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公开(公告)号：CA2266950A1
公开(公告)日：1999-09-27
申请号：CA2266950
申请日：1999-03-25
Applicant: HITACHI CABLE , NGK INSULATORS LTD
Inventor： YUHARA TOSHIYA , ICHIGI TAKENORI , OHNUKI WATARU , TOYODA SHUHEI , TETSU TOSHIYUKI , SOEKAWA HIROKAZU
Abstract: Disclosed is an optical fiber gyroscope comprising a fiber coil composed of a lengthy optical fiber wound therearound in a predetermined number of turns, a coupler for optically coupling an optical fiber led from a light source and an optical fiber led to a photodetector, and an optical IC chip arranged between the fiber coil and the coupler and provided with a phase modulator and a polarizer mounted on an optical waveguide, the optical fiber gyroscope further comprising a fiber coil reel around which the lengthy optical fiber for constructing the fiber coil is wound in the predetermined number of turns, a coupler reel around which the optical fibers led in both directions from the coupler are wound in a predetermined number of turns, and a housing member including a plurality of compartments (reel-placing region, frame, frame) for accommodating at least the both reels, the light source, and the optical IC chip. Accordingly, the optical fiber gyroscope can be easily assembled in unit, and it is possible to effectively reduce the production cost of the optical fiber gyroscope.
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公开(公告)号：DE69212513D1
公开(公告)日：1996-09-05
申请号：DE69212513
申请日：1992-02-27
Applicant: NGK INSULATORS LTD
Inventor： TOYODA SHUHEI , OSUGI YUKIHISA
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公开(公告)号：DE68909710D1
公开(公告)日：1993-11-11
申请号：DE68909710
申请日：1989-07-27
Applicant: NGK INSULATORS LTD
Inventor： ABE HIROAKI MINAMIKAZOKU APART , TOYODA SHUHEI
IPC: G01R15/24 , G01R33/032 , G02B5/30 , G02B27/28 , G02F1/09
Abstract: An optical unit or an optical sensor through which a light beam is propagated in a predetermined direction, having an optical component (2) which includes at least one first single crystal element (2R) each having a property of causing dextrorotation of a plane of polarization of the light beam during propagation of the beam, and at least one second single crystal element (2L) each having a property of causing levorotation of the plane of polarization of the light beam. The first and second single crystal elements (2R, 2L) are superposed on each other in a direction perpendicular to the direction of propagation of the beam. The single crystal elements (2R, 2L) may be bonded together by direct solid-solid reaction, or by diffusion of a material of a thin bonding film interposed between the adjacent single crystal elements. The single crystal elements also exhibit a magnetooptical or Faraday effect when used in a magnetic-field sensor, for example.
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公开(公告)号：CA2266950C
公开(公告)日：2002-02-12
申请号：CA2266950
申请日：1999-03-25
Applicant: HITACHI CABLE , NGK INSULATORS LTD
Inventor： SOEKAWA HIROKAZU , TOYODA SHUHEI , YUHARA TOSHIYA , ICHIGI TAKENORI , OHNUKI WATARU , TETSU TOSHIYUKI
Abstract: Disclosed is an optical fiber gyroscope comprising a fiber coil composed of a lengthy optical fiber wound therearound in a predetermined number of turns, a coupler for optically coupling an optical fiber led from a light source and an optical fiber led to a photodetector, and an optical IC chip arranged between the fiber coil and the coupler and provided with a phase modulator and a polarizer mounted on an optical waveguide, the optical fiber gyroscope further comprising a fiber coil reel around which the lengthy optical fiber for constructing the fiber coil is wound in the predetermined number of turns, a coupler reel around which the optical fibers led in both directions from the coupler are wound in a predetermined number of turns, and a housing member including a plurality of compartments (reel-placing region, frame, frame) for accommodating at least the both reels, the light source, and the optical IC chip. Accordingly, the optical fiber gyroscope can be easily assembled in unit, and it is possible to effectively reduce the production cost of the optical fiber gyroscope.
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公开(公告)号：DE68921380D1
公开(公告)日：1995-04-06
申请号：DE68921380
申请日：1989-07-10
Applicant: NGK INSULATORS LTD
Inventor： TOYODA SHUHEI , TAKAHASHI AKIHIRO
IPC: G02F1/03
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Patent Agency Ranking
公开(公告)号：DE69212513T2
公开(公告)日：1997-01-30
申请号：DE69212513
申请日：1992-02-27
Applicant: NGK INSULATORS LTD
Inventor： TOYODA SHUHEI , OSUGI YUKIHISA
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公开(公告)号：DE68921380T2
公开(公告)日：1995-09-21
申请号：DE68921380
申请日：1989-07-10
Applicant: NGK INSULATORS LTD
Inventor： TOYODA SHUHEI , TAKAHASHI AKIHIRO
IPC: G02F1/03
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公开(公告)号：DE68909710T2
公开(公告)日：1994-05-05
申请号：DE68909710
申请日：1989-07-27
Applicant: NGK INSULATORS LTD
Inventor： ABE HIROAKI MINAMIKAZOKU APART , TOYODA SHUHEI
IPC: G01R15/24 , G01R33/032 , G02B5/30 , G02B27/28 , G02F1/09
Abstract: An optical unit or an optical sensor through which a light beam is propagated in a predetermined direction, having an optical component (2) which includes at least one first single crystal element (2R) each having a property of causing dextrorotation of a plane of polarization of the light beam during propagation of the beam, and at least one second single crystal element (2L) each having a property of causing levorotation of the plane of polarization of the light beam. The first and second single crystal elements (2R, 2L) are superposed on each other in a direction perpendicular to the direction of propagation of the beam. The single crystal elements (2R, 2L) may be bonded together by direct solid-solid reaction, or by diffusion of a material of a thin bonding film interposed between the adjacent single crystal elements. The single crystal elements also exhibit a magnetooptical or Faraday effect when used in a magnetic-field sensor, for example.
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公开(公告)号：JP2000121868A
公开(公告)日：2000-04-28
申请号：JP29400498
申请日：1998-10-15
Applicant: NGK INSULATORS LTD
Inventor： TOYODA SHUHEI , KONDO JUNGO , MATSUMOTO AKIRA
IPC: G02B6/30
Abstract: PROBLEM TO BE SOLVED: To increase the connection strength between the optical waveguide substrate and a fixing member without using any reinforcing plate and to improve the connection strength when they area left as they are under high- temperature, high-humidity conditions and applied with a thermal shock in a connection body of the optical waveguide substrate and at least one optical fiber fixing member having an optical fiber fixing groove. SOLUTION: The optical waveguide substrate 2 is formed between a couple of end surfaces where optical waveguide are exposed, and a couple of main surfaces and a couple of flanks which are formed between the couple of end surfaces. Fixing member 3A has a connection-side end surface 3a, an external end surface on the opposite side from the connection-side end surface, and a couple of main surfaces and a couple of flanks 3c. A step part 4A is formed between one end surface 2a to which the end surface 2a of the substrate 2 and the end surface 3a of the fixing member 3A are connected with an adhesive layer 20 formed of a resin adhesive and the connection-side end surface 3a and a meniscus part 21 which connects with the adhesive layer 20 and is formed of a resin adhesive is formed at the step part 4A.
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公开(公告)号：JPH11333688A
公开(公告)日：1999-12-07
申请号：JP2605999
申请日：1999-02-03
Applicant: NGK INSULATORS LTD
Inventor： TOYODA SHUHEI , HAMASHIMA AKIRA
Abstract: PROBLEM TO BE SOLVED: To high-precisely polish the end face of an array member fixed at the end parts of optical fibers respectively led out from a plurality of reels, to almost eliminate unevenness in polishing precision between array members, and to manufacture an optical part with high precision and high yield. SOLUTION: A jig 300 for manufacturing an optical part comprises a base seat 302 on which 10 reels 100 for a fiber coil around which an optical fiber is wound in a given pattern are loaded; and an array holding mechanism 346 wherein the end faces of the arrays respectively fixed at the end parts of a plurality of optical fibers led out from the ten reels 100 for loaded on the peripheral surface are exposed to below.
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