WO2016106471A1 - 一种全像影像记录与全像影像重建方法 - Google Patents

一种全像影像记录与全像影像重建方法 Download PDF

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Publication number
WO2016106471A1
WO2016106471A1 PCT/CN2014/001190 CN2014001190W WO2016106471A1 WO 2016106471 A1 WO2016106471 A1 WO 2016106471A1 CN 2014001190 W CN2014001190 W CN 2014001190W WO 2016106471 A1 WO2016106471 A1 WO 2016106471A1
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Prior art keywords
holographic
image
light
holographic image
optical path
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English (en)
French (fr)
Inventor
林志雄
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Inn Valley Technology Inc
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Inn Valley Technology Inc
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Priority to JP2017534722A priority Critical patent/JP2018508028A/ja
Priority to US15/114,315 priority patent/US10254713B2/en
Priority to EP14909284.3A priority patent/EP3242296A4/en
Priority to PCT/CN2014/001190 priority patent/WO2016106471A1/zh
Publication of WO2016106471A1 publication Critical patent/WO2016106471A1/zh
Anticipated expiration legal-status Critical
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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
    • G03H1/10—Processes or apparatus for producing holograms using modulated reference beam
    • G03H1/14—Temporal modulation, e.g. extending depth of field or phase compensation for object motion
    • 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
    • G03H1/041—Optical element in the object space affecting the object beam, not otherwise provided for
    • 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
    • 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
    • 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
    • G03H1/2286—Particular reconstruction light ; Beam properties
    • 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
    • G03H1/268—Holographic stereogram
    • 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
    • G03H1/28—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique superimposed holograms only
    • 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
    • G03H2001/0421—Parallax aspect
    • G03H2001/0426—Extended parallax, e.g. panoramic or 360deg. 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
    • G03H1/0402—Recording geometries or arrangements
    • G03H2001/0428—Image holography, i.e. an image of the object or holobject is recorded
    • 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
    • G03H2001/0471—Object light being transmitted through the object, e.g. illumination through living cells
    • 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
    • G03H2001/2234—Transmission 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
    • G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
    • G03H1/2645—Multiplexing processes, e.g. aperture, shift, or wavefront multiplexing
    • G03H2001/267—Polarisation multiplexing
    • 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
    • G03H1/268—Holographic stereogram
    • G03H2001/2695—Dedicated printer
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2210/00—Object characteristics
    • G03H2210/20—2D object
    • G03H2210/22—2D SLM object wherein the object beam is formed of the light modulated by the SLM
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2210/00—Object characteristics
    • G03H2210/40—Synthetic representation, i.e. digital or optical object decomposition
    • G03H2210/42—Synthetic representation, i.e. digital or optical object decomposition from real object, e.g. using 3D scanner
    • 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
    • G03H2222/31—Polarised light
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2223/00—Optical components
    • G03H2223/22—Polariser
    • 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
    • G03H2227/03—Means for moving one component

Definitions

  • the invention relates to an image recording and image reconstruction method, in particular to a holographic image recording and holographic image reconstruction method.
  • the basic principle of optical holographic film production is as follows: First, an image capturing device such as a CCD camera is used to capture an image of an object on a storage platform. At the same time, a light-emitting device such as a laser is used to emit a dimming light to a light splitting module, which divides the same light into object light and reference light. The object light is transmitted along the objective optical path, and the image captured by the image capturing device is transmitted and transmitted to the holographic film. In addition, the reference light is reflected along the reference optical path to the holographic film. Then, the object light and the reference light are simultaneously irradiated onto the holographic film to generate optical interference to form a plurality of light and dark interference fringe images. The exposed holographic film is washed to form a composite hologram of the image of the object. For this composite hologram, a three-dimensional image of the object can be visualized by projecting the reference light as a reconstructed light source thereon.
  • the present invention provides a holographic image recording and holographic image reconstruction method by removing two image polarizing plates in an optical path structure to remove image distortion and "fence effect". Recording more accurate optical hologram images on the full-image film, and reducing the size of the recorded full-image image, and generating a larger-sized reconstructed image to enhance the reconstructed image brightness and improve the quality and observability of the reconstructed holographic image. .
  • the object of the present invention is to provide a holographic image recording and holographic image reconstruction method.
  • the image capturing device fixedly aligns the rotating target object to take a 360-degree image and the 360-degree image.
  • Transmitting to the liquid crystal display panel at the same time, by arranging two optical polarizing plates in the optical path structure, between each exposure, rotating the polarization direction of the object light and the reference light by a small angle, and then repeating the exposure recording in the whole On the negative film, until 360 degrees of image information of the object is recorded on the holographic film to complete the shooting and recording of the holographic image of the target object.
  • the present invention provides a holographic image recording method that is implemented by a holographic image capturing and recording apparatus that includes a holographic image capturing device and a holographic image recording device.
  • the holographic image capturing device comprises an image capturing device and a rotating platform.
  • the holographic image recording device comprises a light emitting unit, a first mirror, a beam splitter, a first polarizer, a second mirror, a display panel, a holographic film, a second polarizer and a third Reflector.
  • the holographic image recording method includes the steps of: photographing a target object placed on a rotating platform rotating at a fixed speed using an image capturing device, and transmitting the captured image to the display panel via an online; using the light emitting unit Transmitting a coherent beam to the first mirror; the first mirror receives the coherent beam and reflects it to the beam splitter; the beam splitter reflects the coherent beam along a second optical path (reference optical path) to the second polarizer (Thus it becomes reference light); the second polarizer polarizes the coherent beam into polarized light and transmits it to the third mirror; the third mirror reflects the polarized light along the second optical path onto the holographic film.
  • the spectroscope transmits the coherent beam and transmits it along a first optical path (object optical path) to the first polarizer (and thus becomes object light); the first polarizer polarizes the same dimming into polarized light. And transmitting to the second mirror; the second mirror reflects the polarized light along the first optical path to the display panel, and transmits the image through the display panel, and transmits the image information thereon to the polarized light for transmission To the holographic film; and finally the object light from the first optical path interferes with the reference light from the second optical path, and is affixed on the holographic film to form a holographic image.
  • the present invention also provides a holographic image reconstruction method, which passes a holographic image reconstruction device
  • Implementation of the holographic image reconstruction device includes a light bulb and a polarizer.
  • the polarizer is disposed between the bulb and a holographic film having a recorded holographic image on the hologram.
  • the holographic image reconstruction method includes the steps of: emitting light from the bulb, illuminating the holographic film from below via a polarizer; the polarizer rotating at a fixed speed, polarizing light from the bulb to change a polarization direction of the light;
  • the holographic film is illuminated by polarized light having a change in polarization direction to reconstruct a holographic image of the object.
  • the present invention reconstructs images recorded at various angles using the above method, and presents a suspended and enlarged two-dimensional image above the holographic film.
  • the suspended and enlarged two-dimensional image is caused by the persistence of the human eye, so that the image of the object at various angles is understood as a three-dimensional holographic image in the brain perception of the surrounding viewer.
  • FIG. 1 is a schematic diagram of a holographic image capturing and recording apparatus used in a holographic image recording method according to an embodiment of the present invention
  • FIGS. 2a, 2b, 2c are schematic diagrams of recording a holographic image on a holographic film using polarized light and polarized reference light, in accordance with an embodiment of the present invention
  • FIG. 3 is a flow chart showing the steps of a holographic image recording method according to an embodiment of the present invention.
  • FIGS. 4a, 4b, and 4c are schematic diagrams of reconstructing a holographic image on a holographic film using a holographic image reconstruction device in accordance with an embodiment of the present invention
  • FIG. 5 is a flow chart showing the steps of a holographic image reconstruction method according to an embodiment of the invention.
  • FIG. 1 there is shown a schematic diagram of a holographic image capturing and recording apparatus used in a holographic image recording method according to an embodiment of the present invention. That is, the present invention provides a holographic image recording and holographic image reconstruction method by which the holographic image capturing and recording apparatus is implemented.
  • the hologram imaging and recording apparatus 100 includes a hologram imaging apparatus 110 and a hologram recording apparatus 120.
  • the holographic image capturing device 110 includes an image capturing device 111 and a rotating platform 112.
  • the holographic image recording device 120 includes a light emitting unit 121, a first mirror 122, a beam splitter 123, a first polarizing film 124, a second mirror 125, a display panel 126, and a hologram 129.
  • the holographic image capturing and recording device provided by the invention can be applied to various holographic image recording systems, for example, can be used for recording holographic images in a rainbow hologram, a reflective hologram, a multi-view hologram, and a true The color full picture or the integrated full picture, etc., but the invention is not limited thereto.
  • the target object 113 is placed on the rotating platform 112 and rotated 360 degrees at the set fixed speed, and the image capturing device 111 is fixedly disposed and aligned with the target object. 113. Therefore, when the rotating platform 112 is rotated 360 degrees at a fixed speed, the image capturing device 111 can capture an image of the target object at 360 degrees. The image is presented thereon via an inline connection to display panel 126.
  • the illumination unit 121 emits the coherent light to the first mirror 122, and the mirror 122 receives the same dimming light and reflects it to the beam splitter 123.
  • the beam splitter 123 reflects a portion of the same dimming light to the second polarizing plate 127 as reference light, which is polarized by the second polarizing plate 127 and then transmitted to the third mirror 128, which reflects the light to the hologram negative film 129. .
  • the optical path from the beam splitter 123 to the hologram 129 via the third mirror 128 is the second optical path P2 (also referred to as a reference optical path) having a path length d2.
  • the dichroic mirror 123 while the dichroic mirror 123 reflects the same dimming light to the polarizing plate 127, the dichroic mirror 123 transmits the same dimming light to the first polarizing plate 124 through the transmission, and transmits the polarized light after being polarized.
  • the polarized light is reflected to the display panel 126, and the image information on the display panel 126 is transmitted to the holographic film 129 through the polarized light carrier, thereby interfering with the reference light to form a whole Like an image.
  • the optical path from the beam splitter 123 to the hologram 129 via the second mirror 125 is referred to as a first optical path P1 (also referred to as an object optical path) having a path length d1.
  • the first polarizing plate 124 and the second polarizing plate 127 may each be a stepping motor (figure Drive not shown, synchronously rotating at the same angular velocity.
  • the reference optical path length d2 from the beam splitter 123 to the hologram 129 is equal to the length of the object optical path d1 from the beam splitter 123 to the hologram 129.
  • the light emitting unit 121 can be a gas laser emitter, a carbon dioxide laser emitter, a liquid laser emitter, a solid state laser emitter or a semiconductor laser emitter, but the invention is not limited thereto. this.
  • the coherent light can be a visible light or an invisible light.
  • the image capturing device 111 can be a CCD camera.
  • the display panel 126 can be a liquid crystal display panel.
  • FIG. 2a a schematic diagram of recording a holographic image on a holographic film using polarized light and polarized reference light in accordance with an embodiment of the present invention.
  • the polarized light generated by the polarization of the two polarizing plates is
  • the hologram 210 is caused to generate an interference fringe pattern to form a holographic image and recorded on the hologram 210 to record the image capturing device 111 on the target object 113.
  • the image film 210 is formed with an interference fringe pattern to form a holographic image and recorded on the hologram film 210 to record an image taken by the image capturing device 111 when the target object 113 is rotated by 2° (ie, the right side thereof). Further, as shown in Fig.
  • L1 indicates that the image on the left side of the photographic target object 113 is recorded at L1 of the hologram 210 when both the polarization directions of the object light and the reference light are 1°.
  • R2 indicates that when the polarization directions of the object light and the reference light are both 2°, the image on the right side of the object 113 to be photographed is recorded at R2 of the hologram 210.
  • L3 indicates that when the polarization directions of the object light and the reference light are both 3°, the image on the left side of the object 113 to be photographed is recorded at L3 of the hologram 210.
  • the polarization direction of the object light and the reference light is rotated by a small angle, and then the exposure is repeatedly recorded on the hologram 210 until the 360-degree image information of the object is recorded on the hologram 210. So far, the shooting and recording of the hologram image of the target object 113 is completed.
  • the holographic image recording method is implemented by a holographic image capturing and recording device, and includes a holographic image capturing device 110 including an image capturing device 111 and a rotating platform 112; And a holographic image recording device 120, comprising a light emitting unit 121, a first mirror 122, a beam splitter 123, a first polarizing film 124, a second mirror 125, a display panel 126, and a hologram A negative film 129, a second polarizing plate 127, and a third reflecting mirror 128.
  • the method 300 includes The following steps: using the image capturing device 111 to photograph a target object 113 placed on the rotating platform 112 rotating at a fixed speed, and transmitting the captured image to the display panel 126 via the line (step 310); Using the illumination unit 121 to emit a coherent beam to the first mirror 122 (step 320); the first mirror 122 receives the coherent beam and reflects it to the beam splitter 123 (step 330); the beam splitter 123 will The coherent beam is reflected along a second optical path P2 (reference optical path) to the second polarizer 127 (and thus becomes reference light) (step 340); the second polarizer 127 polarizes the coherent beam into polarized light And transmitting to the third mirror 128 (step 350); the third mirror 128 reflects the polarized light along the second optical path P2 onto the hologram 129 (step 360); the beam splitter 123 Transmitting the coherent beam and transmitting it along the first optical path P1 (object optical path) to the first polarizer 124 (
  • the first polarizing plate 124 and the second polarizing plate 127 are rotated by 360 degrees at the same speed by a motor (not shown).
  • the first optical path P1 is the same length as the second optical path P2.
  • the rotating platform 112 is rotated by 360 degrees by a motor.
  • the present invention also provides a holographic image reconstruction method.
  • 4a, 4b, and 4c are schematic diagrams of reconstructing a holographic image on a holographic film using a holographic image reconstruction device in accordance with an embodiment of the present invention.
  • the holographic image reconstruction device 400 includes a light bulb 410, such as an LED light, and a polarizing plate 420. This polarizing plate 420 is placed between the bulb 410 and the hologram negative film 430.
  • light bulb 410 is used to emit light, which is illuminated from below hologram 430 while rotating polarizer 420.
  • a holographic image taken at different angles can be illuminated.
  • the polarization direction of the polarized light is 1°
  • the image on the left side of the recorded object is illuminated.
  • the polarization direction of the polarized light is 2°
  • the image on the right side of the recorded object is illuminated.
  • L1 shows that when the polarization direction of the polarized light is 1°, the left image of the recorded object is illuminated; at R2, when the polarization direction of the polarized light is 2°, the right image of the recorded object is illuminated; When L3 shows that the polarization direction of the polarized light is 3°, the image on the left side of the recorded object is illuminated.
  • the polarizing plate 420 rotates, the polarization direction of the polarized light changes until the 360-degree image information of the captured object is reconstructed to complete the reconstruction of the holographic image of the object.
  • the rotational speed of the polarizing plate 420 is accelerated by more than 42 Hz, the image of the object photographed at each angle is simultaneously present in the viewer's mind due to the persistence of the vision.
  • the reconstructed holographic image is displayed as a magnified image that appears on the holographic film.
  • the brain automatically interprets these reconstructed 2D images as a 3D stereo holographic image to reconstruct the holographic image.
  • FIG. 5 it is a flow chart of steps of a holographic image reconstruction method according to an embodiment of the present invention.
  • the holographic image reconstruction method is implemented by a holographic image reconstruction device.
  • the holographic image reconstruction device includes a bulb 410 and a polarizer 420.
  • the polarizer 420 is disposed on the bulb 410.
  • the holographic film has a holographic image
  • the method 500 includes the steps of: emitting light using the bulb 410, illuminating the holographic film 430 from below (step 510); the polarizer 420 is fixed The speed is rotated to polarize the light emitted by the bulb 410 to change the polarization direction of the light (step 520); and the polarized light with the polarization direction illuminates the holographic film 430 to reconstruct a holographic image of the object, which has The recorded images are taken at various angles to present a suspended and magnified two-dimensional image over the holographic film 430 (step 530).
  • the suspended and magnified two-dimensional image is caused by the persistence of the human eye, so that the image of the object at various angles is interpreted by the viewer's brain as a three-dimensional holographic image.
  • the polarizing plate 420 can be rotated by 360 degrees at a fixed speed by a motor (not shown).
  • the bulb 410 can be an LED light or an incandescent light.
  • the holographic image recording and holographic image reconstruction methods provided by the present invention can overcome the defects and shortcomings in the prior art by using a polarizing plate in the optical imaging recording and reconstruction path, thereby achieving the following advantages:
  • the present invention has the effects that cannot be achieved by the prior art, conforms to the patent requirements, and has patent value.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Holo Graphy (AREA)
  • Stereoscopic And Panoramic Photography (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

本发明有关一种全像影像记录方法，其通过一全像影像摄影与记录装置实施，其包括以下步骤：使用一影像撷取装置对以固定速度旋转的旋转平台上所置的一目标物体摄影，并将所摄得影像经由联机传送至一显示面板上；使用一发光单元发射一同调光束至一反射镜，其将同调光束反射至一分光镜；该分光镜将该同调光束分开沿着一第一光学路径与一第二光学路径分别将物光与参考光传送至该全像底片上互相干涉形成全像影像。本发明亦有关一种全像影像重建方法，其通过全像影像重建装置实施，在全像底片上重建以形成悬浮且放大的三维影像。

Description

一种全像影像记录与全像影像重建方法 技术领域
本发明涉及一种影像记录与影像重建方法，特别是涉及一种全像影像记录与全像影像重建方法。
背景技术
光学全像片(holographic film)制作的基本原理为：首先，使用由一影像撷取装置例如CCD摄影机，以撷取一置物平台上物体的影像。同时使用一发光装置例如激光所发射一道同调光至一分光模块，其将该同调光分成物光(object light)与参考光(reference light)。其中，此物光沿着物光光学路径，将影像撷取装置所撷取影像透射且传送至全像底片上。此外，参考光沿着参考光光学路径，经反射而射至全像底片上。然后，物光与参考光同时照射至全像底片上产生光学干涉，以形成许多明暗的干涉条纹(interference fringe)影像。此经曝光后的全像底片经冲洗后为记录物体影像的复合全像片。对此复合全像片只要以参考光为重建光源投射于其上，即可显现物体的三维立体影像。
传统式复合全像术包括圆柱型与圆锥型，在成像记录时必须弯折全像底片，或于影像重建时必须弯折全像底片成圆柱状或圆锥状。故，以此方式所重建的物体影像会变形(distortion)而不完美。又，为改善此种现象，有人使用圆盘型复合全像术。但是，不论圆柱型、圆锥型还是圆盘型，均必须使用圆柱透镜，其所制作出的复合全像片为一狭长扇形的小复合全像片，而观看者所观看的重建影像是由许多小复合全像片所组合重建而成的，以至于会产生像差。此外，所产生重建影像会有一条条栅栏重叠于其上，即所谓“栅栏效应”，使得所观看到的影像质量不佳。
此外，即使使用圆盘型复合全像术，由于成像时仍然须要重复曝光，以至于重建影像亮度不足且清晰度不佳，无法将所记录影像尺寸作得尽量小(例如用于防伪标签)，其应用受到限制。故，此种圆盘型复合全像术所产生影像仍不理想。
因此，目前光学全像片的记录与重建技术仍有许多缺失与缺点，实有进一步改进的必要。
发明内容
为了解决上述现有技术中的缺失与缺点，本发明提供一种全像影像记录与全像影像重建方法，其通过在光路架构中设置两个光学偏振片，以去除影像变形与“栅栏效应”，在全像片上记录更精确的光学全像影像，且可缩小所记录全像片的尺寸，并产生较大尺寸的重建影像，以增强重建影像亮度，改善重建全像影像的质量与可观性。
本发明的目的为提供一种全像影像记录与全像影像重建方法，当目标物体在旋转平台上旋转时，影像撷取装置固定对准此旋转目标物体拍摄360度影像并将该360度影像传送至液晶显示面板，与此同时，通过在光路架构中设置两个光学偏振片，其在每次曝光之间，将物光与参考光的偏振方向旋转一个小角度，然后重复曝光记录在全像底片上，一直至物体360度影像信息均被记录于全像底片上为止，以完成该目标物体的全像影像的拍摄与记录。
本发明提供一种全像影像记录方法，其通过一全像影像摄影与记录装置实施，该全像影像摄影与记录装置包括一全像影像摄影装置与一全像影像记录装置。其中，全像影像摄影装置包含一影像撷取装置与一旋转平台。全像影像记录装置包含一发光单元、一第一反射镜、一分光镜、一第一偏振片、一第二反射镜、一显示面板、一全像底片、一第二偏振片以及一第三反射镜。此全像影像记录方法包括以下步骤：使用影像撷取装置对以固定速度旋转的旋转平台上所置的一目标物体摄影，并将所摄得影像经由联机传送至该显示面板上；使用发光单元发射一同调光束至第一反射镜；第一反射镜接收同调光束，并将其反射至分光镜；分光镜将同调光束沿着一第二光学路径(参考光光学路径)反射至第二偏振片(从而成为参考光)；第二偏振片将同调光束偏振成偏振光，并传送至第三反射镜；第三反射镜将偏振光沿着该第二光学路径反射至全像底片上。于此同时，分光镜将该同调光束透射并沿着一第一光学路径(物光光学路径)传送至第一偏振片(从而成为物光)；第一偏振片将同调光偏振成偏振光并传送至第二反射镜；第二反射镜将该偏振光沿着第一光学路径反射至该显示面板上，并透射通过此显示面板，将其上所具影像信息承载于偏振光中而传送至全像底片上；以及最后来自第一光学路径的物光与来自第二光学路径的参考光彼此干涉，在该全像底片上平贴以形成一全像影像。
此外，本发明还提供一种全像影像重建方法，其通过一全像影像重建装置 实施，该全像影像重建装置包括一灯泡与一偏振片。该偏振片设于该灯泡与一全像底片之间，该全像底片上具有所记录的全像影像。此全像影像重建方法包括以下步骤：该灯泡发出光线，经由偏振片由下方照射该全像底片；该偏振片以固定速度旋转，将由该灯泡发出光线偏振，以改变该光线的偏振方向；以及以偏振方向变化的偏振光线照射该全像底片，以重建物体的全像影像。
本发明使用以上方式重建以各角度所拍摄记录的影像，在该全像底片上方呈现悬浮且放大的二维影像。该悬浮且放大的二维影像由于人眼的视觉暂留作用，致使在周围观看者大脑认知中，将此所呈现各个角度的物体影像理解为三维立体全像影像。
本发明的特点与优点为，使用两束相同偏振方向的物光与参考光，同时照射于全像底片上曝光，可以制作出较小尺寸的全像片(可小于1cm x 1cm)。此外，由于本发明在光学成像路径中使用偏振片，免除了传统式圆盘型复合全像术所使用的圆柱透镜，故不会造成影像变形，同时可消除“栅栏效应”。又，在影像重建时，可以在较高的高度呈现较大尺寸的悬浮二维影像，以提供360度影像给围绕四周观看者观赏。
附图说明
图1为根据本发明实施例的全像影像记录方法所使用的全像影像摄影与记录装置的概要图；
图2a、2b、2c为根据本发明实施例的使用经偏振物光与偏振参考光将全像影像记录于全像底片上的概要图；
图3为根据本发明实施例的全像影像记录方法的步骤流程图；
图4a、4b、以及4c为根据本发明实施例的使用全像影像重建装置将全像底片上全像影像重建的概要图；
图5为根据本发明实施例的全像影像重建方法的步骤流程图。
附图标记说明：100-全像影像摄影与记录装置；110-全像影像摄影装置；111-影像撷取装置；112-旋转平台；113-目标物体；120-全像影像记录装置；121-发光单元；122-第一反射镜；123-分光镜；124-第一偏振片；125-第二反射镜；126-显示面板；127-第二偏振片；128-第三反射镜；129-全像底片；210-全像底片；410-灯泡；420-偏振片；430-全像底片；P1-第一光学路径；P2-第二光学路径。
具体实施方式
为使贵审查委员方便了解本发明的内容及所能达成的功效，兹配合图式列举具体实施例，详细说明如下：
首先，参考图1，其为根据本发明实施例的全像影像记录方法所使用全像影像摄影与记录装置的概要图。即，本发明提供一种全像影像记录与全像影像重建方法，其通过该全像影像摄影与记录装置实施。此全像影像摄影与记录装置100包括一全像影像摄影装置110与一全像影像记录装置120。其中，此全像影像摄影装置110包含一影像撷取装置111以及一旋转平台112。此全像影像记录装置120包含一发光单元121、一第一反射镜122、一分光镜123、一第一偏振片124、一第二反射镜125、一显示面板126、一全像底片129、一第二偏振片127、以及一第三反射镜128。
本发明提供的全像影像摄影与记录装置，可以应用于各种全像影像记录系统，例如可用于将全像影像记录于彩虹全像片、反射式全像片、多视角全像片、真彩全像片或是积体式全像片等上，但本发明并不受限于此。
在执行本发明提供的全像影像记录方法时，首先，将目标物体113置于旋转平台112上以所设定的固定速度旋转360度，此影像撷取装置111固定设置并对准该目标物体113。因此，当旋转平台112以固定速度旋转360度时，此影像撷取装置111可摄得该目标物体360度的影像。该影像经由联机连接至显示面板126而呈现于其上。于此同时，此发光单元121将同调光线发射至第一反射镜122，反射镜122接收该同调光并将其反射至分光镜123。该分光镜123将该同调光的一部分反射至第二偏振片127作为参考光，其经第二偏振片127偏振后再传送至第三反射镜128，其将该光线反射至全像底片129。上述由分光镜123经由第三反射镜128至全像底片129的光学路径为第二光学路径P2(亦称为参考光光学路径)，其路径长度为d2。
在本实施例中，在该分光镜123将同调光反射至偏振片127的同时，该分光镜123将同调光经透射而传送至第一偏振片124，经其偏振后将偏振光传送至第二反射镜125，其将偏振光反射至显示面板126，将显示面板126上所具有的影像信息通过偏振光承载而传送至全像底片129上，从而与参考光互相干涉，以形成全像影像。上述由分光镜123经由第二反射镜125至全像底片129的光学路径称第一光学路径P1(亦称为物光光学路径)，其路径长度为d1。
在以上说明中，第一偏振片124与第二偏振片127可各由一步进式马达(图 中未显示)驱动，以相同角速度同步旋转。此外，此由分光镜123至全像底片129的参考光光学路径长度d2与由分光镜123至全像底片129的物光光学路径d1长度相等。
在本实施例中，此发光单元121可以为一气体激光发射器、一二氧化碳激光发射器、一液态激光发射器、一固态激光发射器或一半导体激光发射器，但本发明并不受限于此。又，在本实施例中，该同调光可以为一可见光或一不可见光。影像撷取装置111可以为一CCD摄影机。另，该显示面板126可以为液晶显示面板。
其次，参考图2a至图2c，其显示根据本发明实施例的使用偏振物光与偏振参考光将全像影像记录于全像底片上的概要图。如同于图2a所示，由于图1中的第一偏振片124与第二偏振片127均以步进式马达带动以相同角速度同步旋转，故经由该两偏振片偏振所产生的偏振物光与偏振参考光的偏振方向皆为1°时，其抵达该全像底片210产生干涉条纹图案，以形成全像影像而记录于全像底片210上，以记录此影像撷取装置111于目标物体113旋转1°时(即其左侧)所拍摄的影像。然后，如同于图2b所示，以相同原理，当经由第一偏振片124与第二偏振片127偏振所产生的偏振物光与偏振参考光的偏振方向皆为2°时，其抵达该全像底片210产生干涉条纹图案，以形成全像影像而记录于全像底片210上，以记录此影像撷取装置111于目标物体113旋转2°时(即其右侧)所拍摄的影像。再者，如同于图2c所示，如同以上说明，L1表示在物光与参考光的偏振方向皆为1°时，在全像底片210的L1处记录所拍摄目标物体113左侧的影像。R2表示在物光与参考光的偏振方向皆为2°时，在全像底片210的R2处记录所拍摄目标物体113右侧的影像。L3表示在物光与参考光的偏振方向皆为3°时，在全像底片210的L3处记录所拍摄目标物体113左侧的影像。因此，在每次曝光之间，将物光与参考光的偏振方向旋转一个小角度，然后重复曝光记录在全像底片210上，一直至物体360度影像信息均被记录于全像底片210上为止，以完成该目标物体113的全像影像的拍摄与记录。
然后，参考图3，其显示为根据本发明实施例的全像影像记录方法的步骤流程图。如同于图3所示，此全像影像记录方法，其通过一全像影像摄影与记录装置实施，其包括一全像影像摄影装置110，其包含一影像撷取装置111与一旋转平台112；以及一全像影像记录装置120，其包含一发光单元121、一第一反射镜122、一分光镜123、一第一偏振片124、一第二反射镜125、一显示面板 126、一全像底片129、一第二偏振片127以及一第三反射镜128。该方法300包括
Figure PCTCN2014001190-appb-000001
以下步骤：使用影像撷取装置111对以固定速度旋转的该旋转平台112上所置的一目标物体113摄影，并将所摄得的影像经由联机传送至该显示面板126上(步骤310)；使用发光单元121发射一同调光束至该第一反射镜122(步骤320)；该第一反射镜122接收该同调光束，并将其反射至该分光镜123(步骤330)；该分光镜123将该同调光束沿着一第二光学路径P2(参考光光学路径)反射至该第二偏振片127(从而成为参考光)(步骤340)；该第二偏振片127将该同调光束偏振成偏振光，并传送至该第三反射镜128(步骤350)；该第三反射镜128将该偏振光沿着该第二光学路径P2反射至该全像底片129上(步骤360)；该分光镜123将该同调光束透射并沿着一第一光学路P1(物光光学路径)传送至该第一偏振片124(从而成为物光)(步骤370)；该第一偏振片124将该同调光偏振成偏振光并传送至该第二反射镜125(步骤380)；该第二反射镜125将该偏振光沿着该第一光学路径P1反射至该显示面板126上，并透射且通过该显示面板126，将其所含影像信息承载于该偏振光中从而传送至该全像底片129上(步骤390)；以及来自该第一光学路径P1的物光与来自该第二光学路径P2的参考光彼此干涉，在该全像底片129上形成一全像影像(步骤395)。
在以上说明中，第一偏振片124与第二偏振片127由马达(图中未显示)带动以相同速度同步旋转360度。第一光学路径P1与该第二光学路径P2的长度相同。旋转平台112由马达带动旋转360度。
此外，本发明亦提供一种全像影像重建方法。参考图4a、图4b、以及图4c，其均为根据本发明实施例的使用全像影像重建装置将全像底片上全像影像重建的概要图。如同图4a中所示，此全像影像重建装置400包括：一灯泡410，其例如为LED灯；以及一偏振片420。此偏振片420置于灯泡410与全像底片430之间。在实际操作时，使用灯泡410发射光线，从全像底片430下方对其照射，同时旋转偏振片420。随着偏振片420旋转可使得偏振光的偏振方向改变，可照射出不同角度所拍摄的全像影像。在图4a中方向朝上箭头显示，当偏振光偏振方向为1°时，照射所记录物体左侧影像。在图4b中方向朝上箭头显示，当偏振光偏振方向为2°时，照射所记录物体右侧影像。在图4c中L1处显示，当偏振光偏振方向为1°时，照射所记录物体左侧影像；R2处显示，当偏振光偏振方向为2°时，照射所记录物体右侧影像；以及当L3处显示偏振光偏振方向为3°时，照射所记录物体左侧影像。
如此，随着偏振片420旋转，使得偏振光的偏振方向改变，一直至所拍摄物体360度影像信息均被重建为止，以完成该物体的全像影像的重建。当偏振片420旋转速度加快超过42Hz时，由于视觉暂留作用，会使得各个角度所拍摄物体影像同时存在于观看者的脑海中。此所重建的全像影像显示为浮现于全像底片上而呈现放大尺寸影像。大脑会将此等重建的二维影像自动理解为一个三维的立体全像影像，以完成全像影像的重建。
参考图5，其为根据本发明实施例的全像影像重建方法的步骤流程图。如同图5所示，此种全像影像重建方法，其通过一全像影像重建装置实施，该全像影像重建装置包括一灯泡410与一偏振片420，该偏振片420设于该灯泡410与一全像底片430之间，该全像底片上具有全像影像，该方法500包括以下步骤：使用灯泡410发射光线，由下方照射该全像底片430(步骤510)；该偏振片420以固定速度旋转，将由该灯泡410所发射光线偏振，以改变该光线的偏振方向(步骤520)；以及以偏振方向变化的偏振光线照射该全像底片430，以重建物体的全像影像，其具有以各角度所拍摄记录的影像，以便在该全像底片430上方呈现悬浮且放大的二维影像(步骤530)。该悬浮且放大的二维影像由于人眼的视觉暂留作用，致使在观看者大脑会将此所呈现各个角度的物体影像理解为三维立体全像影像。
在以上说明中，该偏振片420可由一马达(图中未显示)带动以固定速度旋转360度。该灯泡410可以为一LED灯或一白炽灯。
综上所述，本发明提供的全像影像记录与全像影像重建方法通过在光学成像记录与重建路径中使用偏振片，可以克服现有技术中的缺失与缺点，从而达成以下优点，极具产业上使用价值：
本发明的特点与优点为，使用两束相同偏振方向的物光与参考光，同时照射于全像底片上曝光，可以制作出较小尺寸的全像片(可小于1cm x 1cm)。此外，由于本发明在光学成像路径中使用偏振片，并不使用传统式圆盘型复合全像术所用的圆柱透镜，故不会造成影像变形，同时可消“栅栏效应”。又，在影像重建时，可以在较高高度呈现放大尺寸的悬浮二维影像，其显示为三维立体影像，以提供360度影像给围绕四周观看者观赏。
故，本发明具有现有技术所无法达成的功效，符合专利要件，且具专利价值。
以上说明内容仅为本发明的一较佳实施例，其并非用来限定本发明实施的 范围，故举凡依本发明申请专利范围所述的形状、构造、材质、特征及精神所为的等同变化与修饰，均应包括于本发明的保护范围内。

Claims (10)

  1. 一种全像影像记录方法，其通过一全像影像摄影与记录装置实施，该全像影像摄影与记录装置包括：一全像影像摄影装置，其包含一影像撷取装置与一旋转平台；以及一全像影像记录装置，其包含一发光单元、一第一反射镜、一分光镜、一第一偏振片、一第二反射镜、一显示面板、一全像底片、一第二偏振片以及一第三反射镜；其特征在于，该方法包括以下步骤：
    使用该影像撷取装置对以固定速度旋转的该旋转平台上所置的一目标物体摄影，并将所摄得影像经由联机传送至该显示面板上；
    使用该发光单元发射一同调光束至该第一反射镜；
    该第一反射镜接收该同调光束，并将其反射至该分光镜；
    该分光镜将该同调光束沿着一第二光学路径反射至该第二偏振片；
    该第二偏振片将该同调光束偏振成偏振光，并传送至该第三反射镜；
    该第三反射镜将该偏振光沿着该第二光学路径反射至该全像底片上；
    该分光镜将该同调光束透射并沿着一第一光学路径传送至该第一偏振片；
    该第一偏振片将该同调光偏振成偏振光并传送至该第二反射镜；
    该第二反射镜将该偏振光沿着该第一光学路径反射至该显示面板上，并透射且通过该显示面板，将其所含影像信息承载于该偏振光中而传送至该全像底片上；以及
    来自该第一光学路径的物光与来自该第二光学路径的参考光彼此干涉，在该全像底片上形成一全像影像。
  2. 如权利要求1所述的全像影像记录方法，其中该第一偏振片与该第二偏振片由步进式马达带动，以相同速度同步旋转360度。
  3. 如权利要求1所述的全像影像记录方法，其中该第一光学路径的长度与该第二光学路径的长度相等。
  4. 如权利要求1所述的全像影像记录方法，其中该旋转平台由步进式马达带动旋转360度。
  5. 如权利要求1所述的全像影像记录方法，其中该影像撷取装置为一CCD摄影机。
  6. 如权利要求1所述的全像影像记录方法，其中该显示面板为一液晶显示面板。
  7. 一种全像影像重建方法，其通过一全像影像重建装置实施，该全像影像重建装置包括一灯泡与一偏振片，该偏振片设于该灯泡与一全像底片之间，该全像底片上具有全像影像，其特征在于，该方法包括以下步骤：
    使用该灯泡发射光线，由下方照射该全像底片；
    该偏振片以固定速度旋转，将由该灯泡发射光线偏振，以改变该光线的偏振方向；以及
    以偏振方向变化的偏振光线照射该全像底片，以重建物体的全像影像，其具有以各角度所拍摄记录的影像，以便在该全像底片上方呈现悬浮且放大的二维影像。
  8. 如权利要求7所述的全像影像重建方法，其中该偏振片旋转速度超过42Hz，此时该悬浮且放大的二维影像由于人眼的视觉暂留作用，致使观看者大脑将此所呈现各个角度的物体影像理解为三维立体全像影像。
  9. 如权利要求7所述的全像影像重建方法，其中该偏振片可由一步进式马达带动以固定速度旋转360度。
  10. 如权利要求7所述的全像影像重建方法，其中该灯泡为一LED灯或一白炽灯。
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