SU1550461A1 - Apparatus for recording spacially separated sources of radiation - Google Patents

Abstract

The invention relates to optoelectronics and can be used to determine spatially separated radiation sources. The aim of the invention is to increase speed and reliability. The device is made in the form of an optical receiving element 2, photodetectors 4, forming a matrix, and an electronic processing unit 5. 1 hp f-ly, 2 ill.

Description

sp eaten

about

4 O5

1

The invention relates to optoelectronics and can be used for receiving luminous fluxes, in particular, laser communication systems with multi- and spatially separated objects with

The aim of the invention is to increase the speed and reliability of the device.

Fig. 1 shows the structural scheme of the device proposed in Fig. 2 — the principle electrical |: device,

1 The device comprises a disk 1 of Transparent material with a refractive Surface 2 forming an ellipse-ijif rotation. In the center of the disk, there is a Reflective surface 3 in the form of a co {recess, which is optically associated with photodetectors 4, which are combined into an electric matrix of ijn rows and n columns that are connected to the m + n inputs of block 5 - & processing.

The electronic processing unit 5 contains m + n comparators 69 m + n reference-voltage source 7, a decoder 8 and indicator 9, the first inputs of the comparators 6 are connected to the rows of the array of photodetectors 4 $ and the first time n inputs of the comparators 6 are connected Yen with columns of photodetector-Nikov matrix, second inputs of mtn comparators Connected to the corresponding m + n is

with reference voltage sources 7, you- The codes of all comparators 6 are connected to the corresponding inputs of the decoder. B, the outputs of which are connected to the grade-1x active inputs of the indicator 9, Moreover, the number N equal to mxn of photosensitive elements 4 in the matrix is chosen from the condition

 , - logj X С N Јm + n „

where K is the number of spatially separated radiation sources; С - number of combinations from N to

3-9

The device works as follows

In the initial state and the lack of information about the object in the light flux zide, the resistance of all photosensors 4 matrixes is large, the potentials of the rows and columns of the matrix are close to the supply voltage,.

five

0

five

Neither sources 7 supplied to the inverting inputs of the n comparators exceed the potentials of the matrix columns in the I initial state, and the reference voltages of the sources 7 supplied to the non-spinning inputs m of the comparators do not exceed the potentials of the matrix rows in the initial state. At the same time, the output level of all comparators is set to a low level (O). The output code at the output of the decoder 8 is also zero, which is displayed on the indicator 9,

In case the luminous flux from the radiation source falls on the refractive surface 2 of the disk 1 made of transparent material (glass, quartz, polystyrene, etc.) and reflected from the surface of the conical recess 3, is focused on the working surface of one, for example, the photodetector F ( At the same time, the potential of the first row of the matrix decreases to a level lower than the reference one, and the first column increases to a level larger than the reference one. This triggers the comparators 6 connected to the first row and the first column and at the outputs of the comparators Ator 6 is set to a code a (a, a, o.o, am + n, where, and in the remaining bits, zeros. This two-digit code is converted by decoder 8, for example, into a seven-segment one, which is displayed as visual information by indicator 9.

When a light flux from a source located in another direction appears and the light flux detected by the photodetector F disappears, the resistance of the photodetectors decreases, for example (FL) and the photodetector resistance increases, the potential of the i-th row decreases and the potential 1 increases. th column with simultaneous return to the initial potential level of the first row and the first column. At the outputs of the comparators 6, a corresponding two-digit code is established:. 1, and in the remaining bits the zeros4, which is converted by the decoder 8 and the indicator 9 into visual information corresponding to the direction of the recorded light flux,

In the case of the registration of various combinations of several objects simultaneously, the incoming amount of information on the photodetectors is determined

according to the Hartley formula,

 .

be equal to m +m + n (bit). About-

The starting capacity of a single channel with a comparator is 1 bit, and the entire multichannel processing circuit — tp + n bits. Therefore, if this inequality is observed, for all possible combinations of the objects to be recorded, non-repeating codes will appear at the outputs of the comparators by ensuring that the number is consistent information with bandwidth processing scheme.

Thus, the direction of the light flux is uniquely associated with the corresponding digital information on

indicator 9.

Claims (1)

1. The device for detecting spatially separated radiation sources, including an optical element in the form of a transparent disk, in the center of which there is a reflective surface in the form of a conical notch, a photodetector optically connected to the reflecting surface and an electronic processing unit, differ ten nd, 5 20 25 30 55046J, 6 This is so that, in order to increase speed and reliability, the photodetector is made as a set of discrete photosensitive elements combined into a matrix of hectares and n columns, which are connected to the m + n inputs of the electronic processing unit, and the number N, equal to mxn of the photosensitive elements, is chosen from the condition  . 1o b C .. "m + n, Uo where k is the number of spatially separated radiation sources; C is the number of combinations of N by i,, 1,2, .. ,, k. 2 "Device according to claim 1, characterized in that the electronic processing unit is made in the form of (w + n) channel parallel analog-digital converter containing a comparator and a source of reference voltage in each channel, the first inputs of the comparators being connected to the corresponding the inputs of the block, 7 and the second inputs of each of the comparators are connected to the respective sources of the reference voltage, and the outputs of the comparators are the outputs of the block. S {, f „  and v Ut x L . . I Jst j:% "" n