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WO1998014805B1 - Appareil et procede de generation d'element diffractif a l'aide d'un affichage a cristaux liquides - Google Patents

Appareil et procede de generation d'element diffractif a l'aide d'un affichage a cristaux liquides

Info

Publication number
WO1998014805B1
WO1998014805B1 PCT/US1997/017850 US9717850W WO9814805B1 WO 1998014805 B1 WO1998014805 B1 WO 1998014805B1 US 9717850 W US9717850 W US 9717850W WO 9814805 B1 WO9814805 B1 WO 9814805B1
Authority
WO
WIPO (PCT)
Prior art keywords
radiation
optical
receiving
display
data
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.)
Ceased
Application number
PCT/US1997/017850
Other languages
English (en)
Other versions
WO1998014805A1 (fr
Filing date
Publication date
Priority claimed from US08/738,767 external-priority patent/US5986781A/en
Application filed filed Critical
Priority to CA002267316A priority Critical patent/CA2267316C/fr
Priority to EP97945468A priority patent/EP0934540B1/fr
Priority to DE69732042T priority patent/DE69732042T2/de
Priority to AT97945468T priority patent/ATE285589T1/de
Publication of WO1998014805A1 publication Critical patent/WO1998014805A1/fr
Publication of WO1998014805B1 publication Critical patent/WO1998014805B1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Abstract

On décrit un dispositif, un procédé et un système d'enregistrement d'informations diffractives graphiques d'image à haute résolution qui sont particulièrement adaptées à l'enregistrement d'informations qui seraient difficiles à reproduire à l'aide des procédés de contrefaçon classiques. Dans une forme de réalisation, de la lumière est sélectivement envoyée à travers un obturateur (52) puis un filtre spatial (54) épure le faisceau pour éliminer les composantes de fréquence indésirables. Un affichage à cristaux liquides (ACC) (68) reçoit de manière dynamique un flux de données en provenance d'un ordinateur (20) dans lequel chacune des valeurs de données affichées présente une caractéristique optique (par exemple la densité, la phase ou la polarisation) par rapport en faisceau filtré et provoque la diffraction en une pluralité de faisceaux diffractés (59). Un masque (76) ne fait passer sélectivement que les faisceaux prédéterminés pour que seules les composantes de fréquence capables de générer les franges d'interférence optique désirées soient autorisées à passer. Des composantes optiques supplémentaires (78) reçoivent les faisceaux passés et les renvoient pour qu'ils se chevauchent au niveau d'un plan de sortie (80) pour former des franges d'interférence.
PCT/US1997/017850 1996-10-28 1997-10-01 Appareil et procede de generation d'element diffractif a l'aide d'un affichage a cristaux liquides Ceased WO1998014805A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA002267316A CA2267316C (fr) 1996-10-28 1997-10-01 Appareil et procede de generation d'element diffractif a l'aide d'un affichage a cristaux liquides
EP97945468A EP0934540B1 (fr) 1996-10-28 1997-10-01 Appareil et procede de generation d'element diffractif a l'aide d'un affichage a cristaux liquides
DE69732042T DE69732042T2 (de) 1996-10-28 1997-10-01 Vorrichtung und verfahren zur erzeugung eines diffraktiven elements unter verwendung einer flüssigkristallanzeige
AT97945468T ATE285589T1 (de) 1996-10-28 1997-10-01 Vorrichtung und verfahren zur erzeugung eines diffraktiven elements unter verwendung einer flüssigkristallanzeige

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/738,767 US5986781A (en) 1996-10-28 1996-10-28 Apparatus and method for generating diffractive element using liquid crystal display
US08/738,767 1996-10-28

Publications (2)

Publication Number Publication Date
WO1998014805A1 WO1998014805A1 (fr) 1998-04-09
WO1998014805B1 true WO1998014805B1 (fr) 1998-06-04

Family

ID=24969387

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/017850 Ceased WO1998014805A1 (fr) 1996-10-28 1997-10-01 Appareil et procede de generation d'element diffractif a l'aide d'un affichage a cristaux liquides

Country Status (6)

Country Link
US (4) US5986781A (fr)
EP (2) EP0934540B1 (fr)
AT (1) ATE285589T1 (fr)
CA (1) CA2267316C (fr)
DE (1) DE69732042T2 (fr)
WO (1) WO1998014805A1 (fr)

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