JP4741395B2 - 3D image display device - Google Patents

Description

  The present invention relates to a stereoscopic video display device that displays stereoscopic video.

  2. Description of the Related Art Conventionally, development and examination of a method for displaying a stereoscopic image, in particular, a method that does not use special glasses when a viewer observes the stereoscopic image (hereinafter referred to as a conventional method without glasses) has been actively conducted. Many conventional glasses-less methods, except for the holography method, have a lenticular screen, parallax barrier, etc. placed in front of the display part of a flat panel display device such as a liquid crystal that displays normal two-dimensional video information. It is configured.

  These conventional glasses-free methods are not only configured to provide two types of parallax images corresponding to the right and left eyes, but also a multi-view method of three or more eyes, that is, three or more types of parallax. It can be configured to provide an image.

  Among conventional glasses-free methods, there is a method in which lenses and pinholes are two-dimensionally arranged (hereinafter referred to as a lens plate method), which is one of the stereoscopic image methods that can be viewed freely from any viewpoint (observation point). For example, so-called integral photography (hereinafter referred to as IP method) using a convex lens group or a pinhole group arranged on a plane is known.

Here, an IP system using a lens group, that is, an IP apparatus using the IP system will be described with reference to FIGS. 22, 23, and 24. FIG. As shown in FIG. 22, the IP device 101 captures an element image group (a plurality of element images) of the subject H and displays it as a stereoscopic reproduction image (stereoscopic image). A photographic film 105 for imaging a lens group 103 composed of a plurality of convex lenses 103 ₁ , 103 ₂ , 103 ₃ ,..., 103 _n arranged on a plane, and an elemental image group of the subject H imaged by the lens group 103. And. Incidentally, in the IP device 101, the front lens group 103 and a side, the b-side and rear of the lens group 103, the element image _{Y 1, Y 2, Y 3} , ···, and _{Y n.}

  Also, as shown in FIG. 23, the IP device 101 develops a photographic film 105 on which an elemental image group of the subject H is imaged, and the developed photographic film 105 is imaged on the lens group 103. They are placed in the same position. In this state, when an observer observes the photographic film 105 from the front of the lens group 103, a stereoscopic reproduction image (stereoscopic image) S can be observed. Here, referring to the stereoscopic reproduction image S observed by the observer, the video information (luminance and color) of the stereoscopic reproduction image S is obtained by viewing the subject H from the lens group 103 side at the time of shooting. The depth (unevenness) of the three-dimensional reproduced image S is viewed from the direction corresponding to the observer position at the time of display at the time of shooting. For this reason, the observed three-dimensional reproduced image S is not a correct three-dimensional image of the subject H, but an image whose depth is inverted (reverse depth image).

Conventionally, in order not to generate the reverse depth image, the stereoscopic reproduction image S displayed in FIG. 23 is captured again, and the stereoscopic reproduction image (recaptured stereoscopic reproduction image) captured again is as shown in FIG. Need to be displayed. Note that the re-captured stereoscopic reproduction image can be obtained by electronic processing. This electronic processing is to convert the element image so as to be point-symmetric about the optical axis position of each convex lens 103 ₁ , 103 ₂ , 103 ₃ ,..., 103 _n . Details of this conversion are disclosed in Non-Patent Document 1.

  The positions of the lens group 103 and the photographic film 105 of the IP device 101 are switched, and re-imaging or electronic processing is performed to display using the element image group obtained so as to avoid the reverse depth image. As a result, as shown in FIG. 24, a stereoscopic reproduction image having a correct depth can be obtained as in the case of observation from the c side, that is, the imaging side when the subject H is imaged.

Further, if the fiber optical system disclosed in Patent Document 1 is used instead of the convex lenses 103 ₁ , 103 ₂ , 103 ₃ ,..., 103 _n , re-imaging and electronic processing may be unnecessary. it can.

  In addition, in the IP system, when an element image group is displayed by electronic means, it is necessary to display a large number of element images. Therefore, an LCD (Liquid Crystal Display) or the like capable of displaying high-definition video is used. Thus, a method of placing a lens plate on the display surface side of the LCD is employed.

  Further, in the IP method, instead of using a direct view type FPD that directly displays the element image group to display the element image group, the element image group is projected onto a screen using video projection means, By placing a lens plate on the opposite side of the projection side and observing from the opposite side (observation side) of the lens plate and the screen facing each other, a plurality of projected element image groups (projection-type images) can be obtained. An example in which the resolution (total number of pixels) is improved by connecting them together has also been reported (see Non-Patent Document 2, for example).

  In general, in the IP system, when attention is paid to a certain element image in the element image group, there is one corresponding lens (convex lens) in the lens group constituting the lens plate. When the observer observes the stereoscopic reproduction image (stereoscopic image), the observer observes a part of each corresponding element image through each lens.

  For this reason, in the IP method, the observable range (viewing zone) of the stereoscopic reproduction image is determined by the size of the element image and the focal length of the lens. Incidentally, the element image is displayed at a position approximately spaced from the lens by the focal length. Here, the relationship between the position of each lens of the lens plate and the element image will be described with reference to FIG. For example, the relationship between the position of each lens on the lens plate and the element image is such that the optical axis of each lens coincides with the center of the corresponding element image, and the distance between the lenses and the distance between the element images are Arranged to be the same.

  In the example shown in FIG. 25, unlike this method, the distance between the lenses of the lens plate is set so that the width W of the region where the observer can observe the three-dimensional reproduction image is maximized at a specific observation distance V. On the other hand, the arrangement of the element images is determined so as to slightly increase the interval between the element images (see, for example, Non-Patent Document 3).

  Further, as shown in FIG. 26, in addition to the width W of the region where the stereoscopic reproduction image can be observed, the observer can reproduce the stereoscopic reproduction image reproduced by the corresponding lens and the adjacent lens with respect to a certain element image. Can be observed in the adjacent viewing zone. When the lens is adjacent to the opposite direction (lower side in FIG. 26 (left side as viewed from the observer)), it is not only in one direction (in FIG. 26, upper side (right side as viewed from the observer)). When the lens is arranged two-dimensionally in the direction, a stereoscopic reproduction image can be observed not only in the left-right direction but also through lenses adjacent in the up-down direction.

  Furthermore, in the IP system, a three-dimensional reproduction image can be observed not through the next lens but through two, three,..., N separated lenses. The possibility of forming arises. As described above, in the IP system, in addition to the viewing area (correct viewing area) designed (assumed) in advance, a large number of viewing areas are generated around the viewing area.

  In addition to the predesigned viewing zone, a new viewing zone is created around the viewing zone in the conventional IP method, but there is a merit that a stereoscopic reproduction image can be observed simultaneously by a plurality of persons. In the peripheral viewing area other than the pre-designed viewing area, geometric distortion may occur. In addition, when a stereoscopic reproduction image is observed at a position that crosses the boundary between two viewing zones, the depth of the stereoscopic reproduction image may be reversed, so-called reverse viewing may occur, and correct stereoscopic reproduction may occur. From the viewpoint of reproducing an image, it is preferable that observation is possible only in the correct viewing zone.

  By the way, in the conventional IP system, if a projection display can be used to display a three-dimensional reproduction image, the projection display realizes high image quality as performance increases. Even if the size is increased, that is, the stereoscopic reproduction image to be displayed is enlarged, high image quality can be maintained. Further, there is a degree of freedom in which the screen size can be adjusted to be larger or smaller depending on the location where the projection display is installed.

By the way, when displaying a normal image on a projection display, the projection method for displaying the image is to project from the front projection type that projects from the front of the screen, which is the display screen that displays the image, and from the back of the screen. There are two types: rear projection type. In the IP system, since it is necessary to dispose a lens plate so as to be close to a display screen for displaying a stereoscopic reproduction image, the projection display to be used is limited to the rear projection type.
JP-A-10-150675 Mitsuho Yamada “Integral 3D TV”, Monthly Display, vol. 7, no. 6, p. 29-34, June 2001 IEICE Transactions D-II Vol. J87-D-II, no. 12, pp. 2198-2208 Analysis of resolution limitation of integral photography, J. et al. Opt. Soc. Am. A Vol. 15, no. 8 (1998) p. 2064 FIG. 10 and formula (29)

  However, this rear projection type display is easy to use because it can be used in the same way as a direct-view type display screen such as a plasma display or a liquid crystal display, as a display screen for displaying an image. However, there are the following problems. .

  In a rear projection type display, a screen serving as a display screen for displaying an image is generally a transmission type and has an isotropic diffusion layer, so that there is a problem that a reduction in resolution is unavoidable. In addition, since the image projection means is installed on the opposite side of the observation position across the screen, the installation space for the image projection means must be secured, and the installation location for installing the rear projection display is limited. There is a problem of being done.

  Therefore, an object of the present invention is to provide a stereoscopic video display apparatus that solves the above-described problems, can prevent the resolution characteristics of the stereoscopic reproduction image from being deteriorated, and does not limit the installation location.

In order to solve the above-described problem, the stereoscopic video display device according to claim 1 or 2 includes a video projection unit that projects an elemental image group including a plurality of elemental images for constituting a stereoscopic video by an integral photography method. A stereoscopic image display device that has an optical path to an observation position for observing the stereoscopic image reflected by a plane mirror disposed at a predetermined position, and includes a first lens group and a lens. In claim 1, the lens is disposed at a predetermined position of the optical path for projecting the lens, and in claim 2, the lens is disposed at a position facing the first lens group.

  According to such a configuration, the stereoscopic video display apparatus projects the element image group constituting the stereoscopic video by the video projection unit. Then, the stereoscopic image display device is a position where the light beam group forming the element image group is incident on the projected optical path and is emitted to the plane mirror, and the beam group reflected from the plane mirror is emitted toward the observation position. A first lens group in which a field lens corresponding to an element image and a plurality of lens systems acting as element lenses are arranged on one plane is arranged at a position. In addition, the stereoscopic image display device has a lens in which a light beam group forming an element image group is set at a predetermined position on the optical path as a light beam group in which principal rays of the light beam group are parallel to each other. The predetermined position on the optical path where the lens is arranged may be a position where a light beam group forming an element image group projected from the video projection unit is incident, or a position where a light beam group emitted from the first lens group is incident. Good. Furthermore, the form of this lens may be a biconvex lens or a plano-convex lens that is in close contact with a plane mirror.

According to a third aspect of the present invention, there is provided a stereoscopic video display apparatus including a concave mirror disposed at a predetermined position from a video projection unit that projects an element image group including a plurality of element images for constituting a stereoscopic video by an integral photography method. And a stereoscopic image display apparatus having an optical path to an observation position for observing the stereoscopic image, the first lens group being provided.

  According to such a configuration, the stereoscopic video display apparatus projects the element image group constituting the stereoscopic video by the video projection unit. Then, the stereoscopic image display device is a position where the light ray group constituting the element image group is incident on the projected optical path and is emitted to the concave mirror, and the light ray group reflected from the concave mirror is emitted toward the observation position. A first lens group in which a field lens corresponding to an element image and a plurality of lens systems acting as element lenses are arranged on one plane is arranged at a position.

The stereoscopic image display device according to claim 4 or 5 is a half image arranged at a predetermined position from a video projection unit that projects an element image group including a plurality of element images for constituting a stereoscopic image by an integral photography method. A stereoscopic image display device having an optical path to an observation position of the stereoscopic image that is reflected through the half mirror, reflected through the half mirror, and reflected through the half mirror via a mirror and a plane mirror. The first lens group and the lens are provided. In claim 4, the lens is disposed at a predetermined position on the optical path between the image projection means and the half mirror, and in claim 5, the lens is disposed at a position facing the first lens group.

  According to such a configuration, the stereoscopic video display apparatus projects the element image group constituting the stereoscopic video by the video projection unit. Then, the stereoscopic image display device is a position where the light beam group forming the element image group is incident on the projected optical path and is emitted to the plane mirror, and the beam group reflected from the plane mirror is emitted toward the observation position. A first lens group in which a field lens corresponding to an element image and a plurality of lens systems acting as element lenses are arranged on one plane is arranged at a position. In addition, the stereoscopic image display device has a lens in which a light beam group forming an element image group is set at a predetermined position on the optical path as a light beam group in which principal rays of the light beam group are parallel to each other. The predetermined position on the optical path where the lens is arranged may be a position where a light beam group forming an element image group projected from the video projection unit is incident, or a position where a light beam group emitted from the first lens group is incident. Good. Furthermore, the form of this lens may be a biconvex lens or a plano-convex lens that is in close contact with a plane mirror. In this stereoscopic image display device, since the half mirror is provided, the image projection means is not installed behind the first lens group (opposite to the observation position where the observer observes the stereoscopic image), and is viewed from the observation position. In this case, it can be installed on the right side or the left side, and the installation space of the depth when installing the device can be saved.

The stereoscopic video display device according to claim 4 includes a half mirror disposed at a predetermined position from a video projection unit that projects an element image group including a plurality of element images for constituting a stereoscopic video by an integral photography method. A stereoscopic image display device having an optical path to an observation position of the stereoscopic image that is reflected through the concave mirror, reflected by the concave mirror, reflected through the concave mirror, and transmitted through the half mirror again through a concave mirror, The first lens group is provided.

  According to such a configuration, the stereoscopic video display apparatus projects the element image group constituting the stereoscopic video by the video projection unit. Then, the stereoscopic image display device is a position where the light ray group constituting the element image group is incident on the projected optical path and is emitted to the concave mirror, and the light ray group reflected from the concave mirror is emitted toward the observation position. A first lens group in which a field lens corresponding to an element image and a plurality of lens systems acting as element lenses are arranged on one plane is arranged at a position.

According to the first , second, fourth , and fifth aspects of the invention, when projecting the element image group, since the observer is performing from the side of observing the stereoscopic video and not projecting from the back, the stereoscopic reproduction is performed. Deterioration of the resolution characteristics of the image can be prevented, and the image projection means is arranged on the side observed by the observer. For example, the image projection means is installed on the ceiling like a front projection display. If installed, it is not necessary to secure the depth of the device when the device is installed, and the installation location is not limited.

According to the third and sixth aspects of the invention, the lens can be omitted by using the concave mirror instead of the plane mirror to reflect the light beam group. There is no need to secure depth, and the installation location is not limited.

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
From this, 6 embodiment (1st embodiment-6th embodiment) is described about a stereoscopic video display apparatus. The configuration of each embodiment will be described, and then the operation will be described.

(Configuration of stereoscopic image display apparatus [first embodiment])
FIG. 1 is a schematic diagram of a stereoscopic image display apparatus (first embodiment). As shown in FIG. 1, a stereoscopic video display device 1 displays a stereoscopic video by an input (or generated) element image group based on the IP principle, and includes a video projection unit 3, A convex lens (lens) 5, a half mirror 7, a first lens group 9, and a plane mirror 11 are provided.

  The stereoscopic video display device 1 is configured to transmit half of a half-image mirror 7 and a plane mirror 11 disposed at predetermined positions from a video projection unit 3 that projects an element image group including a plurality of element images for forming a stereoscopic image. The direction of the optical path is changed by the mirror 7, the light is reflected by the plane mirror 11, and has an optical path to the observation position of the stereoscopic image observed through the half mirror 7 again.

  The video projecting means 3 projects a two-dimensional video composed of the input elemental image group. Note that the element image group is one that has been processed in order to avoid a stereoscopic image to be displayed as a reverse depth image, or acquired according to an imaging method that avoids a reverse depth image. is there.

  The convex lens 5 turns the light ray group forming the elemental image group projected by the video projection unit 3 into a light ray group in which principal rays are parallel to each other (hereinafter referred to as a parallel light ray group). The convex lens 5 has a large aperture and a size that can cover the angle of view of the video projection means 3 when placed in the vicinity of the video projection means 3. In the light ray group which is made into a parallel light ray group by the convex lens 5, the principal ray is a bundle of light passing through the center of the stop of the projection lens (not shown) of the image projection means 3.

  The half mirror 7 changes the direction of the parallel light beam emitted from the convex lens 5 so as to be perpendicularly incident on the plane formed by the first lens group 9 and transmits the reflected light reflected by the parallel light beam group. To do.

  The first lens group 9 includes a plurality of minute field lenses arranged on one plane so as to correspond to each element image included in the parallel light group (element image group). The parallel light beam whose direction has been changed and the reflected light reflected by the parallel light beam are transmitted. Note that the parallel light ray group whose direction is changed by the half mirror 7 and incident on the first lens group 9 is constituted by the first lens group 9 by the action of a projection lens (not shown) of the image projection means 3. It is adjusted in advance so that the element image is formed on the plane. In addition, the components incident on the center of each field lens constituting the first lens group 9 among the principal rays of the parallel light group are parallel to each other even after passing through the center of the lens, and after passing through the plane mirror 11. The reflected light reflected at 1 is also incident perpendicular to the plane formed by the first lens group 9.

  The plane mirror 11 reflects the parallel light beam group (element image group) that has passed through the first lens group 9, and the reflected light that has been reflected enters the first lens 9 again. The reflected light reflected by the plane mirror 11 is a light beam parallel to each other, is incident perpendicularly to the plane formed by the first lens group 9, passes through the first lens group 9 and the half mirror 7, and is observed. The person O proceeds in the direction of observing the stereoscopic image.

  Up to now, in the stereoscopic image display apparatus 1, the light beam that passes through the center of each field lens of the first lens 9 through the convex lens 5 and the half mirror 7 in the elemental image group projected by the video projection means 3. (Chief ray) has been described. Here, referring to FIG. 2, a series of actions including the peripheral rays other than the chief ray that pass through each field lens of the first lens 9 (the traveling direction of the ray group) Etc.) will be described in detail.

FIG. 2A is a diagram showing a group of light beams forming an elemental image group projected by the video projection unit up to a plane mirror via a convex lens and a first lens group. In FIG. 2A, the half mirror 7 is omitted, and the light beam group constituting the element image group is shown to travel straight. As shown in FIG. 2A, the position of the exit pupil of the video projection means 3 is designed to be the focal length f ₀ of the convex lens 5. Among the light ray groups forming the element image group projected from the center of the exit pupil, the principal ray group (bundle of principal rays) becomes a parallel ray group parallel to each other.

  FIG. 2B and FIG. 2C are views showing a light beam group in the vicinity of the first lens group and the plane mirror. As shown in FIG. 2B, the first lens group 9 and the plane mirror 11 are arranged with a distance of 1/2 (f / 2) of the focal length f of the field lens 9a constituting the first lens group 9. Yes. As shown in FIGS. 2B and 2C, when the plane mirror 11 reflects the parallel light beam group, it is as if left and right symmetrical with the first lens group 9 with the plane mirror 11 in between. There is a group, and a group of light rays that pass through the lens group is emitted as reflected light. In FIG. 2B, a lens group that is symmetric with respect to the first lens group 9 is indicated by a dotted line.

  Then, the element image formed at the position of each field lens 9a of the first lens group 9 is condensed on each lens of the lens group indicated by a dotted line, and has a plane mirror with an angle corresponding to the position in the element image group. 11 is emitted. That is, the lens group that is symmetrical with the first lens group 9 acts as an element lens in the IP system. In FIG. 2C, this action is illustrated as reflected light of the plane mirror 11, and a viewing zone is formed on the same side as viewed from the projection side on which the element image group is projected.

  FIG. 2D is a diagram showing a state of viewing zone formation by the stereoscopic video display device. As shown in FIG. 2D, a viewing zone is formed in an angular range constituted by elemental image groups emitted from the field lenses 9a constituting the first lens group 9.

  As described above, according to the stereoscopic video display device 1 shown in FIG. 1, by projecting the element image group from the front surface (the projection side of the element image group and the observation side of the stereoscopic image), the stereoscopic image ( IP stereoscopic video) can be observed, and a stereoscopic video that does not deteriorate in resolution as in the case of using a diffuser plate can be obtained as in a conventional apparatus.

  The stereoscopic image display device 1 assumes a configuration in which the field lenses constituting the first lens group 9 are two-dimensionally arranged so that parallax can be reproduced in all directions including the vertical and horizontal directions. Yes. However, depending on the field of use in which stereoscopic video is used, it may be necessary to realize parallax only in the horizontal direction. In this case, each element image is arranged in a strip shape in the vertical direction, and each field lens of the first lens group 9 is a lenticular lens having a refractive action only in the horizontal direction. In this case, a diffusion sheet having diffusion characteristics only in the vertical direction or a lenticular lens sheet having a horizontal arrangement with a sufficiently fine pitch is used.

(Operation of stereoscopic image display device [first embodiment])
Next, the operation of the stereoscopic video display apparatus 1 will be described with reference to the flowchart shown in FIG. 3 (see FIG. 1 as appropriate).
First, the stereoscopic video display apparatus 1 projects the input elemental image group onto the convex lens 5 by the video projection unit 3 (step S1). Subsequently, the stereoscopic image display apparatus 1 uses the convex lens 5 to convert the light beam group forming the element image group into a parallel light beam group, and converts the traveling direction of the parallel light beam group with the half mirror 7 (step S2).

  Then, the stereoscopic image display apparatus 1 transmits the parallel light beam group by the first lens group 9, reflects the parallel light beam group by the plane mirror 11 (step S <b> 3), and uses this reflected reflected light as the first lens group. 9 and the half mirror 7 are transmitted to display a stereoscopic image (step S4).

(Configuration of stereoscopic image display device [second embodiment])
Next, the configuration of the stereoscopic video display device (second embodiment) will be described with reference to FIG. FIG. 4 is a schematic diagram of a stereoscopic video display device (second embodiment). As shown in FIG. 4, the stereoscopic video display device 1 </ b> A displays a stereoscopic video by an input (or generated) element image group based on the IP principle, and includes a video projection unit 3, A half mirror 7, a first lens group 9, a plane mirror 11, and a convex lens 13 are provided. The same components as those of the stereoscopic video display device 1 shown in FIG.

  The convex lens 13 is obtained by arranging the convex lens 5 shown in FIG. 1 at a position close to the first lens group 9. The convex lens 13 makes the principal rays of the light ray group forming the elemental image group projected from the video projection means 3 vertically incident on the plane formed by the first lens group 9.

  The light beam incident on the first lens group 9 by the convex lens 13 is totally reflected by the plane mirror 11 via the first lens group 9, and the totally reflected light is incident on the first lens group 9 again. To do. In this case, the reflected light reflected by the plane mirror 11 is again focused by the convex lens 13, so that the viewing zone is effectively focused on the observation position where the observer observes the stereoscopic image. Note that the reflected light that has been focused by the convex lens 13 is referred to as focused reflected light.

A series of actions (such as the traveling direction of the light beam) of the stereoscopic image display apparatus 1A will be described with reference to FIG. 5 (see FIG. 4 as appropriate).
FIG. 5A is a diagram showing a group of light beams forming an elemental image group projected by the video projection unit up to a plane mirror via a convex lens and a first lens group. In FIG. 5A, the half mirror 7 is omitted, and the light beam group forming the element image group is shown to travel straight. As shown in FIG. 5A, the position of the exit pupil of the image projection means 3 is designed to be the focal length f ₀ of the convex lens 5. Among the light ray groups forming the element image group projected from the center of the exit pupil, the principal ray group (bundle of principal rays) becomes a parallel ray group parallel to each other.

  In FIG. 5A, the first lens group 9 and the plane mirror 11 are arranged at a distance of 1/2 (f / 2) of the focal length f of the field lens 9a constituting the first lens group 9. .

  In this stereoscopic video display device 1A, the elemental image group projected by the video projection unit 3 is formed on the plane formed by the first lens group 9 by the action of the projection lens 3a of the video projection unit 3. Has been adjusted. Further, the size of the image formed on the plane formed by the first lens group 9 is adjusted in advance so that each element image is the size of each field lens that forms the first lens group 9.

  FIG. 5B is a diagram showing the reflecting action of the plane mirror with respect to the convex lens, the first lens group, and the light beam group in the vicinity of the plane mirror. As shown in FIG. 5B, the light beam group reflected by the plane mirror 11 by the reflection action of the plane mirror 11 is again subjected to the actions of the first lens group 9 and the convex lens 13. That is, in the plane mirror 11, when reflecting a parallel light beam group, there exists a lens group and a lens which are symmetrical with the first lens group 9 and the convex lens 13 with the plane mirror 11 interposed therebetween. A light ray group that passes through the light is emitted as reflected light. That is, the lens group and the lens which are symmetrical with the first lens group 9 and the convex lens 13 act as an element lens in the IP principle and a condenser lens arranged on the emission side.

  Then, the element image formed at the position of each field lens 9a of the first lens group 9 is condensed on each lens of the lens group indicated by a dotted line, and has a plane mirror with an angle corresponding to the position in the element image group. 11 is emitted.

In FIG. 5B, the portion illustrated on the left side of the plane mirror 11 shows a state after the light beam group is reflected by the plane mirror 11 (in fact, it is reflected by the plane mirror 11; FIG. 5 (b) is merely shown for explanation of the principle). This portion shows a lens group that is bilaterally symmetric with the first lens group 9 and the convex lens 13 and a light beam group that has passed through the lens. Of these, the ray group shown at the top shows what path one pixel in the element image takes, and the ray group shown at the bottom shows what path the whole element image takes. Yes. This light ray group is subjected to the action of a lens that is symmetrical to the convex lens 13 and converges at a position away from the focal distance f ₀ , and forms a viewing zone near the converged position. The viewing zone formed in the vicinity of this converged position is shown in FIG. In addition, FIG.5 (c) is the figure shown about the viewing zone when a light ray group reflects with a plane mirror.

  As shown in FIG. 5 (c), the reflected light reflected by the plane mirror 11 acts as an element lens for each element image in the field lens 9 a constituting the first lens group 9, and has a constant width by the convex lens 13. Configure the viewing zone.

  According to this stereoscopic video display device 1A, the stereoscopic video (IP stereoscopic video) is observed by projecting the elementary image group from the front surface (the projection side of the elementary image group and the stereoscopic video viewing side). In addition, as in the conventional apparatus, a stereoscopic image can be obtained in which the resolution is not deteriorated as occurs when a diffusion plate is used.

  The stereoscopic image display apparatus 1A assumes a configuration in which the field lenses constituting the first lens group 9 are two-dimensionally arranged so that parallax can be reproduced in all directions including vertical and horizontal directions. Yes. However, depending on the field of use in which stereoscopic video is used, it may be necessary to realize parallax only in the horizontal direction. In this case, the first lens group 9 is arranged in a strip shape in the vertical direction, and each field lens of the first lens group 9 is a lenticular lens having a refractive action only in the horizontal direction. In this case, a diffusion sheet having diffusion characteristics only in the vertical direction or a lenticular lens sheet having a horizontal arrangement with a sufficiently fine pitch is used.

(Operation of stereoscopic image display device [second embodiment])
Next, the operation of the stereoscopic video display apparatus 1A will be described with reference to the flowchart shown in FIG. 6 (see FIG. 4 as appropriate).
First, the stereoscopic video display apparatus 1A projects the input elemental image group onto the half mirror 7 by the video projection unit 3 (step S11). Subsequently, the stereoscopic image display apparatus 1 </ b> A converts the traveling direction of the light beam group by the half mirror 7 (step S <b> 12).

  Then, the stereoscopic image display apparatus 1A transmits the light beam group by the convex lens 13 and the first lens group 9, reflects the light beam group by the plane mirror 11 (step S13), and reflects the reflected light reflected by the first lens. A stereoscopic image is displayed by transmitting through the group 9, the convex lens 13 and the half mirror 7 (step S14). In this stereoscopic image display apparatus 1A, the reflected light is converged when passing through the convex lens 13, and becomes converged reflected light and is emitted to the observation side.

(Configuration of stereoscopic image display device [third embodiment])
Next, with reference to FIG. 7, the configuration of the stereoscopic video display device (third embodiment) will be described. FIG. 7 is a schematic diagram of a stereoscopic video display device (third embodiment). As shown in FIG. 7, the stereoscopic video display device 1B displays a stereoscopic video by an input (or generated) elemental image group based on the IP principle, and includes video projection means 3, A half mirror 7, a first lens group 9, a convex lens 15, and a plane mirror 11 are provided. The same components as those of the stereoscopic video display device 1 shown in FIG.

  The convex lens 15 is a lens in which the convex lens 5 shown in FIG. This convex lens 15 causes the principal rays of the light ray group forming the elemental image group projected from the video projecting means 3 to be incident perpendicularly on the plane formed by the plane mirror 11 after passing through the first lens group 9. Is.

  The light beam transmitted through the convex lens 15 is reflected by the plane mirror 11 and then passes again through the convex lens 15. Here, the chief rays of the light beam group undergo a focusing action and then pass through the first lens group 9 again. Thus, it is effectively focused on the observation position where the observer is located. Here, with reference to FIG. 8, a series of these actions (such as the traveling direction of the light group) will be described in detail.

  FIG. 8 is a diagram illustrating the operation of the stereoscopic image display device including the operation of the half mirror (without considering the reflection operation). In FIG. 8, the half mirror 7 is not shown. As shown in FIG. 8, in the stereoscopic video display device 1 </ b> B, the position of the exit pupil of the video projection unit 3 is arranged to be the focal length of the large-diameter convex lens 15.

  The element image group projected by the video projection unit 3 is adjusted to form an image at the position of the first lens group 9 by the action of the projection lens 3 a of the video projection unit 3. The image size of the elemental image to be formed is adjusted so as to correspond to each field lens 9 a constituting the first lens group 9.

  As a result, the plurality of principal rays (principal ray group) of the light ray group projected by the image projection means 3 pass through the convex lens 15 and become parallel to each other, and in this state, are subjected to the reflection action in the plane mirror 11. Then, the principal ray group reflected by the plane mirror 11 is equivalent to the first lens group 9 toward the observation position where the observer is located, and the viewing zone is set at a focal length from a virtual lens that is symmetric. Formed and focused by the action of the virtual lens.

  Here, means for realizing the action of the convex lens 15 in the stereoscopic image display apparatus 1B will be described with reference to FIG. 9 (see FIG. 7 as appropriate). In FIG. 9, the half mirror 7 is omitted in a form including the reflection action and the transmission action of the half mirror 7 (FIG. 7).

  As shown in FIG. 9A, the convex lens 15 is configured as a plano-convex lens as shown in FIG. 9B in addition to the biconvex lens, and the plane side is mirror-finished so that the plane mirror 11 (FIG. 7) and the function of the convex lens 15 can be provided simultaneously.

  Further, as shown in FIG. 9C, the convex lens 15 is not used, and instead of the plane mirror 11 (FIG. 7), a concave mirror 15a whose focal length is ½ of the focal length of the convex lens 15 is used. Can do. Further, although not shown, the concave mirror 15a may be a Fresnel mirror having a reflective surface formed on a flat surface.

  According to this stereoscopic video display device 1B, a stereoscopic video (IP stereoscopic video) is observed by projecting the elementary image group from the front surface (the projection side of the elementary image group and the stereoscopic video viewing side). In addition, as in the conventional apparatus, a stereoscopic image can be obtained in which the resolution is not deteriorated as occurs when a diffusion plate is used.

  Note that this stereoscopic image display device 1B assumes a configuration in which the field lenses constituting the first lens group 9 are two-dimensionally arranged so that parallax can be reproduced in all directions including vertical and horizontal directions. Yes. However, depending on the field of use in which stereoscopic video is used, it may be necessary to realize parallax only in the horizontal direction. In this case, each element image is arranged in a strip shape in the vertical direction, and each field lens of the first lens group 9 is a lenticular lens having a refractive action only in the horizontal direction. In this case, a diffusion sheet having diffusion characteristics only in the vertical direction or a lenticular lens sheet having a horizontal arrangement with a sufficiently fine pitch is used.

(Operation of stereoscopic image display device [third embodiment])
Next, the operation of the stereoscopic video display device 1B will be described with reference to the flowchart shown in FIG. 10 (see FIG. 7 as appropriate).
First, the stereoscopic video display apparatus 1B projects the input elemental image group onto the half mirror 7 by the video projection unit 3 (step S21). Subsequently, the stereoscopic image display apparatus 1B converts the traveling direction of the light beam group by the half mirror 7 (step S22).

  Then, the stereoscopic image display apparatus 1B transmits the light beam group by the first lens group 9 and the convex lens 15, reflects the light beam group by the plane mirror 11 (step S23), and reflects the reflected light to the convex lens 15, A stereoscopic image is displayed by transmitting through the first lens group 9 and the half mirror 7 (step S24). In this stereoscopic image display device 1B, the reflected light is converged when passing through the convex lens 15, and becomes converged reflected light that is emitted to the observation side.

(Configuration of stereoscopic image display apparatus [fourth embodiment])
Next, with reference to FIG. 11, the configuration of the stereoscopic video display device (fourth embodiment) will be described. FIG. 11 is a schematic diagram of a stereoscopic video display device (fourth embodiment). As shown in FIG. 11, the stereoscopic video display device 1 </ b> C displays a stereoscopic video by an input (or generated) element image group based on the IP principle, and includes a video projection unit 3, A convex lens 5, a first lens group 9, and a plane mirror 11 are provided. The same components as those of the stereoscopic video display device 1 shown in FIG.

  The stereoscopic image display apparatus 1C reflects the image from the image projection unit 3 that projects an element image group including a plurality of element images for forming a stereoscopic image through a plane mirror 11 arranged at a predetermined position, and It has an optical path to an observation position for observing an image.

In this stereoscopic video display device 1C, the front projection type configuration, the direction in which the element image group is projected from the video projection means 3 is maintained in the same direction as the direction in which the stereoscopic video is observed, and the stereoscopic video display shown in FIG. The half mirror 7 is omitted from the configuration of the apparatus 1.
In this stereoscopic video display device 1C, when a two-dimensional video composed of elemental image groups is projected by the video projection means 3, the light beams constituting the two-dimensional video are reflected by the convex lens 5 having a large diameter. The principal ray groups of the group are parallel to each other.

  Further, in this video projection means 3, the arrangement relationship between the projection lens 3a and the micro display device for displaying the two-dimensional video is a so-called lens shifted relationship, and the angle of view of the video projection is downward (FIG. 11). It is configured to have a projection action biased to the middle. Then, if a straight line (dashed line) indicating the center of the effective field angle of the two-dimensional image projected by the video projection unit 3 is an optical axis in this case, this optical axis is the center of the diaphragm of the video projection unit 3 and a convex lens. 5, and reaches the center of the plane formed by the first lens group 9 and the plane mirror 11.

  In this case, the angle θ formed by the optical axis and the plane formed by the first lens group 9 and the plane mirror 11 satisfies a certain condition described later. Under this condition, as shown in FIG. 11, the light beam group reflected by the plane mirror 11 is obliquely below (in FIG. 11) when a two-dimensional image is projected from an obliquely upward direction (in FIG. 11) of the screen. ), A viewing zone where a stereoscopic image can be observed is formed.

Here, the operation of the first lens group 9 and the plane mirror 11 will be described in detail with reference to FIG. 12 (see FIG. 11 as appropriate).
Here, paying attention to the principal ray passing through the center of the field lens 9a constituting the first lens group 9 out of the light ray group reaching the first lens group 9 from the image projection means 3 via the convex lens 5, The operation of the first lens group 9 and the plane mirror 11 will be described in detail.

  FIG. 12A shows a state immediately before the principal ray is reflected by the plane mirror, and FIG. 12B shows a state immediately after the principal ray is reflected by the plane mirror. As shown in FIG. 12, the first lens group 9 and the plane mirror 11 are spaced apart by 1/2 (f / 2) of the focal length f of the field lens 9a constituting the first lens group 9. Yes.

When the principal ray passing through the center of the field lens 9a constituting the first lens group 9 passes through the first lens group 9, is reflected by the plane mirror 11 and reaches the first lens group 9 again, the principal ray is , It passes through the adjacent field lens, not the field lens that originally passed. The condition of each θ satisfying this is θ = tan ⁻¹ (p / f) (1)
It is.

  In Equation (1), f is the focal length of the field lens constituting the first lens group 9, and p is the field lens through which the principal ray has passed before reflection and the field lens through which the principal ray has passed after reflection. Shows the interval.

By constructing the stereoscopic video display device 1C so as to satisfy this mathematical formula (1), as shown in FIG. 13, on the same side where the video projection means 3 is arranged, the stereoscopic video display device 1C can be viewed. A zone can be formed.
According to this stereoscopic video display device 1C, a stereoscopic video (IP stereoscopic video) is observed by projecting the elementary image group from the front surface (the projection side of the elementary image group and the stereoscopic video viewing side). In addition, as in the conventional apparatus, a stereoscopic image can be obtained in which the resolution is not deteriorated as occurs when a diffusion plate is used.

  Note that this stereoscopic image display device 1C assumes a configuration in which the field lenses constituting the first lens group 9 are two-dimensionally arranged so that parallax can be reproduced in all directions including vertical and horizontal directions. Yes. However, depending on the field of use in which stereoscopic video is used, it may be necessary to realize parallax only in the horizontal direction. In this case, each element image is arranged in a strip shape in the vertical direction, and each field lens of the first lens group 9 is a lenticular lens having a refractive action only in the horizontal direction. In this case, a diffusion sheet having diffusion characteristics only in the vertical direction or a lenticular lens sheet having a horizontal arrangement with a sufficiently fine pitch is used.

(Operation of stereoscopic image display device [fourth embodiment])
Next, the operation of the stereoscopic video display apparatus 1C will be described with reference to the flowchart shown in FIG. 14 (see FIG. 11 as appropriate).
First, the stereoscopic video display device 1C projects the input elemental image group onto the convex lens 5 by the video projection unit 3 (step S31). Subsequently, the stereoscopic image display apparatus 1C transmits the light beam group by the convex lens 5 and the first lens group 9, reflects the light beam group by the plane mirror 11 (step S32), and converts the reflected light that has been reflected into the first reflected light. A stereoscopic image is displayed by transmitting through one lens group 9 (step S33).

(Configuration of stereoscopic image display apparatus [fifth embodiment])
Next, with reference to FIG. 15, the configuration of the stereoscopic video display device (fifth embodiment) will be described. FIG. 15 is a schematic diagram of a stereoscopic video display device (fifth embodiment). As shown in FIG. 15, the stereoscopic video display device 1D displays a stereoscopic video by an input (or generated) group of element images based on the IP principle. A convex lens 5, a first lens group 9, and a plane mirror 11 are provided. The same components as those of the stereoscopic video display device 1 shown in FIG.

  In this stereoscopic image display device 1D, the convex lens 5 is disposed immediately before the first lens group 9, and similarly to the fourth embodiment, a two-dimensional image constituting the element image group is obliquely viewed from the plane mirror 11. By projecting by the video projection means 3, a viewing zone in which a stereoscopic video can be observed is formed without using a half mirror. In the stereoscopic image display apparatus 1D, the condition for the angle θ is set in the same manner as in the fourth embodiment.

  Here, FIG. 16 shows how the viewing zone is formed by the stereoscopic video display apparatus 1D. As shown in FIG. 16, due to the action of reflection, the number of convex lenses 5 is equivalent to that of two, and the distance between them is actually set close to the lens group 9 so as to be sufficiently small. For this reason, it is considered that the optical axis of the entire apparatus (indicated by a one-dot chain line) passes through the center of the convex lens 5 before and after reflection. Further, as shown in FIG. 16, on the same side as the video projection means 3 is arranged and in the reverse direction in which the video projection means 3 is arranged as viewed from the plane mirror 11 (downward direction in FIG. 16). ), A viewing zone where a stereoscopic image can be observed can be formed.

(Operation of stereoscopic image display device [fifth embodiment])
Next, the operation of the stereoscopic video display apparatus 1D will be described with reference to the flowchart shown in FIG. 17 (see FIG. 15 as appropriate).
First, the stereoscopic video display apparatus 1D projects the input elemental image group onto the convex lens 5 by the video projection unit 3 (step S41). Subsequently, the stereoscopic image display apparatus 1D transmits the light beam group by the convex lens 5 and the first lens group 9, reflects the light beam group by the plane mirror 11 (step S42), and reflects the reflected light reflected by the first lens group 9D. A stereoscopic image is displayed by transmitting through one lens group 9 (step S43).

(Configuration of stereoscopic image display apparatus [sixth embodiment])
Next, with reference to FIG. 18, the configuration of the stereoscopic video display device (sixth embodiment) will be described. FIG. 18 is a schematic diagram of a stereoscopic video display device (sixth embodiment). As shown in FIG. 18, the stereoscopic video display device 1E displays a stereoscopic video by an input (or generated) element image group based on the IP principle, and includes video projection means 3, A first lens group 9, a convex lens 5, and a plane mirror 11 are provided. The same components as those of the stereoscopic video display device 1 shown in FIG.

  In this stereoscopic image display apparatus 1E, the convex lens 5 is disposed immediately before the plane mirror 11, and similarly to the fourth embodiment and the fifth embodiment, the two-dimensional image forming the element image group obliquely as viewed from the plane mirror 11. By projecting the video by the video projection means 3, a viewing zone in which a stereoscopic video can be observed without using a half mirror is formed. In this stereoscopic image display device 1E, the condition of the angle θ is also set as in the fourth embodiment.

  Here, FIG. 19 shows how the viewing zone is formed by the stereoscopic video display apparatus 1E. As shown in FIG. 19, due to the action of reflection, the number of convex lenses 5 is equivalent to that of two, and the distance between them is actually set close to the lens group 9 so as to be sufficiently small. For this reason, it is considered that the optical axis of the entire apparatus (indicated by a one-dot chain line) passes through the center of the convex lens 5 before and after reflection. Further, as shown in FIG. 19, on the same side as where the video projection means 3 is arranged and in the opposite direction when the video projection means 3 is arranged as viewed from the plane mirror 11 (downward direction in FIG. 19). ), A viewing zone where a stereoscopic image can be observed can be formed.

Further, as shown in FIG. 20A, a biconvex lens that is in close contact with the plane mirror may be used as the convex lens 5, or as shown in FIG. 20B, a mirror surface is formed on the plane side as the convex lens 5. A plano-convex lens mirror may be used.
Furthermore, as shown in FIG. 20C, a concave mirror 15a may be used instead of the convex lens 5 and the plane mirror 11. In these cases, the same effect as that of the stereoscopic image display apparatus 1E can be obtained.

(Operation of stereoscopic image display apparatus [sixth embodiment])
Next, the operation of the stereoscopic video display apparatus 1E will be described with reference to the flowchart shown in FIG. 21 (see FIG. 18 as appropriate).
First, the stereoscopic video display device 1E projects the input elemental image group onto the first lens group 9 by the video projection unit 3 (step S51). Subsequently, the stereoscopic image display apparatus 1E transmits the light beam group by the first lens group 9 and the convex lens 5, reflects the light beam group by the plane mirror 11 (Step S52), A stereoscopic image is displayed by transmitting through one lens group 9 (step S53).

  The direction in which the angle θ is formed by the video projection means 3 and the first lens group 9 of the stereoscopic video display devices 1C, 1D, and 1E described in the fourth to sixth embodiments is shown in the drawing. Although it is set as the up-down direction, any direction of the left-right direction and the diagonal direction may be used.

  However, the pattern of the first lens group 9 (lens arrangement pattern) generates a shift of the interval p in the direction of attaching the angle θ, but if the entire pattern is shifted by the interval p in the direction of attaching the angle θ, It is necessary to satisfy the conditions that match the pattern. If this condition is satisfied, the direction for attaching the angle θ may be any direction. Further, the shift amount (interval) p is not the amount that the lenses are closest to each other, but may be the shift amount between two or three adjacent lenses. In this case, the angle θ is a large value.

  Further, instead of the convex lenses 5, 13, 15 used in the stereoscopic image display devices 1 to 1E and the concave mirror shown as an alternative configuration, a holographic optical element gives a light condensing action, thereby holographic optics. The element can be used as an optical element having a transmissive or reflective condensing function.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. For example, in the present embodiment, regarding the formation of the viewing zones, only the viewing zones shown in the drawing, that is, the designed viewing zones are formed, and adjacent viewing zones other than the correct viewing zones do not occur. In general, a stereoscopic image that is strictly geometrically incorrect is reproduced in the adjacent viewing zone, and so-called reverse viewing occurs when a viewer observes a stereoscopic video across multiple viewing zones. The fact that the adjacent viewing zone does not occur can prevent such a phenomenon.

It is the figure which showed the outline of the three-dimensional video display apparatus (1st embodiment) which concerns on embodiment of this invention. It is a figure for demonstrating a series of effects | actions (the advancing direction of a light ray group, etc.) of a three-dimensional video display apparatus (1st embodiment). It is the flowchart which showed operation | movement of the three-dimensional video display apparatus (1st embodiment) shown in FIG. It is the figure which showed the outline of the three-dimensional video display apparatus (2nd embodiment) which concerns on embodiment of this invention. It is a figure for demonstrating a series of effects | actions (the advancing direction of a light ray group, etc.) of a three-dimensional video display apparatus (2nd embodiment). It is the flowchart which showed operation | movement of the three-dimensional video display apparatus (2nd embodiment) shown in FIG. It is the figure which showed the outline of the three-dimensional video display apparatus (3rd embodiment) which concerns on embodiment of this invention. It is a figure for demonstrating a series of effects | actions (traveling direction etc. of a light ray group) of a three-dimensional video display apparatus (3rd embodiment). It is the figure which showed the variation of the convex lens in a three-dimensional video display apparatus (3rd embodiment). It is the flowchart which showed operation | movement of the three-dimensional video display apparatus (3rd embodiment) shown in FIG. It is the figure which showed the outline of the three-dimensional video display apparatus (4th embodiment) which concerns on embodiment of this invention. It is a figure for demonstrating a series of effects | actions (the advancing direction etc. of a light ray group) of a three-dimensional video display apparatus (4th embodiment). It is the figure shown about the visual field in a three-dimensional video display apparatus (4th embodiment). 12 is a flowchart showing an operation of the stereoscopic video display apparatus (fourth embodiment) shown in FIG. 11. It is the figure which showed the outline of the three-dimensional video display apparatus (5th embodiment) which concerns on embodiment of this invention. It is a figure for demonstrating a series of effects | actions (the advancing direction etc. of a light ray group) of a three-dimensional video display apparatus (5th embodiment). 16 is a flowchart showing an operation of the stereoscopic video display apparatus (fifth embodiment) shown in FIG. It is the figure which showed the outline of the three-dimensional video display apparatus (6th embodiment) which concerns on embodiment of this invention. It is a figure for demonstrating a series of effects | actions (the advancing direction of a light ray group, etc.) of a three-dimensional video display apparatus (6th embodiment). It is the figure which showed the variation of the convex lens in a three-dimensional video display apparatus (6th embodiment). It is the flowchart which showed operation | movement of the three-dimensional video display apparatus (6th embodiment) shown in FIG. It is the schematic of the conventional IP apparatus. It is the schematic of the conventional IP apparatus. It is the schematic of the conventional IP apparatus. It is the figure shown about the visual field by the conventional IP apparatus. It is the figure shown about the visual field by the conventional IP apparatus.

Explanation of symbols

1, 1A, 1B, 1C, 1D, 1E 3D image display device 3 Image projection means 5, 13, 15 Convex lens (lens)
15a Concave mirror 7 Half mirror 9 First lens group 11 Plane mirror

Claims (6)

Reflecting through a projecting optical path from the image projection means for projecting an element image group consisting of a plurality of element images for constituting a stereoscopic image by the integral photography method to the plane mirror arranged at a predetermined position, the plane mirror a stereoscopic image display device having a viewing light path to an observation position for observing the stereoscopic image from,
On the optical path, a light beam group constituting the element image group is incident and is emitted to the plane mirror, and is disposed at a position to emit the light beam group reflected from the plane mirror toward the observation position. A first lens group in which a field lens corresponding to the element image and a plurality of lens systems acting as element lenses are arranged on one plane;
A lens that is arranged at a predetermined position on the light path to be projected , and that forms a light ray group that forms the element image group, and whose principal light rays are light groups that are parallel to each other in the light path to be projected. Prepared ,
The optical path is an optical path for projecting from the image projection unit to the plane mirror by an angle θ formed by an optical axis of the image projection unit and a plane formed by the plane reflection mirror;
A stereoscopic image display device comprising: an optical path that is incident on the angle θ and is reflected from the plane mirror to observe the observation position . Reflecting through a projecting optical path from the image projection means for projecting an element image group consisting of a plurality of element images for constituting a stereoscopic image by the integral photography method to the plane mirror arranged at a predetermined position, the plane mirror a stereoscopic image display device having a viewing light path to an observation position for observing the stereoscopic image from,
On the optical path, a light beam group constituting the element image group is incident and is emitted to the plane mirror, and is disposed at a position to emit the light beam group reflected from the plane mirror toward the observation position. A first lens group in which a field lens corresponding to the element image and a plurality of lens systems acting as element lenses are arranged on one plane;
The light beam group arranged at a predetermined position on the optical path and forming the element image group is a light beam group in which the principal rays of the light beam group are parallel to each other in the light path to be projected and reflected from the reflecting mirror to perform the observation. comprising a lens for a ray group for focusing in the optical path of the,
The optical path is an optical path for projecting from the image projection unit to the plane mirror by an angle θ formed by an optical axis of the image projection unit and a plane formed by the plane reflection mirror;
A stereoscopic image display device comprising: an optical path that is incident on the angle θ and is reflected from the plane mirror to observe the observation position . From the image projecting means for projecting an elemental image group including a plurality of elemental images for constituting a stereoscopic image by integral photography method, and reflected through the optical path for projecting up to the concave mirror which is disposed at a predetermined position, the concave mirror a stereoscopic image display device having a viewing light path to an observation position for observing the stereoscopic image from,
On the optical path, the light beam group forming the element image group is incident and is emitted to the concave mirror, and is disposed at a position to emit the light beam reflected from the concave mirror toward the observation position, A first lens group in which a field lens corresponding to the element image and a plurality of lens systems acting as element lenses are arranged on one plane,
The optical path projects from the image projection means to the concave mirror by an angle θ formed by the optical axis of the image projection means and the plane formed by the first lens group;
A stereoscopic image display apparatus comprising: an optical path that is incident on the angle θ and is reflected from the concave mirror to observe the observation position . From the image projection means for projecting an element image group consisting of a plurality of element images for constituting a stereoscopic image by the integral photography method , the direction of the optical path is determined by the half mirror via a half mirror and a plane mirror arranged at a predetermined position. A stereoscopic image display device having an optical path to the observation position of the stereoscopic image that is reflected by the plane mirror and is transmitted again through the half mirror,
On the optical path, a light beam group constituting the element image group is incident and is emitted to the plane mirror, and is disposed at a position to emit the light beam group reflected from the plane mirror toward the observation position. A first lens group in which a field lens corresponding to the element image and a plurality of lens systems acting as element lenses are arranged on one plane;
A lens that is arranged at a predetermined position on the optical path from the image projection means to the half mirror and that forms the element image group, and whose principal rays are parallel to each other in the optical path. A stereoscopic video display device comprising: From the image projection means for projecting an element image group consisting of a plurality of element images for constituting a stereoscopic image by the integral photography method , the direction of the optical path is determined by the half mirror via a half mirror and a plane mirror arranged at a predetermined position. A stereoscopic image display device having an optical path to the observation position of the stereoscopic image that is reflected by the plane mirror and is transmitted again through the half mirror,
On the optical path, a light beam group constituting the element image group is incident and is emitted to the plane mirror, and is disposed at a position to emit the light beam group reflected from the plane mirror toward the observation position. A first lens group in which a field lens corresponding to the element image and a plurality of lens systems acting as element lenses are arranged on one plane;
Is arranged at a predetermined position on the optical path to the viewing position from said plane mirror, a group of light beams forming the element images, the principal ray of the light beam group, and parallel light ray groups to each other in the optical path towards the plane mirror from the half-mirror A stereoscopic image display apparatus comprising: a lens that is a light beam group that is collected in an optical path reflected from the reflecting mirror toward the observation position . From the image projection means for projecting an element image group consisting of a plurality of element images for constituting a stereoscopic image by the integral photography system , the direction of the optical path is determined by the half mirror via a half mirror and a concave mirror arranged at a predetermined position. A stereoscopic image display device having an optical path to the observation position of the stereoscopic image that is reflected by the concave mirror and then transmitted again through the half mirror,
On the optical path, the light beam group forming the element image group is incident and is emitted to the concave mirror, and is disposed at a position to emit the light beam reflected from the concave mirror toward the observation position, A stereoscopic image display device comprising: a first lens group in which a field lens corresponding to the element image and a plurality of lens systems acting as element lenses are arranged on one plane.

Images