FR2699694B1 - Retroreflective device and identification system. - Google Patents

Retroreflective device and identification system.

Info

Publication number
FR2699694B1
FR2699694B1 FR9215384A FR9215384A FR2699694B1 FR 2699694 B1 FR2699694 B1 FR 2699694B1 FR 9215384 A FR9215384 A FR 9215384A FR 9215384 A FR9215384 A FR 9215384A FR 2699694 B1 FR2699694 B1 FR 2699694B1
Authority
FR
France
Prior art keywords
identification system
retroreflective device
retroreflective
identification
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 - Fee Related
Application number
FR9215384A
Other languages
French (fr)
Other versions
FR2699694A1 (en
Inventor
Philippe Robin
Jean-Pierre Huignard
Henri Rajbenbach
Pierre Le Barny
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
Priority to FR9215384A priority Critical patent/FR2699694B1/en
Publication of FR2699694A1 publication Critical patent/FR2699694A1/en
Application granted granted Critical
Publication of FR2699694B1 publication Critical patent/FR2699694B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/74—Systems using reradiation of electromagnetic waves other than radio waves, e.g. IFF, i.e. identification of friend or foe
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0284—Diffusing elements; Afocal elements characterized by the use used in reflection
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G02B5/126—Reflex reflectors including curved refracting surface
    • G02B5/128—Reflex reflectors including curved refracting surface transparent spheres being embedded in matrix
    • 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
    • G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Dispersion Chemistry (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Remote Sensing (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Liquid Crystal (AREA)
FR9215384A 1992-12-21 1992-12-21 Retroreflective device and identification system. Expired - Fee Related FR2699694B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9215384A FR2699694B1 (en) 1992-12-21 1992-12-21 Retroreflective device and identification system.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9215384A FR2699694B1 (en) 1992-12-21 1992-12-21 Retroreflective device and identification system.

Publications (2)

Publication Number Publication Date
FR2699694A1 FR2699694A1 (en) 1994-06-24
FR2699694B1 true FR2699694B1 (en) 1995-01-20

Family

ID=9436843

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9215384A Expired - Fee Related FR2699694B1 (en) 1992-12-21 1992-12-21 Retroreflective device and identification system.

Country Status (1)

Country Link
FR (1) FR2699694B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2157446A1 (en) * 2008-08-18 2010-02-24 Cedes AG Sensor device and use of a sensor device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2500933A1 (en) * 1981-02-27 1982-09-03 Thomson Csf Catadioptric stark effect laser modulator for IFF interrogator - uses corner cube catadioptres and two sets of orthogonal plane mirrors forming rectangular section waveguide
DE3321790A1 (en) * 1983-06-16 1985-01-03 Bergwerksverband Gmbh, 4300 Essen Protective radio unit
DD252449A1 (en) * 1986-09-04 1987-12-16 Werk Fernsehelektronik Veb METHOD FOR ORIENTATION OF LIQUID CRYSTALS
LU86880A1 (en) * 1987-05-14 1989-01-19 Glaverbel GLASS MICROBALLS INTENDED TO BE IN CONTACT WITH POLYMERIZABLE MATERIALS; PROCESS FOR TREATING GLASS MICROBALLS TO MAKE THEM SUITABLE FOR USE AND POLYMERIZATION METHOD USING SUCH MICROBILLES
US4983021A (en) * 1988-08-10 1991-01-08 Fergason James L Modulated retroreflector system

Also Published As

Publication number Publication date
FR2699694A1 (en) 1994-06-24

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Legal Events

Date Code Title Description
ST Notification of lapse