GB1396828A - Electrooptical modulations employing chromatic polarization - Google Patents

Electrooptical modulations employing chromatic polarization

Info

Publication number
GB1396828A
GB1396828A GB1830673A GB1830673A GB1396828A GB 1396828 A GB1396828 A GB 1396828A GB 1830673 A GB1830673 A GB 1830673A GB 1830673 A GB1830673 A GB 1830673A GB 1396828 A GB1396828 A GB 1396828A
Authority
GB
United Kingdom
Prior art keywords
film
nematic
alignment
birefringence
april
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.)
Expired
Application number
GB1830673A
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Publication of GB1396828A publication Critical patent/GB1396828A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G02F1/01—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 intensity, phase, polarisation or colour 
    • G02F1/13—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 intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—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 intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/139—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 intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
    • G02F1/1393—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 intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the birefringence of the liquid crystal being electrically controlled, e.g. ECB-, DAP-, HAN-, PI-LC cells
    • 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
    • G02F1/01—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 intensity, phase, polarisation or colour 
    • G02F1/13—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 intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • 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
    • G02F1/01—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 intensity, phase, polarisation or colour 
    • G02F1/13—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 intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G02F1/133638—Waveplates, i.e. plates with a retardation value of lambda/n
    • 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
    • G02F2413/00—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
    • G02F2413/02—Number of plates being 2
    • 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
    • G02F2413/00—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
    • G02F2413/08—Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates with a particular optical axis orientation

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Liquid Crystal (AREA)

Abstract

1396828 Modulating light THOMSON-CSF 16 April 1973 [17 April 1972] 18306/73 Addition to 1364274 Heading H4F When an electric field is applied across the thickness of a perpendicularly aligned nematic liquid crystal film, to alter the direction of molecular alignment and the birefringence of the film, the uniform alignment may be lost and a plurality of differently aligned domains produced, each having the same degree of birefringence but different principal directions. Such a film would not be suitable for placing between crossed polarizers for modulating the intensity of monochromatic light or the colour of polychromatic light. In a first method of overcoming such difficulty, #/4 plates or the equivalent thereof are placed between each polarizer and the nematic film and may form the plates bounding the nematic film. In a second method a further continuous constraint is applied to the nematic material to ensure that the alignment remains uniform as the molecular orientation alters. The surfaces of the film may be in contact with surfaces which have been uniformly scratched by rubbing, to an extent insufficient however to influence the initial molecular orientation. Alternatively a magnetic or electric field is imposed parallel with the plane of the film.
GB1830673A 1972-04-17 1973-04-16 Electrooptical modulations employing chromatic polarization Expired GB1396828A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7213439A FR2180448B2 (en) 1972-04-17 1972-04-17

Publications (1)

Publication Number Publication Date
GB1396828A true GB1396828A (en) 1975-06-04

Family

ID=9096980

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1830673A Expired GB1396828A (en) 1972-04-17 1973-04-16 Electrooptical modulations employing chromatic polarization

Country Status (4)

Country Link
JP (2) JPS4921167A (en)
DE (1) DE2319442A1 (en)
FR (1) FR2180448B2 (en)
GB (1) GB1396828A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4364639A (en) * 1980-08-25 1982-12-21 Northern Telecom Limited Variable attenuation electro-optic device
US4674841A (en) * 1985-03-08 1987-06-23 Tektronix, Inc. Color filter switchable among three state via a variable retarder
US4852976A (en) * 1985-02-15 1989-08-01 Citizen Watch Co., Ltd. Liquid crystal display device
GB2173605B (en) * 1985-02-21 1989-09-20 Canon Kk Diffractive light modulating devices
US5583678A (en) * 1993-03-12 1996-12-10 Casio Computer Co., Ltd. Color liquid crystal display apparatus
US6819379B2 (en) 1997-12-26 2004-11-16 Sharp Kabushiki Kaisha Liquid crystal display device with light transmission and reflection regions

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50142193A (en) * 1974-05-02 1975-11-15
JPS5166628A (en) * 1974-12-03 1976-06-09 Kyozo Okabe Jidoshano kuratsuchisochi
JPS5251631A (en) * 1975-10-22 1977-04-25 Nissan Motor Co Ltd Hydraulic control device for transmission of industrial vehicle
JPS6020102Y2 (en) * 1977-05-12 1985-06-17 三菱電機株式会社 electro-optical device
US4231068A (en) * 1977-06-15 1980-10-28 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Optical screens
JPS601303Y2 (en) * 1978-03-29 1985-01-16 自動車機器株式会社 Air servo device for clutch control
GB2028527B (en) * 1978-06-08 1982-11-24 American Liquid Xtal Chem Liquid crystal displays
JPS5692518A (en) * 1979-12-26 1981-07-27 Sharp Corp Liquid crystal display device
JPS58192017A (en) * 1982-05-06 1983-11-09 Nippon Telegr & Teleph Corp <Ntt> Optical switch
JPS602047U (en) * 1983-06-17 1985-01-09 株式会社神崎高級工機製作所 Marine propulsion system
FR2564605B1 (en) * 1984-05-18 1987-12-24 Commissariat Energie Atomique LIQUID CRYSTAL CELL CAPABLE OF PRESENTING A HOMEOTROPIC STRUCTURE, WITH BIREFRINGENCE COMPENSATED FOR THIS STRUCTURE
FR2595156B1 (en) * 1986-02-28 1988-04-29 Commissariat Energie Atomique LIQUID CRYSTAL CELL USING ELECTRICALLY CONTROLLED BIREFRINGENCE EFFECT AND METHODS OF MANUFACTURING THE CELL AND A UNIAXIC NEGATIVE ANISOTROPY ANISOTROPY MEDIUM FOR USE THEREIN
US4726663A (en) * 1986-11-14 1988-02-23 Tektronix, Inc. Switchable color filter with enhanced transmissivity
JPH01207716A (en) * 1988-02-16 1989-08-21 Seiko Instr & Electron Ltd Device for projecting polarized image
JPH03132624A (en) * 1989-10-18 1991-06-06 Stanley Electric Co Ltd Liquid crystal display element
WO2000025176A1 (en) 1998-10-28 2000-05-04 Dai Nippon Printing Co., Ltd. Liquid crystal display
KR100379287B1 (en) * 1999-06-25 2003-04-10 닛뽄덴끼 가부시끼가이샤 Multi domain LCD device
JP4882140B2 (en) * 1999-06-25 2012-02-22 日本電気株式会社 Multi-domain liquid crystal display device
JP2002040428A (en) * 1999-09-28 2002-02-06 Stanley Electric Co Ltd Liquid crystal display device
JP4665138B2 (en) * 2000-02-10 2011-04-06 スタンレー電気株式会社 Liquid crystal display device
JP2001318371A (en) * 2000-05-08 2001-11-16 Toshiba Corp Liquid crystal display device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3503670A (en) * 1967-01-16 1970-03-31 Ibm Multifrequency light processor and digital deflector

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4364639A (en) * 1980-08-25 1982-12-21 Northern Telecom Limited Variable attenuation electro-optic device
US4852976A (en) * 1985-02-15 1989-08-01 Citizen Watch Co., Ltd. Liquid crystal display device
GB2173605B (en) * 1985-02-21 1989-09-20 Canon Kk Diffractive light modulating devices
US5013141A (en) * 1985-02-21 1991-05-07 Canon Kabushiki Kaisha Liquid crystal light modulation device
US4674841A (en) * 1985-03-08 1987-06-23 Tektronix, Inc. Color filter switchable among three state via a variable retarder
US5583678A (en) * 1993-03-12 1996-12-10 Casio Computer Co., Ltd. Color liquid crystal display apparatus
US6819379B2 (en) 1997-12-26 2004-11-16 Sharp Kabushiki Kaisha Liquid crystal display device with light transmission and reflection regions
US7663717B2 (en) 1997-12-26 2010-02-16 Sharp Kabushiki Kaisha Liquid crystal display device
US7952667B2 (en) 1997-12-26 2011-05-31 Sharp Kabushiki Kaisha Liquid crystal display device
US8054423B2 (en) 1997-12-26 2011-11-08 Sharp Kabushiki Kaisha Liquid crystal display device

Also Published As

Publication number Publication date
FR2180448B2 (en) 1974-12-20
JPS5562430A (en) 1980-05-10
JPS4921167A (en) 1974-02-25
DE2319442A1 (en) 1973-10-31
FR2180448A2 (en) 1973-11-30

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee