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公开(公告)号：JPS63228107A
公开(公告)日：1988-09-22
申请号：JP6014687
申请日：1987-03-17
Applicant: AGENCY IND SCIENCE TECHN , SUMITA OPTICAL GLASS
Inventor： MIHASHI YOSHINOBU , ISHIHARA SATOSHI , KIKUCHI KEISUKE , TAGAWA MASAFUMI
Abstract: PURPOSE:To permit provision of a smaller space for housing an optical pickup by forming an image to one point on the lateral side of an optical fiber member apart from the central axial line of the optical fiber. CONSTITUTION:The front end face of the optical fiber member 1 is inclined by an angle phi with the central axial line of the optical fiber to form a light reflection surface 4. The curvature X in the inclination direction of the light reflection surface 4 and the curvature Y in the direction perpendicular to the inclination direction are varied and these curvatures are so set that the propagated light forms the image at one point 0 on the lateral side of the optical fiber member 1. The propagated light is, therefore, constituted of the reflected light governed by the curvature X in the inclination direction at the light reflection surface 4 and the reflected light governed by the curvature Y in the direction perpendicular to the reflection direction. Since the disposition of the optical fiber 1 in parallel with, for example, the reflection recording surface of an optical disk is thereby permitted, the use of this device as a compact optical pickup is possible.
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公开(公告)号：JPS61209405A
公开(公告)日：1986-09-17
申请号：JP5075885
申请日：1985-03-14
Applicant: AGENCY IND SCIENCE TECHN , HITACHI CABLE
Inventor： MIHASHI YOSHINOBU , ISHIHARA SATOSHI , UETSUKA NAOTO
Abstract: PURPOSE:To weld and connect two vertically cut plarization plane maintaining optical fibers so that the orientations of birefringence axes can be equal by providing a rotating mechanism for rotating either one of optical fibers and a microscope having rotatable polarizer provided with a moving mechanism for moving the optical fiber in its longitudinal direction. CONSTITUTION:The polarization plane maintaining optical fiber 11a is irradiated from a light source 11a in the so-called orthogonally intersecting Nicol's prism where the polarized axes of two polarizers 13a and 16 intersect orthogonally, and the optical fiber 1a immensersed in a matching solution 8a is entered between the polarizers 13a and 16, whereby the birefringence axes can be observed. A microscope 15 is shifted by the moving mechanism 17, whereby the birefringence axes of the polarization plane maintaining optical fiber 1b can be observed. The rotation of a motor 6 can rotate the polarization plane maintaining optical fiber 1a with the aid of the rotating mechanism 5 so that the birefringence axes of two polarization plane maintaining optical fibers 1a and 1b can be equal, after which the cut facets of said fibers 1a and 1b are fused and connected by discharging an electric charge between electrodes 2a and 2b so that the birefringence axes can be equal.
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公开(公告)号：JPH01142512A
公开(公告)日：1989-06-05
申请号：JP29955787
申请日：1987-11-27
Applicant: AGENCY IND SCIENCE TECHN , TOKYO AIRCRAFT INSTR CO
Inventor： MIHASHI YOSHINOBU , ISHIHARA SATOSHI , TSUCHIDA HIDEMI , YOSHIDA JUNICHI , HANAWA MORITOMO , NISHIDE KENICHI , KONDO TOSHIO
Abstract: PURPOSE:To produce a semiconductor laser with an optical fiber without using a special assembling device by adjusting and fixing a ferrule of an optical fiber assembly inserted into the central hole of a holder by means of plural pieces of screws directed to the central direction in such a manner that the center at the end part of the optical fiber aligns to the beam waist of laser light. CONSTITUTION:This laser device has the holder 6 which supports a semiconductor laser 1 and releases the focused laser light in the optical axis direction and the optical fiber assembly consisting of the optical fiber 8 and the ferrule 9 holding the fiber. The device is constituted by adjusting and fixing the ferrule of the optical fiber assembly inserted into the central hole of the holder 6 by means of plural pieces of the screws 7 directed toward the central direction in such a manner that the center at the end of the optical fiber 8 aligns to the beam waist of the laser light. The semiconductor laser device with the optical fiber which can be produced without using techniques such as welding is thus obtd. by the simple constitution to allow the easy alignment of the optical axis.
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公开(公告)号：JPH01141315A
公开(公告)日：1989-06-02
申请号：JP29955687
申请日：1987-11-27
Applicant: AGENCY IND SCIENCE TECHN , TOKYO AIRCRAFT INSTR CO
Inventor： MIHASHI YOSHINOBU , ISHIHARA SATOSHI , TSUCHIDA HIDEMI , YOSHIDA JUNICHI , NISHIDE KENICHI , KONDO TOSHIO
IPC: G01D5/30
Abstract: PURPOSE:To obtain the device which can detect a movement of an object in a remote place by radiating a laser light to an object through a coupling optical system and recoupling its reflected light to the original semiconductor laser to utilize a self-coupling effect of a semiconductor laser. CONSTITUTION:On an object whose displacement is to be detected, a displacement part (slit plate) 5 having a surface pattern formed by a difference of a reflection factor is provided. With respect to this displacement part 5, a laser light emitted from a semiconductor laser 1 is transmitted by an optical fiber 3 and radiated, and also, its reflected light is made reincident on the original semiconductor laser 1 through the same optical fiber 3. Subsequently, by a characteristic variation detecting means (photodetector) 2, a variation of an operation characteristic of the semiconductor laser 1 caused by a variation of the return light quantity due to a displacement of the displacement part 5 is detected, and based on its result, a displacement of the displacement part 5 is detected.
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公开(公告)号：JPS643025A
公开(公告)日：1989-01-06
申请号：JP15852087
申请日：1987-06-25
Applicant: AGENCY IND SCIENCE TECHN , HITACHI CABLE
Inventor： YAJIMA HIROYOSHI , ISHIHARA SATOSHI , MIHASHI YOSHINOBU , UETSUKA NAOTO
Abstract: PURPOSE:To enable the formation of a glass film of uniform thickness by allowing the base for depositing a glass film thereon to get near or away to the oxyhydrogen flame at the top of the burner, as it is rotating. CONSTITUTION:Base plates 2 for a glass film to be deposited are arranged on the surface periphery of the turn table 3 rotating at a constant speed and glass fine particles are blown from the deposition nozzle 7 on the top surfaces of the bases 2 to form a glass film on each base plate. At this time, the system is provided with a transferring unit (consisting of, e.g., a control motor 16, screw mechanism 15, moving bed 14, and shaft 20) which can allow the turn table 3 as well as the base plates 2 on the turn table 3 to get near or away to the deposition nozzle 7.
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Patent Agency Ranking
公开(公告)号：JPS6269138A
公开(公告)日：1987-03-30
申请号：JP20893985
申请日：1985-09-24
Applicant: AGENCY IND SCIENCE TECHN , TOKYO AIRCRAFT INSTR CO
Inventor： ISHIHARA SATOSHI , MIHASHI YOSHINOBU , YOSHIDA JUNICHI
Abstract: PURPOSE:To simplify the measuring procedure by fixing an emitting end of an optical fiber to be measured so that two orthogonal polarization modes which are propagated in the optical fiber to be measured are contained simultaneously and roughly uniformly in two optical paths of two luminous flux interferometers. CONSTITUTION:A incident light from a light source LS is made incident uniformly on two main axes of an optical fiber to be measured F, two orthogonal polarization modes are excited uniformly, and an emitted light from the fiber F is separated on each plane of polarization to two optical paths by a polarization separating element P. In such a state, light of one optical path pulse 1 transmits through a half mirror HM and reflected by a movable mirror Mv, reaches the mirror FM and reflected, and made incident on a photodetector PD. Also, light of the other optical path 2 is reflected by a fixed mirror M, a plane of polarization is rotated by 90 deg. by a 1/2 wavelength plate lambda/2, and goes to the same plane of polarization as the light of the path 1, and the light transmits through the mirror FM, passes through the same optical path as the path 1, and made incident on the detector PD. Accordingly, by giving an optical path length difference of two optical paths by varying a position of the movable mirror Mv, a group delay difference between two orthogonal polarization modes which are emitted from the fiber F can be derived.
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公开(公告)号：JPH03104862A
公开(公告)日：1991-05-01
申请号：JP24065689
申请日：1989-09-19
Applicant: AGENCY IND SCIENCE TECHN , NIPPON STEEL CORP
Inventor： MINETA YUKIE , OBARA AKIRA , OKAJI YOSHITAKA , MIHASHI YOSHINOBU , OGURA SHIGEKI , YASUNAGA NOBUO
Abstract: PURPOSE:To increase a vapor deposition speed with a low-output laser beam and to form a hard amorphous carbon film by connecting a cathode power source to a vacuum chamber, anode and a material for vapor deposition. CONSTITUTION:The material 3 for vapor deposition connected to the cathode power source 2 is disposed in the vacuum chamber 1. The quantity of evaporat ing particles increases sharply when the voltage of the cathode power source 2 is increased to the certain threshold value. A discharge current is thereafter adjusted by the cathode power source 2 to adjust the quantity of the evaporating particles to be produced. The evaporating particles jump out toward a sample substrate 4 and deposit by vapor deposition on the substrate 4. Graphite is used as the material 3 for vapor deposition and is evaporated by the irradiation with the laser beam 7 and electric discharge and is deposited by evaporation on the substrate 4 to which a negative voltage is impressed by the cathode power source 12 in the case of formation of the hard carbon film. The vapor deposition surface of the substrate 4 is irradiated with the ions contg. hydrogen by an ion gun 13 at this time.
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公开(公告)号：JPS6444079A
公开(公告)日：1989-02-16
申请号：JP20143187
申请日：1987-08-12
Applicant: AGENCY IND SCIENCE TECHN , HITACHI CABLE
Inventor： YAJIMA HIROYOSHI , ISHIHARA SATOSHI , MIHASHI YOSHINOBU , UETSUKA NAOTO , HONGO AKISHI
Abstract: PURPOSE:To perform a CO2 laser which has a small size and does not need a forced cooling by providing a waveguide formed of a clad layer in a quartz glass body. CONSTITUTION:A waveguide 5 formed with a tubular air gap formed in a quartz glass body 1 and a clad layer 4 formed on the inner peripheral wall of the air gap, Brewster's windows 6, 7 and resonance mirrors 8, 9 so buried in the body 1 as to seal the waveguide 5 and to cross the waveguide 5, and a pair of electrodes 10, 11 provided to extend from the waveguide 5 out of the body 1 are provided. CO2 gas is sealed in the waveguide 5. That is, the waveguide 5 is provided in a quartz glass body instead of a discharging glass tube, and the gas is sealed in the waveguide 5. Thus, a miniature CO2 laser having, for example, several cm long is performed, and since it has a small size, forced cooling with water is not required, but a heat sink fin may be sufficiently used.
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公开(公告)号：JPS6424207A
公开(公告)日：1989-01-26
申请号：JP18012087
申请日：1987-07-21
Applicant: AGENCY IND SCIENCE TECHN , HITACHI CABLE
Inventor： MIHASHI YOSHINOBU , ISHIHARA SATOSHI , YAJIMA HIROYOSHI , UETSUKA NAOTO
Abstract: PURPOSE:To obtain a desired branching ratio by projecting a CO2 laser on the clads positioned between the cores of tapered parts and removing part thereof in such a manner that the branching ratio of a coupler attains a prescribed value. CONSTITUTION:After the laser light emitted form a CO2 laser device 8 is curved downward by a mirror 9, the laser light is condensed by a lens 10 and is projected on the clads 5 positioned between the cores 3 and 4 of the tapered parts 7. Since the CO2 laser light has large absorption in SiO2 glass, the laser light irradiated part of the clads 5 consisting of the SiO2 glass are instantaneously evaporated and removed. The coupling from the cores 3 to the cores 4 is mainly executed in a coupling part 6 at this time, but part of the coupling takes place in the tapered parts 7 as well and, therefore, the coupling constant is changed by partly removing the clads 5 between the cores of the tapered parts. The branching ratio (PC:PT) of the coupler is thus adjusted by changing the amt. of the clads 5 to be removed.
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公开(公告)号：JPS63239134A
公开(公告)日：1988-10-05
申请号：JP7538587
申请日：1987-03-27
Applicant: AGENCY IND SCIENCE TECHN , HITACHI CABLE
Inventor： MIHASHI YOSHINOBU , ISHIHARA SATOSHI , YAJIMA HIROYOSHI , UETSUKA NAOTO
IPC: G02B6/00 , C03B8/04 , C03B19/14 , C03B37/014 , C03B37/018 , G02B6/13
Abstract: PURPOSE:To deposit glass corpuscles on many substrates in uniform thickness by specifying the rotational speed of the substrate arranged on a turntable rotating at fixed angular velocity and the translational velocity of a burner supplying glass corpuscles. CONSTITUTION:The substrate is arranged on the truntable 1 rotating at fixed angular velocity omega at the position of the radius gamma distant from the center of the turntable 1. Position gamma at the tip 51 of the burner on the turntable 1 is transformed into a voltage V by a potentiometer 52, the voltage V is read by a voltmeter 53 and a controller 54, the voltage proportional to 1/gamma is impressed on a DC motor 56 through a DC power source 55, and the burner 3 is translationally moved by the burner fixing arm 58 fixed to a trapezoidal screw thread 57. The rotational speed gammaomega of the substrate and the translational velocity dr/dt of the burner 3 are limited to conform to inequalities I and II, and glass corpuscles are supplied from the burner 3 and deposited on the substrate.
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