SU1499399A1 - Light beam scanning device - Google Patents

Abstract

The invention relates to information technology and can be used to convert and display information. The purpose of the invention is to simplify the device. The goal is achieved by the fact that a device containing a pulse generator 1, trigger 3, elements NON-AND 5.6, a first LED 8 and a matrix screen 11, each cell of which contains a second LED 22 connected in series and a photo thyristor 23, is inserted transformations, made in the form of optically coupled multichannel fiber-optic transformer 17, optical gates 18 and multiplexers 19. 2 Il.

Description

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The invention relates to information technology and can be used to convert and display information.

The purpose of the invention is to simplify the device.

Fig, 1 shows a structural diagram of the device; in fig. 2 - the matrix screen is functional (basic).

The device contains:; The generator 1 pulses, the output of which is connected to the installation input 2 of the trigger 3, the input 4 of which is connected to the first inputs of the first 5 and second 6 AND-NOT elements and is the installation input 7 of the device, the first LED 8, the anode of which is connected

13 ME 11. The anodes of all lights 22 are connected together and through a handsome resistor 24 from the bus

 the power supply ME 11, and the cathodes of the phototype 23, respectively, of the first and a swarm of groups are connected together and in with the first 14 and second 15 control buses of the ME 11.

fO The device works as follows.

at once.

In the initial state before the start of the screwdriver at the input 7 of the installation, in the state of

15 of the logical O, which is sent to the input 4 of the flip-flop setup, the zero state, to the first I-NE elements. 5, 6 and to the cathode of the diode 8. As a result,

with the power bus 9 via the limiter-20 output of the trigger 3, a present resistor 10, a matrix screen (ME) 11, having parallel optical inputs 12, and an output 13, the first 14 and the second 15 control buses, and the outputs of the AND-NOT elements 5 and 6 are connected to the first control bus 14 and the second bus 15 ME 11, the cathode of the LED 8 is connected to the installation input 7 of the device, the optical conversion unit 16 implemented in the form of an optically coupled multichannel fiber-optic transformer 17, optical gates 18 ,, 18 g and multiplexers 19 and 19, inputs and you Which are optically connected 5 respectively with parallel optical output 13 and input 12 of the ME 11, one of the inputs of the second multiplexer 19 g is optically connected with the LED 8, the control inputs 20 720 40 of one of the gates 18 are control inputs the device, the control input of the second gate 182 is the information modulating input of the device, and its optical output is its information parallel output of the device.

The ME 11 contains cells 21 arranged in two groups so that each cell 21 of one group is connected at the top, bottom, left and right with cells 21 belonging to the other group, and the cell 21 consists of a series-connected second LED 22 and photothyristor 23.55

The total cost of all the optical inputs of the photothyristors 23 and the optical outputs of the LEDs 22 is parallel optical input 12 and the output voltage of the logic O, and the voltage of the logic O because, at the first inputs of the AND-NE element 5 and 6, there is a voltage O, then on their exits. There is no logical voltage that goes to the cathodes of the photoristors 23 of all the cells 21 (Fig. keeps them locked). Through the LED 8, a current flows, it is in the excited band, its radiation enters through the multiplexer to the photothyristor 2 of the second cell (Fig. 2) and prepares the phototiri 23 of the first cell 21. is maintained until the logical voltage 1 is present on its cat. The appearance of a signal on which of the control inputs 20, -20 of the device is not affected by the influence of cells 21, since the photo-tori 23 are locked. ator 1 cos them vyrabatgoaet rectangular pulses which arrive at Rin Fitting 3 trigger, but not edited state until the inlet 4 Ac exists a zero voltage.

At the time the process begins, a voltage, logic 1, is applied to the input 7 of the installation, as a result of which the trig starts switching: under the pulse of the generator 1, the arrival at its counting input 2. The voltage 1 from input 7 enters the first inputs of the elements AND-NOT 5 and, as a result, rectangular impulses start to flow from

13 ME 11. The anodes of all the LEDs 22 are connected together and through the limiting resistor 24 to the bus 9

the power supply ME 11, and the cathodes of the photothyristors 23, respectively, of the first and second groups are connected together and are the first 14 and second 15 control buses ME 11.

The device works as follows.

In the initial state, prior to the start of the sweep, at the input 7 of the initial state there is a voltage of logic O, which is post-input to input 4 of the flip-flop 3 in the zero state, to the first inputs of the AND-NE elements. LED 8. As a result, on the right

trigger output 3 is present

the voltage of the logical O, .a on the inverse is the voltage of the logical 1, since the primary inputs of the AND-NE elements 5 and 6 contain the voltage of the logical O, then their outputs will have the voltage of the logical 1, which goes to the cathodes photothyristors 23 of all cells 21 (Fig. 2) and keeps them in a locked state A current flows through the LED 8, and it is in an excited state, its radiation is transmitted through the first multiplexer to the photothyristor 23 of the first cell (Fig. 2) and prepares it for opening The photothyristor 23 of the first cell 21 remains closed until a logical voltage 1 is present on its cathode. The appearance of a signal on any of the control inputs 20, -20 of the device does not affect the state of the cells 21, since photo thyristors 23 are locked. The pulse generator 1 generates square-wave pulses that arrive at the input 2 of the setup of the trigger 3, but do not change the state, while the input 4 has a zero voltage.

At the moment when the sweep process starts, the voltage of logical 1 arrives at the input 7 of the installation, as a result of which the trigger 3 starts switching: under the action of the pulses of the generator 1 arriving at its counting input 2. The voltage of the logical 1 from input 7 enters the first inputs of the elements AND-HE 5 and 6, as a result of which the passage of rectangular pulses from the outputs begins

the trigger 3 to the outputs of these elements, from where they arrive at the electrical inputs 14 and 15 of the MU 11. Thus, at the inputs 14 and 15 of the MEC 11 there are antiphase sequences of identical square pulses, the duration of which is equal to the pulse period of the generator 1, and the duty cycle equals one. When a voltage of logic 1 arrives at input 7, LED 8 goes out, but due to the fact that the photo thyristor 23 of the first cell 21 is previously prepared for the radiation to open LED 8 and in the first cycle, the first bus 14, to which the cathode of the photo-torus 23 is connected, enters zero The photo thyristor 23 is turned off and remains open until the end of this cycle.

The sweep process can be performed from any cell 21 of the ME 11, not necessarily from the first. To do this, it is necessary to move the triggering LED 8 in such a direction, from where it would light into the desired cell 21 ME 1

Cell 21 of ME 11 (FIG. 2) is excited in the case when a logical O is present at the cathode of the photo thyristor 23 and an optical signal is present at the photo thyristor 23 itself. Then from the bus 9 through the resistor 24, the LED 22 and the photo-thyristor 23 will flow current to one of the electrical inputs 14, 15 ME 11, depending on where the logical O and optical signal are present.

If it is necessary to perform the sweep process line by line right, then a corresponding signal is sent to the fourth device control input 204, which makes the first gate 181 transparent so that an optical image passes through it, which in the second multiplexer 19 of the optical conversion unit 16 is reflected to its output and goes to parallel input 12 ME 11. The image enters through a multichannel fiber-optic transformer 17, the first multiplexer 19 from the parallel optical output 13 ME 11, and stroke image supplied from the output 13 of the ME 11, but shifted by one cell 21 to the right.

This is achieved with a fiber optic transformer 17,

which shifts the corresponding original image by the size of one cell to the right, and the shifted image is fed through the first gate 18, and the second multiplexer 19 to the parallel input 12 ME 11. If the determined cell was in the excited state 21, then the next bar will excite the cell 21 on the right due to the fact that on the second bus 15 ME 11 there is a logical O on, and on the photo thyristor 23 of the right cell 21 there is an optical signal,

coming from the LED 22 of the left cell 21 through the block 16 optical conversion.

If it is necessary to perform the process of sweeping the beam to the left, then a signal is sent to the third bus 20 3 control device, which makes the first signal. the left gate 18 is transparent so that through the second multiplexer 192 the image will be fed to the input 12

ME 11, already shifted one bit to the left. In the next cycle, the left cell 21 will be excited, and the excited cell will be zeroed. This is achieved by converting the signal by an optical conversion unit 16 by shifting one of the fibers of the optical fiber transformer 17.

If it is necessary to move the light beam up or down, then the corresponding signals are fed to the second 20 or first 20 control buses of the device, as in the previous modes.

Thus, with the subsequent tact, only the neighboring cell, located to the right, left, above, and below from the excited one, can go into the excited state, depending on the given control law on

control yins.

Thanks to block 16, optical path conversions can be made arbitrary. The presence of a second optical shutter 18 with its control bus allows a discontinuous sweep trajectory to be obtained.

Thus, the output aperture of the beam is the output of the second optical shutter 18.

A discontinuous path is reached

The fact that the control signal of the second gate 18g is given a signal by the duration of the rupture of the trajectory, i.e. on

this time the shutter becomes opaque.

Depending on the light-emitting diodes used, both coherent and incoherent radiation can be obtained. In the case of using conventional LEDs, incoherent radiation is obtained, and in the case of using semiconductor lasers (laser diodes, coherent.

Claims (1)

Claims An apparatus for scanning a light beam comprising a pulse generator, the output of which is connected to a trigger setup input, the reset input of which is connected to the first inputs of the NAND elements and is a setup Hbw device input, the first LED whose anode is connected with a power bus, a matrix screen, the cell of which contains a second LED connected in series 50 and the photothyristor, the outputs of the elements AND-NOT are connected to the cathodes of the photothyristors of the first and second groups, respectively, of the matrix screen, the cathode of the first LED is connected to the installation input of the device, characterized in that, to simplify the device, an optical conversion unit is inserted into it, made in a vvde optically coupled multichannel fiber optic transformer, optical gates and multiplexers, the inputs and outputs of which are optically coupled to the second LEDs and photo thyristors, respectively eek matrix screen, one of the inputs of the second multiplexer optically coupled to the first LED councils l-r inputs of one of the optical shutters are data inputs of the device, and the output of the other optical shutter is a data output device.