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31. 发明专利

JPH05113587A NONLINEAR OPTICAL MATERIAL, ITS PRODUCTION AND OPTICAL WAVELENGTH CONVERTER 失效
公开(公告)号：JPH05113587A
公开(公告)日：1993-05-07
申请号：JP2364592
申请日：1992-02-10
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： OZAKI YUSUKE , MINEMOTO TAKASHI , SONODA NOBUO , KAWAKAMI TETSUJI , KAWAMURA TATSURO , WAKITA KATSUYA
IPC分类号： G02F1/35 , G02F1/355 , G02F1/361 , G02F1/37
摘要： PURPOSE:To easily obtain a large-size crystal by easy crystal growth and to obtain a nonlinear optical material having large hardness of the crystal and excellent workability by producing the crystal from a salt of an org. compd. having substituents expressed by specified formula and org. acid having optical activity. CONSTITUTION:A salt of an org. compd. and an org. acid having optical activity is dissolved in a mixed solvent comprising water and org. solvent. This org. compd. has an aromatic ring to which electron donating group and electron accepting group are directly coupled, and at least one kind of substituent expressed by formulae I-III which do not directly couple with the aromatic ring. The obtd. soln. is used to precipitate the single crystal of this salt by solvent vaporizing method to obtain a nonlinear optical material. In this process, the org. compd. is preferably 1-(4-nitrophenyl)piperazine, and the org. acid is at least one of tartaric acid and phenyl succinic acid, and the org. solvent is tetrahydrofurane. Or, the org. acid is L-tartaric acid and the org. solvent is acetonitrile.

32. 发明专利

JPH04326337A NONLINEAR OPTICAL MATERIAL 失效
公开(公告)号：JPH04326337A
公开(公告)日：1992-11-16
申请号：JP9683291
申请日：1991-04-26
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SONODA NOBUO , KAWAKAMI TETSUJI , WAKITA KATSUYA , MINEMOTO TAKASHI , OZAKI YUSUKE , KAWAMURA TATSURO
IPC分类号： G02F1/35 , G02F1/355 , G02F1/361
摘要： PURPOSE:To offer a nonlinear optical material having large optical nonlinearity, short absorption edge wavelength and high crystallinity as a secondary org. nonlinear optical material for an optical modulator, light wavelength converter, etc., by using a metal complex of typical metal element containing pi electron conjugate compd. as a ligand. CONSTITUTION:A coarse crystal of dimethyl tin-(R)-N,N'-bis(5- nitrosalicylaldehyde)-1-phenyl-1,2-ethane di-iminate is recrystallized with using methanol, and further crystallized by solvent evaporation method to obtain a single crystal of several mm cube. In the UV-visible light absorption spectrum of this crystal, no peak is observed except for an absorption specific to the ligand, which indicates that the crystal is enough transparent for visible light. This crystal shows the second harmonic generation (SHG) performance about 2.1 time as high as that of urea and shows excellent crystallinity.

33. 发明专利

JPH04326335A PRODUCTION OF NONLINEAR OPTICAL ELEMENT 失效
公开(公告)号：JPH04326335A
公开(公告)日：1992-11-16
申请号：JP9683091
申请日：1991-04-26
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MINEMOTO TAKASHI , SONODA NOBUO , KAWAKAMI TETSUJI , KAWAMURA TATSURO , WAKITA KATSUYA , OZAKI YUSUKE
IPC分类号： G02F1/35 , G02F1/355 , G02F1/361
摘要： PURPOSE:To control the growing direction of a crystal to produce an element containing an org. nonlinear optical material in a capillary by growing the crystal of nonlinear optical material in a magnetic field and using the component having large nonlinear optical constant. CONSTITUTION:A growing ampule 13 is charged with a glass capillary 12 and MNA source material 11 as one example of an org. nonlinear optical material to grow the crystal. Temp. T1 in a high temp. area is kept at 130-140 deg.C, while temp. T2 in a low temp. area is kept at 70-100 deg.C. When MNA 11 is heated over the melting point, MNA is sucked to the glass capillary 12 due to capillary action. Then the growing ampule 13 is raised at 5-20mm/hr speed by a motor 16. By applying a magnetic filed in two directions, the P-axis can be oriented almost perpendicular to the longitudinal axis of the capillary. The magnetic field applied is, for example, preferably 1-1.5 tesla.

34. 发明专利

JPH04159631A REWRITABLE OPTICAL RECORDING MEDIUM AND ITS RECORDING METHOD 失效
公开(公告)号：JPH04159631A
公开(公告)日：1992-06-02
申请号：JP28563390
申请日：1990-10-22
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KAWAMURA TATSURO , SONODA NOBUO , MINEMOTO TAKASHI , WAKITA KATSUYA
IPC分类号： G11B7/24 , B41M5/26 , G11B7/00 , G11B7/004 , G11B7/244
摘要： PURPOSE:To facilitate high density recording by a short wavelength light, recording by a low power light, high repeatability characteristics, high transfer rate recording, multivalue recording, etc. by a method wherein recording is performed by the variation of the spatial distribution of particles dispersed in medium. CONSTITUTION:If a recording light is absorbed by particles 1, medium 2, disc substrate 3 and a protective layer 4 and a temperature is elevated, the medium 2 is melted. At that time, the particles 1 are pushed toward an outer circumference direction B by a centrifugal force created by the rotation of a disc. Therefore, if a trench-shaped track 6 is filled with the medium 2 in which the particles 1 are uniformly dispersed and the recording light is applied to a pit in the track 6 and then the recording light is taken off while the medium 2 is in the melted state, the recording is completed. At the time of reproduce, a reproducing light whose power is not so strong as to melt the medium 2 is applied and a transmitted light or a reflected light is detected to reproduce the record. With this constitution, an optical recording medium which facilitates high density recording by a short wavelength light, recording by a low power recording light, high repeatability characteristics, high transfer rate recording, multivalue recording, etc. can be obtained.

35. 发明专利

JPH0345589A GROWTH OF GARNET CRYSTAL 失效
公开(公告)号：JPH0345589A
公开(公告)日：1991-02-27
申请号：JP18057389
申请日：1989-07-14
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MINEMOTO TAKASHI , MATSUDA KAORU , KAMATA OSAMU , ISHIZUKA SATOSHI
IPC分类号： G02F1/09 , C30B19/06 , C30B29/28
摘要： PURPOSE:To inexpensively reduce a light absorption loss of optical element, etc., by allowing a garnet crystal to grow in a liquid phase epitaxial device in which a crucible and a substrate holder both formed of platinum (material) containing a prescribed amount of ZrO2 dispersed therein are disposed. CONSTITUTION:A crucible 4 and a substrate holder 6 comprising a substrate- holder head portion 61 and leg portions 62 detachably attached thereto are made of platinum (material) containing 0.1-2wt.% of ZrO2 dispersed therein. A PbO-B2O3-Bi2O3 system melt 5 is placed in the crucible 4, and a holder 6 holding a Ca-Mg-Zr substitution type GGG(gadolinium-gallium-garnet) substrate (lattice constant: approximately 12.497Angstrom , thickness: approximately 1mm) is immersed in the melt 5 with a lifting mechanism 3 and heated with an electric heater 2 to generate a liquid epitaxial crystallization. A garnet crystal such as (BiYbGd)3Fe5O12 is thereby allowed to grow on the substrate 7 in a thickness of approximately 300mum.

36. 发明专利

JPH01197397A GARNET SUBSTRATE AND ITS PRODUCTION 失效
公开(公告)号：JPH01197397A
公开(公告)日：1989-08-09
申请号：JP2308188
申请日：1988-02-02
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MINEMOTO TAKASHI , MATSUDA KAORU , KAMATA OSAMU , ISHIZUKA SATOSHI
IPC分类号： C30B19/12 , C30B29/28 , H01F10/26
摘要： PURPOSE:To uniformly grow an epitaxial film on a garnet substrate in a short time by making a penetrating hole at the center of the substrate. CONSTITUTION:A penetrating hole is made at the center of the garnet substrate (preferably having

37. 发明专利

JPS6369800A MAGNETO-OPTICAL CRYSTAL 失效
公开(公告)号：JPS6369800A
公开(公告)日：1988-03-29
申请号：JP21093586
申请日：1986-09-08
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MINEMOTO TAKASHI , KAMATA OSAMU , ISHIZUKA SATOSHI
IPC分类号： C30B19/02 , C30B29/28 , G02F1/09
摘要： PURPOSE:To obtain the title crystal useful for optical communication and optical measurement and capable of eliminating the temp. dependency of the Faraday rotational angle, by epitaxially growing Bi-substituted rare-earth element garnet on a specified garnet crystal. CONSTITUTION:Bi-substituted rare-earth element garnet is epitaxially grown on the garnet crystal having the chemical composition shown by the formula (X, Y, and Z are respectively a positive number or 0 and 0

38. 发明专利

JPS6365420A MAGNETO-OPTICAL ELEMENT 失效
公开(公告)号：JPS6365420A
公开(公告)日：1988-03-24
申请号：JP21092786
申请日：1986-09-08
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KAMATA OSAMU , MINEMOTO TAKASHI , ISHIZUKA SATOSHI
IPC分类号： C01G49/00 , G02F1/09
摘要： PURPOSE:To obtain a magneto-optical element with which the change of the Faraday rotating angle with temp. is small by combining 1st and 2nd magneto- optical elements which are the oxides having the specific garnet type structure. CONSTITUTION:This optical element is formed of the 1st element 1 which is the oxide having the garnet type structure expressed by A3B5O12 and in which A is constituted of >=2 kinds rare earth metals or Bi metal and B is constituted of Fe or one or >=2 kinds among Al, Ga, Sc, In metals and the 2nd element 2 in which A is a Tb metal and B is constituted of an Fe metal. The change of the Faraday rotating angle of the magneto-optical element used for an optical isolator with temp. is thereby decreased and the deterioration in an isolation ratio with the change of ambient temp. is decreased. The optical isolator which can stably prevent reflected light is thus obtd.

39. 发明专利

JP2000111585A OPTICAL FIBER SENSOR 失效
公开(公告)号：JP2000111585A
公开(公告)日：2000-04-21
申请号：JP28177198
申请日：1998-10-02
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MINEMOTO TAKASHI , ITO NOBUKI , ISHIKAWA ONORI , ISHIZUKA SATOSHI
IPC分类号： G01R33/032 , G01R15/24
摘要： PROBLEM TO BE SOLVED: To easily manufacture a highly sensitive and inexpensive optical fiber by providing a set of soft-magnetic-body cores on the propagation axis of light in a magneto-optical element while the cores are placed between both sides, and by accommodating one part of the member of a sensor into a recessed part being formed on the end face. SOLUTION: Light from a light source is guided to a photo magnetic field sensor bead by an optical fiber 11 and is changed into a parallel beam or a convergence beam by a lens 12, and linear polarization is taken out by a polarizer 14. The linear polarization is transmitted through a magneto-optical element 15, and a polarization surface is rotated by Faraday effect. Also, the size of a magnetic field for operating on the magneto-optical element 15 depends on gap distance 20 of a set of soft-magnetic- body cores 19. In the soft-magnetic-body core 19, a recessed part 191 is formed, the polarizer 14 is accommodated in the recessed part, and the gap distance 20 is reduced. Light being subjected to the rotation of the polarization surface is converted to light intensity by an analyzer 16, furthermore, is transmitted through a mirror 17, the lens 12, and the optical fiber 11, and is introduced into a light reception circuit and a signal-processing circuit, thus calculating magnetic field strength (or a current value).

40. 发明专利

JPH09230013A PHOTOELECTRIC-MAGNETIC FIELD SENSOR PROBE AND MAGNETO-OPTICAL ELEMENT 失效
公开(公告)号：JPH09230013A
公开(公告)日：1997-09-05
申请号：JP3323396
申请日：1996-02-21
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： ITOU NOBUKI , YOSHIKAWA YUKIKO , ISHIZUKA SATOSHI , MINEMOTO TAKASHI , ISHIKAWA ONORI
IPC分类号： C01G29/00 , C30B29/28 , G01R33/032 , G02B6/24 , G02B6/26 , G02B6/32 , G02F1/09
摘要： PROBLEM TO BE SOLVED: To provide a photoelectro-magnetic field sensor probe of very small size and having high measuring accuracy. SOLUTION: In a photoelectro-magnetic field sensor probe in which along the advancing direction of a light, an input optical fiber 6a, a first lens 5a, a polarizer 2, a magneto-optical element 1, an analyzer 3 of different polarized light transmitting direction from the polarizer 2, a second lens 5b, and an output optical fiber 6b are arranged, a magnetic field to be measured is detected as output light strength, the first and second lenses 5a, 5b are drum lenses, and a drum lend holder housing them is provided so as to constitute a confocal optical system. The material of magneto-optical element 1 is expressed by a chemical formulare (Bix Gdy Rz Y3-x-y-z ) (Fe5-w Gaw )O12 ), and in the composition range, 0.84

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