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AU2001271955A1 - Systems and methods for speckle reduction through bandwidth enhancement - Google Patents

Systems and methods for speckle reduction through bandwidth enhancement

Info

Publication number
AU2001271955A1
AU2001271955A1 AU2001271955A AU7195501A AU2001271955A1 AU 2001271955 A1 AU2001271955 A1 AU 2001271955A1 AU 2001271955 A AU2001271955 A AU 2001271955A AU 7195501 A AU7195501 A AU 7195501A AU 2001271955 A1 AU2001271955 A1 AU 2001271955A1
Authority
AU
Australia
Prior art keywords
sub
bandwidth
deltalambda
systems
methods
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
AU2001271955A
Inventor
Jeffrey Glenn Manni
Robert Jens Martinsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Corp for Laser Optics Research
Original Assignee
Corp for Laser Optics Research
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 Corp for Laser Optics Research filed Critical Corp for Laser Optics Research
Publication of AU2001271955A1 publication Critical patent/AU2001271955A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • H04N9/3161—Modulator illumination systems using laser light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/48—Laser speckle optics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)
  • Optical Communication System (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
  • Lubricants (AREA)
  • Steroid Compounds (AREA)
  • Lasers (AREA)
  • Semiconductor Lasers (AREA)
  • Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

A laser imaging system with reduced speckle is disclosed. The laser imaging system includes spatially superpositioned 1-D arrays or alternatively 2-D arrays of independent emitters of laser radiation, with each emitter having a spectral bandwidth Deltalambda<SUB>i </SUB>centered at some arbitrary wavelength lambda<SUB>0i</SUB>. The elements of the array are allowed, by design, to have a slightly different central wavelength, thereby creating an ensemble bandwidth DeltaLambda which is much greater than the bandwidth Deltalambda<SUB>i </SUB>of any individual emitter in the array. The resulting increased bandwidth reduces speckle in a displayed image.
AU2001271955A 2000-07-10 2001-07-10 Systems and methods for speckle reduction through bandwidth enhancement Abandoned AU2001271955A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US21713100P 2000-07-10 2000-07-10
US60217131 2000-07-10
PCT/US2001/021688 WO2002005038A2 (en) 2000-07-10 2001-07-10 Systems and methods for speckle reduction through bandwidth enhancement

Publications (1)

Publication Number Publication Date
AU2001271955A1 true AU2001271955A1 (en) 2002-01-21

Family

ID=22809779

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001271955A Abandoned AU2001271955A1 (en) 2000-07-10 2001-07-10 Systems and methods for speckle reduction through bandwidth enhancement

Country Status (8)

Country Link
US (1) US6975294B2 (en)
EP (1) EP1303796B1 (en)
JP (2) JP2004503923A (en)
AT (1) ATE294410T1 (en)
AU (1) AU2001271955A1 (en)
CA (1) CA2415142C (en)
DE (1) DE60110425T2 (en)
WO (1) WO2002005038A2 (en)

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ATE294410T1 (en) 2005-05-15
JP2004503923A (en) 2004-02-05
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WO2002005038A2 (en) 2002-01-17
DE60110425D1 (en) 2005-06-02
EP1303796B1 (en) 2005-04-27
JP2012230414A (en) 2012-11-22
US20020196414A1 (en) 2002-12-26
CA2415142A1 (en) 2002-01-17
EP1303796A2 (en) 2003-04-23
CA2415142C (en) 2012-03-20
DE60110425T2 (en) 2006-03-09
US6975294B2 (en) 2005-12-13

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