GB441274A - Improvements in or relating to light valves - Google Patents

Improvements in or relating to light valves

Info

Publication number
GB441274A
GB441274A GB2062134A GB2062134A GB441274A GB 441274 A GB441274 A GB 441274A GB 2062134 A GB2062134 A GB 2062134A GB 2062134 A GB2062134 A GB 2062134A GB 441274 A GB441274 A GB 441274A
Authority
GB
United Kingdom
Prior art keywords
methyl
cinnamate
alpha
ethoxybenzalamino
anisalamino
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
GB2062134A
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co Ltd
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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Priority to GB2062134A priority Critical patent/GB441274A/en
Publication of GB441274A publication Critical patent/GB441274A/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 
    • G02F1/07—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 electro-optical liquids exhibiting Kerr effect
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)

Abstract

441,274. Electro-optical light valves. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, LEVIN, B., 104, Leighton Gardens, Kensal Rise, and LEVIN, N., 15, Kyverdale Road, Stamford Hill, all in London. July 13, 1934, Nos. 20621 and 22721. [Class 40 (iii)] The bi-refringent material in a Kerr cell is in a state intermediate between liquid and solid. When the material must be maintained above normal temperature to be in the nematic phase, the electrodes 1, 2 of the valve are heated by a thermostatically controlled electric heating wire 6. The valve is enclosed in a lagged chamber. Suitable materials are ethylanisalamino - cinnamate, methyl - p - - ethoxybenzalamino - alpha - methyl - cinnamate, ethyl - p - ethoxybenzalamino - alpha - methyl - cinnamate, methyl - anisalamino - alpha - methyl - cinnamate, ethyl - anisalamino - alpha - methyl - cinnamate, or the like. The material may be an aqueous solution of a substance, which is then in a mesomorphic state, and in such concentration as to be in the nematic phase at atmospheric temperatures. Such substances are 9-bromophenanthrene - 3(or 6) - sulphonic acid, m<1>-nitrobenzoyl - m - aminobenzoyl - 2 - naphthylamine - 4.8-disulphonic acid, the disodium salt of m<1> - nitrobenzoyl - m - aminobenzoyl - 2 - naphthylamine - 6 . 8 - disulphonic acid.
GB2062134A 1934-07-13 1934-07-13 Improvements in or relating to light valves Expired GB441274A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2062134A GB441274A (en) 1934-07-13 1934-07-13 Improvements in or relating to light valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2062134A GB441274A (en) 1934-07-13 1934-07-13 Improvements in or relating to light valves

Publications (1)

Publication Number Publication Date
GB441274A true GB441274A (en) 1936-01-13

Family

ID=10148952

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2062134A Expired GB441274A (en) 1934-07-13 1934-07-13 Improvements in or relating to light valves

Country Status (1)

Country Link
GB (1) GB441274A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3322485A (en) * 1962-11-09 1967-05-30 Rca Corp Electro-optical elements utilizing an organic nematic compound
US3592526A (en) * 1969-07-15 1971-07-13 John F Dreyer Means for rotating the polarization plane of light and for converting polarized light to nonpolarized light

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3322485A (en) * 1962-11-09 1967-05-30 Rca Corp Electro-optical elements utilizing an organic nematic compound
US3592526A (en) * 1969-07-15 1971-07-13 John F Dreyer Means for rotating the polarization plane of light and for converting polarized light to nonpolarized light

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