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1. (WO1987003383) CIRCUIT FOR ELECTRO-OPTIC MODULATORS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1987/003383 International Application No.: PCT/US1986/002394
Publication Date: 04.06.1987 International Filing Date: 10.11.1986
IPC:
G02F 1/055 (2006.01)
G PHYSICS
02
OPTICS
F
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1
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
01
for the control of the intensity, phase, polarisation or colour
03
based on ceramics or electro-optical crystals, e.g. exhibiting Pockels or Kerr effect
055
the active material being a ceramic
Applicants:
EASTMAN KODAK COMPANY [US/US]; 343 State Street Rochester, NY 14650, US
Inventors:
VERGONA, Albert, Bartholomew; US
Agent:
OWENS, Raymond, L.; 343 State Street Rochester, NY 14650, US
Priority Data:
802,10625.11.1985US
Title (EN) CIRCUIT FOR ELECTRO-OPTIC MODULATORS
(FR) CIRCUIT DE MODULATEURS ELECTRO-OPTIQUES
Abstract:
(EN) A circuit which responds to an input voltage signal for adjusting the voltage applied across electrodes (32A and 32B) of an electro-optic modulator (14). The circuit includes two FETs Q1 and Q2 connected in series. These FETs are operated as voltage controlled variable resistances. The electrodes are connected in parallel across one of these resistances. These resistances vary in response to the input voltage signal to change the voltage applied across the electrodes (32A and 32B). The circuit draws low current while providing sufficient bandwidth for exposing high quality images.
(FR) Circuit réagissant à un signal de tension d'entrée de manière à réguler la tension appliquée entre les électrodes (32A et 32B) d'un modulateur électro-optique (14). Le circuit comprend deux FETs Q1 et Q2 reliés en série. On fait travailler ces FETs comme des résistances variables commandées en tension. Les électrodes sont reliées en parallèle aux bornes de l'une de ces résistances. Ces dernières varient en réponse au signal de tension d'entrée de manière à modifier la tension appliquée entre les électrodes (32A et 32B). Le circuit consomme peu de courant tout en fournissant une largeur de bande suffisante pour l'exposition d'images de haute qualité.
Designated States: JP
European Patent Office (DE, FR, GB)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0247150