WO2023003091A1 - Procédé de duplication d'hologramme en couleur de grande surface - Google Patents

Procédé de duplication d'hologramme en couleur de grande surface Download PDF

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Publication number
WO2023003091A1
WO2023003091A1 PCT/KR2021/016443 KR2021016443W WO2023003091A1 WO 2023003091 A1 WO2023003091 A1 WO 2023003091A1 KR 2021016443 W KR2021016443 W KR 2021016443W WO 2023003091 A1 WO2023003091 A1 WO 2023003091A1
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WO
WIPO (PCT)
Prior art keywords
hologram
recording medium
master
hologram recording
replication
Prior art date
Application number
PCT/KR2021/016443
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English (en)
Korean (ko)
Inventor
신동학
오용석
김재홍
정종성
박재우
임명진
Original Assignee
주식회사 홀로랩
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Publication of WO2023003091A1 publication Critical patent/WO2023003091A1/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
    • G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
    • G03H1/0276—Replicating a master hologram without interference recording
    • 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
    • G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
    • 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
    • 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
    • G03H2222/34—Multiple light sources

Definitions

  • the present invention relates to a method for replicating a large-area color hologram, and more particularly, since the master hologram is placed using a Z-axis moving stage so that the hologram recording medium and the master hologram come into close contact with each other, accurate replication is possible, and the master hologram And since the hologram recording medium is arranged horizontally and the replication beam (or reference beam) is configured so that it is incident from the upper direction to the lower direction, it is possible to quickly reduce rotational vibration and other vibrations of the cross section by gravity, and the XY stage A large-area color hologram copying method capable of completing large-area copying by performing MxN small-area copying by performing small-area copying using a tiling technique while moving a hologram recording medium in a horizontal direction using a hologram recording medium.
  • a master hologram is an original hologram that has content to be copied.
  • Hologram recording medium is a photosensitive material that creates a hologram by being exposed to light or laser light. It is an object that becomes a cloned hologram after the cloning process is over.
  • the cloning hologram is the result of cloning work. A copy of the master hologram. The original content is transferred to the hologram recording medium.
  • Holography refers to a technology of recording and reproducing three-dimensional information using the interference of light caused by two laser beams meeting each other, and a hologram refers to a photograph taken with the technology.
  • Holography can provide a perfect three-dimensional image and is used in various applications such as anti-counterfeiting of credit cards, anti-counterfeiting of software, anti-counterfeiting of banknotes or documents, optical communication, and hologram art.
  • HOE holographic optical elements
  • Holographic technology is expected to be applied to a wider range of applications in the future.
  • hologram production and replication technology is essential because mass production and dissemination of holograms are required in the future.
  • Replicating a hologram means transferring interference information stored in a master hologram (original hologram) to a recording medium.
  • a hologram is copied by simultaneously irradiating a master hologram and a recording medium with coherent light (usually a laser beam).
  • a photosensitive recording medium such as photopolymer or silver halide is mainly used as a recording medium.
  • hologram replication is performed.
  • a collimated beam or a spherical wave close to the collimated beam is mainly used as the replica beam.
  • Claim 1 Consisting of a light source unit (10), a duplication unit (20), and a moving unit (30), a spatial multiplex beam in which several beams are arranged in a space instead of a single beam is used as a reference beam so that the radiator is applied to the coated object.
  • a hologram duplication system characterized by duplicating is disclosed.
  • a hologram recording device is disclosed in Registered Patent Publication No. 10-1942975.
  • the hologram replication structure is related to the structure in which the master hologram is produced, and is largely classified into a transmissive type and a reflective type.
  • the transmissive type the transmissive type
  • the reflective type the arrangement order of the recording medium and the master hologram is reversed based on the incident beam (reference beam or replica beam).
  • the incident beam In the transmissive type, the incident beam first passes through the master hologram and then encounters the recording medium, whereas in the reflective type, the incident beam passes through the recording medium first and then encounters the master hologram.
  • hologram duplication technology can be classified into an adhesive type and a non-adhesive type according to the distance or attachment state between the master hologram and the hologram recording medium.
  • the distance between the master hologram and the recording medium greatly affects the quality of the duplicate hologram, which is the result of hologram duplication.
  • the attachable cloning technology inevitably increases the overall cloning time, and requires a large number of master holograms to reduce the time.
  • the adhesive cloning method can be applied to small or small area cloning, but it is not suitable for large scale or large scale cloning.
  • the master hologram and the hologram recording medium In the case of the non-adhesive copying method, the master hologram and the hologram recording medium
  • the copying is repeatedly performed by moving the hologram recording medium.
  • the master hologram and the hologram recording medium are arranged vertically when constructing the duplication system, there is rotational vibration acting in the direction of the cross section of the master hologram or hologram recording medium.
  • the rotational vibration is large, and the vibration reduction time is also long.
  • the reflection type hologram replication is mainly described, but the same can be applied to the transmission type master hologram replication by changing the position of the master hologram and the recording medium.
  • the present invention intends to suggest a method to solve this problem.
  • the present invention intends to propose a method capable of quickly reducing rotational vibration and other vibrations of the cross section of a recording medium.
  • the present invention relates to a large-area color hologram replication system, comprising: a light source unit comprising a laser, a lens, a mirror, and an optical shutter to form a reference beam and a replication beam;
  • a beam relay unit composed of mirrors, structures, and appendages
  • a recording medium moving unit composed of a hologram recording medium, an xy-axis moving stage, and accessories;
  • a master moving unit composed of a master hologram and a z-axis moving stage
  • the present invention relates to a large-area color hologram replication method
  • Steps of exposing the replication beam to the recording medium (1,1) and performing replication :
  • the master hologram After the hologram recording medium (1,1) is moved to the copy position by the XY-axis moving stage in the state where the optical shutter is blocked, the master hologram is raised by the Z-axis moving stage and adheres to the hologram recording medium (1,1). characterized by being
  • the present invention arranges the master hologram using the Z-axis moving stage so that the hologram recording medium and the master hologram are in close contact with each other, accurate replication is possible, the master hologram and the hologram recording medium are horizontally arranged, and the copy beam ( Or, since the reference beam) is configured to be incident from the upper direction to the lower direction, it is possible to quickly reduce rotational vibration and other vibrations of the cross section by gravity, and tiling (while moving the hologram recording medium in the horizontal direction using the XY stage) There is a remarkable effect of completing large-area replication by performing small-area replication by performing MxN rounds of small-area replication by performing small-area replication using the tiling technique.
  • 1 is a basic structure of hologram replication. (a) transmissive hologram, (b) reflective hologram, (c) enlarged side view of reflective structure
  • Figure 2 is a hologram replication structure diagram ⁇ (a) attached type, (b) non-adhesive type>
  • FIG. 5 is a flow chart of a hologram replication process according to the method of the present invention
  • Figure 6a is an optical configuration diagram of the system of the present invention. (a) top view
  • Figure 6b is an optical configuration diagram of the system of the present invention. (b) side view
  • beam relay unit 20 light source unit
  • FIG. 3 shows a block diagram of the system of the present invention
  • the system of the present invention includes a light source unit configured of a laser, a lens, a mirror, an optical shutter, etc. to form a reference beam (replicated beam);
  • a beam relay unit composed of mirrors, structures, accessories, and the like;
  • a recording medium moving unit composed of a hologram recording medium, an xy-axis moving stage, and accessories;
  • a master moving unit composed of a master hologram, a z-axis moving stage, and the like;
  • a controller for controlling the xy-axis moving stage, the z-axis moving stage, and the optical shutter
  • a parallel beam or a spherical wave beam can be used as an incident beam (or a duplicate beam), and the use of a parallel beam will be described as a basic premise.
  • the RGB laser light source is converged through an optical element such as a mirror to form a single laser beam.
  • the combined RGB light source passes through a shutter, is converted into a plane wave by two lenses, and is directed to a hologram recording medium.
  • Several mirrors and auxiliary structures are used in the middle to illuminate from upward to downward.
  • the master hologram and hologram recording medium are arranged in a horizontal direction, and since the master hologram and hologram recording medium are film-type materials, they are usually attached or fixed to a transparent plate (glass, acrylic, etc.).
  • a diffraction beam (acting as an object beam) is generated in the master hologram, and a new hologram identical to the master hologram is recorded (replicated) on the hologram recording medium.
  • the distance between the master hologram and the hologram recording medium is slightly increased, and then the tiling technique is applied, which moves the hologram recording medium connected to the XY-axis moving stage and repeats replication. As a result, large-area replication is achieved. it becomes possible
  • the number of tiling is determined according to the size (or area) of the master hologram.
  • the quality can be lowered, and the smaller the size of the master hologram is, the better the clone quality is, but the number of tilings increases.
  • the present invention can also be applied to transmission type hologram replication if the positions of the master hologram and the recording medium are exchanged and the optical configuration is changed accordingly.
  • the master hologram is raised by the Z-axis moving stage and adheres to the hologram recording medium (1,1). do.
  • the optical shutter is opened, laser light is irradiated to the hologram recording medium (1,1) and the master hologram, hologram replication of the (1,1) area is performed, and the optical shutter is closed when the exposure time is over.
  • the master hologram descends and is separated from the hologram recording medium (1,1).
  • the glass plate is moved by one space, and the hologram recording medium (1, 2) is moved to the copy position.
  • the master hologram rises and adheres to the hologram recording medium (1, 2).
  • Figure 6 shows the optical configuration of the system of the present invention
  • Figure 6 (a) is a top view
  • Figure 6 (b) is a side view seen from the side.
  • Three laser beams (R, G, B) are mixed into one beam by an optical element (mirror, dichroic mirror, etc.) to generate a color beam.
  • an optical element mirror, dichroic mirror, etc.
  • One RGB light source passes through the shutter and removes miscellaneous light through two lenses and a spatial filter.
  • the color beam is converted into a parallel beam through two lenses and a spatial filter, and transmitted to the hologram recording medium through several mirrors.
  • Replication is performed while the duplicate beam (reference beam) and the diffraction beam (signal beam) diffracted from the master hologram form an interference pattern in the hologram recording medium.
  • the master hologram and the hologram recording medium must be in close contact.
  • the Z-axis moving stage operates to separate the master hologram from the recording medium, and the XY-axis moving stage operates to move the hologram recording medium (1,2) to the exposure point. to place
  • the opening and closing of the optical shutter and the driving of the Z-axis moving stage and the XY-axis moving stage are automatically controlled by the computer of the control unit.
  • a multi-layered structure in which mirrors can be installed is designed to be disposed around the hologram recording medium so that the copy beam is irradiated from the top to the bottom of the recording medium.
  • the incidence angle of the copy beam incident on the hologram recording medium can be changed.
  • FIG. 8 is a picture of a master hologram used in a replication experiment using the system of the present invention.
  • 8(a) and 8(b) are images of the master hologram observed when irradiating white light and green laser light, respectively.
  • FIG. 9 is a photograph of the results of a replication experiment using the replication system of the present invention.
  • 9(a) is a photograph reproduced with a green laser light of a duplicate hologram (1,1).
  • 9(b) is a photograph of a holographic image observed when a projection image is projected onto a 30-inch class large-area hologram (holographic screen) manufactured by a tiling method.

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

Abstract

La présente invention concerne un système de duplication d'hologramme en couleur de grande surface qui comprend : une unité de source de lumière comprenant un laser, une lentille, un miroir et un obturateur optique de façon à former un faisceau de référence et un faisceau dupliqué ; une unité de relais de faisceau comprenant un miroir, une structure et des auxiliaires ; une unité de déplacement de support d'enregistrement comprenant un support d'enregistrement d'hologramme, une platine de déplacement d'axes xy et des auxiliaires ; une unité de déplacement maître comprenant un hologramme maître et une platine de déplacement d'axe z ; et une unité de commande servant à commander la platine de déplacement d'axes xy, la platine de déplacement d'axe z et l'obturateur optique. De plus, la présente invention concerne un procédé de duplication d'hologramme en couleur de grande surface qui comprend les étapes consistant à : élever un HM pour qu'il soit en contact étroit avec (1,1) ; exposer un faisceau dupliqué au support d'enregistrement d'hologramme (1,1) et le dupliquer ; abaisser un hologramme maître pour le séparer du support d'enregistrement d'hologramme (1,1) ; déplacer une plaque de verre de façon à ce qu'un support d'enregistrement d'hologramme (1,2) soit déplacé vers une position dupliquée ; et élever l'hologramme maître de façon à ce qu'il soit en contact étroit avec le support d'enregistrement d'hologramme (1,2). La présente invention utilise la platine de déplacement d'axe z pour positionner l'hologramme maître de façon à ce que les supports d'enregistrement d'hologramme et l'hologramme maître soient en contact étroit les uns avec les autres, ce qui permet l'exécution d'une duplication adéquate, elle dispose l'hologramme maître et les supports d'enregistrement d'hologramme de façon horizontale et permet qu'un faisceau dupliqué (ou un faisceau de référence) soit incident de haut en bas, ce qui permet de réduire rapidement les vibrations de rotation et autres vibrations dans la section provoquées par la gravité, et elle effectue une duplication de petite surface M x N fois en utilisant une technique de pavage tout en déplaçant horizontalement le support d'enregistrement d'hologramme au moyen des platines d'axe xy, et elle a ainsi pour effet remarquable de permettre la réalisation d'une duplication de grande surface.
PCT/KR2021/016443 2021-07-23 2021-11-11 Procédé de duplication d'hologramme en couleur de grande surface WO2023003091A1 (fr)

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Application Number Priority Date Filing Date Title
KR1020210097267A KR20230015747A (ko) 2021-07-23 2021-07-23 대면적 컬러 홀로그램 복제 방법
KR10-2021-0097267 2021-07-23

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140126029A1 (en) * 2011-06-06 2014-05-08 Seereal Technologies S.A. Method and device for the layered production of thin volume grid stacks, and beam combiner for a holographic display
KR20140115168A (ko) * 2013-03-20 2014-09-30 삼성전자주식회사 홀로그램 기록 방법 및 장치
KR20180096632A (ko) * 2015-12-22 2018-08-29 코베스트로 도이칠란트 아게 기재-안내된 재구성 빔으로 부피 반사 홀로그램을 산업적으로 생산하기 위한 장치 및 방법
KR20180113403A (ko) * 2017-04-06 2018-10-16 한국전자통신연구원 디지털 컬러 홀로그램 생성 방법 및 장치, 그리고 타일링을 이용한 디지털 컬러 홀로그래픽 디스플레이 장치
KR20200051193A (ko) * 2018-11-05 2020-05-13 주식회사 미래기술연구소 이음매 없는 대면적 홀로그램 마스터 제작 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140126029A1 (en) * 2011-06-06 2014-05-08 Seereal Technologies S.A. Method and device for the layered production of thin volume grid stacks, and beam combiner for a holographic display
KR20140115168A (ko) * 2013-03-20 2014-09-30 삼성전자주식회사 홀로그램 기록 방법 및 장치
KR20180096632A (ko) * 2015-12-22 2018-08-29 코베스트로 도이칠란트 아게 기재-안내된 재구성 빔으로 부피 반사 홀로그램을 산업적으로 생산하기 위한 장치 및 방법
KR20180113403A (ko) * 2017-04-06 2018-10-16 한국전자통신연구원 디지털 컬러 홀로그램 생성 방법 및 장치, 그리고 타일링을 이용한 디지털 컬러 홀로그래픽 디스플레이 장치
KR20200051193A (ko) * 2018-11-05 2020-05-13 주식회사 미래기술연구소 이음매 없는 대면적 홀로그램 마스터 제작 방법

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