JPS58137388A - Stereoscopic picture display - Google Patents

Abstract

PURPOSE:To increase a stereoscopic picture in sharpness by narrowing down the optical width of the image light of a dot image when it is made incident to a screen, and also narrowing down the optical width of the image light of a dot image when it is emitted from the screen. CONSTITUTION:A stereoscopic picture display 200 consists of a picture tube 6, optical path selector 7 arranged on the fluorescent screen 6a of the tube 6, and transmission type screen 9 arranged in front of the selector and on an observers' side 8. When a video signal is supplied to the picture tube 6, a picture is formed on the fluorescent screen 6a and light from the fluorescent screen 6a is passed through planoconvex lenses 71-75 of the optical path selector 7 and then supplied to the screen 9. The optical width of image light made incident to the screen 9 is narrowed down extremely.

Description

DETAILED DESCRIPTION OF THE INVENTION Generally, it is considered that light indicating the existence of an object (containing information such as color and brightness) emanates from each point constituting an object in all directions unless it is blocked by a wall or the like. Therefore,
If you look at this object from different angles, the direction of the light coming from each point on the object may change, or the light coming from a given point on the object may be blocked by something and disappear. Since the light coming from a predetermined point on the object is unobstructed and newly generated, the observer can perceive the object in a sequentially changed manner. In other words, it can be perceived and sensed as a three-dimensional object.

From this, when an object is photographed and then reproduced, light is emitted from each point that makes up the reproduced image, indicating its existence, just like the original object. In this case, the reproduced image can be perceived as a three-dimensional image.

In view of this problem, the present invention proposes a three-dimensional image display device capable of displaying a three-dimensional image whose aspect changes in the same way as the real thing depending on the viewer's viewing angle.

An embodiment of a stereoscopic image display device according to the present invention will be described below with reference to the drawings.

First, FIG. 1 shows an imaging device (100) in which a video signal for displaying a stereoscopic image to be supplied to the stereoscopic image display device of this example is formed.
This shows that.

In FIG. 1, (1) shows an image pickup tube, and an optical system (
3) is arranged. The optical system (3) has an optical path selector (4
) and a screen (5).

A plurality of optical path selectors (4), in this example five plano-convex lenses (41) to (45), are arranged horizontally. In this case, these plano-convex lenses (41) ~
The convex side of (45) faces the image pickup tube (1). A light shielding plate Lb1 is arranged on the side surface of these plano-convex lenses (41) to (45), and the plano-convex lenses (41)
A light shielding plate Lb2 having an opening Wo of a predetermined size is disposed on the plane 111 of (45) at a portion corresponding to the center thereof. Also, one of the plano-convex lenses (41) to (45) is focused at the center on the plane side, and the other one is focused on the plane formed by the end of the light shielding plate Lb1 on the convex side.゛It's designed to help you focus.

In this case, the plano-convex lens (41
) to (45) pass through their focal points, so when they exit from these plano-convex lenses (41) to (45), they become parallel rays, and in this case, the aperture Wo
Of the light that enters at an angle of ±0 or more, the light that enters at an angle of ±0 or more is blocked by the light shielding plate Lbl, and therefore
Of the incident light, only the incident light at an angle within ±θ will exit through the plano-convex lenses (41) to (45).

Mata 7, the screen (5) is a transparent screen, e.g.
t is made of ground glass and includes plano-convex lenses (41) to (
45) is attached to the end of the light shielding plate Lb1 on the convex side. That is, this screen (5) has a plano-convex lens (41)
~ (45) is arranged at the other focal position.

This screen (5) has plano-convex lenses (41) to (4).
The light captured in step 5) is supplied, and these lights form an image of 11Oto~050, which has been inverted upward, downward, leftward, and rightward, respectively.

Here, if we focus on the subject 010 point P1, this point P1
Of the light indicating the presence of 011 to θ1s, the emerging lights 111 to 115 pass through the apertures Wo, respectively, and are captured by the plano-convex lenses (41) to (4s) V(l, and the screen (5) @Oto-Os as described above.

A point image indicating the existence of the point Pl of the subject 01 is formed as a part of the image. In addition, the object 02 in front of the object O1
Focusing on the 0 point P2, among the light indicating the existence of this point P2, the light t21 to t25 that comes out in the direction of 021 to θ25
are plano-convex lenses (41) to (45) passing through the aperture Wo, respectively.
is captured at predetermined positions P21 to P2 on the screen (5).
5, and forms a point image indicating the existence of point P2 as a part of the above-mentioned 1) Oto~050.

Imaged on screen (5)! The image light from Oto~050 is supplied to the imaging surface (1a) of the imaging tube (1) via the imaging lens (2), and the image 01 is on the imaging surface (1a) of the imaging tube (1).
Me corresponding to 0 to 050 is imaged. Therefore, a video signal based on these values Oto-050, that is, a video signal 83D for stereoscopic image display, is obtained from the image pickup tube (1).

Further, FIG. 2 shows a stereoscopic image display device (200) of this example.

This stereoscopic image display device (200) includes a picture tube (6), an optical path selector (7) arranged on its fluorescent surface (6a),
It consists of a transmission screen (9) placed in front of it on the observer (8) side, and a video signal S3D formed by the above-mentioned imaging device (100) is supplied to the picture tube (6). .

When the video signal 830 is supplied to the picture tube (6), images 010' to 050' are formed on its fluorescent surface (6a).

These images O1o' to 050' are the images of the above-mentioned "Oxo" imaged on the screen (5) of the imaging device (100).
~050 m times, and are completely similar.

The optical path selector (optical path selector) is formed by plano-convex lenses (71) to (75) arranged horizontally.These plano-convex lenses (
A light shielding plate Lb1 is disposed on the side surface of the plano-convex lenses (71) to (75), and a light shielding plate Lb2 having an aperture Wo of a predetermined size at a portion corresponding to the center of the plano-convex lens (71) to (75) is disposed on the plane side of the plano-convex lenses (71) to (75). will be arranged. And these plano-convex lenses (71)
One focal point is set at the center of the plane side of (75), and the other focal point is set in front of the plane formed by the end of the light shielding plate Lbl on the convex side.

The optical path selector (7) includes plano-convex lenses (71) to (75).
The configuration is similar to that of the optical path selector (4) constituting the above-mentioned photographing device (100), except that the other focal point is not connected to the plane formed by the end of the light shielding plate Lbl on the convex side. be done. In this case, images 010' to 050' are my 0t
o-Os.

When the width of the optical path selector (7) in the horizontal direction is m times the width of the optical path selector (4) in the horizontal direction.

This optical path selector (7) includes plano-convex lenses (71) to (7).
5) and the image formed on the fluorescent surface (6a) *O1o'~0
5o' and a plano-convex lens (7
1) to (75), the end portion of the light shielding plate Lb1 is placed on the fluorescent surface (6a) of the picture tube (6).

Here, as in this example, the other focal point of the plano-convex lenses (71) to (75) is the plane formed by the end of the light shielding plate Lbl on the convex side, and therefore the fluorescent surface (68) of the picture tube (6). If it is not tied above but in front of it, the images O1O' to 05 formed on the fluorescent surface (6a) as shown by the solid line in FIG.
The image light from the point image of point Q at 0' is transmitted through a plano-convex lens (71
) to (75) and the width of the light that passes through the aperture Wo' is gradually narrowed until it reaches one point Q'r on the predetermined plane, that is, the culmination plane LO.
(The optical path selector (7) is configured to be completely similar to the optical path selector (4). In this case, the optical path selector (7) is connected to the optical path selector (4).
It is clear from the power distribution relationship that it functions symmetrically. ), the other focal point of the plano-convex lenses (71) to (75) is focused on the plane formed by the end of the light-shielding plate Lb1 on the convex side, and therefore on the fluorescent surface (6a) of the picture tube (6). In this case, the fluorescent surface (6
a) Image formed on gI! Point Q from 010' to 050'
The image light from the point image is transmitted through plano-convex lenses (71) to (75), respectively.
) and the aperture Wo', the light beam proceeds as a parallel light beam having a predetermined width, for example, the same width as the aperture Wo', and does not form an image as in this example.

Furthermore, it should be noted here that regardless of whether the other focus of the plano-convex lenses (71) to (75) is focused on the fluorescent surface (6a), the point image of point The general direction of movement of the image light from the point image is the same as the direction of movement of the image light coming out of the point image in the vertical direction. Considering this, the optical path selector (7) of this example also functions symmetrically to the optical path selector (4) described above when viewed macroscopically, although there are differences as described above.

Optical path selector (since the forces are configured and arranged as described above, the light path selector is formed on the fluorescent surface (6a).
The light emitted from the images 010' to 05o' passes through the plano-convex lenses (71) to (75), respectively, and then passes through the aperture Wo' at an angle of θ, forming the above-mentioned junction surface L.
It is supplied to the screen (9) placed at o at this angle.

Here, in particular, from point P1 of subject 01, θ11 to θ1, respectively.
5 Direction V (comes out, plano-convex lens (41) ~ (
45) Oxo~050 by the light captured by
Point images corresponding to the point images formed at the position pH""Fil as part of the image exist at positions P11' to p15' of images 010' to 050' formed on the fluorescent surface (6a). Then, the light emitted from these point images, that is, the point P of object 01
Lights t11 to t15 indicating the presence of 1 are plano-convex lenses (71)
~ (75), then pass through the opening Wo' and -0 respectively.
It advances with an angle of 11 to -015 and is fed to the screen (9) with this angle. Also, subject 0
2 from point P2 in the directions of θ21 to θ25, respectively, and captured by the plano-convex lenses (41) to (45).
The point image corresponding to the point image formed on 25 is the point image formed on the fluorescent surface (6
a) Position P2 of the picture frame Oxo'~050' formed above
1 to P25, and image light from these point images, that is, light indicating the existence of object 020 point P2/-21 to 125
is passed through the plano-convex lenses (71) to (75), and then the aperture W
o' with an angle of -1921 to -025, respectively, and are fed to the screen (9) with this angle.

The screen (9) is constructed as shown in FIG. That is, lenticular lenses (91) and (92) with a predetermined pitch P are attached to both sides of a diffuser plate (9o) so that their semicylindrical portions coincide with each other. In this case, lenticular lenses (91) (92
) is focused on the diffuser plate (90). Therefore, in this case, if the incident light L1 is incident on this screen (9) at an angle of -00, light L1' having a width t (= pO1) Se2) is transmitted from this screen (9) at an angle of θ0. It is ejected at an angle. That is, the incident light L centering on this screen (9)
1 and the transmitted light L1/ are substantially symmetrical.

Since the screen (9) is configured as described above, the image on the fluorescent surface (6a) (IJOto' ~ 050) is output from the screen at an angle of θ from the opening Wo' of the optical path selector (7). (9) The image light supplied with K advances from this screen (9) at an angle of 10. Here, in particular, the position pH of the image Q/l Oto' to Oso'
The image light emitted from the point images from ' to P15', that is, the object o
The light tll"'-'txs indicating the existence of the point P1 in point P1 is supplied to this screen (9) at an angle of -θl]~=015, so the light tll"'-'txs indicating the existence of point P1 of Further, the image light emitted from the point images at positions P21' to P25' of the images O1o' to 050', that is, the light 121"125 indicating the existence of point P2 of the object o2, ) are supplied at an angle of -1'21 to -025, respectively.
They advance from this screen (9) at angles of θ21 to θ25, respectively.

By the way, the image O1o' formed on the fluorescent surface (6a)
The narrower the width of the image light from the point image of ~050' when it exits the screen (9), the more advantageous it becomes. This is because the wider the light width becomes, the more the point image information is scattered, resulting in a decrease in the sharpness of the image displayed by this image light.

In this example, the optical path selector (7) is configured as described above, and the image 0 formed on the fluorescent surface (6a) is
The image lights from the point images 10' to 050' pass through the plano-convex lenses (71) to (75) and the aperture Wo', respectively, and their light widths are sequentially narrowed and supplied to one point on the imaging plane LoO,
A point image may be formed here, but since the screen (9) is arranged on this image formation plane Lo, this bone-filled screen ( 9) The width of the light when it enters the beam is made very narrow. Therefore, the optical width d of the image light of the fishbone that exits this screen (9) also becomes extremely narrow. In this FIG. 5, what is indicated by a broken line is that the optical path selector (7) is not configured as in this example, and the images oto'~ formed on the fluorescent surface (6a) are
The image light from the point image of 05o' passes through the aperture Wo',
This figure shows a case where the parallel light beams appear as parallel light beams having a predetermined width, for example, the same width as the aperture Wo', and are supplied to the screen (9). In this case, it goes without saying that the optical width d' of the point image light exiting from the screen (9) becomes extremely wide.

This example is configured as described above, and has a stereoscopic image display device (20
From the screen (9) constituting the image pickup device (1
The light corresponding to the light incident on the optical path selector (4) of 00) at a predetermined angle θ travels at the same angle θ. For example, point P1 of object 01 and point P2 of object o2
Yoshi optical path selector (4) Lights t11 to t15 and t15 and t corresponding to the lights t11 to t15 and /-21 to 125 incident at angles of θ11 to θ15 and θ21 to 025, respectively
21-125 is 1 this screen (9) and each 011
- θ15 and θ21 to θ25.

Therefore, an observer (8) observing in front of this stereoscopic image display device (200) can see objects 01 and 0 whose appearance changes variously depending on the viewing angle behind the screen (9).
2 VC-compatible stereoscopic images 01' and 02' can be viewed.

As described above, by using the stereoscopic image display device according to the present invention, the school inspector can perceive a good stereoscopic image.

Moreover, according to the stereoscopic image display device according to the present invention, the light width of the point image light when it is incident on the screen can be narrowed.
Since the light width of the point image light exiting from this screen is narrowed, the sharpness of the three-dimensional image displayed by this image light can be increased.

In addition, apart from the above embodiment, a photographic film is arranged at the rear end of the optical path selector (4) of the imaging device (100), and the optical path selector (7) of the stereoscopic image display device (200) is used for photographing.
A transmissive screen, such as ground glass, is placed at the rear end in place of the fluorescent surface (6a), and the above-mentioned film is used on the ground glass to form a plurality of images having parallax information, thereby displaying a three-dimensional image. This is also easily conceivable.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an example of an imaging device that forms an image signal for stereoscopic image display, FIG. 2 is a configuration diagram showing an example of a stereoscopic image display device according to the present invention, and FIG. Diagrams used for explanation; Figure #4 is a sectional view showing a specific example of a transmission screen; and Figure 5 is a diagram used for explanation of the present invention. (6) is a picture tube, (7) is a light track selector, (8) is an observer, and (9) is a transmission screen.

Claims (1)

[Claims] Image light from a plurality of cameras having parallax information formed according to light from the subject captured by the first optical path selector,
Through a second optical path selector that works symmetrically with the first optical path selector and is composed of a plurality of lenses, the incident light and the transmitted light are transmitted to a transmission screen that is made substantially symmetrical with respect to its surface. The stereoscopic image display device is configured to supply a stereoscopic image corresponding to the subject and to display a stereoscopic image corresponding to the subject.
A stereoscopic image characterized in that the focal points of the plurality of lenses constituting the optical path selector are set in front of the plurality of lenses, and the transmission screen is disposed on the connecting surface of the plurality of lenses. Display device.