JP2008065288A - Space video display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that in a conventional apparatus for displaying an actual image in a space, the depth of a space image cannot be easily perceived, a video may be erroneously viewed as if it is not in a space but beyond it, which degrades exhibition effects, and it is difficult to view a video from many directions. <P>SOLUTION: A transparent housing is composed of a half mirror. A space image is fixed in the space of the housing. By observing the video from the outside of the transparent housing, the space video within the transparent housing can be surely visibly recognized. In addition, such a video can be seen from many directions. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

    The present invention relates to an apparatus for displaying an image in a space used for museum exhibitions and the like.

    A conventional space video device that displays a real image image has an image forming position in an open space, and aims at an effect that an image appears to jump out from the device.

    However, since the human eye has insufficient ability to perceive the depth position of the aerial image, the image is not necessarily recognized as being in space, and it is therefore difficult to display images in a plurality of directions in the same space.

    In the spatial video apparatus described above, there is no visual index other than the video imaged in the space, and it is difficult to recognize that the video image exists in the space.

    The present invention solves the disadvantages of such conventional devices, makes it possible to clearly see that there is an image in the space, and allows different images to be viewed in a certain space from a plurality of directions. The purpose is to enhance the exhibition effect as possible.

    In order to achieve the above object, the present invention is configured such that an image is displayed in a space in a housing made of a half mirror, a transparent plate, or a combination of both, and images are displayed from a plurality of directions. It is possible to configure to see

    The first method that constitutes the above solution is that the light beam of the imaging optical system is introduced inside the casing, reflected by a half mirror that constitutes the casing surface, and then a real image is formed in the internal space of the casing. It arranges to do.

    In the apparatus configured as described above, when viewed from the outside of the housing from the extension of the light beam reflected by the half mirror, the image is surely seen in the space inside the housing.

    The second method is to reflect the light beam after the real image imaging position of the imaging optical system on the outer surface of the casing.

    In the second method, a virtual image is seen when observed from the extending direction of the light beam reflected on the surface of the housing, and the position thereof is still inside the housing.

    In the spatial video apparatus of the present invention, the spatial video to be observed is always localized in the transparent casing.

    And since the half mirror which comprises a transparent housing | casing exists as a visual clue in the back and the front of the localized image, it is visually recognized that a video | video is definitely in the space between both, ie, a transparent housing | casing. This in turn ensures the display effect of the space video device.

    In addition, the spatial image device of the present invention is configured so that a transparent casing is a polyhedron such as a polygonal pyramid, and an optical system corresponding to each surface is provided, so that spatial images in each direction in the transparent casing can be obtained from multiple directions. It has the feature that it can be observed and is very easy to see visually.

    Hereinafter, embodiments of the present invention will be described with reference to FIGS.

    1 to 3, the half mirrors 4 and 12 and the half mirror or the transparent plate 6 together constitute a transparent casing that transmits light. In order to make the optical explanation easy to understand, only the portion that contributes to the image formation in the figure is illustrated, and it is considered as a part of the transparent casing 29 constituted by the upper half mirror of FIG. Good.

    In FIG. 1, a light beam 3 in front of a position where an image on a video display screen 1 such as a liquid crystal is imaged as a real image by an imaging lens 2 is reflected by a half mirror 4, and a half mirror 4 and a half mirror or A real image 5 is formed in the space between the transparent plates 6.

    When the real image 5 is viewed through the half mirror or the transparent plate 6 from the direction of the viewpoint 8 in the extension of the light beam 7 reflected by the half mirror, the half mirror 4 is seen in the back, the real image 5 is seen in front of it, and further in front of it. Since the half mirror or the transparent plate 6 is visible, the real image 5 is visually recognized as being surely present in the space in the transparent casing.

    As shown in FIG. 1, when the viewing direction may be one direction of the transparent housing, the half mirror or transparent plate corresponding to the transmission side does not need a reflection function and may be a simple transparent plate. It is preferable to use a material having a reflectance of 4% or more and less than 50%.

    2 shows two sets of the image display screen of FIG. 1 and the optical system of the imaging lens and the half mirror facing each other. When viewed from the viewpoint 8, the image on the image display screen 1 is converted into a transparent image as a spatial image. When viewed from the viewpoint 15, the image on the video display screen 9 appears as a spatial video in the transparent housing. The viewpoint direction can be increased by increasing the number of sets of optical systems.

    In FIG. 3, the light beams 16 and 17 after the image display screens 1 and 9 are imaged as the real images 5 and 13 by the imaging lenses 2 and 10 are reflected by the half mirrors 4 and 12, and the viewpoints 20 and 21 are reflected. The virtual images 18 and 19 that are localized in the transparent casing can be seen from the direction of.

    In FIG. 4, a transparent casing is formed by using half mirror concave mirrors 22 and 23 having curvature and imaging characteristics instead of the half mirrors 4 and 12 in the configuration of FIG. Are imaged as real images 5 and 13 in the transparent casing by the half mirror concave mirrors 22 and 23, and are observed as spatial images in the transparent casing from the viewpoints 24 and 25.

    In the case of FIG. 4, since the half mirror concave mirrors 22 and 23 have imaging characteristics, the imaging lens can usually be omitted.

    FIG. 5 shows an embodiment in the case of constructing a spatial video device viewed from four directions according to the present invention. The spatial image in each direction exists as a real image 28 in the space in the center of the quadrangular pyramid transparent casing 29 formed of a half mirror, and can be viewed from each viewpoint 30. If the transparent casing is formed as a polygonal pyramid having more surfaces and a corresponding image optical system is provided on each surface, an apparatus that can be viewed from more directions can be configured.

It is a block diagram corresponding to the viewpoint of one direction of this invention. It is a block diagram corresponding to the viewpoint of 2 directions of this invention. It is a block diagram which makes the aerial image of this invention a virtual image. It is a block diagram which used the half mirror concave mirror for the image formation element of this invention. It is a sketch of the Example comprised so that this invention could be seen from four directions.

Explanation of symbols

1. 1. Video display screen 2. Imaging lens 3. Light flux that has passed through the lens Half mirror 5. Real image 6. Half mirror or transparent plate7. 7. The light beam reflected by the half mirror 4 Viewpoint 9. Video display screen 10. Imaging lens 11. 11. Light beam that has passed through the lens Half mirror 13. Real image 14. 14. Light beam reflected by the half mirror 12. Viewpoint 16. 16. Light beam after passing through the lens and forming a real image Light flux after passing through the lens and forming a real image 18. Virtual image 19. Virtual image 20. Viewpoint 21. Viewpoint 22. Half mirror concave mirror 23. Half mirror concave mirror 24. Viewpoint 25. Viewpoint 26. Video display screen 27. Imaging lens 28. Real image 29. A quadrangular pyramid transparent casing composed of half mirrors 30. point of view

Claims (4)

  In a video device that displays an image on a video screen as a real image in space using an imaging optical system, the light beam that has passed through the imaging lens is inside a transparent housing that is made up of a half mirror or half mirror and a transparent plate. The image is reflected on the inner surface to form a real image inside the transparent housing, and is viewed outside the transparent housing from the viewpoint of the optical axis direction of the light beam reflected by the half mirror. A spatial video device configured to be able to visually recognize that a real image video exists in space.   2. The apparatus according to claim 1, wherein a light beam after the real image is formed by the imaging lens is reflected by an outer surface of the transparent casing formed by using a half mirror to form a virtual image inside the transparent casing. A spatial image device configured to be able to visually recognize that an image exists in the space inside the transparent housing by viewing it from the viewpoint of the optical axis direction of the light beam reflected by the half mirror outside the transparent housing.   2. The apparatus according to claim 1, wherein a half mirror concave mirror having a curvature in the half mirror is provided as an alternative to the half mirror, and a real image of the video screen is created by utilizing the imaging characteristics, and is passed through the opposite half mirror concave mirror. A spatial image device configured to be able to visually recognize that a real image image exists in a space in a transparent casing configured by a half mirror concave mirror.   4. The apparatus according to claim 1, wherein the reflecting surface of the transparent casing formed by using the half mirror is configured to have four or more reflective surfaces, and an image optical system corresponding to each surface is provided to provide four or more directions. A spatial video device configured to be able to view a spatial video in a space in a transparent housing from multiple directions.

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