JP4963477B2 - Electronic holographic stereoscopic video playback device - Google Patents

Description

  The present invention relates to an electronic holographic stereoscopic video reproduction apparatus that reproduces a subject as a stereoscopic video by electronic holography.

  In general, when an electronic holographic image is captured and displayed as a stereoscopic image, a reduced image of the subject is formed by a lens that captures the subject, and a large number of minute lenses (element lenses) are arranged for the light emitted from the reduced image. A large number of minute images (element images) obtained through the lens array (element lens group) obtained are taken as integrated images. Next, the light emitted from the photographed integrated image is again passed through the element lens group to reproduce a reduced image at the time of photographing, and information on the amplitude and phase of the light emitted from the reduced image is obtained as interference fringes with the reference light. A method for reproducing images by electronic holography is known, in which the interference fringes obtained by calculation are displayed on a display such as a liquid crystal display, and the display is irradiated with laser light as reference light to reproduce a reduced image at the time of shooting. (Non-Patent Document 1).

Tomoyuki Mishina and five others "Study on real-life input electronic holography using integral photography hologram transformation", 3D Image Conference 2007, No. 1 1-4, July 12, 2007 (distributed on the day of the CD)

However, the conventional electronic holography video playback method has the following problems.
The conventional electronic holographic image playback method technology reproduces a reduced-projected subject image, not the subject itself. In particular, the farther the subject is from the photographic lens, the smaller the size and depth of the reproduced image. There is a problem that the video with the same size and depth as the subject cannot be reproduced.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide an electronic holographic stereoscopic video reproduction device in which the size of a reproduced image is not reduced when a reproduced image of a subject is displayed. To do.

  In order to achieve the above object, the electronic holographic stereoscopic video reproduction device according to the present invention has the following configuration. That is, an electronic holographic stereoscopic video reproduction device includes a photographing lens for photographing a subject, and an information acquisition hologram generating means for generating interference fringes representing the phase and amplitude of light emitted from a subject image formed through the photographing lens. The hologram display means for displaying the hologram generated by the information acquisition hologram generation means, the light irradiation means for irradiating readout light to the hologram displayed by the hologram display means, and the readout light of the light irradiation means A reproducing lens that forms a reproduced image through the diffracted light of the hologram, and a light-shielding plate that is disposed at a focal point of the reproducing lens and blocks half of the diffracted light. The distance to the object image formed by the hologram display and the object covered by the hologram displayed by the hologram display means. Distance combining the distance from the body image to the reproduction lens has a configuration that is set so that the distance of the sum of the focal length of the focal length and the reproducing lens of the taking lens.

  The electronic holographic stereoscopic video reproduction device configured as described above generates interference fringes representing the phase and amplitude of light emitted from the subject image through the photographing lens by the information acquisition hologram generation means. Then, the electronic holographic stereoscopic video reproduction apparatus displays the generated interference fringes by the hologram display means, and irradiates the readout light by the light irradiation means to form diffracted light to form a reproduction image of the subject by the reproduction lens. The electronic holographic 3D image reproduction device has a light shielding plate at the focal point of the reproduction lens in the optical path between the reproduction lens and the reproduction image. In addition, since the photographic lens and the reproduction lens are installed at positions separated from the sum of their focal lengths, the reproduced image is a large image that is equal to or larger than the original subject. Can be played.

In the case of the above-described configuration, the electronic holographic stereoscopic video reproduction device may be configured such that the photographing lens and the reproduction lens form a relay lens having the same focal length.
With this configuration, the electronic holographic stereoscopic video reproduction device can reproduce a reproduction image having the same size and the same depth as the subject.

The electronic holographic stereoscopic video reproduction device may be configured such that the reproduction lens is a lens having a focal length longer than a focal length of the photographing lens or a lens having a focal length shorter than the focal length of the photographing lens. .
With this configuration, the electronic holographic stereoscopic video reproduction device can reproduce a small subject in an enlarged manner, or can enlarge and reproduce a far subject.

  Furthermore, in the electronic holographic stereoscopic video reproduction device, the information acquisition hologram generation unit irradiates the subject with coherent light, and also uses reference light irradiation unit as reference light, and reference light from the reference light irradiation unit, It is good also as a structure provided with the interference fringe imaging means which images the interference fringe obtained by overlapping with the light from the to-be-photographed object image which passed through the said imaging lens.

  With this configuration, the electronic holographic stereoscopic video reproduction device irradiates the subject with coherent light by the reference light irradiation unit, and interferes with the reflected light and the reference light from the reference light irradiation unit. A hologram that is an interference fringe can be obtained by imaging the fringe imaging means.

  In the electronic holographic stereoscopic video reproduction device, the information acquisition hologram generating means includes an element lens group in which element lenses that transmit light emitted from a subject image through the photographing lens to form an element image are arranged in an array. Imaging means for capturing an integrated image of element images obtained through the element lens group as stereoscopic video information, and calculating interference fringes indicating the phase and amplitude of light of the subject image from the stereoscopic video information captured by the imaging means. And a hologram generation means to be obtained.

  With this configuration, the electronic holography stereoscopic video reproduction device captures a subject as an element image by an element lens group in which element lenses are aligned via a photographing lens, and an integrated image of the element images is captured as stereoscopic image information. Imaging means. Then, the electronic holographic stereoscopic video reproduction apparatus can calculate the interference fringes indicating the phase and amplitude of the light emitted from the subject image from the stereoscopic video information imaged by the imaging means by the hologram generation means.

  In the electronic holographic stereoscopic video reproduction device, the information acquisition hologram generation unit acquires a plane image imaging unit that acquires a subject image as a plane image via the imaging lens, and acquires a plane image of the plane image imaging unit. At the same time, distance image acquisition means for acquiring depth information of the planar image as a distance image indicating the distance to the subject obtained via the photographing lens or another photographing lens, and the distance acquired by the distance image acquisition means Interference fringes indicating the phase and amplitude of the light of the subject image are generated from the stereoscopic video information generated by matching the image with the planar image captured by the planar image capturing means and the subject and the depth information of the subject. It is good also as a structure provided with the hologram production | generation means calculated | required by calculating.

  With this configuration, the electronic holography stereoscopic video reproduction device matches the planar video of the subject imaged by the planar imaging unit with the distance image of the subject acquired by the distance image acquisition unit to obtain stereoscopic video information, Interference fringes can be calculated from the stereoscopic image information by the hologram generating means and generated as a hologram of the subject.

  In the electronic holographic stereoscopic video reproduction device, the information acquisition hologram generating means generates R holograms, G holograms, and B holograms corresponding to RGB from the stereoscopic video information, and the hologram display means The R hologram, the G hologram, and the B hologram are displayed, and the reproduction lens is disposed in the optical path of each of the R hologram, the G hologram, and the B hologram corresponding to RGB. In addition, a configuration may be adopted in which a reflecting mirror and a half mirror are provided so as to display the reproduced image of the subject by superimposing the light passing through each of the reproducing lenses.

  With this configuration, the electronic holographic stereoscopic video reproduction apparatus can reproduce a color reproduction image of a subject having the same size as or larger than the subject.

  Further, the electronic holographic stereoscopic video reproduction device receives data of the hologram from an imaging device that generates an interference fringe representing a phase and amplitude of light emitted from a subject image of a subject displayed through a photographing lens, and the hologram In an electronic holographic stereoscopic video reproduction apparatus that reproduces the reproduced image of the subject by displaying the hologram, a hologram display means for displaying the hologram, a light irradiation means for irradiating the hologram displayed by the hologram display means with readout light, A reproducing lens that forms a reproduced image through the diffracted light of the hologram output by the reading light of the light irradiating means, a light-shielding plate that is disposed at the focal position of the reproducing lens and blocks half of the diffracted light, A distance from the photographic lens to a subject image formed by the photographic lens, and The reproduction lens so that a distance that is a sum of the distance from the subject image by the hologram displayed by the program display means to the reproduction lens is the sum of the focal length of the photographing lens and the focal length of the reproduction lens It was set as the structure which installed.

  With this configuration, the electronic holographic stereoscopic video reproduction device displays the data generated by using the subject as a hologram by the hologram display means, and diffracted light via the readout light that irradiates the displayed hologram by the light irradiation means. Output as. Then, the electronic holographic stereoscopic video reproduction device shields the diffracted light that passes through the reproduction lens whose positional relationship with the photographing lens is set in advance by shielding a half area by the light shielding plate, and has the same size and the same depth as the subject. Display as a reconstructed image.

The electronic holographic stereoscopic video reproduction device according to the present invention has the following excellent effects.
Since the electronic holographic stereoscopic video reproduction device is configured such that the photographing lens and the reproduction lens are set apart from each other in the optical path from imaging to display of the subject, for example, both lenses By making the focal lengths different from each other, it is possible to display a reproduced image having the same size or more as the subject. Note that the electronic holographic stereoscopic video playback device displays a playback image having the same size and the same depth as the subject without distortion because the photographing lens and the playback lens are configured in a relay lens relationship with the same focal length. be able to.

  In addition, the electronic holographic stereoscopic video reproduction device can reproduce a small subject by enlarging a small object by using a lens having a focal length longer than the focal length of the photographing lens or a lens having a short focal length, Alternatively, a distant subject can be enlarged and reproduced.

  An electronic holographic 3D image playback device is a pair of a playback lens, which is normally required when removing unnecessary light such as conjugate light that is not required during playback by arranging a photographic lens and playback lens, and installing a light shielding plate. Thus, the output lens constituting the relay lens can be omitted and the entire apparatus can be downsized. In addition, when reproducing a color reproduction image of a subject, it is possible to realize downsizing with a configuration in which the reproduction lens and the light shielding plate are shared by RGB and the number of lenses is small.

  The electronic holographic stereoscopic video playback device acquires stereoscopic video information as interference fringes, acquires stereoscopic video information as an integrated image of element images, or uses stereoscopic video information as planar video and depth information. It can be realized with any of these methods, so it is highly versatile.

Hereinafter, an electronic holographic stereoscopic video reproduction apparatus according to the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram schematically showing the overall configuration of an electronic holographic stereoscopic video reproduction device, and FIG. 2 is a schematic diagram schematically showing the relationship between the taking lens and the reproduction lens installation position of the electronic holographic stereoscopic video reproduction device. .

  As shown in FIG. 1, the electronic holographic stereoscopic video reproduction device 1 acquires stereoscopic video information of a subject W via a photographing lens 11 and generates an information acquisition hologram generation unit 20 (stereoscopic video information acquisition unit 2). Hologram generating means 3), storage means 4 for storing the hologram generated by the information acquisition hologram generating means 20, hologram display means 6 for reading out and displaying the hologram stored by the storage means, and hologram display means 6 The light irradiation means 5 for irradiating the hologram displayed by the reading light, the reproducing lens 12 installed in the optical path of the diffracted light formed by diffracting the irradiated reading light by the hologram, and the reproducing lens A light shielding plate 7 disposed in the light path of the light that has passed through 12, a reflector disposed in the light path, and An optical system 8 is Fumira, and a.

  In this electronic holographic stereoscopic video reproduction device 1, in the optical path from the imaging to the reproduction of the subject W, the two lenses of the photographing lens 11 and the reproduction lens 12 are positioned at a distance that is the sum of the respective focal lengths. It is installed as follows. Here, as shown in FIG. 2, the photographing lens 11 and the reproducing lens 12 are set so as to be in a relay lens relationship so as to be separated by the sum of their focal lengths. Yes. That is, the distance obtained by combining the distance from the photographing lens 11 to the subject image formed by the photographing lens and the distance from the subject image by the hologram displayed by the hologram display unit 6 to the reproduction lens 12 is the distance of the photographing lens 11. It is set to be the sum of the focal length and the focal length of the reproducing lens 12. In the electronic holographic stereoscopic video reproduction device 1, the photographing lens 11 and the reproduction lens 12 are set using the same focal length.

  The information acquisition hologram generation unit 20 includes a stereoscopic video information acquisition unit 2 that acquires stereoscopic video information of the subject image from light emitted from the subject image of the subject W that is formed through the photographing lens 11, and the stereoscopic video information acquisition unit. 2 is provided with hologram generating means 3 for generating interference fringes representing the phase and amplitude of light of the subject image from the stereoscopic image information acquired from 2 as a hologram, and storage means 4 for storing the hologram generated by the hologram generating means 3. ing.

  Here, the stereoscopic video information acquisition unit 2 acquires stereoscopic video information from an integrated image of element images of the subject W. The stereoscopic image information acquisition unit 2 includes an element lens group 2b in which the element lenses 2a are arranged in a two-dimensional array, and an imaging unit 2c that captures an integrated image of the element images from the element lens group 2b as stereoscopic image information. And. In the element lens 2a, a large number of biconvex lenses or single convex lenses are arranged on the same plane. The element lens 2a has a diameter of about 1 mm and is aligned with tens of thousands (millions), and is supported by a support frame (not shown) to constitute the element lens group 2b. Further, the image pickup means 2c only needs to be able to take images from a camera or a TV camera. The element lens group 2b is installed at a position substantially away from the photographing lens 11 by its focal length, and the imaging means 2c is installed at a position where the element image group formed by the element lens group 2b can be photographed. In FIG. 2, the position of the element lens group 2 b is originally a position indicated by a dotted line, but the configuration cannot be represented by overlapping, so that the subject image, the element lens group 2 b, and the element image can be displayed. This is shown schematically.

  The hologram generating means 3 is a personal computer (hereinafter referred to as PC) that calculates and generates holograms as interference fringes representing the phase and amplitude of light from the stereoscopic video information (integrated image) acquired by the stereoscopic video information acquisition means 2. ). The hologram generating unit 3 receives the stereoscopic video information as data from the stereoscopic video information acquiring unit 2, and here, through a preset hologram calculation software, the reproduced image Wf is a color image in the same state as the subject W. Are calculated by calculating R hologram, B hologram, and G hologram. The calculated hologram data is sent to the storage means 4.

  The storage means 4 can store data such as a hard disk or an optical disk that can store images or moving images in the form of holograms. The hologram stored in the storage unit 4 is sent to the hologram display unit 6. Note that the storage unit 4 may be integrally formed as a memory of a PC that is the hologram generation unit 3.

  The hologram display means 6 displays a hologram as an image. The hologram display means 6 is formed of, for example, a liquid crystal screen, and here includes an R hologram display means 6a, a G hologram display means 6b, and a B hologram display means 6c.

  The light irradiation means 5 irradiates reading light (reference light) that is coherent light for reading a hologram, and uses, for example, a laser irradiation device that irradiates laser light. The light irradiating means 5 irradiates white, red, green, or blue laser light to cause the readout light to interfere with the interference fringes that are holograms displayed on the hologram display means 6 to form diffracted light. ing. The light irradiation means 5 is installed corresponding to the R hologram display means 6a, the G hologram display means 6b, and the B hologram display means 6c, respectively (5a, 5b, 5c).

  Here, the reproducing lens 12 is installed corresponding to the R hologram display means 6a, the G hologram display means 6b, and the B hologram display means 6c, respectively (12a, 12b, 12c). The reproduction lens 12 is set so that the distance from the hologram display means 6 is the same as the positional relationship between the subject W and the photographing lens 11. In the reproduction lens 12, the relationship between the reproduction lenses 12a, 12b, and 12c and the photographing lens 11 may be a relay lens.

  Each of the light shielding plates 7 is installed so as to block half of the diffracted light at the position where the reproduction lens 12 becomes the focal length of the readout light in the optical path from the reproduction lens 12 to the formation of the reproduction image Wf. Has been. Here, the light shielding plate 7a is disposed between the reflecting mirror 8a and the reproduced image Wf at a position where the diffracted light of the R hologram is shielded, but the position of the reproduced image Wf is at the position of the subject W. Go back and forth accordingly. Therefore, the position of the light shielding plate 7 may be a position away from the reproduction lens 12 by the focal length, and does not depend on the position of the reproduction image Wf. The light shielding plate 7b is disposed at a position where the diffracted light of the G hologram is shielded and before being reflected by the half mirror 8b. The light shielding plate 7c is disposed at a position that shields the diffracted light of the B hologram, and is located in front of the half mirror 8c. As long as this light-shielding plate 7 shields light, the light-shielding plate 7 may be formed, for example, by applying a black color that can absorb light to a shielding object such as a cloth, a film, or a plate.

  The light shielding plate 7 is disposed so that the ranges for shielding half of the diffracted light are the same at the positions of the R hologram, the G hologram, and the B hologram. That is, here, the R hologram, the G hologram, and the B hologram are installed so as to pass the upper half of the diffracted light, for example.

  Here, the optical system 8 is disposed in the optical path of the R hologram, the reflecting mirror 8a that reflects the diffracted light of the R hologram in a predetermined direction, and the optical path of the R hologram in the optical path of the G hologram. A half mirror 8b disposed at a position overlapping with the diffracted light and a half mirror 8c disposed at a position overlapping with the diffracted light of the R hologram and the G hologram in the optical path of the B hologram are provided. The position and number of the optical system 8 are not limited as long as the diffracted light of the R hologram, the diffracted light of the G hologram, and the diffracted light of the B hologram can be displayed in an overlapping manner. Absent.

Next, the operation of the electronic holographic stereoscopic video reproduction device 1 will be described.
As shown in FIG. 1, first, the electronic holography stereoscopic video reproduction device 1 converts the subject W into an element image by the element lens 2a of the stereoscopic image information acquisition unit 2 in the information acquisition hologram generation unit 20 through the photographing lens 11, The integrated image of the element images is picked up by the image pickup means 2c as stereoscopic video information. Then, by using the integrated image that is the stereoscopic video information acquired by the stereoscopic video information acquisition unit 2, the phase and amplitude of the light emitted from the subject image is calculated to generate a hologram that is an interference fringe, and the generated hologram is stored in the storage unit 4. To remember. Note that the motion of the subject W is generated as a hologram for each frame in the same manner not only when the subject W is a still image but also when the subject W is a video with motion.

  When the hologram is generated, the electronic holographic stereoscopic video reproduction device 1 sends the hologram data from the storage unit 4 to the hologram display unit 6 and displays them at the same timing (synchronized state). When a hologram is displayed, the reading light is irradiated by the light irradiating means 5, and the reading light interferes with the interference fringes that are the hologram, so that it is displayed as diffracted light.

  In the electronic holographic stereoscopic video reproduction device 1, diffracted light is generated by the hologram display means 6 (6a, 6b, 6c) and the light irradiation means 5 (5a, 5b, 5c) and is reproduced by the reproduction lens 12 (12a, 12b, 12c). Half of the diffracted light is shielded by the light shielding plates 7 (7a, 7b, 7c) in the light path, respectively, and unnecessary light that is unnecessary when reproducing the reproduced image Wf such as conjugate light is removed. The electronic holographic stereoscopic video reproduction device 1 reproduces the reproduction image Wf by forming images by superimposing the respective diffracted lights by the reflecting mirror 8a and the half mirrors 8b and 8c.

  The electronic holographic stereoscopic video reproduction device 1 displays a stereoscopic color video having the same size and the same depth as the subject W because the photographing lens 11 and the reproduction lens 12 are arranged so as to be a relay lens here. can do. In the positional relationship between the photographing lens 11 and the subject W shown in FIG. 1, when the subject W is installed at a position shorter than the focal length of the photographing lens 11, the reproduced image Wf of the subject W is observed with the light shielding plate 7. Displayed as a real image at a position between the two. In the positional relationship between the photographing lens 11 and the subject W shown in FIG. 2, when the position of the subject W is sufficiently far from the focal length of the photographing lens 11, the reproduced image Wf is a virtual image that can be seen through the reproducing lens 12. It will be recognized by the observer. Further, in FIG. 1 and FIG. 2, the hologram display means 6 is installed with the up / down / left / right directions reversed so that the reproduced image Wf is oriented in the same direction as the subject W in the up / down / left / right direction.

  The electronic holographic stereoscopic video reproduction device 1 is conveniently constructed as the imaging device A with the configuration up to the information acquisition hologram generation means 20 and as the reproduction device B with the configuration after the hologram display means 6 as a separate body. Good. In that case, the hologram data stored in the storage means 4 is transferred from the image pickup apparatus A to the reproduction apparatus B by a memory medium such as an optical disk by providing a drive 9 as indicated by a virtual line in the hologram display means 6, and the drive 9 can be realized by displaying the data of the received hologram in synchronism.

  Thus, as shown by the phantom lines in FIG. 1, even when the electronic holographic stereoscopic video reproduction device 1 is configured to be separated into the imaging device A and the reproduction device B, the photographing lens 11 and the reproduction lens 12 The reproduction lens W and the reproduction lens 12 are set apart from the sum of their focal lengths so that the reproduction image Wf of the subject W is equivalent to the size and depth of the subject W. As described above, it can be reproduced and displayed.

  Further, in the electronic holographic stereoscopic video reproduction device 1, the configuration of the information acquisition hologram generation means 20 may be configured as shown in FIGS. 3A, 3B, or 4, for example. FIGS. 3A, 3B, and 4 are schematic diagrams respectively showing another configuration of the information acquisition hologram generating means in the electronic holographic stereoscopic video reproduction device. 3 (a), 3 (b), and FIG. 4, the components already described are denoted by the same reference numerals and description thereof is omitted.

As shown in FIG. 3 (a), the information acquisition hologram generating unit 20A from the imaging lens 11 acquires depth information of the plane image capturing device 2A ₁ and the object W to obtain a plane image of an object W as a distance image distance The configuration of the stereoscopic video information acquisition unit 2A including the image acquisition unit 2A ₂ may be used.

As shown in FIG. 3A, the planar image capturing means 2A ₁ captures a planar image of the subject W on the same plane such as a normal image sensor. The distance image acquiring unit 2A ₂ irradiates light for distance measurement to the object W, depth information seeking distance to the subject W as a distance image by measuring the delay time of the light reflected back It is what. Then, the captured planar video and the distance image corresponding to the planar video are matched to obtain stereoscopic video information, and a hologram is calculated from the stereoscopic video information. The distance image acquisition means 2A ₂ arranges a plurality of photographing lenses 11a side by side (not shown), and obtains a video block in which the same subject W is reflected from among a plurality of plane images obtained by shifting the viewpoint position. A parallax amount obtained as a relative positional shift amount may be used as a parallax image, and a distance to the subject obtained from the parallax image may be acquired as depth information.

Further, as shown in FIG. 3B, the distance image acquisition unit 2A ₂ uses the photographing lens 11, and uses a half mirror and a reflecting mirror as an optical system 2B ₁ from the imaging optical path of the planar image imaging unit 2A ₁ , it may be acquired distance image using light such as infrared for distance measurement through the optical system 2B _1. In the configuration shown in FIG. 3B, the distance image may be obtained by irradiating the reference light during the vertical blanking period. In this case, visible light can be used as reference light for measuring the distance.

Furthermore, as shown in FIG. 4 refer to the information acquiring hologram generating unit 20C is that the reference light irradiating means 2C ₁ which irradiates a reference beam which is coherent light to the object W, which is illuminated by the reference light irradiating means 2C ₁ Holograms that are interference fringes of the subject due to interference between the reference light that is incident through the optical system 2 </ _b > C ₂ composed of a half mirror or a reflecting mirror and the light that is emitted from the subject image that is incident through the photographing lens 11. It is good also as a structure provided with the imaging means 2C3 which images ₃ as 3D image information. In this information acquisition hologram generation means 20C, since the hologram of the subject W has already been generated, the PC 3 simply sends 1 to the hologram data that has been sent and sends it to the storage means 4.

  Although not shown, the reproducing lens 12 may be a lens having a focal length longer than the focal length of the photographing lens 11 or a lens having a short focal length. Thus, by setting the focal length of the reproducing lens 12 to be longer than the focal length of the photographing lens 11, when the subject W is small, the reproduced image Wf can be reproduced as a large image. Further, when the reproduction lens 12 is a lens having a focal length shorter than the focal length of the photographing lens 11, the reproduction image can be enlarged when the subject W is located far away.

  As described above, in the electronic holographic stereoscopic video reproduction device 1, the means for generating the hologram is not particularly limited. Further, the light shielding range by the light shielding plate 7 has been described so that the same diffracted light range is shielded by the R hologram, the G hologram, and the B hologram, but in order to enlarge the viewing area instead of colorization. For example, when displaying holograms from different viewpoints on the hologram display means 6a, 6b, 6c, etc., it is possible to block different diffracted light ranges (for example, upper, middle and lower sides). In addition, here, a reproduction image of a color image or a color video has been described, but a reproduction image may be displayed as a single color image or a single color video.

  Furthermore, the case where the reproduced image Wf is displayed in color has been described with a configuration in which the optical paths are separated and overlapped with each other as shown in FIG. 1, for example, RGB hologram display means 6 (6a, 6b, 6c) Is output through a half mirror (not shown) or a reflecting mirror (not shown) so that the same light path is formed, and the reproduction lens 12 and the light shielding plate are in the light path where the RGB lights overlap. 7 may be installed to display the reproduced image in color.

  In the electronic holographic stereoscopic video reproduction device 1, the positions of the photographing lens 11 and the reproduction lens 12 are set to predetermined positions, and the focal length is the same or different, so that the size of the subject W is equal to or different from that. Although the playback image Wf having the above size is displayed, the playback image can be displayed smaller than the subject W. That is, the reproduced image Wf can be reproduced smaller than the subject W by adjusting the position of the subject W with respect to the focal length and disposing the focal lengths of the two lenses different from each other.

It is a schematic diagram which shows typically the whole structure of the electronic holography three-dimensional-image reproduction | regeneration apparatus concerning this invention. It is a schematic diagram which shows typically the relationship between the photographic lens of the electronic holography three-dimensional-image reproduction | regeneration apparatus which concerns on this invention, and the installation position of a reproduction | regeneration lens. (A), (b) is a schematic diagram which shows the other structure of the information acquisition hologram production | generation means in the electronic holography three-dimensional-video reproduction | regeneration apparatus based on this invention. It is a schematic diagram which shows the other structure of the information acquisition hologram production | generation means in the electronic holography three-dimensional-image reproduction | regeneration apparatus based on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electronic holography 3D image reproduction apparatus 2, 2A, 2B, 2C 3D image information acquisition means 2A ₁ Plane image imaging means 2A ₂ Distance image acquisition means 2C ₁ Reference light irradiation means 2C ₂ Optical system 2C ₃ Imaging means 2a Element lens 2b Element Lens group 2c Imaging means 3 Hologram generation means 4 Storage means 5, 5a, 5b, 5c Light irradiation means 6 Hologram display means 6a R hologram display means 6b G hologram display means 6c B hologram display means 7 Light shielding plate 7a Light shielding plate 7b Shielding plate 7c Shielding plate 8 Reflecting optical system 8a Reflecting mirror 8b Half mirror 8c Half mirror 11 Shooting lens 11a Shooting lens 12 Playback lens 12a, 12b, 12c Playback lens 20 Information acquisition hologram generation means 20A Information acquisition hologram generation means 20B Information acquisition Hologram generation means 20C Information acquisition hologram generating means W Subject Wf Reproduced image

Claims (8)

A photographic lens for photographing a subject, an information acquisition hologram generating means for generating interference fringes representing the phase and amplitude of light emitted from the subject image formed through the photographing lens, and generated by the information acquisition hologram generating means Hologram display means for displaying the hologram, light irradiation means for irradiating the hologram displayed by the hologram display means with reading light, and a reproduced image through the diffracted light of the hologram output by the reading light of the light irradiation means A reproducing lens to be formed, and a light-shielding plate arranged at the focal position of the reproducing lens to block half of the diffracted light,
The distance obtained by combining the distance from the photographing lens to the subject image formed by the photographing lens and the distance from the subject image by the hologram displayed by the hologram display unit to the reproduction lens is the focal length of the photographing lens. And an electronic holographic stereoscopic video reproduction apparatus, characterized in that the distance is set to a sum of the focal lengths of the reproduction lenses.   The electronic holographic stereoscopic video reproduction apparatus according to claim 1, wherein the photographing lens and the reproduction lens form a relay lens.   2. The electronic holographic solid according to claim 1, wherein the reproduction lens is a lens having a focal length longer than a focal length of the photographing lens or a lens having a focal length shorter than a focal length of the photographing lens. Video playback device.   The information acquisition hologram generating unit irradiates a subject with coherent light, and uses a reference light irradiating unit as a reference light and a reference light from the reference light irradiating unit from a subject image after passing through the photographing lens. 3. The electronic holographic stereoscopic video reproduction device according to claim 1, further comprising: an interference fringe imaging unit that captures an interference fringe obtained by superimposing the light with the light.   The information acquisition hologram generating means includes an element lens group in which element lenses that transmit light emitted from a subject image through the photographing lens and serve as an element image are arranged in an array, and an element image obtained through the element lens group. Image pickup means for picking up an integrated image as stereoscopic video information, and hologram generation means for calculating an interference fringe indicating the phase and amplitude of light of the subject image from the stereoscopic video information picked up by the image pickup means. The electronic holographic stereoscopic video reproduction apparatus according to claim 1 or 2, characterized in that   The information acquisition hologram generation means is a plane image imaging means for acquiring a subject image as a plane image via the photographing lens, and simultaneously with the acquisition of the plane image of the plane image imaging means, the depth information of the plane image is obtained as described above. Distance image acquisition means for acquiring as a distance image indicating the distance to the subject obtained via the imaging lens or another imaging lens, the distance image acquired by the distance image acquisition means, and the plane imaged by the planar image imaging means Hologram generation means for calculating and obtaining interference fringes indicating the phase and amplitude of light of the subject image from the stereoscopic video information generated by matching the video and the subject and the depth information of the subject. The electronic holographic stereoscopic video reproduction device according to claim 1, further comprising: The information acquisition hologram generation means generates R holograms, G holograms, and B holograms corresponding to RGB from the stereoscopic image information,
The hologram display means displays the R hologram, the G hologram, and the B hologram,
The reproduction lens is arranged in each optical path of the R hologram, the G hologram, and the B hologram corresponding to RGB,
3. The electronic holographic stereoscopic image according to claim 1, wherein a reflecting mirror and a half mirror are provided so as to display a reproduced image of the subject by superimposing light that has passed through each of the reproducing lenses. Playback device. Data of the hologram is received from an imaging device that generates interference fringes representing the phase and amplitude of light emitted from the subject image of the subject displayed through the photographing lens as a hologram, and the hologram is displayed to display a reproduced image of the subject In an electronic holographic stereoscopic video playback device for playback,
A hologram display means for displaying the hologram, a light irradiation means for irradiating the hologram displayed by the hologram display means with reading light, and a reproduced image through the diffracted light of the hologram output by the reading light of the light irradiation means A reproducing lens to be formed, and a light-shielding plate arranged at the focal position of the reproducing lens to block half of the diffracted light,
The distance obtained by combining the distance from the photographing lens to the subject image formed by the photographing lens and the distance from the subject image by the hologram displayed by the hologram display unit to the reproduction lens is the focal length of the photographing lens. An electronic holographic stereoscopic video reproduction apparatus, wherein the reproduction lens is installed so as to have a sum of the focal length of the reproduction lens and the focal length of the reproduction lens.

Images