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1. (WO1997015859) ELECTRONIC CONTROL SYSTEM FOR AN OPTICAL ASSEMBLY
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/015859 International Application No.: PCT/US1996/017171
Publication Date: 01.05.1997 International Filing Date: 22.10.1996
IPC:
G02F 1/01 (2006.01) ,G02F 1/11 (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
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
11
based on acousto-optical elements, e.g. using variable diffraction by sound or like mechanical waves
Applicants:
HINDS INSTRUMENTS, INC. [US/US]; 3175 N.W. Aloclek Drive Hillsboro, OR 97124-7135, US
Inventors:
VARNUM, Steven, Scott; US
Agent:
HUGHEY, Patrick, W.; Klarquist, Sparkman, Campbell, Leigh & Whinston One World Trade Center Suite 1600 121 S.W. Salmon Street Portland, OR 97204, US
Priority Data:
08/548,50225.10.1995US
Title (EN) ELECTRONIC CONTROL SYSTEM FOR AN OPTICAL ASSEMBLY
(FR) SYSTEME DE COMMANDE ELECTRONIQUE POUR UN ENSEMBLE OPTIQUE
Abstract:
(EN) An electronic control system that accurately maintains oscillation of an optical assembly at resonance. In the preferred embodiment, a signal control circuit delivers an input signal to an optical assembly. A resonance detector detects the difference in phase between the input signal and a feedback signal from the optical assembly. The phase difference is used to determine whether the optical assembly is at resonance. The signal control circuit is responsive to the resonance detector and modifies the frequency of the input signal to oscillate the optical assembly at its resonant frequency. The electronic control system can also maintain multiple optical assemblies at resonance.
(FR) L'invention concerne un système de commande électronique qui maintient avec précision l'oscillation d'un ensemble optique en résonance. Dans un mode de réalisation préféré, un circuit de commande de signaux fournit un signal d'entrée à un ensemble optique. Un détecteur de résonance détecte la différence de phase entre le signal d'entrée et un signal de rétroaction provenant de l'ensemble optique. La différence de phase est utilisée pour déterminer si l'ensemble optique est en résonance. Le circuit de commande des signaux est sensible au détecteur de résonance et modifie la fréquence du signal d'entrée pour que l'ensemble optique oscille à sa fréquence de résonance. Ce système de commande électronique peut également maintenir une pluralité d'ensembles optiques en résonance.
Designated States: JP
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0815486