WO2006111384A9 - Procede pour produire des hologrammes a angle reduit et dispositif pour les reproduire - Google Patents

Procede pour produire des hologrammes a angle reduit et dispositif pour les reproduire

Info

Publication number
WO2006111384A9
WO2006111384A9 PCT/EP2006/003624 EP2006003624W WO2006111384A9 WO 2006111384 A9 WO2006111384 A9 WO 2006111384A9 EP 2006003624 W EP2006003624 W EP 2006003624W WO 2006111384 A9 WO2006111384 A9 WO 2006111384A9
Authority
WO
WIPO (PCT)
Prior art keywords
hologram
holograms
subclaims
reference beam
angle
Prior art date
Application number
PCT/EP2006/003624
Other languages
German (de)
English (en)
Other versions
WO2006111384A1 (fr
Inventor
Marcus Werner
Original Assignee
Marcus Werner
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 Marcus Werner filed Critical Marcus Werner
Publication of WO2006111384A1 publication Critical patent/WO2006111384A1/fr
Publication of WO2006111384A9 publication Critical patent/WO2006111384A9/fr

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/0402—Recording geometries or arrangements
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/0486—Improving or monitoring the quality of the record, e.g. by compensating distortions, aberrations
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/20—Copying holograms by holographic, i.e. optical means
    • G03H1/202—Contact copy when the reconstruction beam for the master H1 also serves as reference beam for the copy H2
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/0465—Particular recording light; Beam shape or geometry
    • G03H2001/0473—Particular illumination angle between object or reference beams and hologram
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • G03H1/2202—Reconstruction geometries or arrangements
    • G03H2001/2223—Particular relationship between light source, hologram and observer
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • G03H1/2202—Reconstruction geometries or arrangements
    • G03H2001/2223—Particular relationship between light source, hologram and observer
    • G03H2001/2231—Reflection reconstruction
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • G03H1/2249—Holobject properties
    • G03H2001/2273—Pseudo-dynamic holobject, e.g. due to angle multiplexing and viewer motion
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2223/00—Optical components
    • G03H2223/18—Prism
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2223/00—Optical components
    • G03H2223/25—Index matching material
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2227/00—Mechanical components or mechanical aspects not otherwise provided for
    • G03H2227/05—Support holding the holographic record
    • G03H2227/06—Support including light source
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2250/00—Laminate comprising a hologram layer
    • G03H2250/33—Absorbing layer

Definitions

  • the invention relates to a method for producing holograms according to claim I and subclaims and to devices for reproducing these holograms according to claim 2 and subclaims.
  • holograms have been used in a wide variety of fields: as an artistic medium, as a cultural archiving medium (for example, in archeology for cuneiform writing), as an advertising medium or as a security feature on products.
  • holograms are increasingly integrated, as an example holographic projection screens, but also notch filters or Bragg gratings are e.g. in the field of optical information processing or beam forming.
  • the holographic-optical recording and the printing of holograms with special embossing stamps the second method must precede an optical recording to create the stamp (mastering process).
  • Hologrammfilme- or plates for the optical recording of holograms usually consist of a flat support layer (glass, plastic) and a photosensitive hologram layer (silver halide gelatin, photopolymer, etc.) with a thickness of about 5 microns - 100 microns.
  • the refractive index of a hologram plate based on glass or plastic is approximately 1, 5, the refractive indices of the photosensitive layer and the support material are chosen as equal as possible.
  • the photosensitive layer In order to produce a hologram, the photosensitive layer must be exposed with a reference beam and coherent object beams.
  • phase stability should be better ⁇ / 10, which corresponds to about 0.5 microns. This means that no component involved in the beam path should move by more than 0.5 ⁇ m during the recording.
  • the laser light source must have sufficient temporal and spatial coherence.
  • the reference beam In the case of exposure according to the standard method, moreover, the reference beam must be directed as precisely as possible under the so-called “Brewster angle" (approximately 57 degrees to the plate standard for glass) onto the glass or film plate. At this angle, suitably polarized light is not reflected to air at the two air-to-glass and photosensitive layer interfaces. Different geometries create strong multiple reflections within the recording medium and significantly reduce the quality of reproduction. This is especially true for large angles to the plate normal (flat angle of incidence). This effect occurs even more in holographic films, since here the flexible film is inserted between two glass plates for reasons of stability, resulting in a total of four glass-air and two film-air transitions. In contrast to glass slides, film materials are less expensive and, moreover, easier to handle [see H. I. Bjelkhagen "Silver Halide Recording Materials", Springer 1993, p.53]
  • the hologram After exposure, the hologram is appropriately developed and sealed.
  • the reconstruction can take place both with laser light of suitable wavelength and with other light sources.
  • the recording geometry significantly determines the requirements for the illumination of the finished hologram. Although the requirement for the high coherence of light during playback is eliminated. Nevertheless, the illumination beam used for the reconstruction of holograms must correspond as closely as possible to the reference beam used in the recording, otherwise image errors occur. These are comparable to the aberrations of imaging systems in the deviation from the optical axis.
  • the illumination beam must represent the best possible point light source (in the limit radius infinite: plane wave), because an extended light source leads to multiple overlapping views through multiple reconstruction. If only diffused ambient light is available, the usable depth of a hologram is minimal. All displayed parts of the picture, which are not directly in the hologram plane, appear very blurry.
  • edge lit holograms is extremely expensive, since even small changes in the refractive indices, angles and other geometric conditions greatly reduce the quality of reproduction.
  • the abovementioned patent therefore describes several methods for improving the "edge-lit” technique, in particular special methods for selectively influencing the refractive power of the reproducing layer, which according to the above patent enables the evanescent mode to be relatively stable at an angle greater than 80 degrees to thread the hologram normal ("steep reference angle, SRA-hologram").
  • this SRA hologram with a second hologram-like structure is mounted on a transparent plate and described as a "holography light panel" (HLP) with extensive applications.
  • HLP holography light panel
  • Another principal disadvantage is the lateral threading of the light beam.
  • An evenly uniform illumination of a hologram requires a carefully tuned variation of the diffraction efficiency over the entire course of the route in the emulsion; here, too, small manufacturing tolerances quickly have a negative effect.
  • an overall low diffraction efficiency wheel eliminates this problem, but leads to a low utilization of the light source. Fluctuations in diffraction efficiency are, however, inevitable in hologram production.
  • the object of the invention is the simple production of holograms with compact lighting and matching playback devices.
  • the following points are of crucial importance:
  • the beam path of the hologram object for reproduction (hereinafter referred to as "object") should be so compact that it can be built within the object without significantly increasing its dimensions.
  • the light source for example, laser, LED
  • the light source should be integrable into the object without expensive optics, if necessary including the power supply.
  • a dynamically switchable selective illumination of different hologram areas or a lighting at different angles should be easy to implement.
  • the reference beam should not be able to escape from the object unintentionally.
  • the reference beam should be able to be secured against contact or manipulation without restricting the view of the hologram installed in the object.
  • the presented solution therefore comprises two aspects, which are described separately under the points hologram recording and hologram reproduction.
  • Holograms can be produced with an arbitrarily steep illumination angle.
  • the structure (see also embodiment) consists of an adapter block, which allows a small rotation of the holographic film when recording within this block. Since the same refractive index is almost everywhere within the block, no multiple reflections are triggered. This can be achieved by means of two transparent Plexiglas wedges twisted 180 degrees against each other, in the film is loaded with a liquid of the same refractive index. The film is now rotated by the wedge angle against the parallel outer sides of the wedges. The whole block is used like a normal hologram plate, which means that the reference beam falls on the outside in the Brewster angle. Therefore, no reflections occur during the beam passage.
  • the slight residual tilting of the object during playback can be compensated by an opposite tilting during recording.
  • the internal twist angle is only 7.81 degrees.
  • a twist of about 7 degrees is sufficient.
  • the block must be oriented so that the tilt is the angle between the reference beam and the film reduced.
  • the necessary thickness of the adapter block at 7 degrees of internal rotation corresponds to only 0.12 times the film length in the illumination direction (tan (7 G / m /) * ⁇ 0.12), so that no changes to standard hologram copy or recording constructions are necessary are.
  • the reproducing apparatus will be described. Instead of illuminating the hologram at an external angle of about 33 degrees to the hologram plane, the viewing angle can be drastically reduced.
  • a suitable beam guide folded in front of or behind the hologram plane a very compact construction of the beam guide can be achieved.
  • the difference in the internal angle with respect to a normally reconstructed hologram is small. (Thus the internal angle changes by only 7 degrees when the external angle is reduced from 33 degrees to 10 degrees to the hologram plane, see above). Therefore, the reproducing properties of the hologram (spectral selectivity, angle selectivity, diffraction efficiency) remain almost identical.
  • the holograms made in this way can now be combined with compact beam guidance and built-in light sources such as e.g. LED's or laser diodes are housed hidden in the frame.
  • the ratio of length to frame thickness is easily reducible to 10/1, i. a 20 cm hologram only needs a 2 cm thick frame to encapsulate the beam path and the lighting.
  • a relatively thicker frame is acceptable, because aesthetically, the aspect ratio and not the absolute frame thickness is aesthetically crucial.
  • the holograms remain sufficiently light even with very large formats.
  • An encapsulated beam guidance offers just in laser or LED lighting a decisive safety advantage, therefore, now the illuminance can be greatly increased here without endangering the viewer. This is very important especially for applications in the daylight area, as holograms have so far usually not been sufficiently bright. Due to the necessarily steep reconstruction angle, the problem of unwanted reconstruction of the hologram is also solved by external extraneous light sources, because such extremely oblique incident light rays can be easily intercepted (by the edge panels). This represents a decisive advantage in the use of holograms in normally illuminated areas and opens up the possibility of such holograms, e.g. to replace traffic signs, warning signs, city or building plans.
  • Another decisive advantage is the remaining freedom for the fine adjustment of the reference beam.
  • Production-related deviations of the reproduction wavelength of the hologram can be compensated by changing the reconstruction angle.
  • multiple-exposure holograms can represent different views through switched light sources, e.g. show movie-like motion sequences.
  • Portions of the hologram can be selectively illuminated, e.g. Signaling operating states in integration with other devices (e.g., computer front ends, multimedia devices, etc.).
  • the combination with distance detectors is possible, e.g. to simulate three-dimensional on / off buttons.
  • With multiple light sources also redundant illumination is also possible, which is e.g. decisive in the case of warning signs in the traffic sector.
  • integrated projectors can be used instead of simple light sources for lighting, so that the arrangement can be used in whole or in part as a flat projection screen.
  • Drawing 1 shows a simple reproduction device.
  • the beam path begins on the underside of the hologram within the lower frame part.
  • the light source attached here is deflected to mirror 1 and illuminates the mounted in the upper frame part mirror. This reflects the light beam onto the hologram, with the beam including the hologram surface at an angle of 10 degrees.
  • the reflected at the front of the glass or the film foil portion falls back into the lower part of the frame, where it is absorbed by a piece of black textile adhesive film.
  • the portion falling into the hologram plate is refracted toward the solder and strikes the film emulsion on the back of the plate and reconstructs the hologram.
  • the remaining portion not used for the reconstruction is absorbed in the rearmost layer by an applied color or blackening layer.
  • the hologram is to be translucent to underlying objects, one can use here only for the wavelength used selective color foil or introduced into the gelatin selective dye, otherwise a blackening is sufficient.
  • the mirror S can be designed as a hollow or cylindrical mirror to provide a plane wave available.
  • Other beam-shaping elements (lenses, Fresnel lenses, cylindrical lenses, holographic grids) can be introduced to improve the flatness of the wave or for better illumination in the beam path.
  • the drawings 2a, 2b show a possible receiving device. These are two transparent wedges (Plexiglas, for example) which are twisted 180 degrees apart. The wedge angle is 7 degrees. An additional collecting tray attached to the lower wedge acts as a reservoir for the index-matching liquid. A widened edge is suitably attached to the upper wedge, which prevents the index-matching liquid from reaching the upper surface from the collecting volume. The matching to this edge O-ring on the top of the drip tray serves to seal. The film is placed on the lower wedge, with a precisely cutout prevents the film plate or film from slipping. Subsequently, the second wedge is placed, thereby the liquid is displaced upwards and therefore fills up the entire gap volume. The upper wedge is now fixed with retaining clips.
  • the outer surfaces of the two wedges are parallel to each other, so that the whole arrangement can be brought into the reference beam as in normal hologram recordings in Brewster angle.
  • the object light falls as in conventional recording arrangements in the hologram plane, this comes either directly from the object to be recorded or is generated by a normal master hologram. After taking the film, the film is removed, cleaned of oil residue and developed.
  • Drawing 3 shows a lighting arrangement for a view of the hologram mounted as seen by the viewer lighting while minimizing the emerging at the front of the carrier medium portion of the reference beam, which is equally usable in this form for reflection as transmission holograms.
  • the reference beam R enters the sandwich via the anti-reflective right side (anti-reflection layer Si), while a small amount is reflected.
  • the carrier layer G glass, plastic
  • the beam passes through the holographic emulsion E, without being able to reconstruct the hologram, since the Bragg condition is not fulfilled.
  • the beam After passing through the second carrier layer G, the beam impinges on the multilayer coating S 2, which is optimized exclusively for the reflection of very flat rays.
  • the reference beam is reflected. A small portion is not reflected but emerges from the sandwich at a steep angle towards the viewer. The reflected beam again traverses the carrier layer G on the return path and then the emulsion E, wherein the holographic representation S is now reconstructed to the left. After passing through the next carrier layer, the beam emerges from the sandwich except for a small amount of reflection. Due to the reflections of about 50% at the flat angles used here, the anti-reflection and anti-reflection S i and S2 can also be omitted, it merely optimizes the brightness and reduces the leaving residual portion R F. Alternatively, one or more transparent plates with an air gap on the left side of the assembly may serve the same purpose (see drawing 4 and description). The beam away for that Transmission hologram is similar, except that the reconstruction already takes place on the way of the beam.
  • Drawing 4 shows an alternative arrangement using a transparent glass plate in line of sight between viewer and hologram.
  • the glass plate G is used for deflecting the beam of the light source L onto the hologram H.
  • the back of the hologram can be blackened to absorb the emerging reference beam.
  • the plate is illuminated from behind, the reconstruction is carried out at reflection holograms with the reflected at the front of the hologram plate portion. The non-reflected portion falls on the glass plate G and is again directed to the hologram.
  • the light component used for the reproduction can be increased again.
  • Elements for beam shaping (lenses, mirrors) of the light source can be integrated and increase the reproduction quality and brightness, but are not absolutely necessary.
  • Drawing 5 shows the structure of a seamlessly tileable hologram.
  • both reflective holograms and transmission holograms can be used, or simple angle-reduced transmission holograms are used.
  • the light source L is focused by means of the cylindrical lens Z and enters the mirror S, which directs the light beam onto the angle-reduced hologram.
  • the mirror S can be designed as a cylindrical or concave mirror. Suitable alternative lighting systems can be used equally. Since all light guide elements lie on the side facing away from the viewer, they do not hide the holographic representation. Correspondingly constructed individual elements can now be seamlessly joined to one another (see drawing 5, second and third column), a suitable mechanical attachment can be made from behind or by mounting on a transparent plate.
  • Drawing 6 shows the possibility of animating three-dimensional multiplex holograms (holograms in which for example a film sequence is encoded in the angle holographic representation, this is done by selective exposure of the hologram with individual images), without the user having to change his position with respect to the hologram.
  • the reference beam for example, time-controlled.
  • the perspective orientation of the object shown changes, so that a viewer gets a new perspective with each new reference beam angle.
  • Normal holograms show a rotation of the object.
  • multiplex holograms can show any two- or three-dimensional sequences.
  • the animation can be easily arranged by switching light sources arranged in a row (light source array LL) below a cylindrical lens Z. are, happened.
  • the mirror S directs the light onto the hologram SH.
  • Alternative options would be motorized tilting of the mirror, the application of a galvanic mirror scanner in the beam path of the light source, an Aukusto optical modulator in the light beam, a spatial method of the light source and similar methods (rotating mirrors, rotary prisms, movable lenses).
  • Drawing 7 shows the use of angle reduced holograms to construct flat, dynamic three-dimensional screens.
  • the images of different image projectors for example computer beamer
  • Each projector has a slightly different angle of incidence, similar to the light sources of the animated hologram (see description to drawing 6).
  • each image of an imager is projected in a direction offset from the next image, the angular extent of each projection being determined by the fringe width.
  • the individual projector images will be repeated in cyclic order depending on the viewing angle. At appropriate intervals, the viewer's left and right eyes thus receive two different images.
  • each projector is assigned a suitable perspective of a three-dimensional scene, a three-dimensional image becomes visible to the viewer.
  • the generation of dynamic images can be done, for example, by one computer per projector, which calculates the respective perspective in real time and represented by a suitable graphics card. Registration of the user's hand movements may be used to simulate an interaction of the user with the illustrated three-dimensional objects.
  • an intensity-modulating, transparent display can be applied to the front of an animated strip hologram.
  • the hologram sends light rays in a temporal sequence in different spatial directions.
  • the display of the display can display the different perspectives synchronously with the switching of the illumination directions and thus also produce a dynamic three-dimensional representation.
  • Drawing 8 shows a possible arrangement for the direct creation of computer-generated angle-reduced holograms by stepwise exposure of the recording medium.
  • the structure for achieving the angle reduction is analogous to drawing 2 and description, with the difference that the recording medium is movably mounted between the prisms A and B.
  • the described structure serves to generate reflection holograms when using the reference beam R R , transmission holograms are obtained by illuminating the recording location with the reference beam R x through the prism B.
  • Laser light is modulated by an imaging system (for example by an LCD display) and converted by a suitable optics O to the signal beam S.
  • the signal beam S then penetrates the prism B and hits the recording location.
  • the reference beam R is directed at the Brewster angle on the prism A and also hits the recording location.
  • Both beams were previously obtained in a conventional manner by means of a beam splitter and appropriate optical processing of a laser, so that they are coherent with each other and so can write a hologram in the recording medium.
  • the recording medium itself is located in the tub W, which is filled with a liquid for adjusting the refractive index IM.
  • the transition between prism B and the tub is sealed so that no liquid can escape.
  • FIG. 9 shows an exemplary geometry for arbitrarily rendering different holograms with different reference beams.
  • multiplexing thin holograms - as they represent most holographic recording media with thicknesses between 5 - 50 microns - requires very different Bragg angle for clear separation of the playback of the individual holograms. This is taken into account in the exemplary construction.
  • Four narrow mirror strips adhered vertically to the rear side of the angle-reduced hologram each reflect the light of the light sources A, B, C and D at a shallow angle to the hologram.
  • the beam extension by means of the mirror strips reduces the divergence.
  • any other suitable beam guidance is equally applicable.
  • four completely different holograms can be displayed selectively or together with any single intensity.
  • different states can be displayed in the sense of a signal representation. Instead, if one encodes the colors red, green and blue of an overall colored representation in three channels of the four channels, a perfect white balance is possible by controlling the three light sources.

Landscapes

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

Abstract

L'invention concerne un nouveau procédé servant à produire des hologrammes pouvant être reconstruits avec un angle d'incidence très plat du faisceau de référence. Tous les procédés standard de l'holographie restent utilisables lors du processus de production et ce procédé permet de générer aussi bien des hologrammes de réflexion que des hologrammes de transmission. La production nécessite un bloc adaptateur spécifique dans lequel le milieu d'enregistrement peut être inséré après avoir été tourné d'un petit angle vers les faces extérieures. Le bloc adaptateur est ensuite rempli d'un liquide adaptateur d'indice. La modification de l'angle interne lors de la prise de vue entraîne une modification sensiblement plus importante de l'angle externe nécessaire à la reconstruction ; on parle donc d'hologrammes à angle réduit. Les hologrammes à angle réduit permettent d'avoir un ensemble plat encapsulé pour la source lumineuse et l'hologramme lors de la reconstruction. L'invention concerne également des montages appropriés pour la reconstruction d'hologrammes de réflexion et de transmission à angle réduit, notamment des dispositifs pour l'augmentation du rendement lumineux, pour la réduction du faisceau de référence sortant, pour la juxtaposition sans soudure du dispositif de reconstruction ou des dispositifs d'illumination, pour l'animation des contenus représentés ou pour la commutation ciblée entre différents hologrammes par multiplexage, pour la mise en oeuvre en combinaison avec un ou plusieurs systèmes d'imagerie afin de constituer un dispositif d'affichage tridimensionnel dynamique, ainsi que pour la constitution d'un système d'illumination holographiquement séquentiel pour la production automatisée d'hologrammes à angle réduit à contenus représentables quelconques.
PCT/EP2006/003624 2005-04-22 2006-04-20 Procede pour produire des hologrammes a angle reduit et dispositif pour les reproduire WO2006111384A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510018750 DE102005018750A1 (de) 2005-04-22 2005-04-22 Verfahren zur Herstellung von winkelreduzierter Hologrammen sowie der integrierten Wiedergabe winkelreduzierter Hologramme
DE102005018750.1 2005-04-22

Publications (2)

Publication Number Publication Date
WO2006111384A1 WO2006111384A1 (fr) 2006-10-26
WO2006111384A9 true WO2006111384A9 (fr) 2007-01-18

Family

ID=36694992

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/003624 WO2006111384A1 (fr) 2005-04-22 2006-04-20 Procede pour produire des hologrammes a angle reduit et dispositif pour les reproduire

Country Status (2)

Country Link
DE (1) DE102005018750A1 (fr)
WO (1) WO2006111384A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2431786A1 (fr) 2010-09-17 2012-03-21 Bayer MaterialScience AG Ecran 3D auto-stéréoscopique
CN104704407A (zh) 2012-08-13 2015-06-10 拜耳材料科技股份有限公司 带有退耦元件的光引导板
US10180520B2 (en) 2015-08-24 2019-01-15 Akonia Holographics, Llc Skew mirrors, methods of use, and methods of manufacture

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2039823C (fr) * 1990-04-16 1995-07-04 Ronald T. Smith Feu d'arret sureleve, a faisceau holographique, pour vehicule automobile
GB9304944D0 (en) * 1993-03-11 1993-04-28 Pilkington Perkin Elmer Ltd Head-up displays
JPH06337316A (ja) * 1993-05-28 1994-12-06 Nissan Motor Co Ltd 表示装置
JPH0728380A (ja) * 1993-07-09 1995-01-31 Sony Corp エッジリットホログラムの露光方法及びそれに用いるガラスブロック
WO1995004294A2 (fr) * 1993-07-21 1995-02-09 Imedge Technology, Inc. Hologrammes et panneaux lumineux
JPH07129070A (ja) * 1993-09-06 1995-05-19 Toppan Printing Co Ltd ディスプレイ装置
US5781317A (en) * 1993-09-14 1998-07-14 Nippondenso Co., Ltd. Method of producing holographic optical element and device therefor
WO2000049467A1 (fr) * 1999-02-16 2000-08-24 Zebra Imaging, Inc. Systeme et procede de production et de presentation d'un hologramme a eclairage peripherique en une etape

Also Published As

Publication number Publication date
WO2006111384A1 (fr) 2006-10-26
DE102005018750A1 (de) 2006-10-26

Similar Documents

Publication Publication Date Title
DE69635804T2 (de) Grosse zusammengesetzte anzeigenhologramme und verfahren
DE102011051734B4 (de) Digitale Hologramm-Bildwiedergabevorrichtung
EP1880252B1 (fr) Dispositif de projection et procede de reconstruction holographique de scenes
DE60014168T2 (de) Holographischer drucker
JP7358235B2 (ja) ホログラフィックディスプレイ装置
US4623215A (en) Holograms
DE112015000351T5 (de) Anzeigevorrichtung für eine holografische Rekonstruktion
DE102012215540B4 (de) Individualisierungseinrichtung und Belichtungsvorrichtung für Hologramme
DE19924096C2 (de) System zur stereoskopischen Bilddarstellung
DE102011051735B4 (de) Digitale Hologramm-Bildwiedergabevorrichtung
WO1998005993A1 (fr) Systeme holographique de production de grandes images
DE102013112857A1 (de) Vorrichtung zum Anzeigen eines Hologramms
WO1998021619A1 (fr) Affichage par hologramme stereo
DE1497565A1 (de) Hologrammabdruckkopie und Verfahren zu ihrer Herstellung und Wiedergabe
WO2006111384A9 (fr) Procede pour produire des hologrammes a angle reduit et dispositif pour les reproduire
DE2406168A1 (de) Lichtstreuschirm fuer optische geraete
WO2013087447A1 (fr) Procédé et dispositif pour produire un écran holographique pour une projection frontale électronique
EP1664921A2 (fr) Procede de fabrication d'un support pour la reproduction d'une representation en trois dimensions
WO2002006864A1 (fr) Ecran holographique
DE2060838A1 (de) Holographisches Fernseh-Aufzeichnungssystem
GB2149532A (en) Improvements in or relating to holograms
EP1004903A1 (fr) Méthode de fabrication d'un écran holographique pour la reproduction autostéréoscopique ou stéréoscopique d'images et d'images en mouvement
DE1572606C3 (de) Verfahren und Vorrichtung zur Herstellung von Vielfachparallaxbildern mit Hilfe der Holographie
DE112022002831T5 (de) Bildanzeigevorrichtung und optisches lichtleitersystem
EP1203262A1 (fr) Dispositif et procede de projection holographique et dispositif et procede d'exposition

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase in:

Ref country code: RU

WWW Wipo information: withdrawn in national office

Country of ref document: RU

122 Ep: pct application non-entry in european phase

Ref document number: 06724456

Country of ref document: EP

Kind code of ref document: A1