← Back to Patent Explorer
EP0021967A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Electro-optic device with electric birefringence comprising a polarized polymer

Assignee: Thales SA
•
Filing: 1980-06-13
•
Granted: —
•
Expires: 2000-06-13
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract 1. An electrically controlled electro-optical device for modifying by electrical double refraction the polarisation properties of an incident optical radiation, said device comprising a body (6) effecting the transmission of said radiation, and control electrodes (13, 14) adapted to create within said body an electrical field (E) the intensity of which varies with the applied control voltage, characterized in that said body exhibits macroscopically the electro-optical properties related to a non-centrosymmetrical crystallographic class, and is constituted by a polymer or a copolymer, that zone of said body through which passes said radiation having acquired said properties due to a dipole moment previously induced by an electric polarization field.

Inventors

  • 👤 Dominique Broussoux
  • 👤 François Micheron

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 20:29
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/061; G02F1/065

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

References Cited (Backward Citations)

US3711180A Cited
US3839067A Cited
US4004849A Cited

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag