SU967207A1 - Holography storage - Google Patents

Abstract

A HOLOGRAPHIC OPERATING MEMORY DEVICE containing a radiation source whose optical output through a beam addressing unit is connected to the input of the first beam forming unit, a second block of beam opening front ends, whose output through sequentially positioned control transparency, a randomization unit and the first focus beam unit, with the input of the controlled multiplier unit, at each optical output of which a third beamforming unit is installed, optically connected to the information carrier, in Two focusing blocks by the number of optical outputs of the controlled multiplicative block, the output of each of which through the optical linkage unit and the projection block is associated with the corresponding input of the information processing unit, the control unit, the outputs of which are connected to the radiation source, beam addressing unit, controlled by the tra : a controllable multiplier for a controlled unit, information carriers, an information processing unit, characterized in that, in order to increase the reliability of the device, controlled beam beams are inserted into it fourth, beam forming unit, reference beam forming unit, beam converting unit, polarization switch, fifth beam forming units by the number of optical codes of the controlled multiplier block, reference beam blocking blocks by the number of the optical outputs of the controlled multiplier unit, the driver of the controlled multiplier signals, wherein the output of the first beamforming unit is connected to the input of the controlled beam splitter, the first optical output of which is through the fourth. the beamforming unit is optically connected to the first input of the beam converting unit, the second optical signal of the controlled beam splitter is connected to the second input of the beam converting unit through the second beam forming unit and the polarization switch of the optically connected polarizer through the second beam forming unit is connected with the first beam focusing unit, the optical output of each information carrier is connected to the input through the corresponding fifth beam forming unit and the blocking beam of the reference beam vukschego second block beam focusing vyhd control unit via a control signal generator connected to the control beamsplitter.

Description

The present invention relates to the field of computer technology and can be used in systems for the operational processing of large amounts of information.

A holographic random access memory (GOZU) lj containing a radiation source is known (5k beam addressing, image multiplicator, optical systems, data carriers, controllable transparency, hololin matrices, photodetector units. The main drawbacks of this device are low its reliability, associated with the presence of a large number (equal to the multiplication factor) of controllable transparencies of photodetector blocks and hololines matrices, as well as its relatively small information bone.

The closest technical solution is a multichannel associative addressable optical memory device f containing a radiation source whose optical output through a beam addressing unit is connected to the input of the first beamforming unit, a second beamforming unit which output through sequentially positioned controlled transparency, the unit randomization and the first beam focusing unit are associated with the optical input of the controlled multiplier unit, each optical output of which is via the third unit the beam formation is associated with the optical input of the information carrier, the second beam focusing units by the number of optical outputs of the multiplier unit, the output of each of which through the corresponding optical communication unit and the projection unit are connected with the corresponding optical input of the information processing unit, and the control unit whose outputs are connected to a radiation source, a beam addressing unit, a controlled transparency, a controlled multiplier unit, to each information carrier, an information processing unit. The main disadvantage of this device is its relatively low reliability associated with a point method of storing information.

The purpose of the invention is to increase the reliability of the device by storing information on holograms.

The goal is achieved by introducing a controlled beam splitter, a quarter beamforming unit, a reference beamforming unit, a convergence unit, a polarization switch unit, and fifth beamforming units according to the number of optically outputs of the controlled multiplicating unit, blocking units into the holographic operational memorization device. the reference beam according to the number of optical outputs of the multiplicative unit, the driver of control signals, the output of the first beamforming unit connected to the optical input of the control the splitter, the first optical output of which through the fourth beamforming unit is connected to the first input of the beam converting unit, the second optical output of the controlled beam splitter through the reference beamforming unit of the beam converting secondary output of the beamforming unit , the polarization switch unit and the first beam focusing unit are connected with the optical input of the controlled multiplier unit, the optical output of each information carrier is black ty of the corresponding n beam forming unit and locking unit of the reference beam associated with a respective input of the second beam focusing unit, the control unit output from the generator control signals nmtsih connected to the controlled beamsplitter.

The drawing shows the block diagram of the proposed device.

The holographic random access memory includes radiation source 1, beam addressing unit 2, beam forming unit 3, controlled beam splitter 4, beam forming unit 5, reference beam forming unit 6, convergence beam unit 7, beam forming unit 8, control transparency (UT) 9, unit of polarization switch 10, unit of randomization 11, first unit of focusing rays 12, control multiplier unit (UMB) 13, units of beam formation

14, information carriers. 15, beamforming units 16, locking blocks of the reference beam 17, second beam focusing units 18, optical communication units 19, projection blocks 20, inAormation processing unit (BOI) 21, control unit (CU) 22 ,. driver control signals (FUS) 23.

. Radiation sources 1 can be, for example, lasers, and electrical de-energizers (for example) can be used as a unit for addressing beam 2.

The beamforming unit 3 can be made, for example, in the form of a lens.

The controlled beam splitter 4 either splits the light beam into signal and reference, or directs the entire light beam only to the channel of the reference beam. Unit 4 may consist of a t1c, for example, of a polarized beam-splitting cube, which transmits or reflects light beams depending on the orientation of the plane of polarization of light, in front of the input plane of which there is a polarization switch. A polarization switch, when a voltage is applied to it, can rotate the polarization plane of the transmitted light or 90, or create an elliptical polarization.

The beamforming unit 5 provides illumination of the controlled transparency 9 from different angles. The elok 5 can be implemented, for example, on the basis of lens-raster optics or a light beam splitter, for example, on the basis of birefringent or holographic elements, which split the beam into a plurality of beams, the number of which is equal to the total number of working cells of the controlled transparency 9.

The reference beam forming unit 6 aligns the reference and signal beams across the entire surface of each information carrier 15. Block 6 guides all the reference beams through block 7 to block 8 at different angles so that they pass through the same entrance pupil of the switch box 10. Block 6 can be made, for example, on the basis of lenses and turning elements.

The beam convergence unit 7 directs the signal and reference beams to the beamforming unit 8. Block 7 may be implemented, for example, in the form of a beam-splitting polarized cube, and unit 8 in the form of a lens.

Control transparency 9 performs space-time modulation of the transmitted light beams in accordance with the code intended for recording information.

The unit of polarization switch 10 orients the plane of polarization of the reference beam parallel to the signal one. It can be made, for example, on the basis of electro-optical or liquid crystal elements.

The randomization block 11 ensures a uniform distribution of light across the hologram field. Unit 11 can be performed, for example, on the basis of liquid crystals.

The first beam focusing unit 12 performs the Fourier transform of the input information page (UT-9) and can be performed in the form of a lens.

The controlled multiplicative unit 13 performs, for example., The direction of the image of UT-9 to any storage medium 15 and can be constructed on the basis of controlled semi-cube systems 2j.

Each beamforming unit 14 provides the direction of the signal beam normal to the respective carrier 15 and can be performed, for example, in the form of a lens.

Each carrier-information 15 is made, for example, on the basis of magneto-optical materials or any suitable medium that permits optical on-line recording, matching and erasing holograms.

The beamforming units 16 are designed to align the reading of the beams on the respective units 17. The unit 16 may consist, for example, of two lenses that are mutually in each other's focal planes.

Each focusing unit of the beam 18 is made, for example, in the form of a lens.

Each optical communication unit 19 is multiplexed, for example, in the form of an optical fiber array. The projection units 20 are made, for example, in the form of collective lenses. Block 21 performs processing of a formation read from any hologram. The control unit 22 controls various information processing modes. Tolographic random access memory works as follows. In recording mode, the radiation source 1 directs the light beam to the beam addressing unit 2, which is co. Mandu BUG22 sets it to the position corresponding to the address of the area on the corresponding storage medium 15, on which the hologram should be recorded. The light beam coming out of beam addressing unit 2 is formed by unit 3 and fed to controlled beam splitter 4. Controlled beam splitter 4 splits the light beam into signal and reference ... The signal beam is formed by beam forming unit 5 and illuminates through blocks 7 and 8 controllable banner 9. On UT-9 the code of the recorded information is displayed, arriving at the command BU-22 from any external source of information (for example, memory of any type, processor, etc.). At the command of BU-22 block 11 generates randomization code for the code displayed on UT-9 moiety random phase mask. The reference beam, having passed the block of formation of the reference beam 6, through the blocks 7 and 8 enters the block of polarization switch 10. The block 10 rotates the plane of polarization of the reference beam, for example, 90, mouth. it is poured parallel to the plane of polarization of the signal beam. I The signal and reference beams simultaneously through the first beam focusing unit 12 are fed to the input of the controlled multiplier unit 13. At the command of the CU-22, the address code of the corresponding carrier 15 is fed to the UMB-13, to which information must be recorded. This code opens the corresponding channel in UMB-13, through which the signal and support come from the UMB-13 input to the selected output. Through the corresponding fourth beam-forming unit, the signal and reference beams illuminate the area of the selected information carrier 15 corresponding to the address specified by the beam addressing unit 2. The interference pattern of the signal and reference beams is a Fourier hologram of the image of the code displayed on the UT-9. A selected recording medium 15, for example, is given a signal permitting recording to the selected storage medium 15. At the end of the hologram recording, the signal enabling the recording is removed. In the read mode, the beam addressing unit 2, at the command of BU-22, sets the light beam to the position corresponding to the hologram address on the selected carrier 15, from which information CI should be read. The controlled beam splitter 4, at the command of the BU-22, directs the entire light beam only to the channel of the reference beam. The reading beam passes the optical system of the reference channel and illuminates the pictorial hologram on the information carrier, the address of which is determined by the code supplied from the BU-22 to the UMB-13. The image restored from the hologram enters through blocks 16-20 to the output block, where it is processed by known circuits. A reading beam passing through a hologram without diffraction, by each fifth beam forming unit 16, is projected onto the corresponding blocking block of the reading beam 17, is blocked by it and does not interfere with the processing of the image recovered from the hologram. In the hologram erase mode, the control beam splitter 4 directs the erase beam only to the reference beam channel, and the information carrier 15, using a command VU-22, for example, sends a signal enabling erasure. When the hologram is erased, a signal allowing erasure, for example, is removed. The use of the proposed device in computing technology will allow the processing of information on the array 10. Zn., And more than 100 times increase the reliability of storage devices. 7 The creation of an electronic analogue of such a memory is not possible because of the complexity, technical difficulties and too high a cost.

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Claims (1)

A holographic operational memory device containing a radiation source, the optical output of which through the beam addressing unit is connected to the input of the first beam forming unit, a second beam forming unit, the output of which through sequentially arranged controlled transparency, a randomization unit and the first beam focusing unit is optically connected to the input of the controlled multiplying a block, at each optical output of which a third beam forming unit is installed, optically coupled to the information carrier, second focusing units according to the number of optical outputs of the controlled multiplying unit, the output of each of which through the optical communication unit and the projection unit is connected to the corresponding input of the information processing unit, the control unit whose outputs are connected to the radiation source, the beam addressing unit, the controlled transparency controlled by the multiplying unit, information carriers, information processing unit, characterized in that, in order to increase the reliability of the device, a controllable beam splitter is introduced into it, a quarter the fifth beam forming unit, the reference beam forming unit, the beam converting unit, the polarization switch, the fifth forming units. the beam by the number of optical outputs of the controlled multiplying unit, the blocking blocks of the reference beam by the number of optical outputs of the controlled multiplying unit, the driver of control signals, the output of the first the beam forming unit is connected to the input of a controlled beam splitter, the first optical output of which is through the fourth. The beam forming unit is optically connected to the first input beam convergence beam, the second optical output of the controlled light-emitting diode through the reference beam forming unit is connected to the second input of the beam converting unit, whose output is optically coupled to the first beam focusing unit in series with the second beam forming unit and the polarization switch, the optical output of each information carrier through the corresponding fifth beam forming unit and the block of the reference beam block connected to the input of the corresponding second beam focusing unit, the output of the control unit h Through the driver of the control signals is connected to the control beam splitter.