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FR2349122A1 - SYSTEM ALLOWING TO ALTER THE QUALITY OF OPTICAL IMAGES AND TO SIMULATE ATMOSPHERIC PHENOMENA REDUCING VISIBILITY - Google Patents

SYSTEM ALLOWING TO ALTER THE QUALITY OF OPTICAL IMAGES AND TO SIMULATE ATMOSPHERIC PHENOMENA REDUCING VISIBILITY

Info

Publication number
FR2349122A1
FR2349122A1 FR7612044A FR7612044A FR2349122A1 FR 2349122 A1 FR2349122 A1 FR 2349122A1 FR 7612044 A FR7612044 A FR 7612044A FR 7612044 A FR7612044 A FR 7612044A FR 2349122 A1 FR2349122 A1 FR 2349122A1
Authority
FR
France
Prior art keywords
alter
quality
reducing visibility
optical images
system allowing
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.)
Granted
Application number
FR7612044A
Other languages
French (fr)
Other versions
FR2349122B1 (en
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
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Priority to FR7612044A priority Critical patent/FR2349122A1/en
Publication of FR2349122A1 publication Critical patent/FR2349122A1/en
Application granted granted Critical
Publication of FR2349122B1 publication Critical patent/FR2349122B1/fr
Granted 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
    • G02F1/1313—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G3/00—Aiming or laying means
    • F41G3/26—Teaching or practice apparatus for gun-aiming or gun-laying
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B9/00—Simulators for teaching or training purposes
    • G09B9/02—Simulators for teaching or training purposes for teaching control of vehicles or other craft
    • G09B9/08—Simulators for teaching or training purposes for teaching control of vehicles or other craft for teaching control of aircraft, e.g. Link trainer
    • G09B9/30—Simulation of view from aircraft
    • G09B9/32—Simulation of view from aircraft by projected image
    • G09B9/326—Simulation of view from aircraft by projected image the image being transformed by optical means

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Educational Technology (AREA)
  • Educational Administration (AREA)
  • Business, Economics & Management (AREA)
  • Radar, Positioning & Navigation (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Optics & Photonics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

A weapon training system uses a mist or smoke simulator device to have the effect of reducing visibility in the line of vision. The observer (E) looks through the end of an optical fibre bundle (F) towards a screen carrying an image (I) representing e.g. a scenic background. This is interrupted by a liquid crystal arrangement (C) which provides the smoke effect. The liquid crystal units has electrodes which are connected momentarily to an alternating voltage which produces the required effect. The frequency of the alternating voltage is selected to suit the crystals, and this voltage is modulated by one or two superimposed signals. The first signal can be modulated by a trapezoidal signal.
FR7612044A 1976-04-23 1976-04-23 SYSTEM ALLOWING TO ALTER THE QUALITY OF OPTICAL IMAGES AND TO SIMULATE ATMOSPHERIC PHENOMENA REDUCING VISIBILITY Granted FR2349122A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7612044A FR2349122A1 (en) 1976-04-23 1976-04-23 SYSTEM ALLOWING TO ALTER THE QUALITY OF OPTICAL IMAGES AND TO SIMULATE ATMOSPHERIC PHENOMENA REDUCING VISIBILITY

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7612044A FR2349122A1 (en) 1976-04-23 1976-04-23 SYSTEM ALLOWING TO ALTER THE QUALITY OF OPTICAL IMAGES AND TO SIMULATE ATMOSPHERIC PHENOMENA REDUCING VISIBILITY

Publications (2)

Publication Number Publication Date
FR2349122A1 true FR2349122A1 (en) 1977-11-18
FR2349122B1 FR2349122B1 (en) 1980-01-04

Family

ID=9172229

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7612044A Granted FR2349122A1 (en) 1976-04-23 1976-04-23 SYSTEM ALLOWING TO ALTER THE QUALITY OF OPTICAL IMAGES AND TO SIMULATE ATMOSPHERIC PHENOMENA REDUCING VISIBILITY

Country Status (1)

Country Link
FR (1) FR2349122A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991018359A1 (en) * 1990-05-12 1991-11-28 Rediffusion Simulation Limited Image generator
EP0488994A3 (en) * 1985-08-05 1992-07-01 Biotrack, Inc. Capillary flow device
US10209532B2 (en) 2014-03-31 2019-02-19 Jonathan MacDonald PARKER Switchable facemask for simulating smoke

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942270A (en) * 1974-08-05 1976-03-09 The Singer Company Simulation of visual blackout due to aircraft maneuvering

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942270A (en) * 1974-08-05 1976-03-09 The Singer Company Simulation of visual blackout due to aircraft maneuvering

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0488994A3 (en) * 1985-08-05 1992-07-01 Biotrack, Inc. Capillary flow device
WO1991018359A1 (en) * 1990-05-12 1991-11-28 Rediffusion Simulation Limited Image generator
US10209532B2 (en) 2014-03-31 2019-02-19 Jonathan MacDonald PARKER Switchable facemask for simulating smoke

Also Published As

Publication number Publication date
FR2349122B1 (en) 1980-01-04

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Legal Events

Date Code Title Description
ST Notification of lapse