JP4866121B2 - Element image group imaging device and stereoscopic image display device - Google Patents

Description

  The present invention relates to a technique for capturing an element image group for displaying a 3D image or displaying a 3D image, and more particularly to an integral photography element image group imaging apparatus and a 3D image display apparatus.

  In recent years, a so-called integral photography (IP) system using lens groups arranged in a planar or spherical shape has been developed as one of stereoscopic television systems that can be observed from an arbitrary viewpoint. Yes. A technique for capturing a high-resolution moving image using this method is disclosed (see Patent Document 1).

  Hereinafter, the principle of the IP method will be described with reference to FIG. FIG. 19 is an explanatory diagram for explaining a conventional IP system, (a) is a schematic diagram schematically showing a configuration of an apparatus for photographing an element image group by the conventional IP system, and (b) is a conventional diagram. It is a schematic diagram which shows typically the structure of the apparatus which displays a three-dimensional image by IP system.

  As shown in FIG. 19A, the imaging apparatus 100 includes a lens group 101 including a plurality of convex lenses l, l,... Arranged in an array on the same plane, and the lens group 101 as viewed from the subject s side. The photographic film 102 is disposed behind the camera, and the subject s disposed in front of the lens group 101 is photographed. On the photographic film 102, images i, i,... Of the subject s are formed by the respective convex lenses 1, 1,. Each image i, i,... Of the subject s photographed here is called an element image.

  Next, as shown in FIG. 19B, the display device 110 includes a lens group 111 (convex lenses l ′, l ′,...) That is the same as the lens group 101 of the imaging device 100 [FIG. When the image taken by the imaging device 100 is displayed on the display unit 112, the display unit 112 is configured from a display unit 112 installed behind the group 111 at the same position as the photographic film 102. A stereoscopic reproduction image s ′ of the subject s can be observed.

  Next, with reference to FIG. 20 (refer to FIG. 19 as appropriate), a method of capturing an element image group of a high-resolution moving image stereoscopic image by the IP method will be described. FIG. 20 is a schematic diagram schematically illustrating a conventional IP imaging device for capturing element image groups with high resolution, and FIG. 20A is a schematic diagram schematically illustrating a conventional IP imaging device. FIG. 4B is a schematic diagram schematically showing a cross section of the imaging apparatus shown in FIG. Here, an example is shown in which four element imaging elements d and convex lenses 1 are arranged vertically and five elements are arranged horizontally, but in actuality, 1,000 to 2,000 or more element imaging elements d and convex lenses l are arranged. Is done. And in this imaging method, since it images using a some element image sensor, an element image group can be imaged with a high resolution compared with the method of imaging all the element images only with one image sensor.

As shown in FIG. 20A, the image pickup apparatus 100A includes an image pickup element group 104A in which a large number of element image pickup elements d are arranged on one wafer 103A instead of the photographic film 102 of the image pickup apparatus 100 shown in FIG. [See FIG. 20 (b)] and a lens group 105A [see FIG. 20 (b)] composed of a plurality of convex lenses 1 installed in front of each element image sensor d. Around this element image sensor d, it is necessary to arrange a drive signal line for supplying a drive signal for driving the element image sensor d and an output signal line for outputting a signal from the element image sensor d. Yes, it is not possible to arrange the element image sensors d in close contact with each other without any gaps. Therefore, there is a gap between the adjacent convex lenses 1, and as shown in FIG. 20B, the optical shielding plate 106 A is arranged so that the light from the adjacent convex lens 1 does not enter the element imaging element d. Yes. If the element imaging element d is configured with a sufficiently high number of pixels, it is possible to capture an element image group for displaying a stereoscopic video with a high-resolution moving image. Then, the element image group obtained by the imaging device 100A is displayed on the display unit (not shown) on the back surface of the same lens group (not shown) as the lens group 105A of the imaging device 100A. When the display unit is viewed from the front through the lens group, the observer can observe the stereoscopic reproduction image.
JP 2001-320735 A (paragraph numbers 0014 to 0024)

  However, when an element image group is imaged by an image sensor group in which a plurality of element image sensors are arranged, information on an image incident on a gap portion of the element image sensor cannot be obtained. Therefore, even if the element image group captured here is displayed on the IP display device, a stereoscopic image cannot be obtained from the gap.

  The present invention has been made to solve the above-described problems of the prior art. Element images generated by the respective lenses of the lens group are displayed even when the image sensor or the display element are arranged with a gap. It is an object of the present invention to provide an element image group imaging device and a stereoscopic image display device that can capture an image without lacking and can reproduce a stereoscopic image by using all information of the acquired elemental image.

In order to solve the above problem, the element image group imaging apparatus according to claim 1 is configured of a plurality of element images, and element image group imaging that images an element image group that is an image for displaying a stereoscopic image of a subject. An element image lens group comprising a plurality of element image optical systems that form an image of the subject to generate the element image on the same plane orthogonal to the optical axis of the element image optical system. And a first condensing optical system for condensing light from the corresponding element image optical system, and an optical axis of the first condensing optical system. An afocal optical system configured by a second condensing optical system that collects light from the first condensing optical system with the same aperture as the first condensing optical system, Arranged in plural on the same plane orthogonal to the optical axis of the afocal optical system And the focal optical lens group, the element image lens group and are arranged on the same plane perpendicular to the optical axis of the afocal optical lens group, corresponding to each of the element image optical system and the afocal optical system, the corresponding A plurality of image pickup means for picking up the element image formed by the element image optical system and the afocal optical system, and a focal length of the first light collection optical system is the second light collection. The focal length of the optical system is larger.

  According to such a configuration, the element image group imaging device generates an element image by each element image optical system of the element image lens group, and makes the element image point-symmetric by each afocal optical system of the afocal optical lens group. Invert. At this time, since the focal length of the first condensing optical system constituting the afocal optical system is larger than the focal length of the second condensing optical system, the lateral magnification of the element image generated by the afocal optical system is reduced. Is done. Then, each element image is picked up by the image pickup means. Thereby, it is possible to generate and capture an element image in which the lateral magnification is reduced in accordance with the focal length between the first and second focusing optical systems.

  The element image group imaging device according to claim 2 is the element image group imaging device according to claim 1, wherein the element image group imaging device is installed between the afocal optical lens group and the element image lens group, and the element image A direction adjusting lens system is provided that converts light that is emitted from a certain point on the subject side of the optical system and passes through the principal point of the elemental image optical system into parallel light.

  According to such a configuration, the element image group imaging device is emitted from the object side focal point of the direction adjustment lens system by the direction adjustment lens system, and passes through the principal point of each element image optical system of the element image lens group. Converts light into parallel light. Thus, the element image group imaging apparatus can capture the element image of the subject centered on the same point in the real space by all the image imaging means.

The element image group imaging device according to claim 3 is an element image group imaging device configured to image an element image group, which is an image for displaying a stereoscopic image of a subject, which includes a plurality of element images. An element image lens group in which a plurality of element image optical systems that form an image of the subject to generate the element image are arranged on the same plane orthogonal to the optical axis of the element image optical system, and the element image Either the light that has passed through the optical axis of the optical system and transmitted through the elemental image optical system, or the light that passes through the principal point of the elemental image optical system from a certain point on the subject side of the elemental image optical system converges to one point And the element image group formed by the element image lens group at a different position. The element image group has a principal point at a point where light is converged by the first direction adjustment lens system. Imaging optical system for forming an image and the first one Corresponding to the second direction adjusting lens system that converts the light converged by the adjusting lens system and passed through the principal point of the imaging optical system into parallel light, and one or a plurality of the element image optical systems, and the correspondence A first condensing optical system that condenses light that has passed through the elemental image optical system and entered from the second direction adjusting lens system, and is disposed on the optical axis of the first condensing optical system An afocal optical system comprising a second condensing optical system that condenses the light from the first condensing optical system with the same aperture as the first condensing optical system. A plurality of afocal optical lens groups arranged on the same plane orthogonal to the optical axis of the focal optical system, and arranged on the same plane orthogonal to the optical axes of the element image lens group and the afocal optical lens group, Corresponding to each of the afocal optical systems A plurality of image pickup means for picking up images formed by the afocal optical system, and a focal length of the first condensing optical system is larger than a focal length of the second condensing optical system It was.

  According to such a configuration, the element image group imaging apparatus generates an element image by each element image optical system of the element image lens group, and separates the element image group generated by the element image lens group by the imaging optical system. The image is formed at the position of. Then, the light from the elemental image group imaged by this imaging optical system is incident on the afocal optical lens group, and the elemental image group imaging apparatus is controlled by the afocal optical system of each afocal optical lens group. An image composed of one or a plurality of element images reduced in magnification is generated. Furthermore, the elemental image group imaging device captures each image by an image capturing unit. Thereby, the elemental image group imaging apparatus can generate and capture an elemental image with the lateral magnification reduced in accordance with the focal length between the first condensing optical system and the second condensing optical system.

  Furthermore, the elemental image group imaging device according to claim 4 has an afocal function between the afocal optical system and the image imaging unit in the elemental image group imaging device according to claim 3, A plurality of image conversion optical systems for converting the element image incident from the afocal optical system into point symmetry with respect to the center of the element image are provided.

  According to such a configuration, the elemental image group imaging device converts the elemental image incident from the afocal optical system into point symmetry with respect to the center of the elemental image by the image conversion optical system. Accordingly, one or a plurality of element images generated by the element image optical system can be imaged by converting them into point symmetry with respect to the center of each element image.

The stereoscopic image display apparatus according to claim 5 is a stereoscopic image display configured to input an element image group which is an image for displaying a stereoscopic image of a subject and which includes the plurality of element images and displays the stereoscopic image. An image display means for displaying the element image; a second condensing optical system for collecting light from the image display means corresponding to each of the image display means; and A first condensing unit that is installed on the optical axis of the second condensing optical system and condenses light from the second condensing optical system with the same aperture as the second condensing optical system. An afocal optical lens group in which a plurality of afocal optical systems composed of an optical system are arranged on the same plane orthogonal to the optical axis of the afocal optical system; the image display means; and the afocal optical system. Corresponding to each, the corresponding afocal optical system And emits al light, an element image optical system for reproducing a stereoscopic image of the object, and an element image lens group in which a plurality arranged on the same plane orthogonal to the optical axis of the element image optical system, The image display means is arranged on the same plane orthogonal to the optical axes of the element image lens group and the afocal optical lens group, and the focal length of the first condensing optical system is the second condensing optical system. The focal length of the system is larger.

  According to such a configuration, the stereoscopic image display device enlarges the lateral magnification of the element image displayed on the image display unit by the afocal optical system, and the object indicated by the element image group enlarged by the element image lens group. Reproduce the 3D image. As a result, the stereoscopic image display device can reproduce the stereoscopic image by enlarging the lateral magnification of each element image in accordance with the focal length of the first condensing optical system and the second condensing optical system. .

  Furthermore, the stereoscopic image display device according to claim 6 is the stereoscopic image display device according to claim 5, which is disposed between the afocal optical lens group and the elemental image lens group, and the afocal optical system. A direction adjusting lens system for converging the light transmitted through the afocal optical system through one optical axis to one point.

  According to such a configuration, the stereoscopic image display device collects the parallel light emitted from the afocal optical lens group by the direction adjustment lens system and converges it on the focal position of the direction adjustment lens system. Then, by displaying the element image group in which the subject is imaged around the focus position in the real space on the image display means of the stereoscopic image display device and reproducing the stereoscopic image, the stereoscopic image can be displayed in a wide viewing area. Can be displayed.

The stereoscopic image display apparatus according to claim 7 is a stereoscopic image display configured to display a stereoscopic image by inputting an elemental image group which is an image for displaying a stereoscopic image of a subject, which includes a plurality of elemental images. A plurality of image display means for displaying an image composed of one or a plurality of the element images, and corresponding to each of the image display means, and condensing light from the corresponding image display means The second condensing optical system is installed on the optical axis of the second condensing optical system, and has the same aperture as the second condensing optical system, and is from the second condensing optical system. An afocal optical lens group in which a plurality of afocal optical systems composed of a first condensing optical system for condensing light are arranged on the same plane orthogonal to the optical axis of the afocal optical system; The afocal optics through the optical axis of the afocal optical system A second direction adjusting lens system for converging the light transmitted through the light beam into one point, and a principal point at the point where the light is converged by the second direction adjusting lens system, and imaged by the afocal optical lens group An imaging optical system that forms an image of the element image group at a different position and light that has been converged by the second direction adjustment lens system and passed through the principal point of the imaging optical system is converted into parallel light, or Corresponding to each of the first direction adjustment lens system that converges at a certain point and each of the element images formed by the imaging optical system, the light from the corresponding element image is emitted, and A plurality of elemental image optical systems for reproducing a stereoscopic image on the same plane orthogonal to the optical axis of the elemental image optical system, and the image display means includes the elemental image lens group. And the afocal optical lens Are arranged on the same plane perpendicular to the optical axis of the focal length of said first focusing optical system was greater than the focal length of the second focusing optical system.

  According to such a configuration, the stereoscopic image display device forms one or a plurality of element images whose lateral magnification is enlarged by each afocal optical system of the afocal optical lens group, and the imaging optical system The elemental image group formed by the afocal optical lens group is formed at another position. Then, the light from the elemental image group imaged by the imaging optical system is incident on the elemental image lens group, and the stereoscopic image display device is enlarged by each elemental image optical system of the elemental image lens group. A stereoscopic image of the subject indicated by the image group is reproduced. Thereby, the lateral magnification of each element image can be enlarged according to the focal lengths of the first condensing optical system and the second condensing optical system, and a stereoscopic image can be reproduced.

  Further, the stereoscopic image display device according to claim 8 is the stereoscopic image display device according to claim 7, wherein the stereoscopic image display device has an afocal function between the afocal optical system and the image display means, and the image A plurality of image conversion optical systems for converting the element image incident from the display means into point symmetry with respect to the center of the element image are provided.

  According to such a configuration, the stereoscopic image display device converts the element image incident from the image display means into point symmetry with respect to the center of the element image by the image conversion optical system. As a result, a three-dimensional image represented by the element image converted into point symmetry can be reproduced.

  The elemental image group imaging apparatus and stereoscopic image display apparatus according to the present invention have the following excellent effects. According to the first aspect of the present invention, even if there is a gap between the plurality of image capturing units, the element image captured by the image capturing unit has a reduced horizontal magnification, so that the element image is not lost. An image can be taken.

  According to the second aspect of the present invention, by capturing an element image centered on the focal position of the direction adjusting lens system, the range of the subject in the real space that is formed as each element image is widened. can do. Therefore, when displaying a stereoscopic image by displaying it on an IP display device, it is possible to capture an element image group having a wide viewing zone, which is a range of eye positions where an observer can correctly observe the stereoscopic image.

  According to the third aspect of the present invention, even if there is a gap between the plurality of image capturing units, the element image captured by the image capturing unit has a reduced horizontal magnification, and thus the element image is not lost. In addition to being able to image, one or a plurality of elemental image optical systems can correspond to a single image imaging unit, and one or a plurality of elemental images can be captured by each image imaging unit.

  According to the fourth aspect of the present invention, it is possible to capture a group of element images that can reproduce a stereoscopic image having the same unevenness in the depth direction as the subject when the stereoscopic image is displayed on the IP display device and reproduced. .

  According to the fifth aspect of the present invention, even if there is a gap between the image display means, the element image displayed by the image display means is expanded with the horizontal magnification and emitted without a gap. An element image with a reduced lateral magnification can be generated and captured in accordance with the focal length between the first and second focusing optical systems.

  According to the sixth aspect of the present invention, the viewing zone is widened by intersecting the light from the center of all element images passing through the principal point of the element image optical system at the focal position of the direction adjusting lens system. 3D image can be reproduced.

  According to the seventh aspect of the present invention, even if there are gaps between the plurality of image display means, the element image formed on the second direction adjusting lens system by each afocal optical system is the lateral magnification. Therefore, the light from the element image is emitted without a gap, and one or a plurality of element image optical systems are associated with one image display means, and one or a plurality of element image optical systems are associated with each image display means. A stereoscopic image can be reproduced by displaying the element image.

  According to the eighth aspect of the present invention, it is possible to reproduce a stereoscopic image having the same unevenness in the depth direction as the subject.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Configuration of Imaging Device (First Embodiment)]
First, with reference to FIG. 1, the structure of the imaging device 1 which is 1st Embodiment of this invention is demonstrated. FIG. 1 is a schematic diagram schematically showing the configuration of the imaging apparatus according to the first embodiment of the present invention. Here, the optical path of light incident as parallel light on the afocal optical lens group 13 is schematically illustrated.

  The imaging device (element image group imaging device) 1 captures an element image group of the subject S. The imaging apparatus 1 includes an elemental image lens group 11, a light shielding unit 12, an afocal optical lens group 13, and an imaging element group 14.

  The element image lens group 11 generates an element image group of the subject S. This element image lens group 11 is composed of a plurality of convex lenses L1, L1,... Arranged in an array on the same plane orthogonal to the optical axis. Here, the element image lens group 11 is composed of a plurality of convex lenses L1 arranged in an array, but it is composed of, for example, a plurality of gradient index lenses arranged in an array. Alternatively, a lens system in which a plurality of lenses are arranged in the optical axis direction may be arranged in an array in a direction orthogonal to the optical axis.

The convex lens (element image optical system) L1 forms an image of the subject S by receiving light from the subject S and generates an element image. The light emitted from the convex lens L1 enters the convex lens L2. The lens L1 is, in the optical axis direction from the lens L2 to be described later, is installed in a position away sum of the focal length f _L2 of the focal length f _L1 and lens L2 convex lens L1.

The light shielding means 12 has an opening H on the optical axis of the afocal optical system 131 of the afocal optical lens group 13 to be described later, and passes through the opening H of the light emitted from the convex lens L2 of the afocal optical system 131. It shields light other than light. The light shielding means 12 between the lens L2 and the convex lens L3 of the afocal optical system 131 is installed from the lens L2 at a position apart by the focal length _{f L2} of the convex lens L2.

  The afocal optical lens group 13 receives light from the element image lens group 11 and reduces the lateral magnification of each element image of the element image group generated by the element image lens group 11. The afocal optical lens group 13 includes a plurality of afocal optical systems 131 arranged in an array on the same plane orthogonal to the optical axes of the convex lenses L1, L1,.

  The afocal optical system 131 corresponds to each convex lens L1 of the element image lens group 11, and reduces the lateral magnification of the element image generated by the corresponding convex lens L1. Here, the afocal optical system 131 is composed of a convex lens L2 and a convex lens L3. Here, it is assumed that the optical axes of the corresponding convex lenses L1, L2, and L3 coincide with each other and have the same diameter.

The convex lens (first condensing optical system) L2 receives light from the corresponding convex lens L1 and condenses this light. The convex lens (second condensing optical system) L3 is configured to collect light that is incident from the light that has exited from the corresponding convex lens L2 and passed through the opening H of the light shielding unit 12. Here, the distance in the optical axis direction of the lens L2 and the convex lens L3 is equal to the sum of the focal length _{f L2} and a convex lens L3 and the focal length _{f L3} of the convex lens L2. Therefore, parallel light incident on the convex lens L2 is incident on the convex lens L3 convex lens L2 on the optical axis after converged at a position apart by the focal length f _L2, is emitted as parallel light again.

Further, here, the light shielding means 12 is provided between the convex lens L2 and the convex lens L3, and the light shielding means 12 is provided with an opening H on the optical axis of the convex lenses L2 and L3. The convex lens L3 is in the optical axis direction from a light shielding means 12 is disposed at a position away by the focal length f _L2 of the convex lens L2. Thereby, only the parallel light incident on the convex lens L2 passes through the aperture H and is converted into parallel light by the convex lens L3. Here, the parallel light emitted from the convex lens L3 enters the image sensor D1. Thus, by installing the light shielding means 12 having the openings H, H,..., The light shielding means 12 shields light emitted from the convex lens L2 toward the convex lens L3 other than the convex lens L3 corresponding to the convex lens L2. be able to. The light shielding means 12 may not be installed.

Further, the focal length _{f L2} of the convex lens L2 is larger than the focal length _{f L3} of the convex lens L3. Therefore, the parallel light incident on the convex lens L is converted into parallel light having a diameter smaller than the aperture of the parallel light, and is emitted from the convex lens L3. Thereby, the afocal optical system 131 can reduce the lateral magnification of the element image generated by the convex lens L1.

  The image pickup element group 14 is an element that is generated by the element image lens group 11 and picks up an element image group whose lateral magnification is reduced for each element image by the afocal optical lens group 13. The image pickup element group 14 includes a plurality of image pickup elements D1 arranged on the optical axes of the convex lenses L1, L2, and L3 on the same plane orthogonal to the optical axes of the element image lens group 11 and the afocal optical lens group 13. Is done. Here, the image pickup device D1 of the image pickup device group 14 (the light receiving portion of the image pickup device D1) is arranged at a predetermined interval in order to install a drive signal line, an output signal line, and the like.

  The image pickup element (image pickup means) D1 corresponds to the convex lens L1 and the afocal optical system 131, and picks up an elemental image formed by the convex lens L1 and the afocal optical system 131. Here, the width of the image sensor D1 is smaller than the apertures of the convex lenses L1, L2, and L3, but the element image is captured by the afocal optical system 131 because the element image is reduced to be smaller than the apertures of the convex lenses L1, L2, and L3. The entire element image that has entered is picked up by the element D1 without being lost.

  1 shows a case where the imaging apparatus 1 includes three convex lenses L1, convex lenses L2, and three afocal optical systems 131, the number of convex lenses L1, convex lenses L2, and afocal optical systems 131 is the same. It is sufficient if there are four or more each. In addition, each of the convex lens L1, the convex lens L2, and the afocal optical system 131 may be arranged only in the horizontal direction, for example, or may be arranged two-dimensionally in the horizontal direction and the vertical direction.

[Operation of Imaging Device (First Embodiment)]
Next, with reference to FIG. 1, an operation in which the imaging apparatus 1 according to the present invention captures an element image group will be described.

  First, light from the subject S enters the plurality of convex lenses L1, L1,. Subsequently, the light emitted from the elemental image lens group 11 enters the convex lenses L2, L2,... Of the afocal optical lens group 13, and is emitted to the light shielding unit 12. Here, the parallel light passing through the convex lenses L1, L1,... And entering the convex lenses L2, L2,... Is collected by the convex lenses L2, L2,. ... Further, other light incident on the convex lenses L2, L2,...

  Further, the light incident on the convex lenses L3, L3,... Is converted into parallel light having a diameter smaller than the aperture of the convex lens L2 by the convex lenses L3, L3,. And the imaging device 1 images the light radiate | emitted from the convex lenses L3, L3, ... by each image sensor D1 of the image sensor group 14. FIG. As a result, element images with reduced lateral magnification are picked up by the respective image pickup devices D1.

[Configuration of Imaging Device (Second Embodiment)]
Next, with reference to FIG. 2, a configuration of an imaging apparatus 1A according to the second embodiment of the present invention will be described. FIG. 2 is a schematic diagram schematically showing the configuration of the imaging apparatus according to the second embodiment of the present invention. Here, the optical path of light incident as parallel light on the afocal optical lens group 13 is schematically illustrated. As illustrated in FIG. 2, the imaging device 1 </ b> A captures an elemental image group of the subject S.

  An imaging apparatus (element image group imaging apparatus) 1A is configured by adding a field lens group 15A to the imaging apparatus 1 (see FIG. 1). Since the configuration other than the field lens group 15A in the imaging apparatus 1A is the same as that shown in FIG. 1, the same reference numerals are given and the description thereof is omitted.

  The field lens group 15A is for converting light incident from the convex lens L1 through the center (principal point) of each convex lens L1 of the element image lens group 11 into parallel light. This field lens group 15A is composed of a plurality of field lenses L4A, L4A,... Arranged in an array on the same plane orthogonal to the optical axis.

  The field lens L4A corresponds to each convex lens L1 of the element image lens group 11, and converts light incident from the convex lens L1 through the principal point of the corresponding convex lens L1 into parallel light. Here, it is assumed that the optical axes of the field lens L4A and the corresponding convex lenses L1, L2, and L3 coincide with each other and have the same aperture. As described above, by providing the field lens group 15A between the element image lens group 11 and the afocal optical lens group 13, light from the element image lens group 11 can be efficiently transmitted to the afocal optical lens group 13. .

[Configuration of Imaging Device (Third Embodiment)]
Next, with reference to FIG. 3, the structure of the imaging device 1B which is 3rd embodiment of this invention is demonstrated. FIG. 3 is a schematic diagram schematically showing the configuration of the imaging apparatus according to the third embodiment of the present invention. Here, the optical path of light incident as parallel light on the afocal optical lens group 13 is schematically illustrated. As illustrated in FIG. 3, the imaging device 1 </ b> B captures an elemental image group of the subject S.

  An image pickup apparatus (element image group image pickup apparatus) 1B includes an element image lens group 11B instead of the element image lens group 11 of the image pickup apparatus 1 (see FIG. 1), and further includes a field lens group 15B and a shooting direction adjustment lens 16B. Added and configured. Since the configuration other than the element image lens group 11B, the field lens group 15B, and the photographing direction adjustment lens 16B in the imaging apparatus 1B is the same as that shown in FIG. 1, the same reference numerals are given and description thereof is omitted.

  The element image lens group 11B generates an element image group of the subject S. The element image lens group 11B includes a plurality of convex lenses L1B, L1B,... Arranged in an array on the same plane orthogonal to the optical axis.

  The convex lens (element image optical system) L1B is an element in which light from the subject S is incident to form an image of the subject S to generate an element image. The light emitted from the convex lens L1B enters the field lens L4B.

  The field lens group 15B transmits light that has passed through the elemental image lens group 11B to a photographing direction adjusting lens 16B described later. This field lens group 15B is composed of a plurality of field lenses L4B, L4B,... Arranged in an array on the same plane orthogonal to the optical axis.

  The field lens L4B corresponds to each convex lens L1B of the element image lens group 11B, and transmits light incident from the corresponding convex lens L1B to the photographing direction adjusting lens 16B described later. Here, the field lens L4B is installed so that the center of the corresponding field lens L4B comes on a straight line passing through the center of each convex lens L1B from the object side focal point (point O) of the photographing direction adjusting lens 16B described later. The diameter of the field lens L4B is proportional to the distance in the optical axis direction from the point O. Then, the light emitted from the corresponding field lens L4B through the principal point of each convex lens L1B of the element image lens group 11B becomes parallel light after passing through the photographing direction adjusting lens 16B. Thus, by providing the field lens group 15B between the element image lens group 11B and the photographing direction adjusting lens 16B, the light from the element image lens group 11B can be efficiently transmitted to the photographing direction adjusting lens 16B.

  The shooting direction adjustment lens (direction adjustment lens system) 16B adjusts the direction in which the element image generated by the element image lens group 11B is shot. Here, the photographing direction adjusting lens 16B makes the light passing through the object side focal point (point O) of the photographing direction adjusting lens 16B and the principal points of the convex lens L1B and the field lens L4B in parallel, and the element image lens group 11B. The direction in which the element image generated by the above is photographed can be the direction from the center of each convex lens L1 to the object side focal point (point O) of the photographing direction adjusting lens 16B. In this way, when the element image captured by the image capturing apparatus 1B is displayed on the IP display device and the stereoscopic image is reproduced, the range of the eye position where the observer can observe the stereoscopic image correctly. The viewing zone can be widened.

[Configuration of Imaging Device (Fourth Embodiment)]
Next, with reference to FIG. 4, a configuration of an imaging apparatus 1C according to the fourth embodiment of the present invention will be described. FIG. 4 is a schematic diagram schematically showing the configuration of the imaging apparatus according to the fourth embodiment of the present invention. Here, the optical path of light incident on the convex lens L1C of the element image lens group 11C through the optical axis of the convex lens L1C of the element image lens group 11C is schematically illustrated. As illustrated in FIG. 4, the imaging device 1 </ b> C captures an elemental image group of the subject S.

  An image pickup apparatus (element image group image pickup apparatus) 1C includes an element image lens group 11C instead of the element image lens group 11 of the image pickup apparatus 1 (see FIG. 1), and further includes a first shooting direction adjustment lens 17C and an image forming unit. A lens 18C and a second photographing direction adjusting lens 19C are added. Since the configuration other than the element image lens group 11C, the first imaging direction adjustment lens 17C, the imaging lens 18C, and the second imaging direction adjustment lens 19C in the imaging apparatus 1C is the same as that shown in FIG. Reference numerals are assigned and description is omitted.

  The element image lens group 11C generates an element image group of the subject S. The element image lens group 11C is composed of a plurality of convex lenses L1C, L1C,... Arranged in an array on the same plane orthogonal to the optical axis.

  The convex lens (element image optical system) L1C is an element in which light from the subject S is incident to form an image of the subject S to generate an element image. The light emitted from the convex lens L1C enters the first photographing direction adjustment lens 17C. Here, each convex lens L1C forms an element image on the first photographing direction adjusting lens 17C.

The first shooting direction adjustment lens (first direction adjustment lens system) 17C adjusts the direction in which the element image generated by the element image lens group 11C is shot. Here, an imaging lens 18C, which will be described later, is installed at a position away from the first shooting direction adjustment lens 17C by the focal length f _{17C of} the first shooting direction adjustment lens 17C, and the first shooting direction adjustment lens 17C The light parallel to the optical axis of the first photographing direction adjusting lens 17C is condensed on the principal point of the imaging lens 18C. Thereby, the first imaging direction adjusting lens 17C can set the direction in which the element image is captured by each convex lens L1C of the element image lens group 11C to the optical axis direction.

  The imaging lens (imaging optical system) 18C forms an element image formed on the first imaging direction adjustment lens 17C by the convex lenses L1C of the element image lens group 11C on the second imaging direction adjustment lens 19C. Is. Then, with respect to the imaging lens 18C, the imaging lens so that the position where the first imaging direction adjustment lens 17C is installed and the position where the second imaging direction adjustment lens 19C is installed are in a conjugate relationship. A focal length of 18C is set.

The second shooting direction adjustment lens (second direction adjustment lens system) 19C is installed at a position away from the imaging lens 18C in the optical axis direction by the focal length f _{19C of} the second shooting direction adjustment lens 19C, and is a convex lens L1C. And the light passing through the principal point of the imaging lens 18C are made parallel light.

  By installing the first shooting direction adjustment lens 17C, the imaging lens 18C, and the second shooting direction adjustment lens 19C in this way, the element image group formed on the first shooting direction adjustment lens 17C by the element image lens group 11C. Is formed on the second imaging direction adjusting lens 19C by the imaging lens 18C, and further, the lateral magnification is reduced by each afocal optical system 131, and is formed on the corresponding image sensor D1.

  At this time, one convex lens L1C and an element image may correspond to one afocal optical system 131 and the image sensor D1, or a plurality of convex lenses L1C, L1C,. It is good to do. Thus, for example, even if the element image lens group 11C includes millions of convex lenses L1C, the imaging device 1C can capture an arbitrary number of images by associating a plurality of convex lenses L1C with one imaging element D1. Millions of element images can be picked up by the image pickup element group 14 composed of the element D1.

  4 shows a case where the imaging apparatus 1C includes three afocal optical systems 131, but may include four or more afocal optical systems 131. In addition, each of the convex lens L1, the convex lens L2, and the afocal optical system 131 may be arranged in the horizontal direction, or may be arranged in two dimensions in the horizontal direction and the vertical direction.

[Configuration of Imaging Apparatus (Fifth Embodiment)]
Next, with reference to FIG. 5, a configuration of an imaging apparatus 1D according to the fifth embodiment of the present invention will be described. FIG. 5 is a schematic diagram schematically showing the configuration of an imaging apparatus according to the fifth embodiment of the present invention. Here, the optical path of light that passes through the principal point of the convex lens L1C of the element image lens group 11C and enters the convex lens L1C of the element image lens group 11C from the point O is schematically illustrated. As illustrated in FIG. 5, the imaging device 1 </ b> D captures an elemental image group of the subject S.

  The imaging device (element image group imaging device) 1D includes a first imaging direction adjustment lens 17D instead of the first imaging direction adjustment lens 17C of the imaging device 1C (see FIG. 4). Since the configuration other than the first imaging direction adjustment lens 17D in the imaging apparatus 1D is the same as that shown in FIG. 4, the same reference numerals are given and the description thereof is omitted.

  The first shooting direction adjustment lens (first direction adjustment lens system) 17D adjusts the direction in which the element image generated by the element image lens group 11C is shot. Here, with respect to the first photographing direction adjustment lens 17D, the first photographing is performed so that the point O on the subject S side as viewed from the element image lens group 11C and the principal point of the imaging lens 18C have a conjugate relationship. The direction adjustment lens 17D and the imaging lens 18C are set apart from each other by a distance larger than the focal length of the first photographing direction adjustment lens 17D. As a result, the first photographing direction adjusting lens 17D can change the direction of photographing the element image generated by the element image lens group 11C from the center of each convex lens L1C to the point O. By doing so, it is possible to widen the viewing zone when reproducing the stereoscopic image by displaying the element image captured by the imaging device 1D on the IP display device.

[Configuration of Imaging Device (Sixth Embodiment)]
Next, with reference to FIG. 6, the structure of the imaging device 1E which is the 6th embodiment of this invention is demonstrated. FIG. 6 is a schematic diagram schematically showing the configuration of an imaging apparatus according to the sixth embodiment of the present invention. Here, the optical path of light incident on the concave lens L1E of the element image lens group 11E through the optical axis of the concave lens L1E of the element image lens group 11E is schematically illustrated. Furthermore, the optical path of light from a point with a virtual image formed on the image-side focal plane G is schematically shown by a thick line. As illustrated in FIG. 6, the imaging device 1 </ b> E captures an elemental image group of the subject S.

  The imaging device (element image group imaging device) 1E includes an element image lens group 11E instead of the element image lens group 11C of the imaging device 1C (see FIG. 4), and an imaging lens 18E instead of the imaging lens 18C. Since the configuration other than the element image lens group 11E and the imaging lens 18E in the imaging device 1E is the same as that shown in FIG. 4, the same reference numerals are given and the description thereof is omitted.

  The element image lens group 11E generates an element image group of the subject S. This element image lens group 11E is composed of a plurality of concave lenses L1E, L1E,... Arranged in an array on the same plane orthogonal to the optical axis.

  The concave lens (element image optical system) L1E is an element in which light from the subject S is incident to form an image (virtual image) of the subject S to generate an element image. The light emitted from the concave lens L1E enters the first photographing direction adjusting lens 17C. Here, the concave lens L1E has a negative focal length, and forms a virtual image of the element image on the image-side focal plane G.

  The imaging lens (imaging optical system) 18E forms an element image formed by each concave lens L1E of the element image lens group 11E at another position. Then, the focal length of the imaging lens 18E is set so that the image-side focal plane G and the position where the second imaging direction adjustment lens 19C is installed have a conjugate relationship with respect to the imaging lens 18E. .

  By installing the imaging lens 18E in this manner, a virtual image of the element image group formed on the image-side focal plane G by the element image lens group 11E is placed on the second photographing direction adjustment lens 19C by the imaging lens 18E. Further, the lateral magnification is reduced by each of the afocal optical systems 131 and formed on the corresponding image sensor D1.

[Configuration of Imaging Device (Seventh Embodiment)]
Next, with reference to FIG. 7, the structure of the imaging device 1F which is the 7th Embodiment of this invention is demonstrated. FIG. 7 is a schematic diagram schematically showing the configuration of the imaging apparatus according to the seventh embodiment of the present invention. Here, an optical path of light that passes through the principal point of the concave lens L1E of the element image lens group 11E and enters the concave lens L1E of the element image lens group 11E from the point O is schematically illustrated. As illustrated in FIG. 7, the imaging device 1 </ b> F captures an elemental image group of the subject S.

  The imaging device (element image group imaging device) 1F includes a first imaging direction adjustment lens 17F instead of the first imaging direction adjustment lens 17C of the imaging device 1E (see FIG. 6). Since the configuration other than the first shooting direction adjusting lens 17F in the imaging apparatus 1F is the same as that shown in FIG. 6, the same reference numerals are given and the description thereof is omitted.

  The first shooting direction adjustment lens (first direction adjustment lens system) 17F adjusts the direction in which the element image generated by the element image lens group 11E is shot. Here, with respect to the first photographing direction adjusting lens 17F, the first photographing is performed so that the point O on the subject S side as viewed from the element image lens group 11E and the principal point of the imaging lens 18E have a conjugate relationship. The direction adjustment lens 17F and the imaging lens 18E are set apart from each other by a distance larger than the focal length of the first photographing direction adjustment lens 17F. Accordingly, the first photographing direction adjusting lens 17F can change the direction of photographing the element image generated by the element image lens group 11E from the center of each concave lens L1E to the point O. By doing so, it is possible to widen the viewing zone when reproducing the stereoscopic image by displaying the element image captured by the imaging device 1F on the IP display device.

[Configuration of Imaging Device (Eighth Embodiment)]
Next, with reference to FIG. 8, the structure of the imaging device 1G which is the 8th Embodiment of this invention is demonstrated. FIG. 8 is a schematic diagram schematically showing the configuration of the image pickup apparatus according to the eighth embodiment of the present invention. Here, an optical path of light that enters the convex lens L1G of the element image lens group 11G through the optical axis of the convex lens L1G of the element image lens group 11G is schematically illustrated. As illustrated in FIG. 8, the imaging device 1G captures an elemental image group of the subject S.

  An imaging apparatus (element image group imaging apparatus) 1G includes an element image lens group 11G instead of the element image lens group 11C of the imaging apparatus 1C (see FIG. 4), and an imaging lens 18G instead of the imaging lens 18C. Further, a field lens group 15G is added. Since the configuration other than the element image lens group 11G, the field lens group 15G, and the imaging lens 18G in the image pickup apparatus 1G is the same as that shown in FIG. 4, the same reference numerals are given and the description thereof is omitted.

  The element image lens group 11G generates an element image group of the subject S. This element image lens group 11G is composed of a plurality of convex lenses L1G, L1G,... Arranged in an array on the same plane orthogonal to the optical axis.

  The convex lens (element image optical system) L1G forms an image of the subject S by receiving light from the subject S and generates an element image. The light emitted from the convex lens L1G enters the corresponding field lens L4G. Here, each convex lens L1G forms an element image on the corresponding field lens L4G.

  The field lens group 15G transmits light incident from the element image lens group 11G to the first photographing direction adjustment lens 17C. The field lens group 15G includes a plurality of field lenses L4G, L4G,... Arranged in an array on the same plane orthogonal to the optical axis.

  The field lens L4G corresponds to each convex lens L1G of the element image lens group 11G, and transmits light incident from the corresponding convex lens L1G to the first photographing direction adjusting lens 17C. Thus, by providing the field lens group 15G between the element image lens group 11G and the first imaging direction adjustment lens 17C, light from the element image lens group 11G can be efficiently transmitted to the first imaging direction adjustment lens 17C. Can do.

  The imaging lens (imaging optical system) 18G forms an element image formed by each convex lens L1G of the element image lens group 11G at another position. Then, with respect to the imaging lens 18G, the focal point of the imaging lens 18C is such that the position where the field lens group 15G is installed and the position where the second imaging direction adjustment lens 19C is installed are in a conjugate relationship. Set the distance.

  By designing the imaging lens 18G in this way, the element image formed on the corresponding field lens L4G by the convex lens L1G of each element image lens group 11G is converted into the second photographing direction adjusting lens 19C by the imaging lens 18G. Further, the lateral magnification is reduced by each afocal optical system 131 and formed on the corresponding image sensor D1.

[Configuration of Imaging Apparatus (Ninth Embodiment)]
Next, with reference to FIG. 9, the structure of the imaging device 1H which is the 9th embodiment of this invention is demonstrated. FIG. 9 is a schematic diagram schematically showing the configuration of the imaging apparatus according to the ninth embodiment of the present invention. Here, the optical path of light that passes through the principal point of the convex lens L1H of the element image lens group 11H and enters the convex lens L1H of the element image lens group 11H from the point O is schematically illustrated. Furthermore, the optical path of light that enters the principal point of the convex lens L1H at both ends of the element image lens group 11H and passes through the outer edge portion of the field lens L4H of the field lens group 15H is schematically illustrated. As illustrated in FIG. 9, the imaging device 1H captures an elemental image group of the subject S.

  An image pickup apparatus (element image group image pickup apparatus) 1H includes an element image lens group 11H instead of the element image lens group 11G of the image pickup apparatus 1G (see FIG. 8), a field lens group 15H instead of the field lens group 15G, A first shooting direction adjustment lens 17H is provided instead of the first shooting direction adjustment lens 17C. Since the configuration other than the element image lens group 11H, the field lens group 15H, and the first imaging direction adjustment lens 17H in the imaging apparatus 1H is the same as that shown in FIG. 8, the same reference numerals are given and the description is omitted. To do.

  The element image lens group 11H generates an element image group of the subject S. This element image lens group 11H is composed of a plurality of convex lenses L1H, L1H,... Arranged in an array on the same plane orthogonal to the optical axis.

  The convex lens (element image optical system) L1H is an element in which light from the subject S is incident to form an image of the subject S to generate an element image. The light emitted from the convex lens L1H enters the field lens L4H.

  The field lens group 15H transmits light incident from the element image lens group 11H to the first photographing direction adjustment lens 17H. This field lens group 15H is composed of a plurality of field lenses L4H, L4H,... Arranged in an array on the same plane orthogonal to the optical axis.

  The field lens L4H corresponds to each convex lens L1H of the element image lens group 11H, and transmits light incident from the corresponding convex lens L1H to the first photographing direction adjusting lens 17H. Here, the center of the corresponding field lens L4H is placed on a straight line passing through the center of each convex lens L1H from the point O on the subject S side, and the apertures of the convex lens L1H and the field lens L4H are point O Is proportional to the distance in the optical axis direction. Then, an optical path of light emitted from the field lens L4H, passing through the principal point of the convex lens L1H and passing through the outer edge portion of the field lens L4H, is an extension of a straight line (indicated by a dotted line in FIG. 9) passing from the point O to the outer edge portion The convex lens L1H and the field lens L4H are arranged so as to coincide with the line. Then, the light emitted from the field lens L4H through the principal point of each convex lens L1H of the element image lens group 11H converges on the principal point of the imaging lens 18G, and then passes through the second photographing direction adjusting lens 19C to be parallel. It becomes light. Thus, by providing the field lens group 15H between the element image lens group 11H and the first shooting direction adjustment lens 17H, light from the element image lens group 11H can be efficiently transmitted to the first shooting direction adjustment lens 17H. Can do.

  The first shooting direction adjustment lens (first direction adjustment lens system) 17H adjusts the direction in which the element image generated by the element image lens group 11H is shot. Here, with respect to the first photographing direction adjusting lens 17H, the first photographing is performed so that the point O on the subject S side as viewed from the element image lens group 11H and the principal point of the imaging lens 18G have a conjugate relationship. The direction adjustment lens 17H and the imaging lens 18G are set apart from each other by a distance larger than the focal length of the first photographing direction adjustment lens 17H. As a result, the first imaging direction adjustment lens 17H can set the direction in which the element image generated by the element image lens group 11H is imaged from the center of each convex lens L1H to the point O. By doing so, it is possible to widen the viewing zone when reproducing the stereoscopic image by displaying the element image captured by the imaging device 1H on the IP display device.

[Configuration of Imaging Apparatus (Tenth Embodiment)]
Next, with reference to FIG. 10, the configuration of an imaging apparatus 1I according to the tenth embodiment of the present invention will be described. FIG. 10 is a schematic diagram schematically showing the configuration of the imaging apparatus according to the tenth embodiment of the present invention. Here, the optical path of light incident on the concave lens L1I of the element image lens group 11I through the optical axis of the concave lens L1I of the element image lens group 11I is schematically illustrated. As illustrated in FIG. 10, the imaging device 1 </ b> I captures an elemental image group of the subject S.

  The imaging device (element image group imaging device) 1I includes an element image lens group 11I instead of the element image lens group 11G of the imaging device 1G (see FIG. 8), and an imaging lens 18I instead of the imaging lens 18G. Since the configuration other than the element image lens group 11I and the imaging lens 18I in the image pickup apparatus 1I is the same as that shown in FIG. 8, the same reference numerals are given and the description thereof is omitted.

  The element image lens group 11I generates an element image group of the subject S. The element image lens group 11I includes a plurality of concave lenses L1I, L1I,... Arranged in an array on the same plane orthogonal to the optical axis.

  The concave lens (element image optical system) L1I is configured to generate an element image by forming an image (virtual image) of the subject S when light from the subject S enters. The light emitted from the concave lens L1I enters the corresponding field lens L4G. Here, the concave lens L1I has a negative focal length, and forms a virtual image of the element image on the image-side focal plane G.

  The imaging lens (imaging optical system) 18I forms an element image formed by each concave lens L1I of the element image lens group 11I at another position. Then, the focal length of the imaging lens 18I is set so that the image-side focal plane G and the position where the second imaging direction adjustment lens 19C is installed have a conjugate relationship with respect to the imaging lens 18I. .

  By installing the imaging lens 18I in this manner, a virtual image of the element image group formed on the image-side focal plane G by the element image lens group 11I is placed on the second photographing direction adjustment lens 19C by the imaging lens 18I. Further, the lateral magnification is reduced by each of the afocal optical systems 131 and formed on the corresponding image sensor D1.

[Configuration of Imaging Device (Eleventh Embodiment)]
Next, with reference to FIG. 11, the configuration of an imaging apparatus 1J according to the eleventh embodiment of the present invention will be described. FIG. 11 is a schematic diagram schematically showing the configuration of the imaging apparatus according to the eleventh embodiment of the present invention. Here, the optical path of light that passes through the principal point of the concave lens L1J of the element image lens group 11J and enters the concave lens L1J of the element image lens group 11J from the point O is schematically illustrated. Further, the optical path of light from a point with a virtual image formed on the image-side focal plane G is schematically shown by a thick line, and is incident on the principal point of the concave lens L1J at the right end of the element image lens group 11J. The optical path of the light passing through the outer edge portion of the field lens L4J of the field lens group 15J is schematically shown. As illustrated in FIG. 11, the imaging device 1J captures an elemental image group of the subject S.

  The image pickup apparatus (element image group image pickup apparatus) 1J includes an element image lens group 11J instead of the element image lens group 11I of the image pickup apparatus 1I (see FIG. 10), a field lens group 15J instead of the field lens group 15G, A first shooting direction adjustment lens 17J is provided instead of the first shooting direction adjustment lens 17C. Since the configuration other than the element image lens group 11J, the field lens group 15J, and the first imaging direction adjustment lens 17J in the image pickup apparatus 1J is the same as that shown in FIG. 10, the same reference numerals are given and description thereof is omitted. To do.

  The element image lens group 11J generates an element image group of the subject S. The element image lens group 11J includes a plurality of concave lenses L1J, L1J,... Arranged in an array on the same plane orthogonal to the optical axis.

  The concave lens (element image optical system) L1J is an element in which light from the subject S is incident to form an image (virtual image) of the subject S to generate an element image. The light emitted from the concave lens L1J enters the corresponding field lens L4J. Here, the concave lens L1J has a negative focal length and forms a virtual image of the element image on the image-side focal plane G.

  The field lens group 15J transmits light incident from the element image lens group 11J to the first photographing direction adjustment lens 17J. The field lens group 15J includes a plurality of field lenses L4J, L4J,... Arranged in an array on the same plane orthogonal to the optical axis.

  The field lens L4J corresponds to each concave lens L1J of the element image lens group 11J, and transmits light incident from the corresponding concave lens L1J to the first photographing direction adjusting lens 17J. Here, the center of the corresponding field lens L4J is placed on a straight line passing through the center of each concave lens L1J from the point O on the subject S side. The apertures of the concave lens L1J and the field lens L4J are point O Is proportional to the distance in the optical axis direction. Then, the optical path of the light emitted from the field lens L4J through the principal point of the concave lens L1J and passing through the outer edge portion of the field lens L4J extends from a straight line (indicated by a dotted line in FIG. 11) passing from the point O to the outer edge portion. The concave lens L1J and the field lens L4J are arranged so as to coincide with the line. Then, the light emitted from the field lens L4J through the principal point of each concave lens L1J of the element image lens group 11J converges to the principal point of the imaging lens 18I, and then passes through the second photographing direction adjusting lens 19C to be parallel. It becomes light. Thus, by providing the field lens group 15J between the element image lens group 11J and the first shooting direction adjustment lens 17J, light from the element image lens group 11J can be efficiently transmitted to the first shooting direction adjustment lens 17J. Can do.

  The first shooting direction adjustment lens (first direction adjustment lens system) 17J adjusts the direction in which the element image generated by the element image lens group 11J is shot. Here, with respect to the first photographing direction adjusting lens 17J, the first photographing is performed so that the point O on the subject S side as viewed from the element image lens group 11J and the principal point of the imaging lens 18I have a conjugate relationship. The direction adjustment lens 17J and the imaging lens 18I are set apart from each other by a distance larger than the focal length of the first photographing direction adjustment lens 17J. Accordingly, the first photographing direction adjusting lens 17J can set the direction in which the element image generated by the element image lens group 11J is photographed from the center of each concave lens L1J to the point O. By doing so, it is possible to widen the viewing zone when reproducing the stereoscopic image by displaying the element image captured by the imaging device 1J on the IP display device.

[Modifications of the fourth, fifth, eighth and ninth embodiments]
The imaging devices 1C, 1D, 1G, and 1H include an image conversion optical system that inverts the element image in a point-symmetric manner between each convex lens L3 of the afocal optical lens group 13 and the imaging element D1. Also good. Here, with reference to FIG.12 and FIG.13, imaging device 1H 'provided with the image conversion optical system 20 is demonstrated. FIG. 12 is a schematic diagram schematically illustrating the configuration of an imaging apparatus including an image conversion optical system. FIG. 13 is a schematic diagram schematically illustrating an example of an image conversion optical system, (a) is a schematic diagram schematically illustrating an image conversion optical system including a refractive index distribution lens, and (b) is (C) is a schematic diagram schematically showing an image conversion optical system composed of a thick convex lens, (c) is a schematic diagram schematically showing an image conversion optical system composed of a field lens and a convex lens, and (d) is a schematic diagram. FIG. 5 is a schematic diagram schematically showing another image conversion optical system composed of a field lens and a convex lens. Here, the case where the image conversion optical system 20 is added to the configuration of the imaging device 1H will be described as an example, but the image conversion optical system 20 may be added to the configuration of the imaging devices 1C, 1D, and 1G. Good.

  As shown in FIG. 12, the imaging device (element image group imaging device) 1H ′ captures an element image group of the subject S. The imaging apparatus 1H ′ is configured by adding an image conversion optical system 20 to the imaging apparatus 1H (see FIG. 9). Since the configuration other than the image conversion optical system 20 in the imaging apparatus 1H ′ is the same as that shown in FIG. 9, the same reference numerals are given and the description thereof is omitted.

  The image conversion optical system 20 reverses the element image input from the convex lens L3 in a point-symmetric manner. The image conversion optical system 20 is two-dimensionally arranged corresponding to each image sensor D1. The element image inverted here is output to the image sensor D1.

  Here, when an elemental image group captured by the imaging devices 1C, 1D, 1G, and 1H is displayed on a conventional IP display device, a stereoscopic image (not shown) whose depth is inverted compared to the captured subject S is shown. Is played back. However, when each captured element image group is displayed on a conventional IP display device by inverting each element image symmetrically by the image conversion optical system 20, a stereoscopic image having the same depth as the subject S is reproduced. can do.

  The image conversion optical system 20 can be composed of an optical system having an afocal function. Here, an example of the image conversion optical system 20 will be described with reference to FIG. For example, as shown in FIG. 13A, the image conversion optical system 20 may include refractive index distribution lenses 21, 21,... With a refractive index decreasing in the radial direction. 13A shows a case where five refractive index distribution lenses 21, 21,... Are arranged in the horizontal direction, the image conversion optical system 20 is an element image captured by the image sensor D1. The number of gradient index lenses 21 is the same as the number of. For example, when a single element image is picked up by the image pickup device D1, it is composed of one refractive index distribution lens 21, and when a plurality of element images are picked up, it is arranged at a position where each element image is incident. Are composed of a plurality of gradient index lenses 21, 21,. The refractive index distribution lens 21 has an afocal function and inverts the incident element image in a point-symmetric manner around the optical axis of the refractive index distribution lens 21 and outputs the image to the image sensor D1.

  Further, as shown in FIG. 13B, the image conversion optical system 20 may be composed of thick convex lenses 22, 22,. The image conversion optical system 20 includes thick convex lenses 22 of the same number as the number of element images picked up by the image pickup device D1. The thick convex lens 22 has an afocal function, and the incident element image is inverted point-symmetrically around the optical axis of the thick convex lens 22 and emitted to the image sensor D1.

  Further, as shown in FIG. 13C, the image conversion optical system 20 is an element image conversion including a field lens 23a arranged in the optical axis direction and two convex lenses 23b and 23c constituting the afocal optical system. It is good also as comprising optical system 23,23, .... The image conversion optical system 20 is composed of the same number of element image conversion optical systems 23 as the number of element images picked up by the image sensor D1. The element image conversion optical system 23 has an afocal function, and the incident element image is inverted to be point-symmetric about the optical axis of the element image conversion optical system 23 and is emitted to the image sensor D1. . Note that light can be efficiently incident on the convex lens 23b by the field lens 23a.

Further, as shown in FIG. 13D, the image conversion optical system 20 is composed of elemental image conversion optical systems 24, 24,... Composed of field lenses 24a and convex lenses 24b arranged in the optical axis direction. It is good as well. The image conversion optical system 20 includes the same number of element image conversion optical systems 24 as the number of element images picked up by the image sensor D1. Here, the field lens 24a is placed at a position where the element image is imaged by the afocal optical system 131 (see FIG. 12), a convex lens from the field lens 24a doubled spaced positions of the focal length _{f 24b} of the convex lens 24b by placing 24b, doubled spaced positions further focal length f _24b from the convex lens 24b, lateral magnification with respect to the afocal optical system 131 thus imaged element image is an element image of -1 is generated The Therefore, by installing the image pickup device D1 at this position, the image conversion optical system 20 converts the element image obtained by inverting the incident element image symmetrically about the optical axis of each element image conversion optical system 24. An image can be formed on the image sensor D1.

[Other variations of the fourth, fifth, eighth and ninth embodiments]
Furthermore, the imaging devices 1, 1A, 1B, 1C, 1D, 1G, and 1H may include an arithmetic processing unit that inverts the element image captured by the imaging element D1 in a point-symmetric manner. Here, with reference to FIG. 14, the imaging device 1H ″ including the arithmetic processing unit 25 will be described. FIG. 14 is a schematic diagram schematically illustrating the configuration of the imaging device including the arithmetic processing unit. Here, a case where the arithmetic processing unit 25 is added to the configuration of the imaging device 1H will be described as an example, but the arithmetic processing unit 25 is added to the configuration of the imaging devices 1, 1A, 1B, 1C, 1D, and 1G. It is good.

  As illustrated in FIG. 14, the imaging device (element image group imaging device) 1H ″ captures the elemental image group of the subject S. The imaging device 1H ″ calculates to the imaging device 1H (see FIG. 9). A processing unit 25 is added. Since the configuration other than the arithmetic processing unit 25 in the imaging apparatus 1H ″ is the same as that shown in FIG.

  The arithmetic processing unit 25 inverts each elemental image captured by the image sensor D1 in a point-symmetric manner by electrical calculation processing. Here, when an elemental image group captured by the imaging devices 1, 1A, 1B, 1C, 1D, 1G, 1H is displayed on a conventional IP display device, the depth is inverted compared to the captured subject S. The three-dimensional image is reproduced, but when the element image group is displayed on a conventional IP display device by inverting each element image in a point-symmetric manner by the arithmetic processing unit 25, it is the same as the subject S. A depth stereoscopic image can be reproduced.

[Configuration of Display Device (First Embodiment)]
Next, with reference to FIG. 15, the structure of the display apparatus 5 which is 1st embodiment of this invention is demonstrated. FIG. 15 is a schematic diagram schematically showing the configuration of the display device according to the first embodiment of the present invention. Here, the optical path of light emitted vertically from the surface of the display element D5 is schematically illustrated.

  The display device (stereoscopic image display device) 5 is indicated by an element image group captured by the imaging devices 1 and 1A (see FIGS. 1 and 2) or an element image group generated by a computer (not shown). A stereoscopic image (not shown) is displayed. The display device 5 includes a display element group 54 instead of the imaging element group 14 of the imaging device 1 (see FIG. 1). Since the configuration other than the display element group 54 in the display device 5 is the same as that shown in FIG. 1, the same reference numerals are given and the description thereof is omitted.

  The display element group 54 displays an element image group input from the outside. The display element group 54 includes a plurality of display elements D5 arranged on the optical axes of the convex lenses L1, L2, and L3 on the same plane orthogonal to the optical axes of the element image lens group 11 and the afocal optical lens group 13. Is done. Here, the display elements D5 of the display element group 54 are arranged at a predetermined interval in order to install drive signal lines, output signal lines, and the like. The element image group displayed here is an image captured by the imaging device 1, 1A (see FIGS. 1 and 2) or generated by a computer, and corresponds to each display element D5. Consists of element images. If the spatial position information of the subject (not shown) is known, the element image group of the subject can be generated by the computer by tracing the optical path in the imaging devices 1 and 1A backward from the subject. is there. If the spatial position information of the subject is known, a conventional IP imaging device (not shown) or imaging devices 1B to 1J, 1H ′, 1H ″ (see FIGS. 3 to 12 and 14). The element image group of the subject can also be generated by the computer by going back the optical path in () backward from the subject.

  The display element (image display means) D5 corresponds to the convex lens L1 and the afocal optical system 131 and displays an element image input from the outside. The light from the element image displayed here is incident on the convex lens L3. The light from the subject S (see FIGS. 1 and 2) passes through the element image lens group 11 and the afocal optical lens group 13 and reaches the image sensor group 14 by the imaging devices 1 and 1A. Follow the light path in reverse. Thereby, the display device 5 can reproduce a stereoscopic image (not shown) of the subject.

  The width of the display element D5 is smaller than the apertures of the convex lenses L1, L2, and L3, and the display elements D5 are arranged at a predetermined interval, but are displayed on each display element D5 by the afocal optical system 131. Since the element image is enlarged to the size of the aperture of the convex lenses L1, L2, and L3 and emitted, a stereoscopic image can be reproduced using all the information of the element image.

  Here, when displaying the element image group on the display element group 54, if the element image group captured by the imaging devices 1 and 1A is displayed as it is, the depth is larger than that of a subject (not shown) to be imaged. An inverted stereoscopic image is reproduced. Therefore, information obtained by inverting each element image in a point symmetry with respect to the center of the element image may be input to the display element group 54. The inversion process may be realized by either software or hardware.

  Similarly, the image pickup device 1, 1 </ b> A (see FIGS. 1 and 2) captures an image on a display device (not shown) including a display element group 54 instead of the image pickup device group 14 of the image pickup device 1 </ b> A (see FIG. 2). By inputting an element image group or an element image group generated by a computer (not shown), a stereoscopic image (not shown) indicated by the element image group can be reproduced.

[Configuration of Display Device (Second Embodiment)]
Next, with reference to FIG. 16, the structure of the display apparatus 5B which is 2nd embodiment of this invention is demonstrated. FIG. 16 is a schematic diagram schematically showing the configuration of the display device according to the second embodiment of the present invention. Here, the optical path of light emitted vertically from the surface of the display element D5 is schematically illustrated.

  The display device (stereoscopic image display device) 5B is a stereoscopic image (not shown) represented by an element image group captured by the imaging device 1B (see FIG. 3) or an element image group generated by a computer (not shown). )). The display device 5B includes a display element group 54 instead of the image pickup element group 14 of the image pickup apparatus 1B. The display element group 54 in the display device 5B is the same as the display element group 54 of the display device 5 shown in FIG. 15, and the configuration other than the display element group 54 in the display device 5B is the same as that shown in FIG. Since they are the same, the same reference numerals are given and description thereof is omitted.

  If the spatial position information of the subject (not shown) is known, the element image group of the subject can be generated by the computer by tracing the optical path in the imaging device 1B backward from the subject. The optical path of a conventional IP imaging device (not shown) and imaging devices 1, 1A, 1C-1J, 1H ′, 1H ″ (see FIGS. 1, 2, 4-12, and 14). The element image group of the subject can be generated by the computer by going back from the subject.

  The element image light displayed on the display element D5 of the display device 5B is transmitted from the subject S (see FIG. 3) by the imaging device 1B to the element image lens group 11, the field lens group 15B, the photographing direction adjustment lens 16B, and the like. The optical path from the afocal optical lens group 13 to the image sensor group 14 is reversed. Thereby, the display device 5B can reproduce a stereoscopic image (not shown) of the subject.

  Here, when a stereoscopic image is reproduced by the IP display device, when the observer (not shown) moves, the stereoscopic image changes according to the observation position. At this time, a moving range in which the observer can correctly observe the stereoscopic image is called a viewing zone. When the observer observes from a certain position, the viewing zone is maximized when light from the centers of all element images intersects at this position. Therefore, when the observer observes from the point O, the light from the center of all the element images is caused to intersect the point O by the photographing direction adjusting lens 16B as in the display device 5B, as shown in FIG. Compared with the display device 5, the viewing area can be widened.

[Configuration of Display Device (Third Embodiment)]
Next, the configuration of a display device 5C according to the third embodiment of the present invention will be described with reference to FIG. FIG. 17 is a schematic diagram schematically showing the configuration of the display device according to the third embodiment of the present invention. Here, the optical path of light from the center of the element image that is emitted perpendicularly from the surface of the display element D5 is schematically illustrated.

  The display device (stereoscopic image display device) 5C is a group of element images captured by the imaging devices 1C, 1E, 1G, and 1I (see FIGS. 4, 6, 8, and 10) or a computer (not shown). The three-dimensional image (not shown) indicated by the element image group generated by is reproduced. The display device 5C includes a display element group 54 instead of the image sensor group 14 of the image pickup apparatus 1C (see FIG. 4). The display element group 54 in the display device 5C is the same as the display element group 54 of the display device 5 shown in FIG. 15, and the configuration other than the display element group 54 in the display device 5C is the same as that shown in FIG. Since they are the same, the same reference numerals are given and description thereof is omitted.

  If the spatial position information of the subject (not shown) is known, the element image group of the subject can be generated by the computer by tracing the optical path in the imaging device 1C backward from the subject. , A conventional IP imaging device (not shown), and imaging devices 1, 1A, 1B, 1D, 1F, 1H, 1J, 1H ′, 1H ″ (FIGS. 1 to 3, 5, 7, and FIG. 9, 11, 12, and 14), the element image group of the subject can also be generated by the computer.

  The light of the element image displayed on the display element D5 of the display device 5C is the light from the subject S (see FIG. 4) by the image pickup device 1C, the element image lens group 11C, the first photographing direction adjustment lens 17C, and the imaging lens. 18C, the second imaging direction adjustment lens 19C and the afocal optical lens group 13 and the optical path from reaching the imaging element group 14 are traced in reverse. Accordingly, the display device 5C can reproduce a stereoscopic image (not shown) of the subject.

  The width of the display element D5 is smaller than the apertures of the convex lenses L1, L2, and L3, and the display elements D5 are arranged at a predetermined interval, but are displayed on each display element D5 by the afocal optical system 131. Since the element image is enlarged to the size of the aperture of the convex lenses L1, L2, and L3 and emitted, a stereoscopic image can be reproduced using all the information of the element image.

[Configuration of Display Device (Fourth Embodiment)]
Next, the configuration of a display device 5D that is the fourth embodiment of the present invention will be described with reference to FIG. FIG. 18 is a schematic diagram schematically showing a configuration of a display device according to the fourth embodiment of the present invention. Here, the optical path of light from the center of the element image that is emitted perpendicularly from the surface of the display element D5 is schematically illustrated.

  The display device (stereoscopic image display device) 5D includes imaging devices 1D, 1F, 1H, 1J, 1H ′, 1H ″ (FIGS. 1 to 3, 5, 7, 9, 11, 12, and 14. The display device 5D reproduces a three-dimensional image (not shown) indicated by the element image group captured by the reference (referred to) or the element image group generated by a computer (not shown). 15 is replaced with a display element group 54. The display element group 54 in the display device 5D is the same as the display element group 54 of the display device 5 shown in FIG. Since the configuration other than the display element group 54 in 5D is the same as that shown in FIG. 5, the same reference numerals are given and description thereof is omitted.

  If the spatial position information of the subject (not shown) is known, the element image group of the subject can be generated by the computer by tracing the optical path in the imaging device 1D backward from the subject. The optical path of a conventional IP imaging device (not shown) and imaging devices 1, 1 </ b> A to 1 </ b> C, 1 </ b> E, IG, and 1 </ b> I (see FIGS. 1 to 4, 6, 8, and 10) from the subject. Conversely, it is possible to generate an element image group of a subject by a computer by going back.

  The element image light displayed on the display element D5 of the display device 5D is transmitted from the subject S (see FIG. 5) by the imaging device 1D to the element image lens group 11C, the first photographing direction adjustment lens 17D, and the imaging lens. 18C, the second imaging direction adjustment lens 19C and the afocal optical lens group 13 and the optical path from reaching the imaging element group 14 are traced in reverse. Thereby, the display device 5D can reproduce a stereoscopic image (not shown) of the subject.

  Then, when the observer observes from the point O, the light from the center of all the element images is caused to intersect with the point O by the first photographing direction adjusting lens 17D as in the display device 5D, as shown in FIG. The viewing zone can be widened compared to the display device 5C shown.

  Similarly, a display device (not shown) including a display element group 54 instead of the image pickup element group 14 of the image pickup apparatuses 1E to 1J and 1H ′ (see FIG. 6 to FIG. 12) corresponds to each of the image pickup apparatuses 1C to 1C. 1J, 1H ′, 1H ″ (see FIGS. 4 to 14), or by inputting an element image group generated by a computer (not shown), the element image group indicates the element image group. 3D images (not shown) can be reproduced.

It is the schematic diagram which showed typically the structure of the imaging device which is 1st embodiment of this invention. It is the schematic diagram which showed typically the structure of the imaging device which is 2nd embodiment of this invention. It is the schematic diagram which showed typically the structure of the imaging device which is 3rd embodiment of this invention. It is the schematic diagram which showed typically the structure of the imaging device which is the 4th embodiment of this invention. It is the schematic diagram which showed typically the structure of the imaging device which is the 5th Embodiment of this invention. It is the schematic diagram which showed typically the structure of the imaging device which is the 6th Embodiment of this invention. It is the schematic diagram which showed typically the structure of the imaging device which is the 7th Embodiment of this invention. It is the schematic diagram which showed typically the structure of the imaging device which is 8th Embodiment of this invention. It is the schematic diagram which showed typically the structure of the imaging device which is the 9th Embodiment of this invention. It is the schematic diagram which showed typically the structure of the imaging device which is the 10th Embodiment of this invention. It is the schematic diagram which showed typically the structure of the imaging device which is the 11th embodiment of this invention. It is the schematic diagram which showed typically the structure in case the imaging device which is 9th Embodiment of this invention is further provided with an image conversion optical system. Schematic diagram schematically showing an example of an image conversion optical system, (a) is a schematic diagram schematically showing an image conversion optical system composed of a gradient index lens, and (b) is a thick convex lens. Schematic diagram schematically showing the configured image conversion optical system, (c) is a schematic diagram schematically showing the image conversion optical system composed of a field lens and a convex lens, and (d) is a schematic diagram of the field lens. It is the schematic diagram which showed typically the other image conversion optical system comprised from a convex lens. It is the schematic diagram which showed typically the structure in case the imaging device which is 9th Embodiment of this invention is further provided with an arithmetic processing part. It is the schematic diagram which showed typically the structure of the display apparatus which is 1st embodiment of this invention. It is the schematic diagram which showed typically the structure of the display apparatus which is 2nd embodiment of this invention. It is the schematic diagram which showed typically the structure of the display apparatus which is 3rd embodiment of this invention. It is the schematic diagram which showed typically the structure of the display apparatus which is the 4th embodiment of this invention. An explanatory diagram for explaining a conventional IP system, (a) is a schematic diagram schematically showing a configuration of an apparatus for photographing an element image group by a conventional IP system, and (b) is a three-dimensional image by a conventional IP system. It is a schematic diagram which shows typically the structure of the apparatus which displays an image. Schematic diagram schematically showing a conventional IP imaging device for imaging elemental image groups with high resolution, (a) is a schematic diagram schematically showing a conventional IP imaging device, (b) ) Is a schematic diagram schematically showing a cross section of the imaging device shown in FIG.

Explanation of symbols

1, 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I, 1J, 1H ′, 1H ″ image pickup device (element image group image pickup device)
11, 11B, 11C, 11E, 11G, 11H, 11I, 11J Element image lens group L1, L1B, L1C, L1E, L1G, L1H, L1I, L1J Convex lens (element image optical system)
13 Afocal optical lens group 131 Afocal optical system L2 Convex lens (first condensing optical system)
L3 Convex lens (second condensing optical system)
D1 image pickup device (image pickup means)
16B Shooting direction adjustment lens (direction adjustment lens system)
17C, 17D, 17F, 17H, 17J First photographing direction adjustment lens (first direction adjustment lens system)
18C, 18E, 18G, 18I Imaging lens (imaging optical system)
19C Second imaging direction adjustment lens (second direction adjustment lens system)
20 Image conversion optical system 5, 5B, 5C, 5D Display device (stereoscopic image display device)
D5 display element (image display means)

Claims (8)

An element image group imaging device configured to image an element image group, which is an image for displaying a stereoscopic image of a subject, including a plurality of element images,
An element image lens group in which a plurality of element image optical systems that form the image of the subject to generate the element image are arranged on the same plane orthogonal to the optical axis of the element image optical system;
Corresponding to each of the elemental image optical systems, a first condensing optical system for condensing light from the corresponding elemental image optical system, and an optical axis of the first condensing optical system An afocal optical system comprising a second condensing optical system that condenses the light from the first condensing optical system with the same aperture as the first condensing optical system. A plurality of afocal optical lens groups arranged on the same plane orthogonal to the optical axis of the focal optical system;
The elemental image lens system and the afocal optical lens group are arranged on the same plane orthogonal to the optical axis of the elemental image lens group and correspond to each of the elemental image optical system and the afocal optical system, and the corresponding elemental image optical system. And a plurality of image capturing means for capturing the elemental image formed by the afocal optical system;
With
An element image group imaging apparatus, wherein a focal length of the first condensing optical system is larger than a focal length of the second condensing optical system.   Installed between the afocal optical lens group and the elemental image lens group, and converts light emitted from a certain point on the subject side of the elemental image optical system and passing through the principal point of the elemental image optical system into parallel light The element image group imaging apparatus according to claim 1, further comprising: a direction adjusting lens system that performs the adjustment. An element image group imaging device configured to image an element image group, which is an image for displaying a stereoscopic image of a subject, including a plurality of element images,
An element image lens group in which a plurality of element image optical systems that form the image of the subject to generate the element image are arranged on the same plane orthogonal to the optical axis of the element image optical system;
Either the light transmitted through the element image optical system through the optical axis of the element image optical system or the light passing through the principal point of the element image optical system from a certain point on the subject side of the element image optical system A first directional lens system that converges to a single point;
An imaging optical system having a principal point at a point where light is converged by the first direction adjustment lens system, and imaging an element image group formed by the element image lens group at another position;
A second direction adjusting lens system that converts the light converged by the first direction adjusting lens system and passed through the principal point of the imaging optical system into parallel light;
A first condensing optical system that corresponds to one or a plurality of the element image optical systems, and condenses the light that has passed through the corresponding element image optical system and is incident from the second direction adjustment lens system; And a second condenser that is installed on the optical axis of the first condensing optical system and condenses the light from the first condensing optical system with the same aperture as the first condensing optical system. An afocal optical lens group in which a plurality of afocal optical systems including a condensing optical system are arranged on the same plane orthogonal to the optical axis of the afocal optical system;
Images arranged on the same plane orthogonal to the optical axis of the elemental image lens group and the afocal optical lens group , corresponding to each of the afocal optical systems, and imaged by the corresponding afocal optical system A plurality of image capturing means for capturing
With
An element image group imaging apparatus, wherein a focal length of the first condensing optical system is larger than a focal length of the second condensing optical system.   A plurality of image conversions having an afocal function between the afocal optical system and the image capturing means, and converting the element image incident from the afocal optical system into point symmetry with respect to the center of the element image The element image group imaging apparatus according to claim 3, further comprising an optical system. A stereoscopic image display device configured to display a stereoscopic image by inputting an elemental image group, which is an image for displaying a stereoscopic image of a subject, including a plurality of elemental images,
Image display means for displaying the element image;
Corresponding to each of the image display means, a second condensing optical system for condensing light from the corresponding image display means, and installed on the optical axis of the second condensing optical system, An afocal optical system including a first condensing optical system that condenses light from the second condensing optical system with the same aperture as the second condensing optical system is provided. A plurality of afocal optical lens groups arranged on the same plane orthogonal to the optical axis of the system;
An element image optical system that corresponds to each of the image display means and the afocal optical system, emits light from the corresponding afocal optical system, and reproduces a stereoscopic image of the subject. A plurality of elemental image lens groups arranged on the same plane orthogonal to the optical axis of the system;
With
The image display means is arranged on the same plane orthogonal to the optical axis of the element image lens group and the afocal optical lens group,
A stereoscopic image display device, wherein a focal length of the first condensing optical system is larger than a focal length of the second condensing optical system.   A direction adjusting lens system is provided between the afocal optical lens group and the elemental image lens group, and converges the light transmitted through the afocal optical system through the optical axis of the afocal optical system at one point. The stereoscopic image display apparatus according to claim 5, wherein A stereoscopic image display device configured to display a stereoscopic image by inputting an elemental image group, which is an image for displaying a stereoscopic image of a subject, including a plurality of elemental images,
A plurality of image display means for displaying an image composed of one or a plurality of the element images;
Corresponding to each of the image display means, a second condensing optical system for condensing light from the corresponding image display means, and installed on the optical axis of the second condensing optical system, An afocal optical system including a first condensing optical system that condenses light from the second condensing optical system with the same aperture as the second condensing optical system is provided. A plurality of afocal optical lens groups arranged on the same plane orthogonal to the optical axis of the system;
A second direction adjustment lens system that converges light transmitted through the afocal optical system through the optical axis of the afocal optical system into one point;
An imaging optical system having a principal point at a point where light is converged by the second direction adjustment lens system, and imaging an elemental image group formed by the afocal optical lens group at another position;
A first direction adjusting lens system that converts the light converged by the second direction adjusting lens system and passed through the principal point of the imaging optical system into parallel light, or converges to a certain point;
An element image optical system that corresponds to each of the element images imaged by the imaging optical system, emits light from the corresponding element image, and reproduces the stereoscopic image of the subject. A plurality of elemental image lens groups arranged on the same plane orthogonal to the optical axis of the optical system;
With
The image display means is arranged on the same plane orthogonal to the optical axis of the element image lens group and the afocal optical lens group,
A stereoscopic image display device, wherein a focal length of the first condensing optical system is larger than a focal length of the second condensing optical system.   A plurality of image conversion optics having an afocal function between the afocal optical system and the image display means and converting the element image incident from the image display means into point symmetry with respect to the center of the element image The stereoscopic image display apparatus according to claim 7, further comprising a system.

Images