CN109119099B

CN109119099B - Image type parallel read-write optical information digital storage method

Info

Publication number: CN109119099B
Application number: CN201810735808.2A
Authority: CN
Inventors: 魏劲松; 王正伟; 王阳; 魏涛; 张奎
Original assignee: Shanghai Institute of Optics and Fine Mechanics of CAS
Current assignee: Shanghai Institute of Optics and Fine Mechanics of CAS
Priority date: 2018-07-06
Filing date: 2018-07-06
Publication date: 2021-01-01
Anticipated expiration: 2038-07-06
Also published as: CN109119099A

Abstract

An optical information digital storage method based on image type parallel read-write is characterized in that based on the optical information digital storage principle of image type parallel read-write, a data file is converted into binary images distributed by '0' and '1' through an encoder, and a DMD digital micromirror reflector and a motion platform are combined to be quickly exposed and spliced on a phase change material, so that data recording is realized; and combining an optical microscopic imaging technology, accurately restoring the data file through picture processing analysis and a decoder in sequence, and realizing data reading. The invention is simple and practical, and can realize fast read-write operation in the field of large data optical disk storage.

Description

Image type parallel read-write optical information digital storage method

Technical Field

The invention relates to the technical field of big data storage, in particular to an optical information digital storage method based on image type parallel reading and writing.

Background

With the rapid development of artificial intelligence, internet and communication technologies, the human society has rapidly entered the big data era. It is expected that by 2025, the data that needs to be stored globally will reach 163ZB (ze bit), ten times as much as the 2016 generation data (16.1 ZB). At present, data centers still rely on optical disc storage, optical discs store information on a recording surface by using laser beams, information reading and writing can be realized according to different strengths of the laser beams and reflected light, and data information is stored in a binary '0' and '1' form on the surface of the optical disc.

The conventional optical disc reading and writing is mainly performed in an optical disc drive, and a laser head of the optical disc drive is an execution part for reading and writing information from the optical disc, but the conventional optical disc reading and writing is mainly performed in a single-point scanning mode, the reading and writing speed is slow, and in the field of large data storage, the invention of a fast and efficient reading and writing optical storage technology is urgently needed. In recent years, with the continuous improvement of a Digital Micromirror Device (DMD) manufacturing process, the market of the DMD is accelerated, and the DMD is further promoted to be applied in many fields. The DMD has the advantages that the DMD is more suitable for the field of photoetching with rapid and large-area processing, and can realize rapid exposure splicing by combining with an electric moving platform. The optical microscopy technology has the characteristic of wide-field imaging, and is a technology capable of obtaining a magnified image of a tiny sample after visible light which penetrates through the sample or is reflected from the sample passes through one or more lenses. The image can be observed directly by eyes through an ocular lens, recorded by a light-sensitive plate or a digital image detector such as CCD or CMOS, and displayed and analyzed on a computer. Therefore, the digital storage of the optical information of image-type parallel reading and writing can be realized by combining the DMD digital photoetching technology and the optical microscopic imaging technology.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an optical information digital storage technology based on image-based parallel reading and writing. And the digital storage of the optical information read and written in parallel is realized by combining the DMD digital photoetching technology and the optical microscopic imaging technology.

In order to achieve the above purpose, the technical solution of the invention is as follows:

an optical information digital storage method based on image type parallel reading and writing comprises the following steps:

s1) plating a layer of phase-change material film on the optical disk substrate by adopting a magnetron sputtering method;

s2) building a laser writing data device, and placing the optical disc on a motion platform of the laser writing data device;

s3) writing data:

s3.1) importing the data file into an encoder through a computer, and converting the data file into a binary image with 0 and 1 distribution by the encoder;

s3.2) leading the digital signals of the binary images '0' and '1' into a DMD, and simultaneously controlling a motion platform to expose and splice on a phase change material to realize data recording or further transferring the '0' and '1' patterns onto an optical disk substrate;

s4) plating a layer of metal Al film on the phase-change material film and the optical disk substrate on the optical disk by adopting a magnetron sputtering method to be used as a reflecting layer;

s5) building a white light data reading device, and placing the optical disk on a motion platform of the white light data reading device;

s6) reading data;

s6.1) obtaining the surface appearance of the sample of the optical disc through a CCD (charge coupled device), and converting the surface appearance into a binary image with '0' and '1' distribution through an image processing analyzer;

s6.2) "0", "1" distributed binary image is restored into original data file through decoder, realize the data reading.

Compared with the prior art, the invention has the technical effects that the optical information digital storage of image type parallel reading and writing is realized by combining the optical microscopy technology and the DMD digital photoetching technology, so that the reading and writing speed is higher.

Drawings

FIG. 1 is a schematic diagram of an optical information digital storage device for image-based parallel reading and writing;

FIG. 2 is a schematic diagram of an optical information digital storage reading apparatus for image-based parallel reading and writing according to the present invention;

FIG. 3 a binary image;

FIG. 4 shows the surface topography of an optical disc

In the figure: 1-laser light source, 2-light beam, 3-beam expander, 4-light beam shaper, 5-DMD, 6-lens, 7-optical disk, 8-motion platform, 9-base, 10-encoder, 11-motor controller, 12-computer, 13-LED white light source, 14-spectroscope, 15-lens, 16-lens, 17-CCD, 18-image processing analyzer, 19-decoder.

Detailed Description

The present invention is further illustrated by the following examples and figures, but should not be construed as being limited thereby.

Example 1:

s2) placing the optical disc 7 plated with the phase change material on the moving platform 8, as shown in fig. 1;

s3) writing data: as shown in fig. 1, which is a schematic diagram of a data writing apparatus, a laser beam sequentially passes through a beam expander 3, a beam shaper 4, a DMD5, and a lens 6 and then irradiates the surface of an optical disc 7; the DMD5 and the power platform 8 are controlled by a computer 12 through an encoder 10 and a motor controller 11 respectively;

s3.1) importing the data file into the encoder 10 through the computer 12 to be converted into a binary image with 0 and 1 distribution, as shown in FIG. 3;

s3.2) introducing the digital signals distributed by the binary images "0" and "1" into the DMD5, and controlling the motion platform 8 to expose and splice the phase-change material film of the optical disc 7 to realize data recording, so as to obtain the surface topography of the optical disc 7, as shown in fig. 4, wherein the black part represents the recording dot matrix "1" and the white part represents the recording dot matrix "0", or further transferring the "0" and "1" patterns onto the optical disc substrate;

s4) plating a layer of metal Al film as a reflecting layer on the phase-change material film and the optical disk substrate on the optical disk by adopting a magnetron sputtering method again;

s5) placing the optical disk 7 on the moving platform 8, as shown in fig. 2;

s6) read data: as shown in fig. 2, which is a schematic diagram of the data reading apparatus, the LED white light beam sequentially passes through the beam splitter 14, the lens 15, and irradiates the surface of the optical disc 7, and after being reflected by the surface, the LED white light beam sequentially passes through the lens 15, the beam splitter 14, and the lens 16, and reaches the CCD 17; the CCD17 and the motion platform 8 are controlled by a computer 12 through an image processing analyzer 18, a decoder 19 and a motor controller 11 respectively;

s6.1) obtaining the sample surface topography of the optical disc 7 through the CCD17, as shown in FIG. 4, and converting the sample surface topography into a binary image of '0' and '1' distribution through the image processing analyzer 18, as shown in FIG. 3;

s6.2) "0", "1" distributed binary image is restored to original data file by decoder 19, realizing data reading.

Claims

1. An optical information digital storage method based on image type parallel read-write is characterized by comprising the following steps:

s3) writing data:

s6) reading data;