WO2015108272A1 - Dispositif d'enregistrement de front d'onde holographique et procédé de reproduction d'images holographiques en couleur sans discontinuité - Google Patents

Dispositif d'enregistrement de front d'onde holographique et procédé de reproduction d'images holographiques en couleur sans discontinuité Download PDF

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Publication number
WO2015108272A1
WO2015108272A1 PCT/KR2014/010944 KR2014010944W WO2015108272A1 WO 2015108272 A1 WO2015108272 A1 WO 2015108272A1 KR 2014010944 W KR2014010944 W KR 2014010944W WO 2015108272 A1 WO2015108272 A1 WO 2015108272A1
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WIPO (PCT)
Prior art keywords
holographic
color
wavefront
recording medium
diffracted
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Application number
PCT/KR2014/010944
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English (en)
Korean (ko)
Inventor
김영민
강훈종
정광모
홍성희
바디모브나 스토이코바엘레나
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전자부품연구원
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Publication of WO2015108272A1 publication Critical patent/WO2015108272A1/fr

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    • 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
    • G03H1/0476—Holographic printer
    • 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
    • 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
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • G03H1/2202—Reconstruction geometries or arrangements
    • G03H1/2205—Reconstruction geometries or arrangements using downstream optical component
    • G03H2001/2207—Spatial filter, e.g. for suppressing higher diffraction orders
    • 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
    • G03H2001/2263—Multicoloured holobject
    • G03H2001/2271—RGB holobject
    • 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
    • G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
    • G03H1/30—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique discrete holograms only
    • G03H2001/303—Interleaved sub-holograms, e.g. three RGB sub-holograms having interleaved pixels for reconstructing coloured holobject
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2210/00—Object characteristics
    • G03H2210/10—Modulation characteristics, e.g. amplitude, phase, polarisation
    • G03H2210/13—Coloured object
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2210/00—Object characteristics
    • G03H2210/30—3D object
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2222/00—Light sources or light beam properties
    • G03H2222/10—Spectral composition
    • G03H2222/17—White light
    • G03H2222/18—RGB trichrome light

Definitions

  • the present invention relates to a color holographic wavefront printer, and more particularly to a method for recording a holographic wavefront for color holographic image reproduction.
  • the conventional holographic stereogram is a method of recording a plurality of two-dimensional orientation images in a holographic recording medium, which is similar to the super multi-view display or integrated imaging method proposed in the related art. But differs in that it records on a holographic recording medium having a high spatial resolution.
  • this method has problems such as visual fatigue and image distortion caused by the lens in the conventional binocular based 3D stereoscopic display, and provides a distorted image in the depth direction. It has a disadvantage that it is difficult to reproduce the 3D image.
  • a method of reducing the holographic interference pattern of a three-dimensional object and recording it on a holographic recording medium is a thin hologram and has no color selectivity. This difficulty is difficult.
  • the holographic wavefront printer is a method of solving the above problems, and is a method of recording a wavefront of a three-dimensional virtual object similar to an analog hologram.
  • the recording of wavefront makes it possible to reproduce a perfect three-dimensional object, and it has the advantage that color reproduction is possible because of recording by volume hologram method using a reference wave.
  • the wavefront printing method first generates a digital holographic interference pattern (digital hologram) in accordance with the size of the holographic recording medium from a point cloud including position information and color amplitude information about a three-dimensional object.
  • the generated interference pattern is divided according to the size of the spatial light modulator, the divided interference pattern is displayed by the spatial light modulator, and the wavefront diffracted by the plane wave incident on the spatial light modulator is reduced by the reduction optical system so that the element hologram ( are recorded sequentially on the hologram recording medium in a minimum unit called an elemental hologram.
  • each element hologram is recorded in a single color among red, green, and blue, and each element hologram must be small enough so that the viewer does not recognize the divided color because three element holograms are recognized as one color hologram.
  • high resolution spatial light modulators must be used, and the optical reduction is clearly limited and thus the hologram observed when creating an element hologram that is not sufficiently small in size results in a mosaic or tiling effect. There is a problem in that discontinuous color holograms are observed.
  • the present invention has been made to solve the above problems, and an object of the present invention is to provide a holographic wavefront recording apparatus and method for seamless color holographic image reproduction.
  • the color holographic wavefront printer, the holographic fringe pattern generated according to the size of the holographic recording medium is divided into a holographic fringe pattern to fit the size of the spatial light modulator.
  • the light modulator displays only one color part at a time.
  • the color of the displayed color parts may be sequentially changed in the light modulator, and the incident wave incident on the light modulator may be sequentially changed in the same manner as the color change.
  • color portions may not be located on the side, top and bottom of the same color portion.
  • the number of color parts constituting a part of the holographic fringe pattern may be a multiple of color.
  • the number of colors may be three, and a part of the holographic fringe pattern may be divided into nine color parts.
  • the number and size of the element holograms constituting the holographic fringe pattern may be inversely proportional to the amount of information and resolution that can be expressed by an apparatus displaying the holographic fringe pattern.
  • the optical filter unit transmits only the first diffraction component in the diffracted wave-field emitted from the light modulator, and other non-diffracted waves and -1st order diffracted components. All high diffraction components, including waves, can be blocked.
  • the color holographic printer is located between the optical modulator and the optical filter unit, the first to focus the diffracted wavefront emitted from the optical modulator to the optical filter unit lens; And a second lens positioned between the optical filter unit and the holographic recording medium, the second lens aligning the diffracted wavefront transmitted through the optical filter unit and incident the corresponding portion of the holographic recording medium.
  • the color holographic printing method according to another embodiment of the present invention, the element hologram which is part of the holographic fringe pattern, and diffracted when the incident wave is incident; And separating a portion of the diffracted wavefront and transferring the portion to the holographic recording medium, wherein the portion of the holographic fringe pattern is divided into different color portions, and at one point in time to the light modulating portion, Only one color part is displayed on the screen.
  • one holographic interference pattern is subdivided so that the subdivided interference pattern is diffracted by each laser light source to record color holograms in the holographic recording medium.
  • the degree more natural and vivid color holographic recording is possible.
  • the color holographic printer is able to provide realistic and continuous color holography while maintaining the size of the element hologram as compared with the conventional method because each color light source is incident on one holographic interference pattern.
  • FIG. 1 is a view provided in the description of a holographic printer according to an embodiment of the present invention.
  • FIG. 2 is a diagram schematically illustrating a concept in which the holographic wavefront is sequentially recorded in the holographic recording medium in elemental hologram units by a holographic wavefront printer;
  • FIG. 3 is a diagram schematically illustrating a concept of sequentially recording element holograms in a holographic recording medium when a color hologram is manufactured using a conventional holographic wavefront printer;
  • FIG. 4 is a concept of sequentially / partly recording element holograms on a holographic recording medium by synchronizing subdivided and diffracted wavefronts to a color light source for natural and vivid color holographic recording according to an embodiment of the present invention.
  • FIG. 5 is a diagram schematically illustrating a concept in which each divided holographic fringe pattern is recorded while being sequentially displayed in a spatial light modulator for recording color holographic wavefronts according to an exemplary embodiment of the present invention.
  • the holographic wavefront printer is a device for recording the first diffracted wave-front generated by the holographic fringe pattern in the holographic emulsion 150.
  • a holographic wavefront printer that performs such a function includes a spatial light modulator (SLM) 110, a lens-1 (L1) 120, and a band pass filter (BPF). 130 and lens-2 (L2) 140.
  • SLM spatial light modulator
  • L1 lens-1
  • BPF band pass filter
  • L2 lens-2
  • the SLM 110 is an optical modulation element, and the lens-1 120 concentrates the diffracted wavefront emitted from the SLM 110 on the BPF 130.
  • the BPF 130 is an optical filter element that separates some components of the diffracted wavefront incident from the SLM 110 through the lens-1 120.
  • Lens-2 140 aligns the diffracted wavefront passing through BPF 130 and enters holographic recording medium 150.
  • the computer 10 is a device for generating a holographic fringe pattern.
  • the computer 10 generates a holographic fringe pattern for three-dimensional modeling information about a three-dimensional virtual object or a real object generated by a computer graphics model.
  • the holographic fringe pattern generated by the computer 10 is divided into NxN, so that (1,1), (1,2), ..., (1, N), (2,1), ..., The (N, N) portions are delivered to the SLM 110 sequentially.
  • the incident wave (Illumination Wave) is incident on the SLM 110 and the diffraction wavefront is reduced by the lens-1 (120) and the lens-2 (140) consisting of a telecentric lens system holographically Delivered to a specific area of the recording medium 150.
  • the wavefront diffracted by the holographic fringe pattern 20 divided in FIG. 2 is shown in the holographic recording medium.
  • the diffracted wavefront transmits only the first diffraction component by a BPF (not shown) located between the lens-1 120 and the lens-2 140, and the non diffracted wave.
  • a BPF not shown
  • -1st order diffracted wave and higher order diffraction components are blocked.
  • the non-diffraction component, -first-order diffraction component, and higher-order diffraction component are blocked and only the first-order diffraction component passes / reduces the diffracted wavefront to be transmitted to the holographic recording medium 150, which is incident on the holographic recording medium 150
  • This interference pattern is recorded in the holographic recording medium 150 by causing interference with the reference wave.
  • the holographic interference pattern recorded on the holographic recording medium 150 is called an elemental hologram because it is an interference pattern for a specific part rather than the whole object.
  • the number of element holograms is inversely proportional to the amount of information that the device displaying the holographic fringe pattern can express, and the size of the element holograms is inversely proportional to the resolution of the completed hologram. That is, the larger the number of element holograms, the higher quality holograms can be reproduced, and the smaller the size of element holograms, the finished holograms can reproduce smooth and seamless images.
  • the divided holographic fringe patterns 20 are further divided according to colors and sequentially transmitted to the SLM 110, and the wavefront diffracted by the synchronized light source is alone. Recorded in the graphic recording medium 150 to record a clear hologram that is seamless.
  • the fringe pattern 20 is further divided into nine parts from the divided (1, 1) to the (N, N) parts.
  • the existing scheme does not divide as shown in FIG.
  • the number of divisions may be determined as a multiple of the color to be implemented.
  • the element hologram is divided into nine equal parts to express three colors of red, green, and blue, and light sources of red, green, and blue are incident on the divided nine equalized areas.
  • the color arrangement was such that there was no repetition or overlap of the same color as shown in FIG. That is, the color parts are not located on the side, top and bottom of the same color part.
  • the arrangement shown in FIG. 4 is exemplary and can be changed to other various arrangements as necessary (eg, to avoid Moire patterns).
  • FIG. 5 is a diagram illustrating a method of sequentially recording the divided holographic wavefront 20 shown in FIG. 4.
  • the (1, 1) element hologram is divided into nine equal parts to determine the arrangement according to three light sources of red, green, and blue.
  • the red portion of the (1, 1) element hologram is displayed on the SLM 110 and the red light source is incident, the wavefront diffracted by the lens-1 120, the BPF 130 and the lens-2 140 is It is recorded in the (1, 1) portion of the holographic recording medium 150.
  • the (1, 1) element hologram is divided into three times and recorded in the holographic recording medium 150, and then (1, 2), (1, 3), ..., (N, N) element holograms Similarly, it is divided into three times and recorded sequentially.

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

Abstract

La présente invention concerne un dispositif d'enregistrement de front d'onde holographique et un procédé de reproduction d'images holographiques en couleur sans discontinuité. Une imprimante de front d'onde holographique en couleur, selon un mode de réalisation de la présente invention, comprend : une unité de modulation de lumière qui affiche une partie d'un motif de franges holographiques sur un modulateur de lumière spatial et génère un front d'onde diffracté par une onde plane incidente sur le modulateur de lumière spatial ; et une unité de filtrage optique qui sépare une partie du front d'onde diffracté sorti de l'unité de modulation de lumière afin de délivrer la partie séparée à un support d'enregistrement holographique, des hologrammes élémentaires étant classés respectivement par des parties colorées différentes et l'unité de modulation de lumière affichant un seul type de partie colorée à un instant dans le temps. Par conséquent, un motif d'interférences fragmenté par fragmentation d'un hologramme élémentaire est diffracté par chaque source de lumière laser, et ainsi il est possible d'enregistrer un hologramme en couleur sur un support d'enregistrement holographique et il est possible de réaliser un enregistrement holographique plus naturel et avec des couleurs plus claires selon un degré de fragmentation.
PCT/KR2014/010944 2014-01-17 2014-11-14 Dispositif d'enregistrement de front d'onde holographique et procédé de reproduction d'images holographiques en couleur sans discontinuité WO2015108272A1 (fr)

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KR10-2014-0005859 2014-01-17
KR1020140005859A KR101558235B1 (ko) 2014-01-17 2014-01-17 끊김없는 컬러 홀로그래픽 영상 재생을 위한 홀로그래픽 파면 기록 장치 및 방법

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106647210A (zh) * 2017-01-19 2017-05-10 中国人民解放军装甲兵工程学院 全息单元打印的空程误差消除方法
CN108958000A (zh) * 2018-09-17 2018-12-07 电子科技大学 一种基于分类学习与二分法的光学扫描全息自聚焦方法
GB2572219A (en) * 2018-03-23 2019-09-25 De La Rue Int Ltd Methods of manufacturing diffractive optical devices
CN114859679A (zh) * 2022-04-19 2022-08-05 华中科技大学 一种全息波前打印系统及方法

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Publication number Priority date Publication date Assignee Title
JPH0679194A (ja) * 1992-06-19 1994-03-22 Teac Corp 空気清浄装置
KR20120063160A (ko) * 2010-12-07 2012-06-15 삼성전자주식회사 다시점 3차원 디스플레이 장치
KR20130022081A (ko) * 2011-08-24 2013-03-06 삼성전자주식회사 홀로그래픽 3차원 영상의 프린팅 방법
KR20130022082A (ko) * 2011-08-24 2013-03-06 삼성전자주식회사 홀로그래픽 3차원 프린팅 장치 및 그 구동방법

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0679194A (ja) * 1992-06-19 1994-03-22 Teac Corp 空気清浄装置
KR20120063160A (ko) * 2010-12-07 2012-06-15 삼성전자주식회사 다시점 3차원 디스플레이 장치
KR20130022081A (ko) * 2011-08-24 2013-03-06 삼성전자주식회사 홀로그래픽 3차원 영상의 프린팅 방법
KR20130022082A (ko) * 2011-08-24 2013-03-06 삼성전자주식회사 홀로그래픽 3차원 프린팅 장치 및 그 구동방법

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106647210A (zh) * 2017-01-19 2017-05-10 中国人民解放军装甲兵工程学院 全息单元打印的空程误差消除方法
CN106647210B (zh) * 2017-01-19 2019-07-19 中国人民解放军装甲兵工程学院 全息单元打印的空程误差消除方法
GB2572219A (en) * 2018-03-23 2019-09-25 De La Rue Int Ltd Methods of manufacturing diffractive optical devices
CN108958000A (zh) * 2018-09-17 2018-12-07 电子科技大学 一种基于分类学习与二分法的光学扫描全息自聚焦方法
CN114859679A (zh) * 2022-04-19 2022-08-05 华中科技大学 一种全息波前打印系统及方法
CN114859679B (zh) * 2022-04-19 2022-12-20 华中科技大学 一种全息波前打印系统及方法
WO2023202020A1 (fr) * 2022-04-19 2023-10-26 华中科技大学 Système et procédé d'impression de front d'onde holographique

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