WO2004102258A3 - Static method for laser speckle reduction and apparatus for reducing speckle - Google Patents

Static method for laser speckle reduction and apparatus for reducing speckle Download PDF

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Publication number
WO2004102258A3
WO2004102258A3 PCT/CA2004/000742 CA2004000742W WO2004102258A3 WO 2004102258 A3 WO2004102258 A3 WO 2004102258A3 CA 2004000742 W CA2004000742 W CA 2004000742W WO 2004102258 A3 WO2004102258 A3 WO 2004102258A3
Authority
WO
WIPO (PCT)
Prior art keywords
input
output
optical
speckle
static method
Prior art date
Application number
PCT/CA2004/000742
Other languages
French (fr)
Other versions
WO2004102258A2 (en
Inventor
Nicolae Miron
Original Assignee
Stockeryale Canada Inc
Nicolae Miron
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 Stockeryale Canada Inc, Nicolae Miron filed Critical Stockeryale Canada Inc
Publication of WO2004102258A2 publication Critical patent/WO2004102258A2/en
Publication of WO2004102258A3 publication Critical patent/WO2004102258A3/en

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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
    • G02B6/10Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/105Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type having optical polarisation effects
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/48Laser speckle optics
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/14Mode converters
    • 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
    • G02B6/28Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/2804Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
    • G02B6/2821Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using lateral coupling between contiguous fibres to split or combine optical signals
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/005Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping

Abstract

An apparatus and method is disclosed for reducing speckle of a laser beam, the apparatus comprising at least one beam-collimating element having an input and an output, at least one birefringent optical coupler having a first and a second inputs, and a first and a second outputs, at least one optical feedback element having an input and an output, the input of the at least one optical feedback element being connected to the second output of the at least one birefringent optical coupler and the output of the at least one optical feedback element being connected to the second input of the at least one birefringent optical coupler, an optical fiber connecting the output of the at least one beam-collimating element to the first input of the at least one birefringent optical coupler, an optical focusing element having an input and an output, and an optical fiber connecting the first output of the at least one birefringent optical coupler to the input of said optical focusing element, wherein said laser beam is provided to said input of said at least one beam-collimating element resulting in said laser beam having reduced speckle at said output of said optical focusing element.
PCT/CA2004/000742 2003-05-15 2004-05-17 Static method for laser speckle reduction and apparatus for reducing speckle WO2004102258A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US47080503P 2003-05-15 2003-05-15
US60/470,805 2003-05-15

Publications (2)

Publication Number Publication Date
WO2004102258A2 WO2004102258A2 (en) 2004-11-25
WO2004102258A3 true WO2004102258A3 (en) 2005-01-06

Family

ID=33452415

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2004/000742 WO2004102258A2 (en) 2003-05-15 2004-05-17 Static method for laser speckle reduction and apparatus for reducing speckle

Country Status (2)

Country Link
US (1) US20050008290A1 (en)
WO (1) WO2004102258A2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7375812B2 (en) * 2005-02-22 2008-05-20 Axsun Technologies, Inc. Method and system for reducing parasitic spectral noise in tunable semiconductor source spectroscopy system
US7413311B2 (en) * 2005-09-29 2008-08-19 Coherent, Inc. Speckle reduction in laser illuminated projection displays having a one-dimensional spatial light modulator
WO2007144816A2 (en) 2006-06-12 2007-12-21 Koninklijke Philips Electronics N.V. A method and a lighting system
US7457330B2 (en) 2006-06-15 2008-11-25 Pavilion Integration Corporation Low speckle noise monolithic microchip RGB lasers
US8724218B2 (en) 2011-07-07 2014-05-13 Reald Inc. Speckle reduction using screen vibration techniques and apparatus
US9229156B2 (en) 2011-07-07 2016-01-05 Reald Inc. Laser systems and methods
US8995061B2 (en) 2011-07-07 2015-03-31 Reald Inc. Speckle reduction using lenslet integrator
WO2014039906A1 (en) 2012-09-06 2014-03-13 Reald Inc. High elastic modulus projection screen substrates
JP6248381B2 (en) 2012-11-02 2017-12-20 ソニー株式会社 Optical system, polarization separating / combining element, and display device
CN109917558A (en) 2013-06-06 2019-06-21 瑞尔D股份有限公司 System and method for vibrating screen to reduce speckle
BR112017004603B1 (en) 2014-09-08 2022-06-07 Reald Inc Methods for Reducing Spots on a Projection Screen and Vibration System for a Projection Screen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000043822A1 (en) * 1999-01-20 2000-07-27 Tropel Corporation Laser illumination with speckle reduction
US6249381B1 (en) * 1998-05-13 2001-06-19 Sony Corporation Illuminating method and illuminating device
WO2001057581A2 (en) * 2000-02-07 2001-08-09 Silicon Light Machines Method and apparatus for reducing laser speckle using polarization averaging
JP2001296503A (en) * 2000-04-13 2001-10-26 Mitsubishi Heavy Ind Ltd Device for reducing speckle

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6240381B1 (en) * 1998-02-17 2001-05-29 Fonix Corporation Apparatus and methods for detecting onset of a signal
US6323984B1 (en) * 2000-10-11 2001-11-27 Silicon Light Machines Method and apparatus for reducing laser speckle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6249381B1 (en) * 1998-05-13 2001-06-19 Sony Corporation Illuminating method and illuminating device
WO2000043822A1 (en) * 1999-01-20 2000-07-27 Tropel Corporation Laser illumination with speckle reduction
WO2001057581A2 (en) * 2000-02-07 2001-08-09 Silicon Light Machines Method and apparatus for reducing laser speckle using polarization averaging
JP2001296503A (en) * 2000-04-13 2001-10-26 Mitsubishi Heavy Ind Ltd Device for reducing speckle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2002, no. 02 2 April 2002 (2002-04-02) *

Also Published As

Publication number Publication date
US20050008290A1 (en) 2005-01-13
WO2004102258A2 (en) 2004-11-25

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