SYSTEM AND METHOD FOR VIBRATING SCREENS TO REDUCE SPECKLE

The present disclosure includes systems and methods for solving speckle problems by exciting the screen with a more complex vibration spectrum. A range of frequencies provides, in effect, a collection of overlapping patterns of high and low displacement, so that all regions of the screen have enough...

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Hauptverfasser: CURTIS, KEVIN R, MCKNIGHT, DOUGLAS J
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MCKNIGHT, DOUGLAS J
description The present disclosure includes systems and methods for solving speckle problems by exciting the screen with a more complex vibration spectrum. A range of frequencies provides, in effect, a collection of overlapping patterns of high and low displacement, so that all regions of the screen have enough motion to reduce visible speckle. As previously discussed acceptable speckle may be approximately 15% contrast or less, preferably approximately 5% contrast or less at approximately 15 feet from the screen. La présente invention concerne des systèmes et des procédés pour résoudre des problèmes de chatoiement par excitation de l'écran avec un spectre de vibrations plus complexe. Une plage de fréquences fournit, en effet, une collection de modèles de déplacement haut et bas se chevauchant, de telle sorte que toutes les régions de l'écran ont suffisamment de mouvement pour réduire le chatoiement visible. Tel que discuté précédemment, un chatoiement acceptable peut avoir un contraste d'environ 15 % ou moins, de préférence un contraste d'environ 5 % ou moins à environ 15 pieds de l'écran.
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subjects ACCESSORIES THEREFOR
APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM
CINEMATOGRAPHY
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
ELECTROGRAPHY
HOLOGRAPHY
PHOTOGRAPHY
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
title SYSTEM AND METHOD FOR VIBRATING SCREENS TO REDUCE SPECKLE
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