EP0759184A1 - Luminescent and transparent projection screen - Google Patents

Luminescent and transparent projection screen

Info

Publication number
EP0759184A1
EP0759184A1 EP94928921A EP94928921A EP0759184A1 EP 0759184 A1 EP0759184 A1 EP 0759184A1 EP 94928921 A EP94928921 A EP 94928921A EP 94928921 A EP94928921 A EP 94928921A EP 0759184 A1 EP0759184 A1 EP 0759184A1
Authority
EP
European Patent Office
Prior art keywords
projection screen
screen
transparent
luminescent
projection
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.)
Withdrawn
Application number
EP94928921A
Other languages
German (de)
French (fr)
Inventor
Joseph COHEN-JONATHAN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0759184A1 publication Critical patent/EP0759184A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/32—Holograms used as optical elements

Definitions

  • the present invention relates to a transparent projection screen which allows a reproduction and a diffusion of a projected image in full light without chromatic and optical alteration.
  • the subject of the invention is a projection screen characterized in that it comprises a transparent holographic film recorded on a laser bench according to holographic techniques.
  • This film is then laminated on transparent supports such as glass plates or transparent plexiglass, which will constitute once assembled, the projection screen, which can then be installed in any exhibition space.
  • This transparent projection screen provided with a recorded holographic film allows the reproduction of a two-dimensional image by reflection or by transmission with excellent light output on both sides and without loss of chromatic and optical quality. What allows, the installation of this screen, in a place from which emanates a strong external uminosity without the spectators or the televiewers being embarrassed.
  • This screen can also be produced from a transparent plate coated with a photosensitive layer treated according to the same process.
  • the screen can also be used for the projection of still views (slides) or cinematographic films.
  • the screen will consist of a holographic photosensitive film recorded on a laser bench, the holography object of which will preferably be a white, matt and flat surface (reflecting wavelengths between 400 and 800 nanometers) .
  • This process causes a particular modification of the sensitive surface, which remains transparent, since particular of the sensitive surface, which while remaining transparent, since the "object" holography is a uniform white surface acquires the property of stopping a light beam and reflect it on both sides.
  • This surface will for example be a painted or frosted glass slab.
  • a holographic film once recorded, it can be laminated on a glass or transparent plastic sheet.
  • a projection screen of this type in order to reproduce at a lower cost, in series, a projection screen of this type, we will proceed as follows: from the holographic film thus produced, a sensitized metal plate is printed on which we will deposit nickel by electrolysis. This plate will then serve as a matrix for embossing a transparent organic film which will have the same properties as the original holographic film.
  • This transparent organic film intended for embossing chosen for its resistance qualities (thermal shocks) will then be able to provide the same function as the metal plate.
  • This process has the advantage of being able to produce screens from materials whose mechanical and thermal resistance can be chosen according to their use.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Holo Graphy (AREA)

Abstract

Projection screen capable of restitution of an image having chromatic and luminescent qualities higher than those obtained with a conventional screen, even in full light. It is comprised of a photosensitive plate having the property of restituting the image projected by reflection and by transmission. Said plate is protected, on one or two sides, by a transparent mineral or organic support. The disclosed screen is intended for any type of projection (cinema, video projector...).

Description

ECRAN DE PROJECTION TRANSPARENT ET LUMINESCENT TRANSPARENT AND LUMINESCENT PROJECTION SCREEN
La présente invention concerne un écran de projection transparent qui permet une restitution et une diffusion d'une image projetée en pleine lumière sans altération chromatique et optique.The present invention relates to a transparent projection screen which allows a reproduction and a diffusion of a projected image in full light without chromatic and optical alteration.
Jusqu'à présent pour projeter ou montrer une image, le support était obligatoirement un écran opaque: mur, toile, écran perlé, en aluminium... Ce qui limitait considérablement la visualisation de l'image ainsi que les lieux d'exposition. Ces écrans de projection ne sont pas transparents et la restitution de l'image s'effectue généralement dans la pénombre.Until now to project or show an image, the support was necessarily an opaque screen: wall, canvas, beaded screen, aluminum ... This considerably limited the viewing of the image as well as the exhibition places. These projection screens are not transparent and the image is generally rendered in darkness.
L'invention a pour objet un écran de projection caractérisé en ce qu'il comprend un film holographique transparent enregistré sur banc laser suivant les techniques holographiques.The subject of the invention is a projection screen characterized in that it comprises a transparent holographic film recorded on a laser bench according to holographic techniques.
Ce film est ensuite contrecollé sur des supports transparents tels plaques de verre ou plexiglass transparents aussi, qui constitueront une fois assemblés, l'écran de projection, que l'on pourra alors installer dans tout lieu d'exposition. Cet écran de projection transparent pourvu d'un film holographique enregistré permet la restitution d'une image en deux dimensions par réflexion ou par transmission avec un excellent rendement lumineux sur les deux faces et sans perte de qualité chromatique et optique. Ce qui permet, l'installation de cet écran, dans un lieu d'où s'émane une forte uminosité extérieure sans que les spectateurs ou les téléspectateurs en soient gênés.This film is then laminated on transparent supports such as glass plates or transparent plexiglass, which will constitute once assembled, the projection screen, which can then be installed in any exhibition space. This transparent projection screen provided with a recorded holographic film allows the reproduction of a two-dimensional image by reflection or by transmission with excellent light output on both sides and without loss of chromatic and optical quality. What allows, the installation of this screen, in a place from which emanates a strong external uminosity without the spectators or the televiewers being embarrassed.
Cet écran peut aussi être réalisé à partir d'une plaque transparente revêtue d'une couche photosensible traitée suivant le même procédé.This screen can also be produced from a transparent plate coated with a photosensitive layer treated according to the same process.
Cet écran peut aussi bien s'utiliser pour la projection de vue fixes (diapositives) ou de films cinématographiques. Selon un premier mode de réalisation, l'écran sera constitué d'un film photosensible holographique enregistré sur banc laser dont l'objet holographie sera de préférence une surface blanche, mate et plane (reflétant des longueurs d'ondes entre 400 et 800 nanomètres). Ce procédé provoque une modification particulière de la surface sensible, ce qui en restant transparente, puisque particulière de la surface sensible, ce qui tout en restant transparente, puisque "l'objet" holographie est une surface blanche uniforme acquiert la propriété d'arrêter un faisceau lumineux et de le réfléchir sur ses deux côtés. Cette surface sera par exemple une dalle de verre peinte ou dépolie.This screen can also be used for the projection of still views (slides) or cinematographic films. According to a first embodiment, the screen will consist of a holographic photosensitive film recorded on a laser bench, the holography object of which will preferably be a white, matt and flat surface (reflecting wavelengths between 400 and 800 nanometers) . This process causes a particular modification of the sensitive surface, which remains transparent, since particular of the sensitive surface, which while remaining transparent, since the "object" holography is a uniform white surface acquires the property of stopping a light beam and reflect it on both sides. This surface will for example be a painted or frosted glass slab.
Dans le cas d'un film holographique, une fois enregistré, il pourra être contrecollé sur une plaque de verre ou de matière plastique transparent.In the case of a holographic film, once recorded, it can be laminated on a glass or transparent plastic sheet.
Comme application à titre d'exemple, on peut envisager une baie vitrée d'immeuble, une vitrine de magasin qui deviendra alors, l'écran de projection. Ce film contrecollé sur plaques de verre qui pourront être équipées de portants avec crochets ou autres liens d'attaches destinés à l'accrochage de l'ensemble constitueront alors, l'écran de projection.As an example application, we can consider a bay window of a building, a shop window which will then become the projection screen. This film laminated on glass plates which can be fitted with supports with hooks or other fastening links intended for the attachment of the assembly will then constitute the projection screen.
Selon un second mode de réalisation, dans le but de reproduire à moindre coût, en série, un écran de projection de ce type, on procédera de la façon suivante: à partir du film holographique ainsi réalisé, on impressionne une plaque métallique sensibilisée sur laquelle on viendra déposer du nickel par électrolyse. Cette plaque servira alors de matrice pour embosser un film organique transparent qui aura les mêmes propriétés que le film holographique original.According to a second embodiment, in order to reproduce at a lower cost, in series, a projection screen of this type, we will proceed as follows: from the holographic film thus produced, a sensitized metal plate is printed on which we will deposit nickel by electrolysis. This plate will then serve as a matrix for embossing a transparent organic film which will have the same properties as the original holographic film.
Ce film organique transparent destiné à l'embossage, chosi pour ses qualités de résistance (chocs thermiques) pourra alors, assurer la même fonction que la plaque métallique.This transparent organic film intended for embossing, chosen for its resistance qualities (thermal shocks) will then be able to provide the same function as the metal plate.
Ce procédé a l'avantage de pouvoir réaliser des écrans en matériaux dont la résistance mécanique et thermique peut être choisi en fonction de leur utilisation. This process has the advantage of being able to produce screens from materials whose mechanical and thermal resistance can be chosen according to their use.

Claims

REVENDICATIONS
1) Ecran de projection caractérisé en ce qu'il comprend l'hologramme d'une surface blanche, mate et plane, reflétant des longueurs d'ondes entre 400 et 800 nanomètres, l'holographie ayant été réalisée sur un banc laser capable de restituer la couleur blanche.1) Projection screen characterized in that it includes the hologram of a white, matt and flat surface, reflecting wavelengths between 400 and 800 nanometers, the holography having been carried out on a laser bench capable of rendering the color white.
2) Ecran selon la revendication 1 caractérisé en ce que le film est fixé sur un support tel qu'une plaque de verre ou un autre matériau transparent, sur une ou deux faces. 2) Screen according to claim 1 characterized in that the film is fixed on a support such as a glass plate or another transparent material, on one or two sides.
EP94928921A 1994-09-27 1994-09-27 Luminescent and transparent projection screen Withdrawn EP0759184A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR1994/001130 WO1996010212A1 (en) 1994-09-27 1994-09-27 Luminescent and transparent projection screen

Publications (1)

Publication Number Publication Date
EP0759184A1 true EP0759184A1 (en) 1997-02-26

Family

ID=9459666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94928921A Withdrawn EP0759184A1 (en) 1994-09-27 1994-09-27 Luminescent and transparent projection screen

Country Status (3)

Country Link
EP (1) EP0759184A1 (en)
AU (1) AU7815894A (en)
WO (1) WO1996010212A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4500163A (en) * 1981-07-29 1985-02-19 The Singer Company Holographic projection screen
GB2222000A (en) * 1988-06-22 1990-02-21 Dimplex Ltd Glen Optical component used for flame effect in heating apparatus
US5046793A (en) * 1989-05-26 1991-09-10 Litton Systems, Inc. Chromatically corrected directional diffusing screen
FR2640772B1 (en) * 1989-06-01 1992-09-04 Lunazzi Jose PROCEDURE AND DEVICE FOR PROJECTING AND OBSERVING DIFFERENTIATED OR STEREOSCOPIC IMAGES, DRAWINGS, PHOTOGRAPHS, CINEMATOGRAPHIC OR VIDEO FILMS
FR2699289B1 (en) * 1992-12-15 1995-01-06 Thomson Csf Holographic projection screen and production method.
FR2704076B1 (en) * 1993-04-15 1997-12-19 Cohen Jonathan Joseph Transparent luminescent projection screen.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9610212A1 *

Also Published As

Publication number Publication date
AU7815894A (en) 1996-04-19
WO1996010212A1 (en) 1996-04-04

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