SU58323A1 - Stereoscopic television device - Google Patents

Description

The present invention relates to an already known device for stereoscopic television using interlaced scanning in two electron-beam television transmitters that alternate between odd and even-numbered frames for the left and right eyes.

According to the invention, in such a device, the transmitted image is received on one television screen, in front of which a wire grid is placed at an appropriate distance, shielding even lines for the left eye and odd lines for the right eye, provided the image is viewed from a proper distance.

In FIG. 1 shows a transmitter circuit and FIG. 2 is an image viewing circuit on a receiving tube screen.

If, on the screen of the receiving tube (Fig. 2), one obtains a line-alternating left and right image with a vertical scan and observe it from a distance of the best view (25 cm) through a mechanical or optical raster with two eyes, then at a certain distance between the raster and the screen tube left

the eye will observe the lane of the left image, and the right eye will observe the strip of the right. With a fairly small raster, the full effect will be obtained.

This effect can be obtained in certain limits when the eyes are displaced from the perpendicular to the center of the screen in the lateral and vertical directions, as well as when the eye is removed from the screen by a greater distance than 25 cm, which is the reason why many people view the image simultaneously. mi

From the foregoing, the principle of obtaining a three-dimensional image implies the need to simultaneously transmit two images - one corresponding to the left eye, and the other corresponding to the right eye. To accomplish this, the object is designed with the help of two long-focusing O lenses and two mirrors 3 on the photosensitive screens of two iconoscopes I.

The left lens corresponding to the left eye projects the image of the object onto the left iconoscope, and the right lens corresponding to the right eye projects the same image onto the right iconoscope (Fig. 1).

To create a stereoscopic image, both axes of the lenses must be parallel and located at a distance of 65 mm (the distance between the axes of the lens of the eyes). Thus, both images are projected onto iconoscopes from different points of view.

The relatively small distance between the axes of the lenses (under normal conditions, a basis of 65 mm) and the considerable dimensions of the iconoscope force each image to be projected after its reflection by a mirror with a 90 ° angle.

Both images are reflected perpendicularly to mutually opposite sides, which allows the iconoscopes to be separated to the required distances.

The sweep at the receiving point is interlaced vertically, and when sweeping odd lines the left image must be transmitted, which, due to the presence of a raster in front of the screen of the receiving tube, is available only to the left eye, while scanning even even lines the right image should be transmitted the path is accessible only to the right eye.

BV is known for the known light inertia of the eye, both images are synthesized in the visual brain center, and this is how the image is obtained.

From the foregoing it follows that the iconoscopes must alternately switch during the change of the odd and even scan, and vice versa. This is achieved by alternately locking the iconoscopes for a time corresponding to the transfer of half a frame. This is easily achieved by alternately applying a negative potential to the iconoscopes from a special generator, which is synchronized by the frame signal after doubling the frequency of this signal (Fig. 1 - clamps to the iconoscope switching generator).

Thus, it is obvious that the analysis of both the left and right images is carried out through the line, and the transmission is carried out on the same channel.

In front of the D-D screen of the receiving tube (Fig. 2), the required distance from the side, the viewer, is a mechanical or optical raster (in the form of a grid) of vertical parallel wires, the diameter of which is equal to the intervals between them, and the number of wires is half the number of vertical scan lines.

To obtain a stereovideo effect with more points of view, it is more desirable to use a mechanical raster of calibrated round wires.

On the screen of the receiving tube, each image is also synthesized interlaced. Odd lines synthesize a interlaced left image and are accessible only to the left eye, even lines synthesize the right image and are accessible only to the right eye. Simultaneously with the creation of the three-dimensional effect, the discontinuity of the left image is compensated in the brain visual center by the right image m and vice versa.

FIG. 2 of the drawings, the letters L and B indicate, respectively, the left and right eyes of the viewer and the letter E — vertical scanning stripes (the odd lines are seen by the left and the even lines are the right eye of the viewer).

The above principle of transmission is carried out by pushing both iconoscopes on, with the voltage corresponding to the image transmitted at any time being highlighted on the total load resistance (Fig. 1).

In the circuit of FIG. 1, the focusing device is not shown because the device uses a conventional type of focusing device.

From the point of view of image quality, it is necessary to obtain raster lines of such a diameter that they lie beyond the resolution of the eye.

The subject matter of the invention.

Claims (2)

1. A device for stereoscopic television using interlaced scanning in two electron-beam television transmitters that alternate between odd and even frames for the left and right eyes, characterized in that the transmitted image is attached to one television screen, in front of which there is a wire mesh at the appropriate distance, shielding even lines for the left eye, and odd lines for the right eye, provided that the image is viewed from a proper distance. 2. In the device according to claim 1, the application of the vertical decomposition of the image on the lines. FIG. D6bek, I K istilitel T 2 -150n1g