SU822161A1 - Device for associative retrieval of information - Google Patents

Description

electronic equipment for its operation.

This goal is achieved in that the device for associative information retrieval contains an optical inverter, a coding unit and a projection unit, the input of which is optically connected to the output of the coding unit, and the output - with a photodetector unit, and the optical input of the optical inverter of the optical associative memory unit and the output is with the input of the coding unit, and the first and second control inputs of the optical inverter are connected to the corresponding outputs of the control unit, as well as the fact that there is an optical inverter in it it from a radiation source, a light-connecting element made, for example, in the form of a beam-splitting cube and a reversible photosensitive plate, one of the inputs of the light-connecting element being optically connected to the radiation source, and the output to a reversing photosensitive plate, and what is in it the coding unit is made in the form of a projection unit installed on one optical axis, the first lens raster unit, the coding plate and the second lens raster unit, or by the fact that the coding unit is made e plate optically associated with a diffraction grating

and plates with a hologram matrix.

FIG. 1 shows a block diagram of the proposed device for associative information retrieval; in fig. 2 is a diagram of optical associative memory blocks; in fig. 3 is a diagram of an optical inverter; Fig. 4 is an encoding block; in fig. 5 - holographic coding unit.

The device circuit comprises an optical associative memory block 1, an optical inverter 2, a coding unit 3, a projection unit 4, a unit of photodetectors 5, and a control unit b.

The optical output of block 1 is the display plane of the output focal plane of the output lens of the raster information cassette (not shown) or the plane of arrangement of the holograms, which usually contains a block of photodetectors to determine the address of the associative - detected information page.

The optical associative memory unit 1 (Fig. 2) consists of a radiation source 7, a beam addressing unit 8 with an optical system 9, providing both arbitrary predetermined addressing of light beams during reading and erasing, and simultaneous flashing of the entire address raster of light beams by associative processing information, a beam forming unit 10, a guided transparency 11, a beam focusing unit 12 of a raster information cassette 13, an optical readout unit 14, a beam focusing unit 15, a control unit 16.

The optical inverter 2 (FIG. 3), which produces an optical signal at the output in the absence of a signal at the input from unit 1 (if there is a signal at the input of the optical inverter, no output signal), consists of a radiation source 17 that creates a raster of the reference light beams of the light combining an element 18 combining on a reversible photosensitive plate 19 Rasters of light beams coming from the radiation source 17 and block 1. The reverse light-sensitive plate 19 passes the output signal from the radiation source 17 to the output only in those places where there is no signal from block 1.

The coding unit 3 (FIG. 4) consists of the projection unit 20, the first lens unit 21 of the lenticular screen, which -. the dosing plate 22 and the second node 23 of the lenticular screen. On the encoding plate 22 under the corresponding raster lenses are stored the address codes of the corresponding pages of the raster information cassette 13 of block 1.

5 The coding unit 3 can also be made (FIG. 5) in the form of a diffraction grating 24 and a plate with a hologram matrix 25 with the address codes of the respective pages.

0 block 1.

The photodetector unit 5 is designed to read the address codes stored in the encoding unit 3. As a block of photo detectors

5, for example, a photodetector array containing 10-50 elements may be used for associative search through an array of information pages.

0 Control block 6 provides. the operation of unit 1 in the mode of associative information retrieval.

The device for associative information retrieval works as follows.

At the command of the control unit 6, the optical associative memory unit 1 is transferred to work in the associative mode of searching information pages. In this mode, the source

About 7 radiation works at the wavelength of the read, while the block 16 highlights the entire address light raster. output beams of block 8 (for example, on all cells of the electro-optical system

5, quarter-wave voltages are applied). In the cells of the controllable transparency 11 intended for the associative feature of the page (microframe), block 16 displays, for example, the return code of the interrogation attribute, the rest. managed transparency cells are masked. The light beams with the help of the beamforming unit 10 are expanded to the size of the controllable transparency 11 and modulated by it. Since all address positions of block 8 are highlighted, the code of the question mark is projected using block 12 onto all associative features of all micro-frames recorded on a plate with reversible medium 13. Produce .dits. optical multiplication of the image of a poll tag on all associative attributes of pages.

The light distribution from the plane of the plate with the information carrier using the optical readout unit 14 and the beam focusing unit 15 is projected onto the output of unit 1 as a raster of light points.

If one of the associative features coincided with a poll sign, then the corresponding point in the raster is absent. The address of this missing light point in the raster corresponds to the ISKED address of the microframe on the carrier of block 1,

This raster of light points from the output of block 1, at the command of the control block b, is fed to the input of the optical inverter 2. At the command of the block b, a reversing light beam from the source and, for example, is fed to the reversible photosensitive plate 19 of the optical inverter 2. so that this growth coincides with the raster of light beams from block 1 on the reversible photosensitive plate 19. Light beams from block 1 are prohibition signals for reference light beams, therefore when applying, for example, , from the block 6 of the signal to the plate 19, which allows inverting, the output of this plate, and Consequently, the optical inverter 2, appears the light signal only in the place where there was no corresponding input signal from the block 1. The coordinates of the output signal of the optical inverter 2 correspond to the desired address of the micro-frame in the raster information cassette or hologram on the carrier in block 1. This light signal is supplied to the coding block 3 by means of an optical system consisting of nodes 20 and 21 (Fig. 4), or by using a diffraction grating 24 (FIG. 5), highlights the corresponding frame on the encoding plate 22 (FIG. 4), or the hologram on the plate with the hologram matrix 25 (FIG. 5), which stores the address code of the desired raster microframe an informational cassette or hologram of the carrier of block 1. This address is projected onto the unit 5 of photodetectors with the help of the lens raster assembly 5 23 and the projection block 4 and is read by the command of block b

due to the fact that the address of the IP (Coma information is determined not by the coordinates of the photosensitive element in the 5 photodetector block, but by the address displayed from the coding block 3 and designed from any frame on the same photodetector block, The number of photosensitive elements in the unit 5 photodetectors can be significantly reduced.

The use of this device for associative information retrieval significantly simplifies the photodetector blocks by reducing the number of photosensitive elements in times and simplifies the electronic sampling circuitry.

Claims (4)

Invention Formula 1- A device for associating information retrieval, containing an optical associative memory unit, a photodetector unit, connected to the inputs of the control unit, one from the control outputs of which is connected to the corresponding inputs of the block of associative memory, which is so that, in order to simplify the device, it contains an optical inverter, the block coding and projection unit, the input of which is optically connected with the output of the coding unit, and the output - with the unit of photodetectors, and the input of the optical inverter optically coupled to the optical associative memory unit, the output to the input of the coding unit, and the first and second control inputs of the optical inverter are connected  corresponding to the outputs of the control unit. 2. The device according to claim 1, characterized in that in it the optical inverter consists of a radiation source, a light-joining element made, for example, in a beam-splitting cube and a reversible light-sensitive plate, one of the inputs of the light joining element optically coupled to the radiation source, and the output to a reversible photosensitive plate. 3. The device according to paragraphs. 1 and 2 are different because in it the coding block is made  the form of a projection unit installed on one optical axis, a first lens raster node, a coding plate, and a second lens raster node. 4. The device according to PP. 1 and 2, distinguished by the fact that in it the coding unit is made in the form of optically coupled plates with a diffraction grating of a plate with a hologram matrix. Sources of information taken into account in the examination 1.iSakaguchi M., Nishida N .. Nemoto T. And new assoclativ memory system utI I I g Ing holography. Eeee Trans. Des., C-19, 12, p. 11741181, 1970. 2. USSR author's certificate on application 2553910, cl. G 11 C 11/42, 1977. / fig.Z 23 / FagL