WO2001095010A3 - A safe procedure for moving mirrors in an optical cross-connect switch - Google Patents

A safe procedure for moving mirrors in an optical cross-connect switch Download PDF

Info

Publication number
WO2001095010A3
WO2001095010A3 PCT/US2001/017768 US0117768W WO0195010A3 WO 2001095010 A3 WO2001095010 A3 WO 2001095010A3 US 0117768 W US0117768 W US 0117768W WO 0195010 A3 WO0195010 A3 WO 0195010A3
Authority
WO
WIPO (PCT)
Prior art keywords
optical cross
connect switch
reflector
moving mirrors
safe procedure
Prior art date
Application number
PCT/US2001/017768
Other languages
French (fr)
Other versions
WO2001095010A2 (en
Inventor
Peter Hunt
Adrian Keating
Kevin White
Original Assignee
Calient Networks Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Calient Networks Inc filed Critical Calient Networks Inc
Publication of WO2001095010A2 publication Critical patent/WO2001095010A2/en
Publication of WO2001095010A3 publication Critical patent/WO2001095010A3/en

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/26Optical coupling means
    • G02B6/35Optical coupling means having switching means
    • G02B6/3586Control or adjustment details, e.g. calibrating
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/0816Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
    • G02B26/0833Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD
    • G02B26/0841Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD the reflecting element being moved or deformed by electrostatic means
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/26Optical coupling means
    • G02B6/35Optical coupling means having switching means
    • G02B6/351Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements
    • G02B6/3512Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements the optical element being reflective, e.g. mirror
    • G02B6/3518Optical coupling means having switching means involving stationary waveguides with moving interposed optical elements the optical element being reflective, e.g. mirror the reflective optical element being an intrinsic part of a MEMS device, i.e. fabricated together with the MEMS device
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/26Optical coupling means
    • G02B6/35Optical coupling means having switching means
    • G02B6/354Switching arrangements, i.e. number of input/output ports and interconnection types
    • G02B6/35543D constellations, i.e. with switching elements and switched beams located in a volume
    • G02B6/3556NxM switch, i.e. regular arrays of switches elements of matrix type constellation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S359/00Optical: systems and elements
    • Y10S359/90Methods

Abstract

A method of moving reflectors in an optical cross-connect switch. In one embodiment, the optical cross-connect switch identifies a reflector path avoiding possible interference with other reflectors, predicts the reflector path from precomputed tables, and moves the reflector in a straight line in target reflector plane coordinates from initial position to target position.
PCT/US2001/017768 2000-06-05 2001-05-31 A safe procedure for moving mirrors in an optical cross-connect switch WO2001095010A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/586,730 2000-06-05
US09/586,730 US6728016B1 (en) 2000-06-05 2000-06-05 Safe procedure for moving mirrors in an optical cross-connect switch

Publications (2)

Publication Number Publication Date
WO2001095010A2 WO2001095010A2 (en) 2001-12-13
WO2001095010A3 true WO2001095010A3 (en) 2002-10-17

Family

ID=24346911

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/017768 WO2001095010A2 (en) 2000-06-05 2001-05-31 A safe procedure for moving mirrors in an optical cross-connect switch

Country Status (2)

Country Link
US (1) US6728016B1 (en)
WO (1) WO2001095010A2 (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6610974B1 (en) 2000-06-05 2003-08-26 Calient Networks, Inc. Positioning a movable reflector in an optical switch
US6587611B1 (en) 2000-06-06 2003-07-01 Calient Networks, Inc. Maintaining path integrity in an optical switch
US6678437B2 (en) * 2001-03-30 2004-01-13 Analog Devices, Inc. Method of and architecture for optically switching light communication signals in fiber optic networks and the like
US20020181876A1 (en) * 2001-05-18 2002-12-05 Chromux Technologies, Inc Reconfigurable optical add/drop module
US6898341B2 (en) * 2001-10-24 2005-05-24 Intel Corporation Optical system for calibration and control of an optical fiber switch
US6937783B2 (en) * 2002-06-07 2005-08-30 Charles Chu 2-D optical switch with lens mount
US20030091270A1 (en) * 2002-09-23 2003-05-15 Abbott Eric C. Closed-loop control of MEMS mirrors for optical communications
US6907155B2 (en) * 2002-10-15 2005-06-14 Glimmerglass Networks, Inc. Three-dimensional optical switch with annular input-output ports
US9151903B2 (en) * 2013-08-05 2015-10-06 Calient Technologies, Inc. Making lightless connections in an optical circuit switch
US9590998B2 (en) 2014-07-02 2017-03-07 Calient Technologies, Inc. Network switch with hierarchical security
US9213143B1 (en) 2014-07-02 2015-12-15 Calient Technologies, Inc. Making connections through an optical circuit switch
WO2016172819A1 (en) 2015-04-27 2016-11-03 华为技术有限公司 Transmission path establishment method and apparatus for optical signal exchange
US9853879B2 (en) * 2015-08-12 2017-12-26 xCelor LLC Systems and methods for identifying interconnections among physical-layer cross-connect switches
US9960990B2 (en) 2015-08-12 2018-05-01 xCelor LLC Systems and methods for monitoring and managing communication paths
US10353851B2 (en) 2015-08-12 2019-07-16 xCelor LLC Systems and methods for implementing a physical-layer cross connect
US10936598B2 (en) 2017-11-21 2021-03-02 Gto Llc Systems and methods for targeted exchange emulation
US11693187B2 (en) * 2020-02-14 2023-07-04 Google Llc Multi-axis MEMS mirror parking
US11454769B2 (en) * 2020-10-02 2022-09-27 X Development Llc Determining pointing accuracy using optical fiber bundle
US11555895B2 (en) * 2021-04-20 2023-01-17 Innovusion, Inc. Dynamic compensation to polygon and motor tolerance using galvo control profile
US11662440B2 (en) 2021-05-21 2023-05-30 Innovusion, Inc. Movement profiles for smart scanning using galvonometer mirror inside LiDAR scanner
CN113484956B (en) * 2021-06-15 2022-12-06 昂纳信息技术(深圳)有限公司 Optical switch channel switching method, system, optical switch and storage medium

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05107485A (en) * 1991-10-18 1993-04-30 Nippon Telegr & Teleph Corp <Ntt> Optical connection module
DE19757181A1 (en) * 1997-12-19 1999-07-01 Bosch Gmbh Robert Arrangement for coupling glass fibers
WO1999067666A1 (en) * 1998-06-05 1999-12-29 Astarte Fiber Networks, Inc. Mirror based fiber optic switch and control system

Family Cites Families (96)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2982859A (en) 1959-02-04 1961-05-02 Engelhard Hanovia Inc Light communication alinement system
DE1255541B (en) 1965-12-15 1967-11-30 Nippon Electric Co Optical communication arrangement
US4274712A (en) 1979-01-24 1981-06-23 Sener, Ingenieria Y Sistemas, S.A. Solar radiation reflectors adapted to track the incident rays of the sun
FR2458195B1 (en) 1979-05-30 1986-02-28 Materiel Telephonique VERY LARGE NUMBER OF CHANNELS OPTICAL SWITCH
US4421381A (en) 1980-04-04 1983-12-20 Yokogawa Hokushin Electric Corp. Mechanical vibrating element
US4574191A (en) 1982-12-30 1986-03-04 The United States Of America As Represented By The Secretary Of The Army Wide field-of-view laser spot tracker
JPS60107017A (en) 1983-11-16 1985-06-12 Hitachi Ltd Optical deflecting element
US4626066A (en) 1983-12-30 1986-12-02 At&T Bell Laboratories Optical coupling device utilizing a mirror and cantilevered arm
DE3413667A1 (en) 1984-04-11 1985-10-17 Siemens AG, 1000 Berlin und 8000 München METHOD FOR ADJUSTING A COUPLING OPTICS PROVIDED AT THE END OF AN OPTICAL WAVE GUIDE TO A SEMICONDUCTOR LASER, AND DEVICE FOR CARRYING OUT THE METHOD
US4614868A (en) 1984-10-12 1986-09-30 Caterpillar Industrial Inc. Fiber optic seam tracking apparatus
US4677290A (en) 1985-04-12 1987-06-30 Tektronix, Inc. Method of aligning an optical fiber with a light emitter via directing light toward light emitter acting as a detector
DE3514647A1 (en) 1985-04-23 1986-10-23 Siemens AG, 1000 Berlin und 8000 München METHOD FOR APPROXIMATING THE ENDS OF TWO FOCUS AND AND DEVICE FOR IMPLEMENTING THEM
GB2175705B (en) 1985-05-24 1989-04-19 Stc Plc Dirigible reflector and mounting made of crystal material
US4696062A (en) 1985-07-12 1987-09-22 Labudde Edward V Fiber optic switching system and method
US5172262A (en) 1985-10-30 1992-12-15 Texas Instruments Incorporated Spatial light modulator and method
US4823402A (en) 1986-04-21 1989-04-18 Trw Inc. Agile optical beam steering system
US4838631A (en) 1986-12-22 1989-06-13 General Electric Company Laser beam directing system
US4838637A (en) 1987-05-04 1989-06-13 Unisys Corporation Integrated solid state non-volatile fiber optic switchboard
US4859012A (en) 1987-08-14 1989-08-22 Texas Instruments Incorporated Optical interconnection networks
US4892388A (en) 1987-10-13 1990-01-09 Texas A & M University System Method for producing reflective taps in optical fibers and applications thereof
US5495328A (en) 1988-04-18 1996-02-27 3D Systems, Inc. Apparatus and method for calibrating and normalizing a stereolithographic apparatus
US5077815A (en) 1988-09-30 1991-12-31 Fujitsu Limited Apparatus for optically connecting a single-mode optical fiber to a multi-mode optical fiber
US5097354A (en) 1989-07-27 1992-03-17 Omron Corporation Beam scanner
US4981335A (en) 1989-10-17 1991-01-01 At&T Bell Laboratories Optical package arrangement with reduced reflections
GB2239101B (en) 1989-11-17 1993-09-22 Marconi Gec Ltd Optical device
US5077622A (en) 1990-05-31 1991-12-31 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Apparatus for precision focussing and positioning of a beam waist on a target
US5177348A (en) 1991-08-26 1993-01-05 Herzel Laor Apparatus and method for aligning optical fibers with an array of radiation emitting devices
US5627669A (en) 1991-11-13 1997-05-06 Canon Kabushiki Kaisha Optical transmitter-receiver
US5383118A (en) 1992-09-23 1995-01-17 At&T Corp. Device alignment methods
JP2579111B2 (en) 1992-12-15 1997-02-05 松下電器産業株式会社 Compact optical scanner driven by electrostatic force
GB2275787A (en) 1993-03-05 1994-09-07 British Aerospace Silicon micro-mirror unit
JP3119540B2 (en) 1993-04-12 2000-12-25 松下電器産業株式会社 Light tap
EP0637879A1 (en) 1993-04-16 1995-02-08 Nec Corporation Hitless switching apparatus and method for optical network
US5673139A (en) 1993-07-19 1997-09-30 Medcom, Inc. Microelectromechanical television scanning device and method for making the same
US5488862A (en) 1993-10-18 1996-02-06 Armand P. Neukermans Monolithic silicon rate-gyro with integrated sensors
US5629790A (en) 1993-10-18 1997-05-13 Neukermans; Armand P. Micromachined torsional scanner
JP2859112B2 (en) 1993-11-26 1999-02-17 日本電気 株式会社 Light emitting array module
US5440654A (en) 1993-12-30 1995-08-08 Raytheon Company Fiber optic switching system
US5438638A (en) 1994-04-05 1995-08-01 Tektronix, Inc. Electrically controlled mechanical optical switch
US5467191A (en) 1994-05-20 1995-11-14 Hughes Aircraft Company Sample point interferometer for measuring changes in figure of a primary mirror and primary-secondary mirror spacing
US5963682A (en) 1994-05-24 1999-10-05 Raytheon Company Optical beam steering system
US5444801A (en) 1994-05-27 1995-08-22 Laughlin; Richard H. Apparatus for switching optical signals and method of operation
US5623337A (en) 1994-09-28 1997-04-22 Nec Corporation Method capable of quickly adjusting an optical axis of an optical fiber
US5546484A (en) 1994-10-14 1996-08-13 Kaptron, Inc. Fiber optic switch using polished-type directional coupler
DE4437284A1 (en) 1994-10-18 1996-04-25 Eos Electro Optical Syst Method for calibrating a controller to deflect a laser beam
US5524153A (en) 1995-02-10 1996-06-04 Astarte Fiber Networks, Inc. Optical fiber switching system and method using same
KR19980703248A (en) 1995-03-24 1998-10-15 로이드배리조지윌리엄 Optical network and optical network element
JP2987750B2 (en) 1995-05-26 1999-12-06 日本信号株式会社 Planar type electromagnetic actuator
GB2303988A (en) 1995-07-31 1997-03-05 Secr Defence Thermal imaging system with detector array calibration mode
US5907425A (en) 1995-12-19 1999-05-25 The Board Of Trustees Of The Leland Stanford Junior University Miniature scanning confocal microscope
US5671304A (en) 1995-12-21 1997-09-23 Universite Laval Two-dimensional optoelectronic tune-switch
US5621829A (en) 1996-04-02 1997-04-15 Lucent Technologies Inc. Fiber optic switching device and method using free space scanning
US5726815A (en) 1996-04-12 1998-03-10 Fusion Uv Systems, Inc. Apparatus for aligning the object focus in filament irradiating units
US5872880A (en) 1996-08-12 1999-02-16 Ronald S. Maynard Hybrid-optical multi-axis beam steering apparatus
US5914801A (en) 1996-09-27 1999-06-22 Mcnc Microelectromechanical devices including rotating plates and related methods
US5841917A (en) * 1997-01-31 1998-11-24 Hewlett-Packard Company Optical cross-connect switch using a pin grid actuator
US5867297A (en) 1997-02-07 1999-02-02 The Regents Of The University Of California Apparatus and method for optical scanning with an oscillatory microelectromechanical system
US6097859A (en) 1998-02-12 2000-08-01 The Regents Of The University Of California Multi-wavelength cross-connect optical switch
US6057921A (en) 1997-07-08 2000-05-02 Etec Systems, Inc. Two piece mirror arrangement for interferometrically controlled stage
GB2328312B (en) 1997-08-14 1999-08-04 John Quentin Phillipps Mirror controlled display device
US5960132A (en) 1997-09-09 1999-09-28 At&T Corp. Fiber-optic free-space micromachined matrix switches
US6075639A (en) 1997-10-22 2000-06-13 The Board Of Trustees Of The Leland Stanford Junior University Micromachined scanning torsion mirror and method
US6183918B1 (en) 1997-11-12 2001-02-06 Oki Electric Industry Co., Ltd. Alignment method and system for use in manufacturing an optical filter
JP3401420B2 (en) 1997-11-12 2003-04-28 沖電気工業株式会社 Optical filter alignment device and optical filter alignment method
US6002818A (en) 1997-12-05 1999-12-14 Lucent Technologies Inc Free-space optical signal switch arrangement
US5982554A (en) 1997-12-31 1999-11-09 At&T Corp Bridging apparatus and method for an optical crossconnect device
US6249626B1 (en) 1998-03-06 2001-06-19 Lucent Technologies, Inc. Multimode fiber optical power monitoring tap for optical transmission systems
US6125335A (en) 1998-04-10 2000-09-26 Sun Nuclear Corporation Wide field calibration of a multi-sensor array
US6253010B1 (en) 1998-04-17 2001-06-26 Iolon, Inc. System and method for efficient coupling between optical elements
US6147790A (en) 1998-06-02 2000-11-14 Texas Instruments Incorporated Spring-ring micromechanical device
US6430332B1 (en) 1998-06-05 2002-08-06 Fiber, Llc Optical switching apparatus
US6097860A (en) 1998-06-05 2000-08-01 Astarte Fiber Networks, Inc. Compact optical matrix switch with fixed location fibers
CA2331990A1 (en) 1998-06-05 1999-12-23 Astarte Fiber Networks, Inc. Planar array optical switch and method
US6101299A (en) 1998-06-05 2000-08-08 Astarte Fiber Networks, Inc. Optical switch targeting system
US6320993B1 (en) 1998-06-05 2001-11-20 Astarte Fiber Networks, Inc. Optical switch pathway configuration using control signals
US6097858A (en) 1998-06-05 2000-08-01 Astarte Fiber Networks, Inc. Sensing configuration for fiber optic switch control system
KR20010085809A (en) 1998-09-15 2001-09-07 추후보정 Flexible, modular, compact fiber optic switch
US6049412A (en) 1998-09-22 2000-04-11 Lucent Technologies, Inc. Reflective Faraday-based optical devices including an optical monitoring tap
JP3264368B2 (en) 1998-10-16 2002-03-11 日本電気株式会社 Adjustment method of reduction projection type exposure apparatus
US6031656A (en) 1998-10-28 2000-02-29 Memsolutions, Inc. Beam-addressed micromirror direct view display
US6256430B1 (en) 1998-11-23 2001-07-03 Agere Systems Inc. Optical crossconnect system comprising reconfigurable light-reflecting devices
JP2000162519A (en) 1998-11-30 2000-06-16 Oki Electric Ind Co Ltd Optical switch
US6208784B1 (en) 1998-12-07 2001-03-27 Multiplex Raceway Systems, Inc. Fiber optic multiple access system
US6317530B1 (en) 1998-12-28 2001-11-13 Lucent Technologies Micro-opto mechanical multistage interconnection switch
US6061369A (en) 1999-06-01 2000-05-09 Corning Incorporated Wavelength selectable fiber laser system
US6236481B1 (en) 1999-06-09 2001-05-22 Astarte Fiber Networks, Inc. Method and apparatus for providing loss equalization and adjustment in a fiber optic network
JP3993343B2 (en) 1999-06-29 2007-10-17 富士通株式会社 Galvano micro mirror
US6245590B1 (en) 1999-08-05 2001-06-12 Microvision Inc. Frequency tunable resonant scanner and method of making
US6222679B1 (en) 1999-08-31 2001-04-24 Agilent Technologies Mechanically simplified, high resolution, optical focusing and steering apparatus
US6571030B1 (en) 1999-11-02 2003-05-27 Xros, Inc. Optical cross-connect switching system
CA2389589A1 (en) 1999-11-02 2001-05-31 Robert R. Ward 1+1 fault protection in a network of optical cross-connect switching systems
US7187649B1 (en) 1999-12-27 2007-03-06 Alcatel Lucent Method and apparatus for providing network protection at input/output interfaces of a cross-connect switch
US6253001B1 (en) 2000-01-20 2001-06-26 Agilent Technologies, Inc. Optical switches using dual axis micromirrors
US6396975B1 (en) 2000-01-21 2002-05-28 Jds Uniphase Corporation MEMS optical cross-connect switch
US6330102B1 (en) 2000-03-24 2001-12-11 Onix Microsystems Apparatus and method for 2-dimensional steered-beam NxM optical switch using single-axis mirror arrays and relay optics
US6347167B1 (en) 2000-04-14 2002-02-12 C Speed Corporation Fiber optic cross connect with uniform redirection length and folding of light beams

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05107485A (en) * 1991-10-18 1993-04-30 Nippon Telegr & Teleph Corp <Ntt> Optical connection module
DE19757181A1 (en) * 1997-12-19 1999-07-01 Bosch Gmbh Robert Arrangement for coupling glass fibers
WO1999067666A1 (en) * 1998-06-05 1999-12-29 Astarte Fiber Networks, Inc. Mirror based fiber optic switch and control system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
LAU K Y: "MEM'S THE WORD FOR OPTICAL BEAM MANIPULATION", IEEE CIRCUITS AND DEVICES MAGAZINE, IEEE INC. NEW YORK, US, vol. 13, no. 4, July 1997 (1997-07-01), pages 11 - 18, XP000831634, ISSN: 8755-3996 *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 461 (P - 1598) 23 August 1993 (1993-08-23) *

Also Published As

Publication number Publication date
WO2001095010A2 (en) 2001-12-13
US6728016B1 (en) 2004-04-27

Similar Documents

Publication Publication Date Title
WO2001095010A3 (en) A safe procedure for moving mirrors in an optical cross-connect switch
AU4696800A (en) Gas discharge laser with gas temperature control
AU3471899A (en) Beam shaping optics for diverging illumination, such as produced by laser diodes
WO2001009904A3 (en) Multilayer optics with adjustable working wavelength
DE60231798D1 (en) INJECTION SYNCHRONIZED LASER WITH PRECISE TIME CONTROL
ITRM960346A0 (en) COMBINED FLIP-UP HOUSING WITH SINGLE BODY WITH ACTUATOR ELEMENT FOR SWITCH AND STOPPING MECHANISM FOR FOLDABLE PHONE.
AU2001284953A1 (en) Safe distance algorithm for adaptive cruise control
WO2004000645A8 (en) Aircraft position light
AU1410501A (en) Treating a target with a divided laser beam
IT1243170B (en) PLASMA CUTTING TORCH WITH TRIGGER FOR CONTACT
AU3730100A (en) Improved optical reflector for micro-machined mirrors
AU2002337944A1 (en) Extendable tracking by line auto-calibration
DE60217433D1 (en) Laser blasting device with variable opening angle
AU2002248496A1 (en) Vcsel with single lasing-reflectivity peak reflector
AU2002331039A1 (en) Continuous path, variable width light attenuation device for electromagnetic energy spot cure system
AU2001268234A1 (en) High speed optical intelligent switch
FR2783039B1 (en) SAFETY CLOSING LIGHT, ESPECIALLY FOR EXPLOSIVE ATMOSPHERES
EP1043545A3 (en) Reflecting mirror manufacture method and lamp assembly
WO2002077573A3 (en) Transceiver device for cooperation with an optical fiber
TW495039U (en) Reflection plane movable light switch
CA2364402A1 (en) Method and apparatus for monitoring fiber optic communications
TW454881U (en) Optical switch for moving the light-transmissive crystal with reflection coating
AU2002308501A1 (en) Optical switch with moveable holographic optical element
AUPP838699A0 (en) Laser sighting device for firearms
WO2001043241A3 (en) Tunable laser with microactuator

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): CA JP

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
AK Designated states

Kind code of ref document: A3

Designated state(s): CA JP

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP