portion only. CONSTITUTION:An unstretched rod 2 is passed between a feed belt 3 and a take- up belt 14 and introduced into a constant temperature bath 4. Laser beams 9 irradiate from a laser generator to said unstretched rod 2, and at the same time the speed of the take-up belt 14 is accelerated gradually to elevate the stretch ratio. The laser output of the 2nd and following laser generators 6-8 is contrived to increase in that order and operated by turns to irradiate laser beams 10-12. A portion of the plastic rod 2 that is irradiated by laser beams is heated promptly and stretched. Thus, it is possible to obtain plastics of a low linear expansion coefficient and a high elastic modulus.

89. 发明专利

JPS585571B2 失效
公开(公告)号：JPS585571B2
公开(公告)日：1983-01-31
申请号：JP13904776
申请日：1976-11-20
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YAMAMOTO FUMIO , YAMAKAWA SHINZO , FUKUI ICHIRO , TSURU SHINJI , AZUMA MAKOTO
IPC分类号： H02G15/013 , H02G15/08 , H02G15/18

90. 发明专利

JPS5526416A MEASURING METHOD FOR CONTRACTION FORCE OF THERMAL CONTRACTION TUBE 失效
公开(公告)号：JPS5526416A
公开(公告)日：1980-02-25
申请号：JP9868178
申请日：1978-08-15
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HAMADA KATSUYOSHI , KAIZU RIYOUSUKE , YAMAMOTO FUMIO
IPC分类号： G01L5/00
摘要： PURPOSE:To improve precision and facilitate operations by enclosing gas inside a thermal contraction tube and balancing the gas pressure, which acts toward the outside, and the contraction force of the tube and measuring the contraction force as the gas pressure. CONSTITUTION:Round covers 9 are inserted to both ends of thermal contraction tube 1 so that they may be caused to adhere closely to them and are tightened by band 10 to prevent gas leakage, and the tube is fixed in constant temperature oven 2. The temperature of constant temperature oven 2 is raised gradually; and when the temperature of this oven reaches a prescribed temperature, inactive gas is enclosed into tube 1 from gas bombe 4 little by little to adjust to make tube 1 of a prescribed outside diameter. The contraction of tube 1 into the prescribed diameter at a prescribed temeprature indicates a state where the contraction force of tube 1 and the gas pressure are balanced, and the value of pressure gauge 8 at this time is read to obtain the contraction force per unit area in the radius direction of tube 1.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式