JP3361023B2 - Video presentation device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image presenting device for allowing an observer to perceive an image with a sense of depth.

[0002]

2. Description of the Related Art A method of presenting a video with a sense of depth to humans is the "binocular parallax method" in which two types of video for the left and right eyes are prepared as in the case of human viewing with both eyes. 2 of the "pseudo volume method" that actually presents a video with a physical depth
It is roughly divided into types (these terms are not authorized common words, but similar and different words may be used).

Of these, the "binocular parallax system" requires special means for independently presenting the prepared left and right eye images to the corresponding eyes of the observer. (1) Both eyes of the observer "HMD (Head)
(Mount Display) type, (2) "Orthogonal modulation / demodulation, in which left / right eye images are subjected to modulation of orthogonal phase characteristics such as blue / red hue modulation and vertical / horizontal polarization modulation, and demodulated by colored glasses or polarized glasses. Type "and (3)" separation optical system type "in which images for the left and right eyes are presented to each eye by a lenticular lens or a pupil tracking optical system. All are prepared as a source image in a predetermined manner. It is two left and right eye images taken from different viewpoints with parallax, and images obtained by processing these images, and the perception of depth depends on the recognition process in the brain.

FIG. 16 shows a conventional example of a "quadrature modulation / demodulation" image presenting device for presenting left and right eye images which are polarization-modulated in a phase orthogonal to each other from a rear screen. In the image presenting apparatus of this example, the images for the left and right eyes from the image information recording apparatus 111 in which the source images for the left and right eyes having parallax are recorded are independently projected by the projectors 112L and 112R.
Is projected onto the transmissive screen 113.

The projectors 112L and 112R are equipped with a left-eye image modulation filter 114L and a right-eye image modulation filter 114R, respectively. The left-eye image 115L and the right-eye image 115R on the screen 113 are It is modulated by polarized light (vertical / horizontal or right / left rotation) and hue (blue / red) so that the left and right are orthogonal.

An observer 116 facing the screen
Wears glasses having left-eye and right-eye image demodulation filters 117L and 117R that allow only the image on the side to pass, so the image for the left eye and the image for the right eye reach only the eye on the side. However, this observer 116 feels the image 118 at the position of the broken line in the figure. The left and right eye images 115L,
If the parallax of 115R is different, the formation position of the sensed image 118 is also different. The images for the left and right eyes per screen are composed of a number of regions with different parallax, so that the observer can obtain images at various different positions at the same time, and obtain images with a sense of depth. You will be observing.

The above-mentioned "separation optical system type" using the lenticular lens and the pupil tracking optical system prepares an optical system having an optical path through which the images for the left and right eyes reach the eyes on the side concerned, so that a sense of depth is obtained. The sensation principle is the same as described above.

On the other hand, the "pseudo-volume method" forms a real image or a virtual image with a feeling of depth in front of the eye. Typical examples thereof include a modified "holographic type" and a "vibrating screen type". ing.

Among them, in the "holographic type", in addition to the method of applying reference light to a continuous hologram film on which interference fringes are recorded according to the principle of holography, a method of forming hologram data on an LCD, an acousto-optical element ( AO
There is a method of allowing laser light to pass through and interfere with the diffraction grating according to M).

FIG. 17 shows a conventional example using the AOM.
The AOMs 121R, 12lG, 12lB are composed of a crystal part and a piezoelectric part. When this piezoelectric part is driven at a high frequency based on the calculation result of the computer 122, a traveling wave corresponding to the drive frequency is generated inside the crystal of these AOMs. Therefore, here each A
When the red laser 122R, the green laser 122G, and the blue laser 122B are applied to the OM, the OM is diffracted by the change in the refractive index of the crystal part due to the traveling wave, and if the state of this diffraction is controlled by the change in the driving frequency, the OM becomes a hologram. It is possible to reproduce the holography. Then, the holography by the lasers of the respective colors is combined on the same optical axis by the beam combiner 123 in which half mirrors are connected in series to reproduce the color holography.

However, this holography is only a line image because the AOM is a one-dimensional hologram, and by scanning with the galvano mirror 124 and the polygon mirror 125,
The observer 126 feels holography with a normal volume.

FIG. 18 shows a conventional example using an LCD.
The basic principle of this example is the same as that shown in FIG. 17, but an LCD is used for the medium instead of the AOM as the hologram forming medium as in the previous figure.

The computer 131 sends a hologram pattern so that a hologram pattern is formed on the LCDs 132A and 132B, and the output of the laser 133 is the mirror groups 134 to 13.
The holography of each small area is formed by interfering with the pattern on the LCD via 6. These are fixed mirrors 1
Composited on 37, the observer 138 perceives large area holography. In the present example, when it is desired to make the hologram surface large, the number of small area LCDs is increased or the movable mirror 134 scans to change the incident angle with respect to the observer.

The "vibrating screen type" takes an image of an object reflected by a film-shaped mirror vibrating at about 1 KHz and projects it on a screen vibrating in synchronization with the vibrating mirror to reproduce physical depth information. Is the way to do it.

FIG. 19 shows a conventional example of a vibrating screen type. The object light half mirror 142 from the observation target 141 is guided to the photographing vibrating mirror 143, and the reflected light is reflected by the camera 1.
Photographed at 44. The image modulated by the photographing vibrating mirror 143 is projected onto the observing vibrating mirror 146 by the projector 145. Since the above-mentioned photographing vibrating mirror, camera, projector, and observation vibrating mirror are controlled synchronously by the synchronizer 147, an image photographed in a deformed state with the vibrating mirror for photographing is a vibrating mirror for observation. Projected in the corresponding deformed state of. Since these vibration states are controlled so as to focus in the depth direction of the observation target 141, the observer 148
The sensation image 149 seen by the user also becomes an image having a corresponding depth.

[0016]

As described above, various systems for presenting an image with a sense of depth to the observer have been put into practical use. However, the above-mentioned method has the following problems.

First, in the "binocular parallax system", since the left and right eye images used are planar images, the binocular parallax is mainly used for humans to obtain a sense of depth.
The focus adjustment function of the crystalline lens that occurs when observing an actual object is not used. Therefore, since the observation state is different from that of natural vision, discomfort and fatigue occur during observation, and it is difficult to obtain a sense of depth when the eyes of one eye and the eyesight of both eyes are greatly different.

In the method of observing holography of the "pseudo volume method", since a hologram of this recording form originally has innumerable interference fringes recorded at a pitch of about 1 μm, it is accurate in a continuous hologram film. The problem is the accuracy of the film feed to bring out Chiwa.
It is difficult to realize a mechanism for reproducing moving images with natural movement.

Further, in the system using LCD or AOM, the amount of calculation is very large because it is necessary to reproduce the interference fringes by calculation, and it is necessary to increase the density and the screen size due to problems in manufacturing the device. Since it is difficult to realize at the same time, it is impossible to reproduce complicated shapes. Further, regarding the method of using the laser, there is a problem in consideration of safety for the observer and the configuration of a high-speed scanning mechanism for scanning a linear image into a screen.

The method of using the vibrating screen is basically equivalent to placing a film on the speaker. Therefore, when used in the air, sound waves are generated by the screen that vibrates at high speed, and it is difficult to use the sound effect together.

Further, it is premised that the observation target imaged by the photographing vibrating mirror is an object having depth information, and in order to reproduce and observe the information recorded on the recording medium, the above-mentioned holography method or the like is used. It is indispensable to use it together with a means that can spatially reproduce depth information. Furthermore, when the photographic vibrating mirror is focused at a certain depth position of the observation object, the other reproduction depth images of the observation object are also blurred, but the reproduced image is always transparent (transparent). Target).

The present invention has been made to solve the above-mentioned problems of the prior art. (1) The function of the eye on which the feeling of depth is based can be utilized in a state similar to natural vision, (2) It is possible to perceive an image that is not transparent (transparent) but has a sense of reality, (3) a large-screen and high-density image can be obtained, and (4) it is possible to play a movie with a high update rate. Therefore, there is provided a video presenting device capable of (5) not interfering with acoustic effects and (6) satisfying the condition that a safe light source can be used for an observer's eye. The purpose is to provide.

[0023]

In order to achieve the above object, the present invention provides a video presenting apparatus for projecting a plurality of divided images so that real images corresponding to the divided images are overlapped with each other when viewed from the optical path direction. Source image projecting means for forming images at different positions in the optical path direction with different positional relationships, and the divided images are a plurality of regions formed by partitioning a space in which the object to be presented is present along the depth direction. Source image projecting means for expressing the presenting objects respectively present, a cylindrical concave mirror for reflecting the image light of each of the divided images and guiding the image light to an observer ,
The optical path between the source image projection means and the cylindrical concave mirror
A cylindrical lens disposed on the above,
The cylindrical lens expands the divided image in the first direction.
The cylindrical concave mirror displays the divided image in the first direction.
It is characterized in that it is arranged so as to expand in a second direction orthogonal to .

According to the present invention, the image light of each divided image emitted from the source image projecting means forms a real image at different positions in the optical path direction. The image light is reflected by the concave mirror and guided to the observer, who perceives a virtual image magnified by the concave mirror behind the concave mirror or a real image in front of the concave mirror.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

First Embodiment First, the first embodiment will be described. 1 to 11 are views showing a first embodiment of the present invention.

As shown in FIG. 1, the video presentation apparatus observes the source image projection means 10 for projecting a source image composed of a plurality of divided images, and the image light of each divided image projected by the source image projection means 10. Cylindrical concave mirror 30 leading to the person 2
It has and. In the present specification, the cylindrical concave mirror has a shape in which its reflection surface is obtained by cutting out a part of the inner peripheral surface of the cylinder along a generatrix (a line parallel to the axis of the cylinder), as shown in FIG. Means a concave mirror having.

The image presentation device also has a plane reflecting mirror 25 for guiding the image light from the source image projecting means 10 to the cylindrical concave mirror 30. The image light emitted from the source image projection means 10 and passing through the plane reflecting mirror 25 and the cylindrical concave mirror 30 to reach the observer 2 forms an optical path A. Although the optical path A means an optical path having a predetermined width formed by the image light, strictly speaking, the center of such an optical path is referred to as the optical path A in this specification.

Between the source image projecting means 10 and the plane reflecting mirror 25 on the optical path A, a cylindrical lens 20 for horizontally enlarging the image light of each divided image emitted from the source image projecting means 10 is provided. ing.

The source image projecting means 10 on the optical path A is also provided.
Between the lens and the cylindrical lens 20, a correction optical system 1
5 are provided. The correction optical system 15 performs optical matching between the source image projection means 10 and the optical system after the correction optical system 15, and has an appropriate configuration according to the specifications of the optical system that constitutes the image presenting apparatus. Used.

The reason why the concave mirror is made cylindrical in the present embodiment is to realize a large screen that can be used in a theater or the like by means of this image presenting apparatus. The concave mirror used in the present embodiment does not have to be as highly accurate as that for optical measurement, but in any case, a large-diameter concave mirror is not practical for production or installation.

That is, from the viewpoint of eliminating aberration, only the central portion of the concave mirror can be used. Therefore, it is necessary to prepare a concave mirror that is considerably larger than the size of the region actually involved in the reflection of the image light. It is difficult to prepare a concave mirror of such a size. In addition, when the concave mirror is actually installed, it is necessary to take an installation method that considers the deformation due to gravity, but when the reflecting surface of the concave mirror is a spherical surface, it is extremely difficult to manage such deformation. is there.

If the reflecting surface of the concave mirror is made cylindrical as in this embodiment, it is possible to achieve the same function as a concave mirror having a spherical reflecting surface by combining with the cylindrical lens 20. Further, the tubular reflecting surface is easier to manufacture than the spherical reflecting surface. Furthermore, by setting the thrust axis (or generatrix) of the concave mirror in the horizontal direction (see FIG. 1) perpendicular to the gravity direction or in the same vertical direction as the gravity direction (see FIG. 14), the deformation of the reflecting surface due to gravity is prevented. Easy to manage. For the above reasons, the cylindrical concave mirror is used in this embodiment.

However, the problem as described above becomes apparent when a large-diameter reflecting surface is required, that is, when a large screen is to be presented. Therefore, when a relatively small screen is presented. In place of the cylindrical concave mirror 30, a concave mirror having a spherical reflecting surface may be used. In addition,
In this case, the cylindrical lens 20 becomes unnecessary.

In the video presenting apparatus having such a configuration, the image light of each divided image which is independently and simultaneously projected from the source image projecting means 10 is horizontally expanded by the cylindrical lens 20, and the plane reflecting mirror 25 is provided.
And is guided by the cylindrical concave mirror 30. Then, each image light forms a real image enlarged in the horizontal direction on the front side of the cylindrical concave mirror 30 on the optical path A. Further, each image light is reflected by the cylindrical concave mirror 30 and reaches the observer 2. As a result, the observer 2 enlarges in the vertical direction, and the virtual image having the aspect ratio substantially the same as the aspect ratio of the original divided image is cylindrical concave mirror 30.
To the back (or to the front side of the cylindrical concave mirror 30).

Then, the observer 2 forms a virtual image (a virtual image corresponding to each divided image) formed at a depth position in the back of the cylindrical concave mirror 30 in a different direction of the line of sight so as to overlap each other when viewed from the line of sight. The images are synthesized in the brain, and one can perceive it as one stereoscopic image with a sense of depth.

The octahedron Ra shown by the solid line in FIG. 1 is the image of the image projected from the swords image projecting means, and the octahedron Rb shown by the solid line is horizontally expanded through the cylindrical lens 20. An image of a real image formed in front of the cylindrical concave mirror 30 is shown, and an octahedron Q shown by a chain double-dashed line shows an image of a virtual image that the observer 2 feels.

The above is the basic principle of the present invention.
This will be described in more detail.

First, the source image projection means 10 will be described in detail. As shown in FIG. 1, the source image projection unit 10 has a plurality of projectors 11a to 11i. These projectors 11a to 11i are arranged adjacent to each other such that their optical axes point in the same direction.

Incidentally, in FIG. 1, each of the projectors 11a-11
Although i is aligned in the optical path A direction, the present invention is not limited to this, and the projectors 11a to 11i may be arranged in the optical path direction (in the front-rear direction of the optical path A) while being offset from each other. Further, although the number of projectors is nine in FIG. 1, the number of projectors is not limited to this, and may be more or less, but it is possible to improve the resolution of the presented image in the depth direction. Therefore, it is preferable to increase the number of projectors.

Each of the projectors 11a to 11i has a plurality of divided images formed by dividing the image to be presented in the depth direction (the definition of the term "divided image" and the method of generating the "divided image" will be described later. Each will be projected. Each projector 11a-11
The lens of i is such that the virtual images (or real images) formed based on the divided images from the projectors 11a to 11i overlap with each other when viewed from the optical path A direction, and the irradiation areas 13a to 13i of the projectors are included. (See FIG. 8) The angle of view and the focal length are such that overlapping portions occur.

As the projectors 11a to 11i, a method of directly projecting an image displayed on a CRT which emits light as a source image, or an LCD or film as a source image, and the LCD or film is illuminated by a backlight. By doing so, a method of projecting a source image or the like can be used.

As described above, it is preferable that the number of projectors is large. However, when the number of projectors is increased, when the projectors are collectively arranged as shown in FIG. The distance becomes large. As will be apparent from the description below, it is desirable to make the distance between the optical axes of the projector as small as possible. Therefore, as shown in FIG. 2, the projectors are divided into two groups 11A and 11B, and the half mirrors 12 coaxially combine the lights from the projectors of the projector groups 11A and 11B. You may comprise. With this configuration, the distance between the optical axes of the projector can be substantially reduced, and the overlapping portion of the irradiation ranges of the divided images can be increased. That is, the images projected from the respective projectors can be superimposed with almost no deviation.

Alternatively, a half mirror may be incorporated in each projector so that one projector projects two divided images.

Further, from the viewpoint of preventing glare of the image at the time of observation (achieving antiglare), it is preferable that the image light emitted from each projector is subjected to diffusion processing. Therefore, for example, in a backlight irradiation type projector, it is preferable to insert a transmissive diffusion plate between the light source (backlight) of the projector and the LCD or film (source image).

The source image projecting means 10 is controlled by the projector group control means 40 based on the image information to be projected provided by the image updating means 30 shown in FIG.

As shown in FIG. 3, the image updating means 30 includes a plane image holding means 31 for holding data relating to a plane image inputted from the outside, and a plane based on the data relating to the plane image received from the plane image holding means 31. A divided image generation unit 32 that analyzes depth information of an image and generates a divided image for each depth, a divided image holding unit 33 that holds each divided image for each depth generated by the divided image generation unit 32, and each division. It has a divided image correction means 34 for correcting the magnification of images and their mutual positional relationship.

Further, the image updating means 30 is a projector allocating means 35 for allocating each divided image to the projectors 11a to 11i.
And projector optical system variable setting means 36 for adjusting adjustable variables of the lenses of each of the projectors 11a to 11i, for example, variables such as diaphragm, magnification and focal length.

Further, depending on the number of divisions when generating divided images, one projector may be used for projecting a plurality of divided images, or a projector may not be used. It is necessary to adjust the update rate of the image projected by each projector per unit time according to these situations. Therefore, the image updating means 30 has a projector frame number setting means 37 in order to achieve the object.

The data representing the projection conditions calculated and set in the image updating means 30 is transmitted to the projector group control means 40, and the projector group control means 40 determines that each of the projectors 11a to 11i is proper based on this data. It is designed to project various divided images.

Next, the operation of this embodiment having such a configuration will be described. It should be noted that the image presented by the present image presentation device includes not only a still image but also a moving image, but in the following description, a case of projecting one frame of a still image or a moving image will be described for simplification of the description. To do. Therefore, in the case of a moving image, the projector frame number setting means 37 determines the image update rate and sequentially presents the images one by one.

The operation of this embodiment differs depending on the mode of the source image input to the image updating means 30. That is, when the source image input to the image updating unit 30 is already a divided image (for example, when the source image is obtained by the photographing device 70 shown in FIG. 15), the data of the source image is divided. It may be directly input to the image correction means 34, but when the source image input to the image update means 30 is a plane image (a general cinema film, a video tape, or a plane image as it is captured by an ordinary CCD). The plane image data is input to the plane image holding means 31, converted into digital data and temporarily held. The data of the plane image is transmitted frame by frame to the divided image generation means 32 in the next stage, and the divided image generation means 32 generates divided images projected by the projectors 11a to 11i.

As a method of obtaining the above-mentioned divided images, based on a plane image such as a photograph or the like, the size of each object image included in the plane image or the known size of the object shown in the plane image is used. The positional relationship between the objects may be estimated and calculated. Alternatively, the image capturing device 70 (see FIG. 15), which will be described later in the description of the fifth embodiment, may be used to obtain it directly.

In the following, the case where the plane image is as shown in FIG. 6A and the object to be presented is found to be the octahedron 8 as shown in FIG. 4 is analyzed. A method of creating divided images will be specifically described.

First, in the explanation, an XYZ orthogonal coordinate system is set as shown in FIG. The octahedron 8 has a square bottom surface on the YZ plane and has two quadrangular pyramids whose vertices are on the X axis. It should be noted that the divided images obtained below have the viewpoint 3 on the X axis by the observer.
It is created on the assumption that the octahedron 8 is viewed from a line of sight that coincides with the X axis.

First, as shown in FIG. 5, the depth direction (X
The octahedron 8 is cut by the division planes M1 to M4 that are parallel to the YZ plane and are arranged at intervals along the axial direction).

As will be understood from the following description, the better the number of divisions when generating divided images, that is, the number of division planes set, the better the stereoscopic image can be presented. Further, in view of human visual characteristics, defects closer to the viewpoint 3 in the presented image are more likely to recognize image defects such as distortion. Therefore, the spacing between the division planes should be closer to the viewpoint 3. Is preferred. However, in this description, the number of division planes is four for the sake of simplicity.

After setting the division planes in the above manner, first, an image showing the octahedron 8 on the front side (the X-axis positive direction) of the first division plane M1 (hatched in FIG. 6B) is added. Area). It should be noted that since there is no object in the area other than the hatched area in FIG. 6B, nothing is recorded. The first divided image P1 is a combination of the area where no object exists and the area where the image of the octahedron 8 is recorded. The data representing the first divided image P1 is D1.

Next, image data D2 representing the octahedron 8 on the front side of the second division plane M2 is recorded. Then, the data D1 is excluded from the data D2. The second divided image P2 is defined by D2-D1 (see FIG. 6C). Similarly, the octahedron 8 on the front side of the third division plane M3
Data D3 of the image representing is recorded. Then, the data D2 is excluded from the data D3. The third divided image P3 is defined by D3-D2 (see FIG. 6D).

Similarly, image data D4 representing the octahedron 8 on the front side of the fourth division plane M4 is recorded. Then, D3 is excluded from the data D4. The fourth divided image P4 is defined by D4-D3. Since the data D4 is all included in the data D3, the divided image P4
Contains no information about the octahedron 8 (see FIG. 6 (e)).

As can be understood from the above description,
The divided image is an image displaying the presentation target object included in the area defined by the adjacent division planes. In addition, in the divided image, only the part that is visually perceived when looking at the presented object from a certain set viewpoint is displayed,
The internal structure of the presented object is not displayed unless observed from the surface. Therefore, each of the divided images obtained as described above has no overlapping portion other than the contour line.

The divided images P1 to P4 generated by the divided image generating means 32 as described above are transmitted to the divided image holding means 33 and temporarily held, and then transmitted to the divided image correcting means 34 in the next stage. The correction of each divided image (magnification correction and position / phase correction) is performed so that the observer can perceive an image with a proper sense of depth in consideration of the optical system included in this video presenting apparatus. Of these, magnification correction not only uniformly enlarges the entire divided image (isotropic enlargement), but also enlarges only in the vertical or horizontal direction (anisotropic), and if necessary, for each part of the divided image. It also includes enlargement under different magnification conditions. Hereinafter, the correction process will be described in detail.

In order to give the observer 2 an image without distortion, a virtual image Q1 formed behind the cylindrical concave mirror 30 is formed.
To Q3 (the divided image P4 does not include image information, the virtual image Q4 corresponding to the divided image P4 is not formed) has a dimensional ratio (see FIG. 7) of the image portions of the divided images P1 to P3 (see FIG. 6B. ) To (d), the dimensional ratio of the hatched region) must be maintained. Further, the shapes of the virtual images Q1 to Q3 must be similar to the image portions of the divided images P1 to P3. Positional relationship of virtual images Q1 to Q3 with respect to the line-of-sight direction (interval between virtual images Q1 to Q3)
Must correspond to the positional relationship of the cutting planes M1 to M3 used when forming the divided images P1 to P3. In addition, each virtual image must be formed such that the contour lines of adjacent virtual images overlap each other.

The above-mentioned matters required for the virtual images Q1 to Q3 are expressed by the virtual images Q'1 to Q'indicated by broken line arrows in FIG.
It is' 3. In FIG. 9, desired virtual images Q′1 to Q ′ are displayed.
3 shows the shapes and dimensions of the real images R1 to R3 (the real images R1 to R3 correspond to the image Rb of the real image shown in FIG. 1) to be formed on the front side of the cylindrical concave mirror 30 and the mutual positional relationship. ing. The coordinate axes shown in FIG.
It corresponds to the coordinate axes shown in. These virtual images Q'1
To Q'3 are to be displayed within the viewing angle ψ of the observer, and are perceived by the observer when the virtual images Q'1 to Q'3 are formed outside the viewing angle ψ. Part of the image is missing.

Here, in each of the broken line arrows showing the virtual images Q'1 to Q'3, points L'1 to L'3 and points N'1 to N '.
‘3’ indicates the ends of the virtual images Q′1 to Q′3, and points M′1 to M′3 indicate the middle points of the broken line arrows Q′1 to Q′3.

Further, in the solid line arrows indicating the real images R1 to R3, the points L1 to L3, M1 to M3 and N1 to N3 are
Points L'1 to L'3, M'1 to M'3, N'1 to respectively
This is a point corresponding to N'3.

As shown in FIG. 9, desired virtual images Q'1 to Q '
′ 3, the real images R1 to R3 required to form
The following is required for R3.

First, it is necessary to make the sizes of the real images R1 to R3 different from each other. This means that the vertical magnification of each of the divided images P1 to P3 must be corrected in order of P1, P2, and P3 so that the enlargement ratio increases, and then projected.

Secondly, as can be seen from the fact that the length of the line L1M1 is longer than the length of the line M1N1 in the real image R1 (the same applies to the real images R2 and R3), at least for each of the divided images P1 to P3. It is necessary to perform correction at different magnifications with the point M1 as a boundary.

Thirdly, the real images R1 to R3 need to be formed on curved surfaces.

As described above, the following corrections are performed on each divided image in response to the requirements for the real images R1 to R3. As the correction method, an appropriate one may be selected according to the optical characteristics of each constituent element of this image presenting apparatus, the shape dimension, and the mutual arrangement mode. In addition to the correction method described below, an electrical image processing method or It is also possible to make corrections so as to satisfy the above-mentioned requirements by an optical method.

[First Correction Method] First, the tubular reflecting mirror 30.
Consider a case where the radius of curvature of is relatively large and the angle θ formed by the optical path A of the image light incident on the tubular reflecting mirror 30 and the optical path A of the image light exiting from the tubular reflecting mirror 30 is relatively small. . In this case, even if the real images R1 to R3 are made to be planar images without being curved, the curvature of the virtual images Q′1 to Q′3 formed and the discontinuity of magnification in the vertical direction are ignored for human observation. It will be possible.

Therefore, in this case, each of the virtual images Q'1 to Q'3
Of the real image R1
R3 may be corrected, and the real images R1 to R3 may be formed on a plane.

Therefore, as shown in FIG. 10, the curved arrow R
1 to R3 may be approximated by linear arrows R′1 to R′3, and the vertical magnification of each of the divided images P1 to P3 corresponds to the length ratio of the linear arrows R′1 to R′3. Can be corrected as follows.

However, in this case, curved arrows R1 to R3
Points M1 to M3 that are the position reference of
It is necessary to perform correction for changing the mutual positional relationship of the divided images P1 to P3 so that the positions are shifted to the positions of the midpoints M1a to M3a of '3.

[Second Correction Method] The second correction method is performed by further dividing each of the divided images P1 to P3 into a plurality of divided images (re-divided images). By projecting each of the subdivided images so as to form a real image at the positions indicated by arrows R1a to R1e in FIG.
1 can be expressed.

This method is effective when the application of the first correction method is not sufficient, for example, when a very large image is presented.

However, in carrying out this method, the number of subdivisions is limited by the number of projectors and the adjustable range of the optical system group. Therefore, even with this correction method, it is impossible to obtain a perfectly curved real image. Therefore, when the observation is hindered, the curvature radius of the cylindrical concave mirror 30 should be increased, and the cylindrical concave mirror 30 should be increased. It is effective to change the dimensional shape of the optical system so as to reduce the angle θ formed by the optical path A of the image light incident on the optical path A and the optical path A of the image light emitted from the cylindrical concave mirror 30.

Since the range covered by the angle of view of each projector is slightly shifted as shown in FIG. 8, correction for shifting the position of the image portion vertically and / or horizontally is also performed for each divided image. Is done.

In the description of the correction method, as shown in FIG. 9, a real image is formed on the cylindrical concave mirror 30 side from the position of the focal point F of the cylindrical concave mirror 30, and the observer is behind the cylindrical concave mirror 30. The case where the image (virtual image) is perceived was explained. On the other hand, when a real image is formed at a position farther than the position of the focal point F of the cylindrical concave mirror 30, the observer feels an image as if the observer jumped out of the cylindrical concave mirror 30 in front of the cylindrical concave mirror 30. It will be. In this case, since the sensed real image is an inverted image, correction must be performed in advance at a stage before the image light enters the cylindrical concave mirror 30,
The divided image correcting means 34 performs the inverted processing of the divided images in advance for each divided image. It should be noted that this correction is replaced with the correction optical system 1 instead of the calculation processing by the divided image correction means 34.
It may be performed by optical adjustment according to 5.

In reality, it is difficult to completely adjust the optical systems constituting the image presenting apparatus. Further, although this video presenting device is premised on that observation is performed from a preset viewpoint, the observer may slightly move from a predetermined position. In such a case, portions other than the contour portion of each divided image may overlap each other, or a gap may occur between the contour portions adjacent to each other. In particular, when a gap is generated, the observer feels a sense of discomfort in the image.

Therefore, it is preferable to display the non-divided whole image Pi at the back of the divided image displaying the deepest part. As shown in FIG. 5, this non-divided whole image Pi is divided into planes M.
The division plane Mi is set in the back of the division plane 4 and the data D5 of the image representing the octahedron 1 on the front side of the division plane Mi is recorded. This non-divided whole image Pi is the divided image P1.
Corresponds to a combination of ~ P4. (See FIG. 6 (f)).

Then, as shown in FIG. 7, the undivided whole image P
By projecting the non-division overall image Pi at the same time as each divided image so that the virtual image Qi corresponding to i is formed behind the virtual image corresponding to each divided image P1 to P4, the gap between the combined divided images is reduced. It can be interpolated. The same correction as the correction by the divided image correction unit 34 is performed on the non-divided entire image Pi.

If the non-divided whole image Pi is displayed in the same manner as each divided image, the non-divided whole image Pi may interfere with the divided images, which may hinder the perception of depth. It is preferable that the image Pi is achromatic or that the density of the image is reduced.

Each divided image corrected by the divided image correcting means 34 is assigned to each projector by the projector allocating means 35. In this case, since the number of divided images is 4, it is assigned to the projectors 11a to 11d, for example. When projecting the above-mentioned non-divided whole image Pi at the same time, the non-divided whole image Pi is assigned to another projector, for example, the projector 11e.

Next, the projector optical system variable setting means 36
The image light corresponding to each of the divided images P1 to P4 is finally placed behind the cylindrical concave mirror 30 at an appropriate position (see FIG. 7) different with respect to the line-of-sight direction of the observer, and the virtual images Q1 to Q3 (the divided image P4 is Because the image information is not included, the virtual image Q4 corresponding to the divided image P4 is not formed), the lens variables (aperture, magnification, focal length, etc.) of the projectors 11a to 11d are adjusted.

When the presented image is a moving image,
The projector frame number setting means 37 then sets the update rate of the image projected per unit time.

Then, each of the projectors 11a to 11d projects image light corresponding to each of the divided images P1 to P4. As a result, the observer 2 perceives the virtual images Q1 to Q3 corresponding to the respective divided images behind the cylindrical concave mirror 30, as shown in FIG. Then, the observer 2 synthesizes the virtual images Q1 to Q3 in the brain and perceives a deep image (octahedron Q shown in FIG. 1).

Since the resolution of the presented image in the depth direction depends on the number of divisions in the depth direction, that is, the number of divided images, the resolution in the depth direction basically depends on the number of projectors. However, if it is desired to obtain a resolution in the depth direction that is equal to or greater than the number of projectors, one projector may be made to handle a plurality of divided images.

For example, if the number of divided images is twice as many as the number of projectors, 2 should be presented at depth positions adjacent to each other.
One divided image may be set as one set, and one set may be assigned to each projector. Then, each of the projectors may sequentially project the front side divided image and the back side divided image. In this case, it is necessary to switch the focal position of the lens of each projector in accordance with this, but this processing may be performed by the projector optical system variable setting means 36. By sequentially projecting the front side divided image and the rear side divided image at a sufficiently short image update rate, the resolution in the depth direction can be improved without making the human eye feel uncomfortable.

In this video presenting apparatus, it is possible to add a sound effect with a sense of depth by accommodating the image information for each depth, that is, the information of the divided images with the audio information for each depth. That is, for example, as shown in FIG. 1, a speaker group is arranged in a region where a virtual image is formed along the line-of-sight direction, and the image update means 30 sends information of divided images for each depth to the projector control means 40, By sending the audio information to the speaker group control means 41 in synchronization with this, it is possible to simultaneously obtain a video with a sense of depth and a sound effect with a sense of depth that matches the image.

As described above, according to the present embodiment, a new "pseudo volume method" image presenting apparatus that utilizes both "binocular parallax" and "focus adjustment" of the crystalline lens as human visual functions is newly provided. A configuration can be realized. As a result, the observer can perceive an image with a feeling of depth that is closer to natural vision, and even if the eyesight of the two eyes of the observer is different, a certain degree of depth can be perceived. Becomes

Further, since the source image is observed vertically by the cylindrical concave mirror and horizontally by the cylindrical lens, it is possible to observe the depth image without depending on the size of the original source image. It is possible to magnify an image with a certain size to observe it.

Further, since only the area corresponding to each depth position is displayed and a plurality of divided images having no overlapping area other than the contour portion are overlapped to present an image, the holography or vibrating screen is displayed. The image is not transparent (feels transparent) as seen in the method.

Further, since a general film image, cathode ray tube image and LCD image can be used as the source image as they are, it is possible to present an image in a state where the image density of a normal plane image is maintained.

Further, since it is not necessary to use a hologram as a medium for presenting the source image, it is not necessary to use a laser as a light source. Therefore, it is possible to safely observe the image. Further, since it is not necessary to use a special element, the whole device can be easily manufactured. Furthermore, since no loud noise like the vibrating screen method is generated, it is possible to arrange a speaker corresponding to each position of the depth image to be realized.
You can also add a sense of acoustic depth.

Second Embodiment Next, a second embodiment will be described with reference to FIG. The second embodiment differs from the first embodiment in that the arrangement of the projectors 11 of the source image projecting means 10 is different and that additional components are provided due to this. Differently, the configuration after the cylindrical lens 20 is the same as that of the first embodiment. In the second embodiment, the description of the configuration after the cylindrical lens 20 will be omitted.

In this embodiment, each of the projectors 11a to 11i (see FIG. 1 for the reference numerals of the projectors) constituting the source image projecting means 10 has only the optical axis of the projector 11e arranged at the center. The optical axes of the other projectors 11a to 11d and 11f to 11i, which are arranged so as to coincide with the optical path A of the presentation device and are arranged around the projector 11e, intersect at a point P on the optical axis of the projector 11e. It is arranged in a relationship.

In the following, in order to facilitate the explanation, the projectors 11d, 11e and 11f in the middle stage are extracted and displayed in FIG.
Will be described. As shown in FIG. 12, the projector 11d and the projector 11f are arranged on both sides of the projector 11e so that their optical axes intersect at a point P on the optical axis A of the projector 11e. They are arranged symmetrically with respect to each other.

In the vicinity of the point P and on the projector side,
Projector 11e composed of a concave lens or a concave lens
A parallel proximity optical system 50 having an optical axis that coincides with the optical axis of (i.e., optical path A of the image display device) is provided. The parallel proximity optical system 50 includes the projectors 11d, 11e, 11
Lights representing the divided images, which are incident from f, are emitted in a state of being parallel to each other and close to each other.

In order to prevent the image light from being distorted when passing through the parallel proximity optical system 50, it is important that the image light is incident on a narrow region near the optical axis of the parallel proximity optical system 50. For this reason, in each projector, in order to reduce the divided image light projected from each projector and prevent the divided image light from spreading on the way to the parallel proximity optical system 50, the magnification changing parallel optical system is used. A system 51 is provided.

On the opposite side of the parallel proximity optical system 50 from the projector, a correction optical system 15 and a cylindrical lens 20 are sequentially arranged. The divided image lights emitted from the respective projectors and passed through the parallel proximity optical system 50, the correction optical system 15 and the cylindrical lens 20 pass through the reflecting mirror 25 and the cylindrical concave mirror 30 in the same manner as in the first embodiment. Go through sequentially. Then, the observer senses a deep image on the back side or the front side of the cylindrical concave mirror 30.

According to this embodiment, the projectors can be arranged at intervals. Therefore, the size of the light source mechanism of the projector and the source image supply mechanism are large,
Even if it is difficult to make the projector compact,
The optical axes of each projector can be substantially close together.

Third Embodiment Next, a third embodiment will be described with reference to FIG. The third embodiment is different from the second embodiment in the configuration of the source image projecting means, and is otherwise substantially the same as the second embodiment. In the third embodiment, the same parts as those in the second embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 13, the source image projecting means 60 has a cathode ray tube 61 as an example of an integrated image presenting medium. The cathode ray tube 61 is configured to display the divided images in different areas of the display surface 62. That is, the display surface 62 of the cathode ray tube 61 has a display area 62b whose center coincides with the optical path A of the image display device, and display areas 62a and 62c located on both sides of the display area 62b.

The central display area 6 of the display surface 62 is also used.
Wedge prisms 63a and 63c are provided as an example of the optical axis refracting means on the surfaces of the display areas 62a and 62c other than 2b. The wedge prisms 63a and 63c intersect the optical axes of the divided image lights projected from the display areas 62a and 62c, respectively, at a point P on the optical path A of the image display device, as in the third embodiment. To refract.

Further, a parallel proximity optical system 50 is arranged on the front side of the point P at the same position as in the third embodiment.

Furthermore, wedge prisms 53a and 5a
A magnification changing parallel optical system 51 is provided at the tip of 3c and the tip of the central display area 62b.

Fourth Embodiment Next, a fourth embodiment will be described with reference to FIG. In the fourth embodiment, one video presenting device is configured by combining a plurality of video presenting devices described in the first embodiment. In the fourth embodiment, the same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 14, the video presenting apparatus 1 according to the fourth embodiment is composed of the video presenting apparatuses 1a, 1b, 1c according to the first embodiment.
The cylindrical concave mirrors 30 of the respective image presenting devices 1a, 1b, 1c are arranged adjacent to each other. In addition, each cylindrical concave mirror 30
The generatrix of is oriented in the vertical direction, and the cylindrical concave mirror 30 enlarges the image in the horizontal direction.

Accordingly, each of the image presenting devices 1a, 1b,
The cylindrical lens 20 of 1c is arranged such that the generatrix thereof is oriented in the horizontal direction, and the cylindrical lens 20 is adapted to enlarge the image in the vertical direction.

The image light projected from the source image projecting means 10 of each image presenting apparatus 1a, 1b, 1c forms optical paths Aa, Ab, Ac reaching the observer 2 through the cylindrical lens 20 and the cylindrical concave mirror 30, respectively. To do. Therefore, the observer 2 can see the same image at a plurality of different observation points.

As described above, according to the present embodiment, it is possible to provide the image presenting apparatus 1 that allows a plurality of people to observe. That is, when only one image presenting apparatus 1a is used, when the observer's viewpoint position deviates from a predetermined position, the contour lines of the respective divided images that should be originally matched are deviated or observed as described above. There is a tendency for a phenomenon that an image perceived by a person is distorted. This means that, particularly when the cylindrical concave mirror 30 is small, the range in which a good image can be observed is narrowed and the number of observers is limited. However, according to this embodiment, since there are a plurality of places where good images can be observed, a plurality of people can each observe good images. Further, by increasing the number of the image presenting devices 1a, 1b, 1c, it becomes possible for a larger number of people to observe the image.

Furthermore, each of the image display devices 1a, 1b, 1c
Different images are projected from the source image projecting means 10 of each of the cylindrical concave mirrors 30 by one observer changing the observation position.
By viewing, for example, images of an object taken from various angles are presented to the image presentation devices 1a, 1b, 1c, respectively, it is possible to look around the object. Becomes

Fifth Embodiment Next, a fifth embodiment will be described with reference to FIG. The fifth embodiment shows an embodiment of a photographing device suitable for photographing a source image used in the video presenting device described so far.

As shown in FIG. 15, a photographing device 70 includes an image forming means 71 having a lens 72 and a diaphragm 73, a polygon mirror 74, and three CCDs (charge coupled devices) 75a and 75b as image pickup elements. And 75c.

Of these, the lens 72 is a large-diameter, bright lens, that is, a lens having a shallow depth of focus. This lens 72 has a focus adjusting mechanism.

The polygon mirror 74 has a plurality of reflecting surfaces 74.
It has a to 74e, and is configured to rotate about the rotation shaft 74x.

Further, the rotating shaft 74x and the reflecting surfaces 74a to 74
4e, positional relationship with the rotating shaft 74x and each CCD 75
The positional relationship between a, 75b, and 75c is (1) the distance between the rotating shaft 74x of the polygon mirror 74 and the reflecting surfaces 74a to 74e is different from each other, and the rotating shaft 74x and each CCD are different.
The relationship that the distances between the image pickup surfaces of 75a, 75b, and 75c are different from each other is established.

The positional relationship is not limited to the above relationship (1), but (2) the rotating shaft 74x and each reflecting surface 74.
a to 74e are different from each other, and the rotation axis 7
4x and the image pickup surfaces of the CCDs 75a, 75b, and 75c are equal to each other, (3) The rotation axis 74x and the reflection surfaces 74a to 74e are equal to each other, and the rotation axis 74x and the CCDs 75a and 75c are the same. The distance between the imaging surfaces of 75b and 75c may be different from each other, and the relationship may be established.

Even if the above-mentioned positional relationship is changed, the image pickup object 85 passes through the reflecting surface of the polygon mirror 74 and the CCD.
Only the number of combinations of the optical path lengths to the image pickup surface is different, and the operation principle of the imaging device 70 is not different. In the present embodiment, the relationship (1) that maximizes the number of combinations of optical path lengths is adopted.

Further, the CCD 75a, 75b, 75c is connected to a signal holding means 76 for temporarily storing the signals photoelectrically converted by these CCDs. further,
A divided image forming means 77 and a non-divided whole image forming means 78 are sequentially connected to the signal holding means 76, and a video transmission means 79 is connected to the divided image forming means 77 and the non-divided image forming means 78. .

Further, the image forming means 71 is connected with a focus / diaphragm control means 80 for controlling the focal position of the lens 72 and the aperture value of the diaphragm 73. Also, the polygon mirror 7
The operation of No. 4 is controlled by the optical path switching control means 81.

The signal holding means 76, focus / aperture control means 80 and optical path switching control means 81 are controlled by a predetermined clock signal generated by the synchronization control means 82.

Next, the photographing device 7 having such a configuration
The operation of 0 will be described.

The object light from the object to be imaged 85 is formed by the image forming means 7.
1 and the polygon mirror 74, and reaches the image pickup surface of any of the CCDs 75a, 75b, and 75c through the reflecting surface.

First, the in-focus position of the lens 72 is adjusted so that the object light from a portion of the object to be imaged 85 having a predetermined distance from the lens 72, for example, a portion corresponding to point P2 in FIG. CCD 75a, 75 through one of the reflecting surfaces of the mirror 74, for example, the reflecting surface 74a.
One of the image pickup surfaces b and 75c, for example, the CCD 7
The image pickup surface of 5a is focused.

When the diaphragm 73 is opened, the depth of focus of the lens 72 is very shallow. Therefore, only the portion of the object to be imaged 85, which passes through the cutting line passing through the point P2, and a small portion of its periphery are the CCD 75a. A sharp image is formed on the imaging surface. On the other hand, the other part of the imaging target 85 is captured by the CCD 75a in a so-called out-of-focus state. That is, in this state, the lens 72 moves the imaging target object 85.
14 to the image pickup surface of the CCD through the image forming means 71 and the reflecting surface of the polygon mirror 74 (the “total optical path length” means the length of the line segment P2Q and the length of the line segment QR in FIG. 14). It means that the image is formed on the image pickup surface of the CCD only when the condition that the total of the optical path lengths corresponding to the above is satisfied.

Here, when the polygon mirror 74 is rotated so that the partial light from the image pickup object 85 enters the CCD 75b, for example, the part of the image pickup object 85 where the total optical path length equal to the total optical path length is obtained. , For example, only a portion passing through the cutting line passing through the point P3 and a small portion around it are C
A sharp image is formed on the image pickup surface of the CD 75a.

By thus selecting the CCD that guides the object light by rotating the polygon mirror 74 and changing the optical path length QR between the polygon mirror 74 and the CCD, different parts of the object to be imaged 85 from each other are selected. Can be selectively and sharply imaged on the image pickup surface of one of the CCDs.

In addition to the above, the focus adjustment mechanism of the lens 72 is used to perform multi-step adjustment of the in-focus position of the object light, and this multi-step adjustment of the lens 72 is performed by selectively rotating the optical path length QR by rotating the polygon mirror 74. By combining these changes, it is possible to obtain an image in which the imaging target object 85 is further finely divided in the optical path A direction (that is, the depth direction).

The photographing device 70 is controlled as follows based on the operating principle described above. That is, each CCD
The video signal from is temporarily stored by the signal holding means 76 and then sequentially transmitted to the divided image forming means 77 of the next stage. This transmission timing is determined based on the clock signal transmitted from the synchronization control means 82.

The divided image forming means 77 leaves only the data of the sharply formed portion of the obtained image,
A calculation is performed to remove data in the so-called out-of-focus area.

Next, as described in the first embodiment, the divided image forming means 77 preliminarily corrects the essential distortion of the perceived image due to the configuration of the optical system of the image presenting apparatus. As described above, the correction calculation of the reference position of the image is performed.

Next, the non-divided overall image forming means 78 performs the first operation by performing an operation for synthesizing the divided images for each depth.
The non-divided whole image described in the embodiment is combined.

It should be noted that instead of the method of synthesizing the divided whole images for each depth, the diaphragm 73 of the image forming means 71 is sufficiently narrowed,
A non-divided whole image may be obtained by capturing an image in a state where the depth of focus of the entire image forming unit 71 is sufficiently deep. How to obtain the non-divided whole image may be properly selected according to the type of the object to be photographed, and this selection is executed by the non-divided whole image forming means 78.

The data of the divided image (and the non-divided whole image) formed by the divided image forming means 77 and the non-divided whole image forming means 78 is transmitted to the image presenting apparatus 1 via the image signal transmitting means 79, and the data is transmitted. Video presentation device 1
As a result, an image with depth can be obtained. The divided image signal to be sent to the video signal transmitting means 79 may be stored in an appropriate recording medium.

The image (divided image) for each depth acquired by the image pickup device is selected by the signal holding means 76 as described above, but the lens / aperture is adjusted by the focus / aperture control means 80, and the polygon The intermittent rotation control of the mirror is performed by the optical path switching control means 81. In order to realize an appropriate combination of these elements, the above-mentioned respective means are accurately synchronized by the synchronization control means 82.

By the way, CC used as an image sensor
Since D can capture an image in a short time of about 1/1000 second, even when the polygon mirror is rotated at high speed,
Each CCD can fully cooperate with the polygon mirror 74. Then, by transmitting the image obtained by each CCD to the signal holding means 76 and temporarily storing it, it is possible to capture an image for each depth substantially in real time.

For example, NTSC (National Television)
Assuming an image update rate based on the System Comitee method, the time per frame is 1/30 second. Here, switching the reflective surface of the polygon mirror to 1 /
If it is performed in 1000 seconds or less (for example, the number of reflecting surfaces of the polygon mirror is 16 and the polygon mirror 3600r is
(It is possible when rotated at pm), and when the number of CCDs is n, it is possible to obtain an image for each depth of 33 × n.

Actually, the number of images to be obtained is limited by the performance of the lens and the speed of processing the image signal from the CCD, but even if this is the case, a practical resolution sufficient in the depth direction is obtained. It is possible to achieve.
Further, as described above, by combining the multi-step adjustment of the focal position of the lens, the resolution in the depth direction can be further enhanced.

As described above, according to this embodiment,
As a photographing method, a method of forming a variety of optical path lengths by using a deformed polygon mirror, a plurality of image pickup elements, and a movable lens having a shallow depth of focus, and thereby photographing an object to be photographed so as to scan in the depth direction is used. As a result, a divided image having a sufficient depth resolution can be obtained by real-time shooting.

Further, by cooperating with the image presenting apparatus shown in the first embodiment, real-time observation of an image with a sense of depth, which is impossible by holography, becomes possible.

[0144]

As described above, according to the present invention,
An image presenting device capable of utilizing a function of the eye, which is a base for obtaining a sense of depth, under the same condition as natural vision, and obtaining a substantial image, thereby realizing a large screen and high density image. Can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of an image presenting apparatus according to the present invention.

FIG. 2 is a diagram showing another arrangement mode of the projector.

FIG. 3 is a diagram showing a configuration of a control system of the image presentation device.

FIG. 4 is a diagram illustrating a method of generating divided images.

FIG. 5 is a diagram illustrating a method of generating divided images.

FIG. 6 is a diagram illustrating a method of generating divided images.

FIG. 7 is a diagram showing a virtual image formed as a result of projecting divided images. The X axis in this figure corresponds to the optical path A connecting the observer 2 and the cylindrical concave mirror 30 in FIG.

FIG. 8 is a diagram showing the overlap of the angle of view of each projector.

FIG. 9 is a diagram illustrating a correction process of divided images.

FIG. 10 is a diagram illustrating a correction process of divided images.

FIG. 11 is a diagram illustrating a correction process of divided images.

FIG. 12 is a diagram showing a second embodiment of an image presenting apparatus according to the present invention, and is a diagram showing another arrangement mode of the projector.

FIG. 13 is a diagram showing a third embodiment of the image presentation device according to the present invention, and is a diagram showing another form of the source image projection means.

FIG. 14 is a diagram showing a fourth embodiment of an image presenting apparatus according to the present invention.

FIG. 15 is a diagram showing a fifth embodiment of the present invention, and is a diagram showing a configuration of an imaging device suitable for use with the image presenting device according to the present invention.

FIG. 16 is a diagram showing a conventional image presenting apparatus.

FIG. 17 is a diagram showing a conventional image presenting device.

FIG. 18 is a diagram showing a conventional image presenting apparatus.

FIG. 19 is a diagram showing a conventional image presenting device.

[Explanation of symbols]

10 Source image projection means 20 Cylindrical lens 30 cylindrical concave mirror

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Claims (4)

(57) [Claims] 1. A source image projection means for projecting a plurality of divided images and forming real images corresponding to the respective divided images at different positions in the optical path direction in a positional relationship such that they overlap each other when viewed from the optical path direction. Then, the divided image is to represent the presentation object present in each of a plurality of regions formed by partitioning the space in which the presentation object exists along the depth direction, source image projection means, A cylindrical concave mirror that reflects the image light of each of the divided images and guides the image light to an observer, and between the source image projection means and the cylindrical concave mirror.
And a cylindrical lens arranged on the optical path, the cylindrical lens dividing the divided image in a first direction.
The cylindrical concave mirror magnifies the divided image into the first
Arranged to expand in a second direction which is orthogonal to the direction
An image display device characterized by being present . 2. The divided image displays only a part of the presented object which can be confirmed when the presented object is viewed from the front side in the depth direction. The image presenting apparatus according to item 1. 3. The divided image corresponding to the area on the far side in the depth direction does not include image information of the divided image corresponding to the area on the relatively front side. The image presenting apparatus according to claim 1. 4. The source image projection means comprises a plurality of projectors, and two or more divided images of the plurality of divided images are simultaneously projected by different projectors. 4. The video presenting device according to any one of 3 to 3.