FR2310581A1 - Optical wave attenuator - comprising a lead lanthanum zirconate titanate wafer with attached electrodes, in a Kerr polarising cell - Google Patents

Optical wave attenuator - comprising a lead lanthanum zirconate titanate wafer with attached electrodes, in a Kerr polarising cell

Info

Publication number
FR2310581A1
FR2310581A1 FR7514329A FR7514329A FR2310581A1 FR 2310581 A1 FR2310581 A1 FR 2310581A1 FR 7514329 A FR7514329 A FR 7514329A FR 7514329 A FR7514329 A FR 7514329A FR 2310581 A1 FR2310581 A1 FR 2310581A1
Authority
FR
France
Prior art keywords
zirconate titanate
attenuator
polarising
kerr
lead lanthanum
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
FR7514329A
Other languages
French (fr)
Other versions
FR2310581B1 (en
Inventor
Jean-Pierre Herriau
Francois Micheron
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 FR7514329A priority Critical patent/FR2310581A1/en
Publication of FR2310581A1 publication Critical patent/FR2310581A1/en
Application granted granted Critical
Publication of FR2310581B1 publication Critical patent/FR2310581B1/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 
    • G02F1/03—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 ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
    • G02F1/05—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 ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect with ferro-electric properties
    • G02F1/0516—Operation of the cell; Circuit arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)

Abstract

The attenuator comprises two polarisers between which is located a lead lanthanum zirconate titanate wafer with attached electrodes so that an electric field can be applied perpendicular to the transmission direction of the attenuator and at 45 degrees to the polarisation direction of one of the polarisers. The novelty is that it includes appts. for measuring the value of flux transmitted by the attenuator, which provides a signal controlling the voltage applied to the electrodes so that the luminous flux transmitted remain constant. The device provides protection for the human eye or photo-sensitive appts. against excessive luminous flux without altering the images perceived. The wafer pref. has the formula (Pb0.91 La0.09)(Zr0.65 Ti0.35)O3.
FR7514329A 1975-05-07 1975-05-07 Optical wave attenuator - comprising a lead lanthanum zirconate titanate wafer with attached electrodes, in a Kerr polarising cell Granted FR2310581A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7514329A FR2310581A1 (en) 1975-05-07 1975-05-07 Optical wave attenuator - comprising a lead lanthanum zirconate titanate wafer with attached electrodes, in a Kerr polarising cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7514329A FR2310581A1 (en) 1975-05-07 1975-05-07 Optical wave attenuator - comprising a lead lanthanum zirconate titanate wafer with attached electrodes, in a Kerr polarising cell

Publications (2)

Publication Number Publication Date
FR2310581A1 true FR2310581A1 (en) 1976-12-03
FR2310581B1 FR2310581B1 (en) 1977-12-09

Family

ID=9154978

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7514329A Granted FR2310581A1 (en) 1975-05-07 1975-05-07 Optical wave attenuator - comprising a lead lanthanum zirconate titanate wafer with attached electrodes, in a Kerr polarising cell

Country Status (1)

Country Link
FR (1) FR2310581A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0824215A2 (en) * 1996-08-15 1998-02-18 Nikon Corporation Distance measuring apparatus employing a modulated light source and phase shift detection

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3579145A (en) * 1969-03-21 1971-05-18 Bell Telephone Labor Inc Modulator stabilization circuits

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3579145A (en) * 1969-03-21 1971-05-18 Bell Telephone Labor Inc Modulator stabilization circuits

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
*REVUE US JOURNAL OF THE AMERICAN CERAMIC SOCIETY, VOL. 54, NO. 1, JANVIER 1971, PAGES 1-11. ARTICLE DE G.H.HAERTLING ET AL "HOT-PRESSED PB,LA ZR,TI O3 FERROELECTRIC CERAMICS FOR ELECTROOPTIC APPLICATIONS" *
REVUE US IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS, VOL. AE-5, NO. 3, MAI 1969, PAGES 463-473. ARTICLE DE R.P.RUGER "AN ELECTROOPTICAL AUTOMATIC GAIN CONTROL" *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0824215A2 (en) * 1996-08-15 1998-02-18 Nikon Corporation Distance measuring apparatus employing a modulated light source and phase shift detection
EP0824215A3 (en) * 1996-08-15 1998-07-22 Nikon Corporation Distance measuring apparatus employing a modulated light source and phase shift detection

Also Published As

Publication number Publication date
FR2310581B1 (en) 1977-12-09

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Legal Events

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ST Notification of lapse