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71. 发明专利

JPH01259574A NONLINEAR PHOTOELECTRIC CONVERSION DEVICE 失效
公开(公告)号：JPH01259574A
公开(公告)日：1989-10-17
申请号：JP8781488
申请日：1988-04-08
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： AMANO CHIKARA , YAMADA TAKESHI
IPC分类号： H01L27/14 , H01L31/10
摘要： PURPOSE:To make an incident light strength to output voltage characteristic to show a hysteresis by a method wherein the first electrode is attached to a semiconductor substrate, the second electrode is attached to a semiconductor layer for the second photoelectric element and the third electrode is attached to a semiconductor layer for the second negative temperature coefficient resistance element respectively, while the third electrode is connected to the semiconductor substrate or to the first electrode. CONSTITUTION:A laminar electrode 16 having transmittivity is ohmicly attached to a semiconductor layer 5a for a photoelectric conversion of a semiconductor layer 4 for a photoelectric conversion element of a laminate 2 for a photoelectric conversion element through a window 13; further, a laminar electrode 17 is ohmicly attached to a semiconductor 9 for a negative temperature coefficient resistance element of a laminate 7 for a negative resistance element through a window 14. In this case, the electrode 17 is extended to the main surface 19 of a semiconductor substrate 1 passing over an insulating layer 12 and its extension end is ohmicly connected to the semiconductor substrate 1. Thereby, an incident light strength to output voltage characteristic shows a hysteresis characteristic and is obtained in the wavelength range of the specially wide incident light 22.

72. 发明专利

JPH01239975A NONLINEAR OPTICAL ELEMENT AND ITS MANUFACTURE 失效
公开(公告)号：JPH01239975A
公开(公告)日：1989-09-25
申请号：JP6586988
申请日：1988-03-22
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： AMANO CHIKARA , YAMADA TAKESHI
IPC分类号： H01L31/04 , H01L31/0248 , H01L31/08 , H01L31/10
摘要： PURPOSE:To widen a wavelength range of incident light by a method wherein, after the whole of an nonlinear optical element has been laminated, a peak current value in a tunnel junction is made smaller than a maximum photoelectric current value in a photovoltaic element. CONSTITUTION:A negative resistance element by a tunnel junction part 20 constituted of an n -GaAs layer 21 and a p -GaAs layer 22 and a photovoltaic element 10 constituted of a p-GaAs layer 11, an n-GaAs layer 12 and an n- AlGaAs layer 13 are laminated on the top surface of an n-type GaAs substrate 3 in this layer order and in such a way that the operating direction of a p-n junction part of the junction part 20 is opposite to that of a p-n junction of the element 10. After the whole of the element has been laminated, a peak current value at the junction part 20 is set to be smaller than a maximum photoelectric current value in the element 10. Based on an operating principle which combines a photovoltaic effect in the element 10 with an electric switching effect due to a negative resistance of the junction part 20, a wave length range of input light can be widened and even white light can be used as the input light.

73. 发明专利

JPS639674B2 失效
公开(公告)号：JPS639674B2
公开(公告)日：1988-03-01
申请号：JP3337980
申请日：1980-03-18
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YAMADA TAKESHI , KITAYAMA TOYOKI
IPC分类号： H01L41/18 , H01L41/193

74. 发明专利

JPS6290519A INFRARED SENSOR 失效
公开(公告)号：JPS6290519A
公开(公告)日：1987-04-25
申请号：JP23003185
申请日：1985-10-17
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： FUJIWARA KOICHI , YAMADA TAKESHI , TSURUMI SHIGEYUKI
IPC分类号： G01J1/02 , G01J5/02 , G01J5/34
摘要： PURPOSE:To simultaneously measure the position and temp. of infrared rays with a small-sized apparatus, by providing a conductive film on one surface of a polarized pyroelectric film while providing a resistor layer guiding a pyroelectric current generated by incident infrared rays to the other surface thereof and further providing a plurality of electrodfes at the end parts of said resistor layer. CONSTITUTION:The charge generated on a pyroelectric film 11 by incident light converged to said pyroelectric film with respect to infrared rays from Ge is earthed through electrodes 13, 13' divided left and right on a resistor film 12 and a resistor R. Currents iA, iB flowing to the electrodes 13, 13' act as functions of the incident light position (x) on the pyroelectric film 11. When the total length of the pyroelectric film is set to 2L, (x) is calculated according to a formula x=(iA-iB)XL+L by a position judging operator 24 and the position of a light source is calculated from the constant of an optical system. Because a rise in temp. at this time is the function of a total pyroelectric current iA+iB, said rise in temp. is immediately calculated if calibration is preliminarily corrected. Therefore, the position and temp. of infrared rays from a near infrared region to a far infrared region can be simultaneously measured by a small-sized apparatus.

75. 发明专利

JPS61178428A PRODUCTION OF OPTICAL GLASS 失效
公开(公告)号：JPS61178428A
公开(公告)日：1986-08-11
申请号：JP1970185
申请日：1985-02-04
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： ONO MASAYOSHI , YAMADA TAKESHI , TAKATO NORIO
IPC分类号： G02B6/00 , C03B19/12 , C03B37/016
摘要： PURPOSE:To suppress the diffusion of dopant and obtain formed glass article, by increasing the molecular weight of the dopant in producing optical glass having the distribution of the dopant by the sol-gel method. CONSTITUTION:Two kinds of solution consisting essentially of a metal alcoholate consisting essentially of a silicon alcoholate, water and an alcohol, and having different compositions of the metal alcoholate are prepared. The first solution is them cast into a mold, hydrolyzed and gelatinized to lose fluid ity. At this time, the second solution is brought into contact with the gelatinized material of the first solution, cast and gelatinized. The gelatinized material is then taken out of the above-mentioned mold, and the formed material of the gel is dried and heated to give the aimed optical glass product having the distribution of the dopant. The alcoholate of the material to be the dopant in the second solution is previously hydrolyzed and polycondensed to increase the molecular weight before contact with the gelatinized material of the first solution.

76. 发明专利

JPS61163126A PREPARATION OF OPTICAL GLASS 失效
公开(公告)号：JPS61163126A
公开(公告)日：1986-07-23
申请号：JP283785
申请日：1985-01-11
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： ONO MASAYOSHI , YAMADA TAKESHI , TAKATO NORIO
IPC分类号： C01B33/152 , C03B8/02 , C03B19/12
摘要： PURPOSE:To prepare optical glass having remarkably reduced degree of deformation, and percentage of generated breakage of gel, in the course of drying by performing the drying stage of the gel formed by the sol-gel method in the vapor of specified org. component. CONSTITUTION:In the sol-gel method for prepg. transparent glass by drying and sintering gel obtd. by hydrolyzing a soln. consisting primarily of silicon alcoholate, water, and an org. solvent, the drying of said gel is performed in the atmosphere of the vapor of an org. component constituting an essential content of the gel. Suitable silicon alcoholate is pref. tetramethoxy silane, tetraethoxy silane, etc. Suitable org. solvent is lower alcohol such as methanol, ethanol, etc. The vapor pressure of alcohol in the above-described alcohol atmosphere is pref. >=60% of its satd. vapor pressure.

77. 发明专利

JPS61156007A PRODUCTION OF OPTICAL WAVEGUIDE 失效
公开(公告)号：JPS61156007A
公开(公告)日：1986-07-15
申请号：JP27901584
申请日：1984-12-27
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YAMADA TAKESHI , ONO MASAYOSHI , TAKATO NORIO
IPC分类号： G02B6/13 , G02B6/134 , G02B6/12
摘要： PURPOSE:To make the easy diffusion of a dopant into a porous glass body without heating or impression of an electric field possible by using the porous glass body and dipping said glass body into a soln. (dopant soln.) or gas contg. the atoms which an increase the refractive index of glass. CONSTITUTION:A metallic alcoholate consisting essentially of metallic alcoholate, water and org. solvent is gelled to form the porous glass body 1. A mask 2 formed with a desired pattern is laminated on the glass 1 and the glass is dipped into the dopant soln. 3 to diffuse the atoms which increase the refractive index of the glass contained in the soln. 3 into the glass 1. The mask 2 is then removed and the glass body 1 is dipped into the soln. 4 contg. the atoms which can decrease the refractive index of the glass body to diffuse the above-mentioned atoms near the surface. The section of the refractive index distribution along the B line of the doped part is nearly circular. Such glass body is dried and the optical waveguide is produced.

78. 发明专利

JPS60232528A MANUFACTURE OF FARADAY ROTATION GLASS 失效
公开(公告)号：JPS60232528A
公开(公告)日：1985-11-19
申请号：JP8777384
申请日：1984-05-02
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YAMADA TAKESHI , KUROKAWA TAKASHI , OONO MASAYOSHI
IPC分类号： G02F1/09
摘要： PURPOSE:To easily manufacture the Faraday rotation glass by forming a gel of a solution obtained by dissolving a material containing one kind of material selected among the group IV, group V, and lanthanum sequence in a solution consisting principally of metallic alcoholate which can gel, an organic solvent and water. CONSTITUTION:The mixed solution 1 consisting principally of at least one kind of metallic alcoholate which can gel by hydrolysis, water and organic solvent is flowed into a container 2 (a), where it gels while a mold 3 with a desired shape is brought into contact (b). Then, the mold 3 is removed and a material which provides magneto-optic effect is added to the solution, and further a mixed solution containing metallic alcoholate of different kind from said metallic alcoholate as a principal component is flowed onto the gel 1 when necessary to attain gelling (c). Then, a drying treatment is performed slowly enough not to break the gel and sufficiently, and a heat treatment is carried out for vitrification (d). Then, excessive glass is removed to obtain an element having an optical waveguide 5 made of Faraday rotation glass.

79. 发明专利

JPS60232509A MANUFACTURE OF OPTICAL ELEMENT 失效
公开(公告)号：JPS60232509A
公开(公告)日：1985-11-19
申请号：JP8777484
申请日：1984-05-02
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YAMADA TAKESHI , KUROKAWA TAKASHI , OONO MASAYOSHI
IPC分类号： G02B6/13 , G02F1/01 , G02F1/065
摘要： PURPOSE:To obtain easily a homogeneous optical element at a low cost by mixing an org. solvent with water and alcoholates of the constituent elements of a substance producing an electrooptical or acoustooptical effect so as to provide a desired composition, pouring the resulting soln. on gel, converting it into gel, drying and heating the formed gel, and placing electrodes. CONSTITUTION:A mixed soln. 1 contg. silicone alkoxide, water and an org. solvent as principal components is poured in a vessel 2 (a), and while putting a forming die 3 of a desired shape on the soln. 1, the soln. 1 is converted into gel (b). The org. solvent is mixed with water and alcoholates of the constituent elements of the substance producing an electrooptical or acoustooptical effect so as to provide a desired composition, and after removing the die 3, the resulting soln. 4 is poured on the gel 1 and converted into gel (c). The formed gel is slowly dried so as to prevent breaking, and the well dried gel is heated and baked (d). An excess part is removed by polishing, etching or other means, and electrodes 5 are formed at prescribed positions by sputtering or other means to obtain a waveguide having a substance 4' producing an electrooptical or acoustooptical effect (e).

80. 发明专利

JPS60173501A PRODUCTION OF OPTICAL ELEMENT 失效
公开(公告)号：JPS60173501A
公开(公告)日：1985-09-06
申请号：JP2601884
申请日：1984-02-16
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： YAMADA TAKESHI , KUROKAWA TAKASHI , OONO MASAYOSHI , TATE AKIYUKI
IPC分类号： G02B6/122 , G02B6/132 , G02B6/12
摘要： PURPOSE:To obtain easily an optical element having high performance and wide applications by installing a matrix having ruggedness on a substrate, depositing an optical waveguide layer on the substrate and forming the transfer pattern of the matrix to the end of the optical waveguide layer on the substrate. CONSTITUTION:A matrix 1 having a pattern at the end is installed on a substrate 2. The pattern inscribed on the matrix 1 includes a diffraction grating, lens, parabolic face and the combination thereof. Not only a quartz plate, glass plate and silicon plate but also a substrate attached with electrodes, etc. thereon are usable for the substrate. An optical waveguide 3 is deposited on the substrate 2. An optical waveguide 3 having a pattern part 4 on the end face is obtd. by removing the matrix 1. There is a method in which the matrix 1 is not removed by using the matrix having high reflectivity in the pattern part or a method for attaching a mirror by vapor deposition, etc. to the pattern part on the end face after removal of the matrix 1 in the case in which the end face is required to play the role of a mirror.

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