WO2007054908A3 - Method and system for shifting at least one light spot with a phase-modulator - Google Patents

Method and system for shifting at least one light spot with a phase-modulator Download PDF

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Publication number
WO2007054908A3
WO2007054908A3 PCT/IB2006/054185 IB2006054185W WO2007054908A3 WO 2007054908 A3 WO2007054908 A3 WO 2007054908A3 IB 2006054185 W IB2006054185 W IB 2006054185W WO 2007054908 A3 WO2007054908 A3 WO 2007054908A3
Authority
WO
WIPO (PCT)
Prior art keywords
shifting
light spot
electrodes
phase
modulator
Prior art date
Application number
PCT/IB2006/054185
Other languages
French (fr)
Other versions
WO2007054908A2 (en
Inventor
Robert Frans Maria Hendriks
Gerardus Petrus Karman
Sjoerd Stallinga
Original Assignee
Koninkl Philips Electronics Nv
Robert Frans Maria Hendriks
Gerardus Petrus Karman
Sjoerd Stallinga
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 Koninkl Philips Electronics Nv, Robert Frans Maria Hendriks, Gerardus Petrus Karman, Sjoerd Stallinga filed Critical Koninkl Philips Electronics Nv
Publication of WO2007054908A2 publication Critical patent/WO2007054908A2/en
Publication of WO2007054908A3 publication Critical patent/WO2007054908A3/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08547—Arrangements for positioning the light beam only without moving the head, e.g. using static electro-optical elements
    • G11B7/08552—Arrangements for positioning the light beam only without moving the head, e.g. using static electro-optical elements using electro-optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
    • G02F1/291—Two-dimensional analogue deflection
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
    • G02F1/292—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection by controlled diffraction or phased-array beam steering

Abstract

A system for shifting at least one light spot (103) relative to an information carrier (101) during data read - out. The system comprises a phase-modulator (706) comprising a layer of liquid crystal sandwiched between upper and lower substrates. A first set of electrodes (903a) is provided on the upper substrate, arranged in a first lateral shifting direction (x) and a second set of electrodes (903b) is provided on the lower substrate, arranged in a second lateral shifting direction, orthogonal to the first. A first voltage gradient is applied across the first set of electrodes (903a) and a second voltage gradient is applied across a second set of electrodes (903b) so as to generate first and second respective phase profiles for shifting the at least one light spot (103) in the respective first direction (x) and second direction (y) .
PCT/IB2006/054185 2005-11-14 2006-11-10 Method and system for shifting at least one light spot with a phase-modulator WO2007054908A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200510124720 2005-11-14
CN200510124720.X 2005-11-14

Publications (2)

Publication Number Publication Date
WO2007054908A2 WO2007054908A2 (en) 2007-05-18
WO2007054908A3 true WO2007054908A3 (en) 2007-07-26

Family

ID=37905142

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2006/054185 WO2007054908A2 (en) 2005-11-14 2006-11-10 Method and system for shifting at least one light spot with a phase-modulator

Country Status (2)

Country Link
TW (1) TW200822099A (en)
WO (1) WO2007054908A2 (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0352302A1 (en) * 1987-08-19 1990-01-31 Hughes Aircraft Company Phase controlled light deflector
US5126869A (en) * 1990-12-03 1992-06-30 Raytheon Company Two-dimensional, phased-array optical beam steerer
EP0501825A2 (en) * 1991-02-28 1992-09-02 Raytheon Company Method for providing beam steering in a subaperture-addressed optical bean steerer
US5943159A (en) * 1996-05-14 1999-08-24 Zhu; Tom Yuxin Method and apparatus for optical beam steering
WO2002029774A2 (en) * 2000-09-29 2002-04-11 Innovative Technology Licensing, Llc Frequency modulated liquid crystal beamsteering device
US6469822B1 (en) * 1997-11-05 2002-10-22 Yuxin Zhu Optical phased array device and the method therefor
US6643054B1 (en) * 2001-01-22 2003-11-04 Carl-Zeiss-Stiftung Beam deflector, switching system comprising beam deflectors as well as method for selectively coupling terminals for optical signals
WO2005027101A2 (en) * 2003-09-18 2005-03-24 Koninklijke Philips Electronics N.V. System for shifting at least one light spot.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0352302A1 (en) * 1987-08-19 1990-01-31 Hughes Aircraft Company Phase controlled light deflector
US5126869A (en) * 1990-12-03 1992-06-30 Raytheon Company Two-dimensional, phased-array optical beam steerer
EP0501825A2 (en) * 1991-02-28 1992-09-02 Raytheon Company Method for providing beam steering in a subaperture-addressed optical bean steerer
US5943159A (en) * 1996-05-14 1999-08-24 Zhu; Tom Yuxin Method and apparatus for optical beam steering
US6469822B1 (en) * 1997-11-05 2002-10-22 Yuxin Zhu Optical phased array device and the method therefor
WO2002029774A2 (en) * 2000-09-29 2002-04-11 Innovative Technology Licensing, Llc Frequency modulated liquid crystal beamsteering device
US6643054B1 (en) * 2001-01-22 2003-11-04 Carl-Zeiss-Stiftung Beam deflector, switching system comprising beam deflectors as well as method for selectively coupling terminals for optical signals
WO2005027101A2 (en) * 2003-09-18 2005-03-24 Koninklijke Philips Electronics N.V. System for shifting at least one light spot.

Also Published As

Publication number Publication date
WO2007054908A2 (en) 2007-05-18
TW200822099A (en) 2008-05-16

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