JPS6298895A - Television camera - Google Patents

Abstract

PURPOSE:To see a reproducing image as a three-dimensional picture by providing an inclined half mirror for transmitting incident light of either one of visual points of both sides and a mirror for reflecting and making incident the incident light of the other visual point on the back surface of the half mirror on the front part of an optical input system. CONSTITUTION:A video camera 20 can perform an ordinary operation. When a stereoscopic image is desired to be picked up, a monitoring connector 22 is removed, an intermediate connector 41 is interposed, and an optical adapter 30 is mounted on a lens system 21. Thereby, optical shutters 32, 32a become opaqual alternately at every one frame and the incident light of both sides is inputted to the lens system 21 alternately. Accordingly, from the video camera 20, the video signals of both sides of one picture are supplied to a video tape recorder alternately and in a finder type monitor television 23, only the video signal of the right visual point is monitored. When a recorded video is stereoscopically reproduced in a television receiver, an optical shutter glasses are worn to see the video which is alternately opened and closed by a switching signal generated by a circuit adapter 40 or a television receiver or the like.

Description

[Detailed Description of the Invention] [Industrial Application Field] What has not yet been invented is a television camera for supplying video signals captured from left and right viewpoints to a tape recorder or directly to a television receiver in order to reproduce stereoscopic images. It is related to.

[Prior art and problems to be solved by the invention] Fig. 5 shows this type of stereoscopic imaging device, in which an object 1 is imaged by left and right television cameras 2, and the respective video signals are recorded screen by screen. to record on the video tape recorder 3. During reproduction, the reproduced image on the television receiver 5 is viewed as a stereoscopic image through optical shutter glasses 4 whose left and right sides open and close alternately in synchronization with the switching. In other words, two television cameras are required to take an image of the object 1, which poses a problem in terms of cost, especially if it is not widely used in home video tape recorders.

It is therefore an object of the invention to provide a less expensive television camera of the type mentioned at the outset.

[Means for solving problems]

In order to achieve this object, the present invention tilts the imaging of either one of the viewpoints corresponding to the left and right eyes of a human being to the front part of the optical input system 10a of the television camera 10, as shown in FIG. The other image is captured through the half mirror 11 arranged on the mirror 12 and the back surface 11 of the half mirror 11.
Half mirror 1
Optical shutters 13 and 13a, which alternately open and close, are arranged in the incident optical path in front of the front surface 11a and the back surface 11b of 1, respectively.

[Effect]

Light Sha Nta 13. +3a opens and closes alternately each time the left and right video signals are output, so that the incident light from one of the left and right passes through the half mirror 11, and the incident light from the other passes through the mirror 12.
and is reflected by the back surface 11b of the half mirror 11 and alternately enters the optical input system 10a. Thereby, the television camera 10 alternately supplies left and right video signals to an image output device, such as a video tape recorder, a television receiver, a visual recognition device, a projector, a television receiver, and the like. By opening and closing the optical shutter glasses 18 in synchronization with the optical shutter 13.13a, the reproduced image of the image output device 15 can be viewed as a stereoscopic image.

[Embodiment of the Invention] In Fig. 82, numeral 20 is a video camera for a video tape recorder, and an optical adapter 30 according to the present invention is removably fitted into the front part of a lens system 21 of the video camera. Inside this adapter, half mirrors 31 that are inclined with respect to the surface of the lens system 21 are arranged, and in front of the half mirrors 31 are arranged parallel to the lens surface, for example, an optical shutter 32 made of liquid crystal, optical ceramic, etc. that becomes opaque when voltage is applied. has been done. Further, the mirror 33 is arranged such that its center is located at a position corresponding to approximately the distance between the left and right eyes with respect to the center of the half mirror 31. This mirror reflects the incident light from the left viewpoint on the back surface of the half mirror 31 due to its inclination angle, and makes the reflected light enter the lens system 21. Another optical shutter 32a is arranged in the incident optical path in front of the mirror 33.

40 is a circuit adapter equipped with an intermediate connector 41;
It consists of a video switching signal generation circuit 42 and two switching circuits 43 and 43a for monitor video output and optical shutter control controlled by the switching signal. The video switching signal generation circuit 42 is supplied with the monitor video signal through the intermediate connector 41, separates the vertical synchronizing signal therein, and generates a switching signal for each frame. This results in
The switching circuit 43 supplies either the left or right video signal to the finder type monitor television 23 through the intermediate connector 41 and the monitor connector 22 for each frame.

The operation is as follows.

The video camera 20 can perform normal operations, but when it is desired to capture a stereoscopic image, the monitor connector 22 is removed, the intermediate connector 41 is inserted, and the optical adapter 30 is attached to the lens system 21. As a result, the optical shutter 32
, 32a alternately become opaque every frame, and left and right incident light is alternately input to the lens system 21. Therefore, the video camera 20 supplies one screen of left and right video signals alternately to the video tape recorder, and the finder type monitor television 23 monitors only the video signal from the right viewpoint. When a recorded video is played back stereoscopically on a television receiver, the viewer wears optical shutter glasses that are alternately opened and closed by the circuit adapter 40 or a switching signal separately generated by the television receiver or the like.

Incidentally, in the above embodiment, the video switching signal generation circuit 42
In some cases, it may be possible to supply a video signal to be supplied to a video tape recorder.

FIG. 3 shows another embodiment, in which a half mirror 52 is arranged in front of a lens system 51 of a video camera 50 at an angle of 45'' with respect to the lens surface, and an optical shutter 53 is arranged further in front. On the left side of the half mirror 52, a mirror 54 similarly inclined at 45@ is arranged at a distance approximately equal to the distance between the eyes.The shape of this mirror is similar to that of placing the video camera 50 at the left viewpoint. The setting is such that the light incident on the lens system 51 at a visual angle of 47°, for example, enters the lens system 51 through the same path as the right viewpoint, so as to provide a similar visual sense.Then, the light shutter 53a of the left viewpoint is set.
The mirror 5 is tilted so as to reduce the required area.
4 and parallel to the optical axis of the lens system 51.

FIG. 4 shows another embodiment in which the optical adapter in the embodiment of FIG. 2 is replaced. Incidentally, the same reference numerals indicate the same parts as those in FIG. 2, and this optical adapter 60 protrudes to the right by having a half mirror tilted to the opposite side and provided with a mirror for the right viewpoint. Furthermore, in addition to being attached to the lens system 21, there is also a viewfinder type monitor television 61 for the left viewpoint.
It can be attached to the video camera 20 with screws 82. As a result, when the intermediate connector 41 is inserted in front of the monitor connector 22, the left and right optical shutters are switched alternately, the image on the right is played back on the viewfinder monitor TV 23, and the image on the left is played on the viewfinder monitor. It is reproduced on the television 61. Therefore, by looking at both viewfinder type monitor televisions 23°61 with both eyes at the same time, a stereoscopic image can be monitored.

Regarding the optical configuration inside the optical adapter, from the viewpoints of forming the left and right imaging surfaces symmetrically with respect to the optical input system of the TV camera, and reducing the mirror area to ensure visibility, Various modifications can be considered in which optical elements such as a half mirror and a lens are added. Further, although the above embodiment has been described as a video camera, it can also be implemented as a normal television camera image pickup tube, and it can also be configured to be fixed to the front part of the optical input system instead of being detachable.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to capture stereoscopic images with a single television camera, and therefore it is possible to realize an inexpensive imaging apparatus for stereoscopic images. In particular, if applied to a home video camera, it will be extremely advantageous in terms of cost.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle configuration of the present invention, FIG. 2 is a diagram showing the configuration of a video camera according to an embodiment of the present invention, and FIG. 3 is a sectional view of an optical input system of a television camera according to another embodiment. FIG. 4 is a diagram showing the configuration of a television camera according to yet another embodiment, and FIG. 5 is a schematic configuration diagram of a conventional stereoscopic imaging device using a television camera, which is the premise of the present invention. 10...TV camera, 20.50...Video camera, 11.31.52...Half mirror-112,3
3,54...Mirror 13.13a, 32.32a
, 53.53a... optical shutter, 30.60...
・Optical adapter, 40...Circuit adapter.

Claims (1)

[Claims] In a television camera for supplying video signals captured from left and right viewpoints to an image output device in order to reproduce stereoscopic images, incident light from either the left or right viewpoint is connected to the front part of the optical input system of the television lamella. an inclined half mirror that transmits light to the optical input system; a mirror that reflects the incident light from the other viewpoint on the back surface of the half mirror and enters the half mirror; and a mirror that is located in the incident optical path forward of the front surface and the back surface of the half mirror, respectively. A television lamella characterized by having a light shutter that opens and closes alternately.