SU473320A1 - Vacuum-free television transmitting device - Google Patents

Description

one

The invention relates to radio engineering, can be used in systems for accumulating and reproducing optical images used in low-frame television and phototelegraphy, as well as in systems for rewriting and reproducing an image with a delay of a predetermined time.

A non-vacuum transmitting television device with photoelectrostatic image recording on a moving medium containing a tape drive mechanism, grounded rollers, electrification and recording unit, intermediate storage unit for the carrier, bias current reading unit, video amplifier, synchronization unit, pulse generator, erase unit is known. control unit.

The purpose of the invention, the improvement of resolution, is achieved by the fact that in the device proposed a reading unit is installed in the form of a figured mirror with a groove into which a metal scanning disk with a dielectric ring is inserted, mechanically connected by means of a metal and dielectric couplings to an electric motor containing axially placed in through radial insulated reading metal channels connected by electrical ends to the dielectric layer of the storage device and through brush current emnik - with advanced video amplifier, and a block erase made of crimping drive grounded conductive rollers, one of which is bonded via

sliding electrical contact with the base of the accumulator, and the other with the dielectric layer, and at the end of one of the rollers an insulating film is applied on which a roller is attached, connected through a brush current collector to a potential output of the high-frequency oscillator.

FIG. 1 shows a general view of the proposed device; in fig. 2 - drive; in fig. 3 - electrification and recording unit; on

FIG. 4 - reading unit; in fig. 5 - block

reading, top view; in fig. 6 - block

readout, longitudinal section; in fig. 7 -

General view of the erase unit.

Vacuum-free television transmission

The device contains a drive 1, a tape mechanism 2, grounded rollers 3, an electrifying and recording unit 4, a reading unit 5, an intermediate storage unit 6, a video amplifier 7, a synchronization unit 8, an electric motor 9, a pulsed power supply unit 10, an erase unit 11, a device automation 12, control unit 13 and power supply device 14. Photoelectrostatic tape drive 1 contains a light-transparent flexible Kvso dielectric base (lavsan, styrene, etc.) 15, conductive layer translucent (Sn02, gold, etc.) 6, high sensitivity layer 17, the resistivity, dielectric; layer (polyester, styrene, polyethylene, etc.) 18.

The electrification and recording unit contains a leakage storage device I,,; a bridge, a control grid 19, a corona driver (electrodes) 20, a screening electrode 21, an emulsion generator (high voltage pulses 6-30 KB) 22, an impulse generator (high voltage pulses 500-3000 c) 23, an expander unit 24, an extinguishing resistance 25 in a discharge electrode of the corona, an extinguishing resistance 26 in value of the shielding electrodes, a cornering 27 in the value of a grid.

The readout unit includes a disposable storage device 1, a pressure figured mirror 28, a read metal 29, a skip disk 30, a groove 31 in a figure mirror, rotating rollers 32, a current collecting brush 33, a rotating sleeve 34 of buried conductive material to which the metal wire is attached, rotating dielectric coupling 35, shielding case 33, a preliminary video amplifier 37, video signal output 38 into a video channel unit and si block; chroization, metal coupling 39, electric motor 9 with a shaft 40, shielding housing 41 electric motor bodies kreilenie motor 42, the brush 43 zaze.mleni dzigatel axis. dielectric colio 44, dielectric stocking of metal fibers 45, with anti-slip load 46 and at the entrance of the preliminary video interlacing.

The terrain erase unit contains grounded conductive rollers 47, conductive roller 48, insulating pad 49, brush current collector 50, edge 51 of a translucent conductive storage layer, and high frequency oscillator 52.

Static state of the device.

The photoelectrostatic drug storage device I must be dislocated by a radiation mechanism 2 (Fig. 1) both uniformly and with a clip equal to the size of the frame recorded by the source.

A jump (schagovy) movement of the dollar occurs during recording, and a uniform one — during the reading.

As a device, zaiis can use kiiofotoanparat or a special camera. The electrification device includes a diode or triode discharge corona and a high voltage power supply unit with a voltage of respectively 6-20 kB and 600-2000 B.

A triode electri- cator can be a large number of parallels, a nat X path and a distance: 1 distance, wires or a fine mesh, located at a distance of 0.1-2 mm from the dielectric; For more effect; Shielding electrodes are located between the corona wires and the uniform electrification of the accumulator surface.

The corona surface of the plate should be located 10-30 mm from the fine mesh.

The magnitudes of the imimuli potentials applied to the corona-forming area and the fine-structured grid (6–20 kV and 600–2000 c), in the general case, depend on the thickness

and the specific alignment of the layers of the tip, the required magnitude of the corona current and the time of electrification, the races of the dielectric layer of the charge from the fine-structure mesh and the electrodes of the metal fiber plate.

The nromel unit of the storage media is a camera with a cooling device up to 15-0 ° C, in which the tape drive should be stored in the form of material

or roll.

The readout unit includes a scanning disk with a diameter of 10-100 mm, rotating with a speed of orbit 5000-18000 rpm, inside which iodine angle of 120 °

each other are located reading the isolated metal fibers with a diameter of 1-20 microns.

The disc, when readable approximately на 3 times the length of its perimeter, enters groove 31

figure mirror, which with the help of a special air clamp stabilizes the air gap of 1-20 microns between the surface of the moving tape accumulator and the ends of the rotating metal fibers. The second current collector electrode and the readout are rotating rollers 32 sliding along the conductive edge of the accumulator.

The erasing unit 11 can be made in the form of two conductive rollers (one of them

rotates), between which a lightning roll is rolled. In one version of erasure, the rollers should be grounded, in the other, a strong high-frequency signal is applied to them.

Line and frame synchronization can be implemented by two different methods:

1) From the outer side of the tape and opposite the edge of the transparent shielding electrode

It is possible to install a photodiode or photo-illumination strictly in the plane of rotation of the disk. At the end of the dielectric ring of the disk, install a miiiature lamp or other light source with a narrow light slot.

If there are three reading metal fibers, in the case of an example, three light bulbs are needed, but one can be limited to one, creating a time delay in order to obtain a pulse for the second metal fiber,

third and so on

When the dike is moving, the light of the glowing lamp passes through a narrow slit to the edge of the transparent and conducting electrode of the accumulator and, passing through its transparent optical conductor layer and the transparent dielectric base, illuminates the light sync pulse sensor (photodiode, photoresistance) in an electrical circuit with a pulse illumination. current.

Consequently, with one revolution of the disk and three reading metal fibers fixed on it (corresponding to p-10 and three sources of illumination), three sync pulses will be issued. The backlight source fastened at the end of the dielectric disk ring is slightly ahead with respect to the corresponding reading metal fiber, therefore, to coincide the start of the sync pulse with the beginning of reading the corresponding metal fiber of this line, you must install an elementary delay line.

2) Since in the photoelectrostatic recording method the ratio of the thickness of the two-layer storage structure is chosen from 1: 1 to 10: 1, there is always a constant potential level on the storage dielectric layer after the image is recorded - the apparent background of the image, which in the absence of exposure is essentially level "black. In the recorded image. If the diameter of the scanning disk or the width of the accumulator is chosen such that after the end of reading one line and the output of this reading metal fiber beyond the surface of the storage device, the second reading metal fiber enters the cavity of the figured mirror with a slight delay, a pulse appears in the video signal, the top of which corresponds to the "zero level" background (no background), and the back front corresponds to the beginning of reading a new line.

This signal after amplification of a signal in a preliminary video amplifier can be selected by limiting and used as a horizontal sync pulse, and with proper conversion it can be used as a sync sync pulse and other control signals. iltpulsov in the transmitting and receiving parts of the video path.

The device autogate 11 12 and the control unit 13 provide the necessary mode of operation of the transmitting device.

The cycle of operation of a vacuum-free transmission device with electrostatic reading can be divided into five processes:

a) electrification (preparation) of the accumulator.

b) recording of the image (accumulation of video information),

c) the formation and storage of potential relief (preservation of the image),

d) reading

e) erasing the image (neutralizing residual relief after reading).

To electrify, a section of tape equal to the frame size of the recorded image is pulled under the projection window.

Using automation devices 12 and a control unit 13, high voltage pulses appear at the output of the pulse power supply unit 10, which are applied to the electrodes of the metal fiber faceplate and fine-grain grid.

The purpose of electrification is to conduct the free surface of the paco 1ptel frame using a corona discharge to the equilibrium potential of the electrosight in the OTCVT effect of illumination.

As a result, electrification, depending on the electrophysical properties of the PG. the voltage on the layers is distributed according to the "relief relief or" relief of the containers.

About 10 seconds after the start of electrification, a recordable image frame is projected onto the layer 17 of a highly sensitive resistance storage device with the help of the exposure device 24.

In the note: (about 10 seconds), the free surface of the section of the accumulator onto which the image is projected is maintained under the equilibrium potential, and the operation mode of the electrifier may not change.

The electroplating exposure ends either at the same time or with a given time shift.

As a result of exposure, due to the redistribution of stresses between the recording layer 17 and the dielectric layer 18, a potential relief is created at the boundary of the ηth layers.

After the end of the exposure due to the breaking of the charging circuit of the storage ring and the discharge of the photoflow, the potential relief gradually passes to the free surface of the storage ring and lasts a long time.

The exposed frame is pulled back and the next frame is recorded. The storage device with the recorded image is stored in block 6 as a roll or loop.

After recording the balance of the torso cpsl

T: O after a predetermined storage time has expired, the recorded video for: 1Ac is read.

When reading, the tape drive 1 moves evenly inside the figured pressure mirror 28. Line reading

the images are performed element by element by the ends of the conductive telescopic 29. stacked inside the metal disk 30. which is driven by the electric motor 9. When the metallic fiber passes in close proximity to the surface of the read line of the dielectric layer of the pit, at any given moment through the rollers 32. Along the end of the translucent conductive layer of the accumulator 1, the reading unit, the elementary air gap. hetall fiber. current collector brush 33 and the load resistance set at the input of the preliminary video amplifier, flows a bias current proportional to the potential of the read element.

When a metal fiber scans a given line through the load resistance, a bias current is proportional at each given moment to the potential of the individual elements of the read line, which forms a video signal on the load resistance. Frame readings occur as a result of a uniform movement of the drive at a rate inversely proportional to the time of reading the line and, accordingly, the frame.

In order to equilibrate and prepare the storage device for recording and transferring new image frames, the storage device passes through an erase unit.

If the plates of the rollers of the erase unit are grounded, the drive is discharged as an ordinary capacitor when its plates are short-circuited. If a strong high-frequency field is applied to the rollers, the drive is discharged in the alternating current field.

When the erasing is completed, the tape drive is ready to record new image frames, and the entire operation cycle of the device is repeated.

Subject invention

a vacuum-free transmission television device with a photoelectrostatic image recording on a moving medium containing a tape drive mechanism, grounded rollers, an electrification and recording unit, a medium intermediate storage unit, a bias current reading unit, a video amplifier, a sync unit, a pulse generator, an erase unit, A control unit, characterized in that, in order to increase the resolution, a reading unit is installed in it in the form of a figured mirror with a groove in which introduced a metal scanning disk with a dielectric ring, mechanically connected by means of a metal and dielectric couplings to an electric motor, containing insulated read-out metal fibers placed axially in the through radial channels, connected by electrical ends to the dielectric layer of the accumulator and through a brush current collector with a preliminary video amplifier, and an erasing unit, made of a grounded conductive rollers, which one of them is connected by means of slides its electrical contact with the base of the accumulator, and the other with the dielectric layer, with an insulating strip on the end of one of the rollers, on which a roller is attached, connected through a brush current collector to a potential output of a high-frequency oscillator.

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FIG. 2

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