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GB1432558A - Graticule - Google Patents

Graticule

Info

Publication number
GB1432558A
GB1432558A GB4389472A GB4389472A GB1432558A GB 1432558 A GB1432558 A GB 1432558A GB 4389472 A GB4389472 A GB 4389472A GB 4389472 A GB4389472 A GB 4389472A GB 1432558 A GB1432558 A GB 1432558A
Authority
GB
United Kingdom
Prior art keywords
cross
graticule
array
liquid crystal
electrodes
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
GB4389472A
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.)
SECR DEFENCE
UK Secretary of State for Defence
Original Assignee
SECR DEFENCE
UK Secretary of State for Defence
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 SECR DEFENCE, UK Secretary of State for Defence filed Critical SECR DEFENCE
Priority to GB4389472A priority Critical patent/GB1432558A/en
Publication of GB1432558A publication Critical patent/GB1432558A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G02B27/32—Fiducial marks and measuring scales within the optical system
    • 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
    • G02F1/1313—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 specially adapted for a particular application

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

1432558 Controlling light DEFENCE SECRETARY OF STATE FOR 17 Oct 1973 [22 Sept 1972] 43894/72 Heading H4F A graticule in an optical system comprises a liquid crystal film between two parallel transparent plates each supporting an array of parallel electrodes, the arrays being inclined to each other. A cross is displayed when potential is applied to an electrode in each array. When the potential applied to both electrodes is of the same polarity the centre point remains clear. The graticule may be mounted in the image plane of the system or the cross is projected into this plane by a half silvered mirror. In the latter case the cross should be clear against a dark background, this is achieved using polarizing plates on either side of a liquid crystal which exhibits twisted nematic scattering. The display is erased by a h.f. signal.
GB4389472A 1972-09-22 1972-09-22 Graticule Expired GB1432558A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4389472A GB1432558A (en) 1972-09-22 1972-09-22 Graticule

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4389472A GB1432558A (en) 1972-09-22 1972-09-22 Graticule

Publications (1)

Publication Number Publication Date
GB1432558A true GB1432558A (en) 1976-04-22

Family

ID=10430807

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4389472A Expired GB1432558A (en) 1972-09-22 1972-09-22 Graticule

Country Status (1)

Country Link
GB (1) GB1432558A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2722018A1 (en) * 1977-05-14 1978-11-16 Eltro Gmbh LIQUID CRYSTAL MATRIX
DE3219940A1 (en) * 1982-05-27 1983-12-01 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Sighting device
EP0357845A1 (en) * 1987-04-29 1990-03-14 Varo, Inc. Solid state reticle projector for a weapon sight
FR2656078A1 (en) * 1989-12-20 1991-06-21 France Etat Armement Sight (aiming) telescope for combat vehicle
EP0551032A1 (en) * 1992-01-10 1993-07-14 ESSILOR INTERNATIONAL, Compagnie Générale d'Optique Electronic reticle, method for achieving higher precision during the use of an electronic reticle, and its application
WO2018091803A1 (en) * 2016-11-21 2018-05-24 Psa Automoliles Sa Lighting device comprising a screen with regions having different light transmission coefficients
US11578944B2 (en) 2017-08-23 2023-02-14 Lumineq Oy Sight display device and method for manufacturing sight display device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2722018A1 (en) * 1977-05-14 1978-11-16 Eltro Gmbh LIQUID CRYSTAL MATRIX
DE3219940A1 (en) * 1982-05-27 1983-12-01 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Sighting device
EP0357845A1 (en) * 1987-04-29 1990-03-14 Varo, Inc. Solid state reticle projector for a weapon sight
FR2656078A1 (en) * 1989-12-20 1991-06-21 France Etat Armement Sight (aiming) telescope for combat vehicle
EP0551032A1 (en) * 1992-01-10 1993-07-14 ESSILOR INTERNATIONAL, Compagnie Générale d'Optique Electronic reticle, method for achieving higher precision during the use of an electronic reticle, and its application
FR2686161A1 (en) * 1992-01-10 1993-07-16 Essilor Int ELECTRONIC RETICLE, METHOD OF OBTAINING IMPROVED PRECISION WHEN USING AN ELECTRONIC RETICLE, AND ITS APPLICATION
WO2018091803A1 (en) * 2016-11-21 2018-05-24 Psa Automoliles Sa Lighting device comprising a screen with regions having different light transmission coefficients
FR3059082A1 (en) * 2016-11-21 2018-05-25 Peugeot Citroen Automobiles Sa ZONED SCREEN LIGHTING DEVICE HAVING DIFFERENT LIGHT TRANSMISSION COEFFICIENTS
US11578944B2 (en) 2017-08-23 2023-02-14 Lumineq Oy Sight display device and method for manufacturing sight display device

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Legal Events

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