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1. 发明专利

JPS54127340A LIGHT ATTENUATOR 失效
公开(公告)号：JPS54127340A
公开(公告)日：1979-10-03
申请号：JP3413878
申请日：1978-03-27
申请人： NIPPON TELEGRAPH & TELEPHONE , NIPPON ELECTRIC CO , FUJITSU LTD
发明人： MINOWA JIYUNICHIROU , MIKI TETSUYA , NONAKA SHIYUNSUKE , KURITA SHIYOUICHI
IPC分类号： G02B5/22 , G02B6/00
摘要： PURPOSE:To make the light attenuator miniature, lightweight and robust by forming an attenuating film to an optical lens having a square refractive index distribution and incorporating the lens into the connector for optical fibers. CONSTITUTION:An optical fiber F1 and an attenuating element M are secured to a male type connector P and an optical fiber F2 is secured to a female type connector J. The connectors P, J are then fitted together. The attenuating element M is constituted by depositing a vapor deposition film 6 of Cr, Ni, Ge, Si, etc. on the incident or exit face of light radiation or intermediate face of the square refractive index distribution lens L in which the length of the light propagation direction is 1/2 or integer times of 1/2 of one period length of rays. Here, the luminous flux from the optical fiber F1 is magnified and converged within the attenuator M and is coupled to the optical fiber F2 in the converged position. The specified attenuation is obtained with the film 6 and the luminous flux is led to the optical fiber F2 by passing through the attenuator M.

2. 发明专利

JPS5616104A DIFFRACTION GRATING TYPE OPTICAL BRANCHING FILTER 失效
公开(公告)号：JPS5616104A
公开(公告)日：1981-02-16
申请号：JP9238079
申请日：1979-09-19
申请人： NIPPON ELECTRIC CO , NIPPON TELEGRAPH & TELEPHONE
发明人： ISHIKAWA SHIGETA , DOI KIKUO , MINOWA JIYUNICHIROU , FUJII YOUJI
IPC分类号： G02B6/293 , G02B6/34 , G02B6/38
摘要： PURPOSE:To match the center wave length of a branching filter to the wave length of a light source with a high precision, by converging again beams which are obtained by diffracting outputs of plural optical fibers, which are arranged in parallel through the V groove plate formed by etching of silicon single crystal, by a diffraction grating to parallel fibers through a lens. CONSTITUTION:V groove plate 14 is produced by chemical etching of a silicon plate, and arrangement part 15 of plural optical fibers is formed, and optical fiber cords 16-20, connector 21, holder 22, and box body 23 are provided. End faces of optical fiber strands 16-1-20-1 are placed at the focus of lens 2, and the light emitted from end faces becomes parallel beams 6-8 by lens 2 and is diffracted by diffraction grating 1. The diffracted light is converged to end faces of optical fiber strands 16-1-20-1 again by lens 2. By setting the interval of V grooves properly, the center wave length of the branching filter can be matched to the wave length of the light source with a high precision.

3. 发明专利

JPS5670504A PHOTOSWITCH 失效
公开(公告)号：JPS5670504A
公开(公告)日：1981-06-12
申请号：JP14742579
申请日：1979-11-14
申请人： NIPPON ELECTRIC CO , NIPPON TELEGRAPH & TELEPHONE
发明人： AOYAMA TSUTOMU , FUJII YOUJI , MINOWA JIYUNICHIROU
IPC分类号： G02B26/08 , G02B7/182
摘要： PURPOSE:To attain a low loss and high reproducibility by using a reflector free of a change in optical path for optical path switching. CONSTITUTION:Reflector 40 having plane mirror 17, cutting off incident side optical path 11, and plane mirror 16, cutting off output side optical path 12, arranged at acute angle (theta) is interposed in or taken out of optical paths 11 and 12 to change over the optical paths of parallel light. Reflector 40, fixed inside of the holder having the incorporated permanent magnet, is driven by changing the polarities of the electromagnet.

4. 发明专利

JPS55116227A LIGHT CHOPPER 失效
公开(公告)号：JPS55116227A
公开(公告)日：1980-09-06
申请号：JP2477879
申请日：1979-03-02
申请人： NIPPON ELECTRIC CO , NIPPON TELEGRAPH & TELEPHONE
发明人： AOYAMA TSUTOMU , KOBAYASHI IKUTAROU , MINOWA JIYUNICHIROU
IPC分类号： G01J1/04 , G01J1/02 , G01J1/36 , G01J3/08
摘要： PURPOSE:To obtain a light chopper useful in characteristic measurement for optical communication system, photo-devices and others by an arrangement wherein the lens is disposed in such a way that incident light is focused on the light chopping means arranged between two lenses. CONSTITUTION:Light introduced from a connector 15 connecting with optical fibers is image-transformed by a lens 11 so as to be focused on a shutter 14 opened or closed at the natural frequency of a tuning fork vibrator 13. The interrupted light enters into a lens 16 and then focuses so as to enter into optical fibers connecting with a connector 16. In this arrangement, when resonant frequency of the tuning fork vibrator is set at 280Hz, vibration of 400mum is produced with the application of 20Vpp, and the rod lenses are disposed to make the image transformation of 1:1 therebetween, the diameter of the focused light becomes 60mum upon connecting to optical fibers with the core diameter of 60mum. Rising and falling times of thus arranged light chopper become about 50mus and thus light pulse very near to a square wave is obtained. By so doing, it becomes possible to provide the light chopper useful in characteristic measurement for optical communication system, photo- device and others.

5. 发明专利

JPS55105210A PHOTO SWITCH ELEMENT 失效
公开(公告)号：JPS55105210A
公开(公告)日：1980-08-12
申请号：JP1356979
申请日：1979-02-08
申请人： NIPPON ELECTRIC CO , NIPPON TELEGRAPH & TELEPHONE
发明人： AOYAMA TSUTOMU , DOI KIKUO , MINOWA JIYUNICHIROU , FUJII YOUJI
IPC分类号： G02B26/08 , G02B6/35
摘要： PURPOSE:To obtain the photo switching element of a small size, less insertion losses and high reliability by providing lens systems in the luminous flux of optical fibers and switching the optical paths of parallel light by the lenses through the use of a transparent dielectric. CONSTITUTION:A lens 26 changes the light of optical fibers 21, 22 to parallel light and a lens 27 focuses this parallel light and enters the same into optical fibers 23, 24. A transparent dielectric 25 having a rhombic bottom surface and a moving device 28 are disposed between the lenses 26, 27. Diagonal lines 29 are moved across the optical paths by the moving device 28 to perform switching of the optical paths. For example, when the dielectric 25, i.e., diagonal lines 29 are in the optical paths, the fibers 21, 24 are connected and when the dielectric 25 is moved to outside the optical path, the light advances rectilinearly and the fibers 21, 23 are connected. Thereby, the photo switching element of a small size, low losses and high reliability may be obtained.

6. 发明专利

JPS5566723A FORKKTYPE OPTICAL CHOPPER 失效
公开(公告)号：JPS5566723A
公开(公告)日：1980-05-20
申请号：JP14033778
申请日：1978-11-14
申请人： NIPPON ELECTRIC CO , NIPPON TELEGRAPH & TELEPHONE
发明人： SHIODA JIYUNICHI , KAWANA TAKAYUKI , AOYAMA TSUTOMU , KOBAYASHI IKUTAROU , MINOWA JIYUNICHIROU
IPC分类号： G01J1/04 , G01J1/36
摘要： PURPOSE:To obtain a fork-type optical chopper, whose excitation power and oscillation leakage and variation of oscillation frequency by aging are small, by attaching a shutter inside a beam section of a fork oscillator having 2 beam sections, so that incoming light can be screened. CONSTITUTION:Shutters are attached to inside of respective fork beam sections 22 in such a manner that when the beam sections 22 are not vibrating there is a gap allowing a beam-like light signal to pass through and that the beam sections are crossing each other without contacting each other in the condition that they are making maximum displacement inwardly. The light signal is concentrated by No.1 lens so that the focus comes to the center of the gap of the shutters, and then, it is converted into a horizontal light by No.2 lens. Since, in this mechanism, light is screened when the beam sections 22 are displaced inwardly by eual amount, each beam section is required to be displaced by only 1/2 of displacement required for intermitting the light signal, and therefore, it is possible to reduce exciting power, oscillation leakage and variation of oscillation frequency by aging.

7. 发明专利

JPS58140605A CONTROLLING METHOD OF THICKNESS OF OPTICAL THIN FILM 失效
公开(公告)号：JPS58140605A
公开(公告)日：1983-08-20
申请号：JP553282
申请日：1982-01-18
申请人： KOSHIN KOUGAKU KK , NIPPON TELEGRAPH & TELEPHONE
发明人： TAKAHASHI HARUO , MINOWA JIYUNICHIROU , MIYAMOTO NOBUHIDE
IPC分类号： G01B11/06
摘要： PURPOSE:To obtain prescribed film thickness with high accuracy in controlling of the optical film thickness of vapor deposited thin films by passing monochromatic light through the thin films during vapor deposition of the thin films and measuring the inverse proportional value of transmittance. CONSTITUTION:An evaporating source material 3 placed on the inner side of an opening/closing device 2 is heated in a vacuum vessel 1. Monochromatic light is projected from a light projector 6 to the substrate 5 to be deposited in a circular cover 4 and the light passed through the substrate 5 is fed to a measuring mechanism 7. The incident light in the mechanism 7 is passed through a photodetecting part 8 and is intensified with an amplifier 9. The ratio between the amplitude which is the inverse number of the transmittance of the monochromatic incident light and the constant amplitude determined by the refractive index of the evaporating source material is determined with constant power sources 10, 10' and calculators 11, 11', then the outputs which are equal to the square of the sine of optical phase angles and change periodically with an increase in optical film thickness are drawn by a recorder 12. The vapor deposition is suspended by the device 2 upon attaining of the required optical film thickness, whereby the thin films are formed to the prescribed film thickness with high accuracy.

8. 发明专利

JPS5660440A CONTACT EXPOSURE METHOD 失效
公开(公告)号：JPS5660440A
公开(公告)日：1981-05-25
申请号：JP13616679
申请日：1979-10-22
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TOBE SHIYUUJI , MINOWA JIYUNICHIROU , HABUKA RIYUUJI
IPC分类号： G03B27/02 , G03F7/20 , H01L21/027
摘要： PURPOSE:To prevent decrease of yield of contact exposure, by pressurizing a substrate and a photomask reaction arily and locally in order to reduce interference fringes caused by presence of gaps between the photoresist film and the photomask. CONSTITUTION:Substrate 2 is placed on holder 10, photomask 3 is received with receiving plate 11 connected with holder 10 from the side reverse to substrate 2, and substrate 2 is pressed with the tips of many screws from the side of holder 10. In this state, photomask 3 is illuminated, for example, with white light 6 in the arrow direction toward substrate 2, and a number of interference fringes are reduced by observing the interference fringes caused by presence of gaps between photoresist film 1 and photomask 3, pressing substrate 2 with necessary screws among many screw 12, and pressing substrate 2 and photomask 3 reactionarily and locally, thus permitting the gaps between photoresist film 1 and photomask 3 to be reduced and decrease of yield of contact exposure to be prevented.

9. 发明专利

JPS57207219A PRODUCTION OF POLARIZATION CANCELLATION CIRCUIT 失效
公开(公告)号：JPS57207219A
公开(公告)日：1982-12-18
申请号：JP9149781
申请日：1981-06-16
申请人： NIPPON TELEGRAPH & TELEPHONE , OUYOU KOUDEN KENKIYUUSHITSU KK
发明人： FUJII YOUJI , SARUWATARI MASATOSHI , MINOWA JIYUNICHIROU , ITOU TOMOYUKI , AOSHIMA KENJI
IPC分类号： G02B27/28
摘要： PURPOSE:To facilitate manufacture by constituting a polarization cancellation circuit by using two pieces of trapezoidal blocks which are constituted by adhering parallelogram prisms and rectangular prisms. CONSTITUTION:Parallelogram prisms 10, 11 and rectangular prisms 8, 9 having prescribed shapes are manufactured, and multilayered dielectric films S1, S2 are formed on the surfaces inclusive of hypotenuses of the prisms 8, 9 and the surfaces of the prisms 10, 11 corresponding to said surfaces, then these are adhered together, whereby trapezoidal blocks having the effect of polarization splitters are manufactured. Such trapezoidal blocks are pressed and set on a base plate by facing the surfaces including the bottoms of the trapezoidal blocks on the basis of a rectangular parallelepiped block set on said base plate, and the one trapezoidal block is placed along the rectangular parallelepiped block, whereby the blocks are positioned and set.

10. 发明专利

JPS56120924A VIBRATOR FOR OPTICAL CHOPPER OF LIGHT DETECTING DEVICE 失效
公开(公告)号：JPS56120924A
公开(公告)日：1981-09-22
申请号：JP2413380
申请日：1980-02-29
申请人： NIPPON TELEGRAPH & TELEPHONE , ANRITSU ELECTRIC CO LTD
发明人： MATSUOKA SEIJI , KOBAYASHI IKUTAROU , MINOWA JIYUNICHIROU
IPC分类号： G01J1/04 , B06B1/06 , G01J1/36 , G02B26/04
摘要： PURPOSE:To enable stable maintenance of the position of vibrating pieces and make the device perform stable vibration by forming the vibrating pieces and a supporting part thereof of the vibrator monolithically. CONSTITUTION:This constitution is to maintain in a stable manner the positions of the vibrating pieces for the optical chopper of the light detecting device, which vibrates with single frequency. The vibrating pieces 18 and 19 are made by applying bending processing to two elastic metal plates, the ends on one side of the pieces are bonded by brazing or the like to form the supporting part 20, the other ends thereof connected to the supporting part 20 are opposed to each other at a fixed interval, and a light intercepting piece 9 and a balance piece 10 are formed at the tips thereof. In the vibrator X for the optical chopper thus constituted, a light to be measured, which is emitted from a fiber 21, is condensed at the position of the light intercepting piece 9 of the fork vibrator by a lens 22 and interrupted intermittently. The intermittent light is condensed at a photoelectric transducing element 24 by a lens 23, transduced into electric signals thereby and indicated in a meter or the like.

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