CN1467711A - High-density information storage CD and reading equipment and method thereof - Google Patents
High-density information storage CD and reading equipment and method thereof Download PDFInfo
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Abstract
The present invention relates to a high density information storage CD and read device and a read method, in which the high density CD is composed of a substrate, a information record layer arranged on the substrate, and a packaging layer located on the information record layer, characterized by that: each recording point in the information record layer is mixed with two or more recording media with different scintillation response lamination characteristics, each type of which represents a binary number with one bit and n types of which can be used to allow each of the recording points to represent a binary number with n bits. The reading method is as follow: illuminating the recording point with a foci type short wavelength excitation light source, working out a data bit with a photoelectric conversion CCD array involving variable wave length filtering sheets in the order of the size of the wavelength, receiving light with different wavelengths sent back from the recording point, transferring the optical signal with a variety of different wavelengths into corresponding electrical signal as "0" or "1", and thus allowing n bits of the data recorded in one information record point to be read out.
Description
One, technical field
The present invention is a kind of CD and reading device and method that is used for the high density information storage.Particularly relate to the characteristic spectrum of the packed record medium generation that utilizes different luminosity spectral characteristics, realize that single measuring point information storage is higher than the device of 1 bit function, belongs to the high density information technical field of memory.
Two, background technology
As the high density high capacity information storage technology of realizing magnanimity information processing and transmission technology basis, along with the growing of information industry more and more is subject to people's attention.The key problem of information stores be on the unit yardstick recording medium can canned data the height of capacity, the i.e. storage density of information.With regard to current information storage technology, what mainly adopt is methods such as tape, disk, CD.The information recording carrier of tape and disk technology is the magnetic medium material, and it is by the outfield change that local magnetic domain in the magnetic medium is orientated to be realized binary information record.With state-of-the-art 10Gb/in
2Storage density estimation, the size of its measuring point is about 100nm.CD then is to utilize the difference of the reflective characteristic in recording medium surface to realize binary information record, at present the track space of advanced blue-ray DVD disc has reached 320nm (only be current ruddiness DVD disc half) the most, and its record cell---the minimum diameter of groove (or chemical substance phase change cells) is about 140nm.Disk is compared advantage such as have the recording density height, read or write speed is fast with CD, but cost is higher, also is subject to the influence in outfield.
From the evolution of disk, CD, the main path that improves recording density is by constantly reducing the size of measuring point.But because of being subjected in the read-write equipment relevantly exciting the physical size of probe unit (CD is that laser beam, disk are read/write head) or the restriction of physical influence, the size of measuring point can not ad infinitum reduce down.Utilize the near-field scan probe technique measuring point size can be decreased to about 20nm in the laboratory at present, this may be the minimum dimension of measuring point.
Though the recording medium difference of existing CD or disk, but they are binary number 0 or 1 in the information of single measuring point record, just the information of single-point record is a bit, and these characteristics only are limited in by reducing the size aspect of unit record point the approach that improves the single-deck area recording density.The another kind of mode that realizes that high density information is stored is that the recording of information form is three-dimensional from present 2 D extension.For example, utilize the photorefractive effect recording holographic figure image of some optical crystal, comprise image information two-value or that GTG is arranged, can realize three-dimensional polyad holographic memory, obtain high memory capacity.But there is certain difficulty in holographic memory with the combination of prior art and technology, therefore certainly will cause higher recorded cost.
Three, technology contents 1, technical matters
The object of the present invention is to provide a kind of cost is low, compatible by force, information storage is big high density information stored CD and reading device and method.2, technical scheme
High density information stored CD of the present utility model, formed by substrate, information recording layer, encapsulated layer, it on substrate information recording layer, it on information recording layer encapsulated layer, it is characterized in that each measuring point in the information recording layer is mixed by the recording medium of two or more the different characteristics of luminescences, each recording medium is represented a binary number, utilizes n kind recording medium just can make each measuring point represent the binary number in n position.
Various recording mediums in each measuring point are microgranular, the mode that adopts printing, titration, coating, printing with the recording medium preparation on substrate, or adopt piezoelectricity spraying process, scan-probe dip in the straight literary style of liquid, motherboard overlay method with the recording medium preparation on substrate.Multiple recording medium in each measuring point is overlapping or series arrangement.
The reading device of high density information stored CD of the present invention comprises excitation source and the read head of being made up of narrow bandpass optically filtering sheet, photoelectricity reception conversion array, decoding circuit, excitation source is installed on the read head, photoelectricity in the read head receives the output termination decoding circuit of conversion array, decoding circuit is linked in sequence and is formed by signal amplification circuit, analog to digital conversion circuit, decoding scheme, coding checkout circuit, the information conversion circuit in the conventional CD of the output termination of decoding circuit.
The read method of high density information stored CD of the present invention is with focusing short wavelength's excitation source irradiation measuring point; With the ccd array that is coated with the different wave length filter plate by characteristic wavelength size sequence organized data position, the light of the different wave length that reception is beamed back by measuring point, through opto-electronic conversion various wavelength optical signals are converted to corresponding " 0 " or " 1 " electric signal, thereby the data read of n the bit that writes down on the information measuring point is come out.
The feature photoluminescence spectra that the present invention utilizes the recording medium of various combination to produce comes canned data, and therefore the information recording capacity of single measuring point can be greater than 1 bit, and then can realize a kind of new high density information stored CD.The storage that this high density information stored CD technology mainly comprises information in the selection, CD of encoding and decoding, the recording medium of unit record point with process such as read;
Coding is to have different recording medium that the different characteristics of luminescences and the characteristics of luminescence can be distinguished by the information coding requirement, and discrete sets installs on the corresponding measuring point of information recording carrier; Decoding is with a short wavelength light source instigated recordings carrier, make recording mediums different in each measuring point send corresponding assemblage characteristic spectrum, and utilize narrow bandpass optically filtering sheet to obtain the characteristic spectrum of corresponding different recording medium respectively, thereby obtain the entrained coded message of various recording mediums;
The recording medium of high density information stored CD can be selected for use and can send from can seeing luminescent spectrum material or molecule the infrared band different wave length, that halfwidth is very narrow, as some special nanostructureds (nano dot, nano wire, lar nanometric cavities etc.) and special dye molecule etc.;
If utilize recording medium that a string information is write on each measuring point of CD by coding requirement order successively, finally just formed the high density information stored CD that the present invention proposes; This CD (Fig. 1) structurally comprises three layers, and basecoat is a substrate, can adopt the material of low fluorescent yield; Middle one deck is an information recording layer, wherein each measuring point all comprises the segment information greater than 1 bit, therefore each measuring point needs the recording medium of two kinds of different characteristics of luminescences at least, in the same measuring point position of various recording mediums is not had specific (special) requirements, different recording mediums can overlap each other; The kind of recording medium is many more, and the storable quantity of information of single measuring point is also big more; The preparation of recording medium can adopt modes such as printing, titration, coating, printing to prepare in the measuring point; Last layer is an encapsulated layer, can adopt the material that fluorescent yield is low, transmittance is high, chemical stability is good, as polymer film etc.; But on the CD the CD that reads conventional of canned data read technology, and realized in conjunction with special read head;
It is as follows that the information storage cd-rom that is made of the packed record medium has the principle brief introduction of high density storage characteristics: adopt at least two kinds of recording mediums that emission wavelength is different, for example the four kinds of recording mediums (as nano-quantum point) that are respectively 500nm (I), 550nm (II), 600nm (III) and 650nm (IV) with the luminescent center wavelength are example, these are had the different recording media pack that the different characteristics of luminescences (wavelength and halfwidth) and the characteristics of luminescence can be distinguished install on a certain identical recordings point position of CD; If when this measuring point comprised all above-mentioned four kinds of nano-quantum points, the luminescent spectrum of acquisition just should comprise 500nm, 550nm, four different peak positions of 600nm and 650nm, then the information with correspondence is designated as (1111); If do not have above-mentioned four kinds of nano-quantum points fully, then spectrum does not have above-mentioned glow peak, and corresponding informance is designated as (0000); If only I, III, three kinds of nano-quantum points of IV are arranged, corresponding informance then is (1011); If only two kinds of nano-quantum points of II, IV are arranged, corresponding informance then is (0101); By that analogy;
Such scheme is actual to be to have utilized different recording mediums to improve the information recording capacity of single measuring point, be different from conventional information recording method, each measuring point is only stored the information of 1 bit, this scheme has then utilized the combination of 4 kinds of different recording media to come expression information, so the information of every measuring point rises to 4 bits, therefore a measuring point in this programme is with regard to suitable four measuring point in the conventional CD, so can obviously improve the information storage capacity on the unit area; Obviously, the different recording medium of each measuring point combination is many more, and then its memory capacity is big more;
The memory capacity of the packed record medium high density information stored CD that the present invention proposes can be estimated as follows: if having the luminescence feature wavelength be respectively 450,475,500 ... 1375,1400nm, and the halfwidth of its luminescent spectrum is all less than the multiple recording medium of 25nm, utilize the corresponding above-mentioned wavelength of centre wavelength, bandpass width various narrow bandpass optically filtering sheets less than 20nm, then can differentiate these different recording mediums, the therefore above-mentioned total n=(1400-450) of the recording medium kind/25+1=39 that can be used for information stores; Because the information bit that single measuring point comprises is identical with the kind of recording medium, so the information of each measuring point can be brought up to 39 bits; By technology such as existing printing, coating, printings, the size of single measuring point can be easy to be controlled at about 5 μ m, so the density of measuring point can reach 25.8Mb/in
2, consider that every measuring point can store 39 bit informations, so storage density will reach 1Gb/in
2With existing DVD storage means relatively: ruddiness DVD storage density is about 200Mb/in
2, its measuring point size is about 500nm, and blue-ray DVD is 1Gb/in
2, its measuring point size is about 200nm, and then the high density recording effect of this scheme can be compared with existing blue-ray DVD recording mode of just making great efforts to research and develop fully;
The process that reads of information comprises in this information storage cd-rom: utilize read head to the scanning of CD, exciting, survey, decoding and conversion etc. measuring point; Read head is made up of excitation source and detector, and excitation source is mounted in the short wavelength's excitation source on the detector; Detector comprises that narrow bandpass optically filtering sheet, photoelectricity receive conversion array and decoding circuit; The narrowband optical filter plate of different wave length can adopt the oxide with different refractivity, realize by accurate multilayer film optics preparation method, the filter plate characteristic requires: the transmittance at corresponding feature transmission peak wavelength should be higher than 93%, the bandwidth resolution characteristic is better than 20nm, should be lower than 2% to the transmittance of other wavelength; Photoelectricity receiving element array can be made of panchromatic CCD; Signal after the opto-electronic conversion is by the information conversion circuit of the conventional CD of decoding circuit output back input, and the scanning of read head can be by the scanning servo read method in the conventional optical disc; By decoding and change-over circuit, just the information of this video disc recording can be changed into common binary message string, and then obtain information such as corresponding image and sound; 3, beneficial effect
The present invention compares with existing high density DVD stored CD: the raising of latter's recording density is to realize by the size that reduces measuring point as far as possible, and technological requirement is very high, and has certain limit restriction; And the raising of the former storage density is to realize that by the information storage capacity that increases unit record point the size of measuring point size is not had special requirement, therefore by comparatively simple technology, also can realize highdensity information stores;
High density information stored CD of the present invention has tangible technical advantage: but the kind of different recording medium has determined the bit number of unit record point recorded information, therefore can realize high recording density in theory; Because each measuring point can comprise the recording medium of a greater number, so but guarantee information stores stability and sensitivity preferably; Recording medium has very fast photoresponse, so the speed that reads of information only is subject to subsequent conditioning circuits such as servo and decoding, can reach the reading speed that has CD now at least; In addition, low, the no energy consumption of recording medium cost, high environmental protection, the preparation technology of CD is comparatively simple, and with existing high-density memory technology and microelectronic technique compatibility, is easy to large-scale development and integrated.
Four, description of drawings
Fig. 1 is the structural representation of high-density storage CD, and encapsulated layer 101, recording layer 102, substrate 103 are arranged in the partial enlarged drawing on the right.
Fig. 2 is the position distribution synoptic diagram of nine measuring point 21 of 81 bit informations storage, has among the figure respectively by A, B, C, D, E, F, G, H, tactic nine measuring point of I.
Fig. 3 is for utilizing piezoelectricity spray technology canned data synoptic diagram.
Fig. 4 is the structural representation of needle point on the design (corresponding diagram 2 each measuring point position) of mother matrix in the mother matrix chromatography memory technology and the mother matrix.The shade measuring point represents to have settled corresponding nano-quantum point among the figure, and blank measuring point does not then have the relevant nanometer quantum dot.
Fig. 5 is the schematic layout pattern of 3 * 3 filter plates and opto-electronic conversion array photodetectors, wherein the different pieces of information position of each unit detection of numeral.
Fig. 6 is the structural representation of reading device.
Fig. 7 is the structural representation of high density information storage reading device.
Fig. 8 is the process that the reads synoptic diagram of read head.
Five, specific embodiments
High density information stored CD of the present invention, formed by substrate 103, information recording layer 102, encapsulated layer 101, it on substrate information recording layer, it on information recording layer encapsulated layer, each measuring point 21 in the information recording layer is mixed by the recording medium 22 of two or more the different characteristics of luminescences, each recording medium is represented a binary number, utilizes n kind recording medium can make each measuring point represent the binary number in n position.Various recording mediums in each measuring point are microgranular, the mode that adopts printing, titration, coating, printing with the recording medium preparation on substrate, or adopt piezoelectricity spraying process, scan-probe dip in the straight literary style of liquid, motherboard overlay method with the recording medium preparation on substrate.Multiple recording medium in each measuring point is overlapping or the in-line arrangement row.The read method of high density information stored CD is with focusing short wavelength's excitation source 301 irradiation measuring point; With the opto-electronic conversion ccd array 303 that is coated with different wave length filter plate 302 by characteristic wavelength size sequence organized data position, the light of the different wave length that reception is beamed back by measuring point, through opto-electronic conversion various wavelength optical signals are converted to corresponding " 0 " or " 1 " electric signal, thereby the data read of n the bit that writes down on the information measuring point is come out.For example: utilize the Modular, semiconductor nano-quantum point to constitute the high density information stored CD, and the read head that utilizes narrow bandpass optically filtering sheet to constitute.1. the preparation of semiconductor nano quantum dot and narrow bandpass optically filtering sheet
(1) utilizes metal organic precursor body heat solution (Injection of precursor molecules into a hotsurfactant, " Nature ", 404,59) etc. technology prepares various semiconductor nano materials, by control, obtain having the spectrum of different luminescence features to the character such as particle size, constituent and surface structure of nano material; This example is as follows by the optical characteristics of the various recording mediums that semiconductor nano material constituted: the characteristic wavelength of CdS lays respectively at about 430,460,490, the characteristic wavelength of CdSe lays respectively at 520,550,580,610,640, about 670nm, the glow peak half-breadth of above-mentioned each recording medium is less than 30nm; Obtain 9 kinds of nano-quantum point recording mediums so altogether, and each medium is stored in respectively in the organic solutions such as corresponding chloroform with different characteristic spectrum;
(2) the narrow bandpass optically filtering sheet of employing monox and niobium oxide material preparation multi-layer film structure, by the number of plies, periodic thickness and the every thickness in monolayer in the control multilayer film, can prepare 9 kinds of narrow bandpass optically filtering sheets, the feature emission wavelength of the respectively corresponding above-mentioned various nano-quantum points of their band-pass characteristics wavelength, bandpass width is about 20nm (less than the luminous halfwidth of nano-quantum point); Also can entrust Japanese Shincron company or China Science ﹠ Technology University-Shincron advanced thin films technology and the above-mentioned narrow bandpass optically filtering of material joint laboratory processing and preparing sheet; 2. information stores
For example need to store 111,011,001 010,110,011 100,001,111 001,101,011 011,110,001,111,000,100 001,110,101 110,110,111 000011100 information of totally 81 bits, conventional optical disc storage needs 81 measuring point.This programme then utilizes 9 measuring point just can store above-mentioned information.Concrete steps are as follows:
(1) with the respectively corresponding data bit of above-mentioned 9 kinds of nano dots, and with they have or not (surveying) by spectrographic technique corresponding with binary message, concrete corresponding situation sees Table 1: the relation of the luminescent center wavelength of each nano-quantum point of table 1, code, data bit label, spectral characteristic and binary message
| Centre wavelength 430 460 490 520 550 580 610 640 670 |
| Nano dot code i h g f e d c b a |
| Data bit label 987654321 |
| Nano dot spectrum has/do not have and have/and do not have to have/do not have to have/do not have to have/do not have to have/do not have to have/do not have to have/do not have and have/do not have |
| Binary message 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 1/0 |
(2) above-mentioned 81 bit information packet taggings are become the measuring point (its position on CD is referring to Fig. 2) of 9 diverse locations, then for each measuring point, all form: A by 9 data positions:
111011001B:
010110011C:
100001111D:
001101011E:
011110001F:
111000100G:
001110101H:
110110111I:
000011100The configuration of nano-quantum point and binary message corresponding relation are as shown in the table respectively in each measuring point: measuring point A:
111011001
Measuring point B:
010110011
Measuring point C:
100001111
Measuring point D:
001101011
Measuring point E:
011110001
Measuring point F:
111000100
Measuring point G:
001110101
Measuring point H:
110110111
Measuring point I:
000011100
| Data bit label 987654321 |
| Binary message 111011001 |
| Nano dot spectrum has or not have to be had |
| Nano dot code i h g/e d // a |
| Centre wavelength (nm) 430 460 490/550 580 // 670 |
| Data bit label 987654321 |
| Binary message 010110011 |
| Nano dot spectrum does not have to have or not have and has |
| Nano dot code/h/f e // b a |
| Centre wavelength (nm)/460/520 550 // 640 670 |
| Data bit label 987654321 |
| Binary message 100001111 |
| Nano dot spectrum has or not have to be had |
| Nano dot code i // // d c b a |
| Centre wavelength (nm) 430 // // 580 610 640 670 |
| Data bit label 987654321 |
| Binary message 001101011 |
| Nano dot spectrum does not have to have or not and has |
| Nano dot code // g f/d/b a |
| Centre wavelength (nm) // 490 510/570/640 670 |
| Data bit label 987654321 |
| Binary message 011110001 |
| Nano dot spectrum does not have to have to have or not have and has |
| Nano dot code/h g f e ///a |
| Centre wavelength (nm)/460 490 510 540 ///670 |
| Data bit label 987654321 |
| Binary message 111000100 |
| Nano dot spectrum has or not nothing to have or not nothing |
| Nano dot code i h g ///c // |
| Centre wavelength (nm) 430 460 490 ///610/670 |
| Data bit label 987654321 |
| Binary message 001110101 |
| Nano dot spectrum does not have to have or not and has |
| Nano dot code // g f e/c/a |
| Centre wavelength (nm) // 490 520 550/610/670 |
| Data bit label 987654321 |
| Binary message 110110111 |
| Nano dot spectrum has |
| Nano dot code i h/f e/c b a |
| Centre wavelength (nm) 430 460/520 550/610 640 670 |
| Data bit label 987654321 |
| Binary message 000011100 |
| Nano dot spectrum nothing has or not nothing |
| The nano dot code // // e d c // |
| Centre wavelength (nm) // // 550 580 610 // |
(3) with information stores on measuring point, can adopt one of following three kinds of methods or other method:
(i)
The piezoelectricity insufflationAbove-mentioned 9 kinds of nano-quantum point solution are injected the piezoelectricity spray box (see figure 3) of corresponding label respectively, by piezoelectricity spray technology (when piezoelectric ceramics is expanded by driven, nano-quantum point solution in the extruding spray box, it is sprayed fast) from nozzle, with the different nano dots combination sprays of corresponding each information to the substrate on the corresponding measuring point position (substrate can adopt the material of low fluorescent yield, as silicon, glass, plastics etc.); For example for the A measuring point, the voltage of drive pressure electroceramics need be added to respectively on the nozzle of six data bit correspondences such as 1,4,5,7,8,9, make 6 kinds of nano-quantum point combinations such as a, d, e, g, h, i spray to the A measuring point position of substrate, thereby make the binary message of this measuring point storage last 111011001; The B measuring point then is added to the voltage of drive pressure electroceramics respectively on the nozzle of five data bit correspondences such as 1,2,5,68; The situation of all the other measuring point is analogized; The measuring point size that this method obtains is about 10 μ m;
(ii)
Scan-probeDip in liquid
Straight literary styleUtilize the liquid that dips in of scanning probe microscopy directly to write (Dip-Pen) method (" Science ", 283,661), by multiprobe technology (this programme can adopt 9 probes), every probe dips in the solution that comprises above-mentioned 9 kinds of nano-quantum points respectively, method in similar then (i), respectively on 9 measuring point positions such as A～I of substrate according to information requirements, write corresponding nano-quantum point respectively by the desired data position; The size of the measuring point that this method obtains can be less than 0.5 μ m;
(iii)
The mother matrix overlay methodThe above-mentioned liquid direct writing technology that dips in is applied in the mother matrix preparation, can repeats quick storage information easily; The design and the preparation method of mother matrix are summarized as follows: need nine mother matrixs in this programme, (or nano-quantum point a～i), as shown in Figure 4, wherein the shadow region in the mother matrix represents that outstanding tip-like structure (seeing enlarged drawing) is arranged to respectively corresponding 1～No. 9 data bit; The mother matrix material is silicon or silicon nitride, and its preparation method can utilize the photoetching technique in the microelectronic technique; According to the information of each measuring point record of A～I in 2 (2), the corresponding data position that mother matrix 1 provided is that 1 a nano dot should (promptly need carve needle point in above-mentioned measuring point position) occur in seven measuring point positions such as A, B, C, D, E, G, H; The corresponding data position that mother matrix 2 provided is that 2 b nano dot should occur in four measuring point such as B, C, D, H; The corresponding data position that mother matrix 3 provided is that 3 c nano dot should occur in five measuring point such as C, F, G, H, I; The rest may be inferred by analogy; Then can obtain nine corresponding mother matrixs altogether; The one side that above-mentioned mother matrix 1 has needle point is dipped in corresponding nano-solution a, and aiming at then needs this recording of information point position (Fig. 2) of storage accordingly on the compact disc substrate, and nano-quantum point a cover is imprinted on the relevant position of CD; Successively other 8 mother matrixs are carried out aforesaid operations (each mother matrix dips in corresponding nano-solution, and as mother matrix 2 corresponding nano-quantum point b solution, the rest may be inferred by analogy), just finished the storing process of optical disc information; The measuring point size that this method obtains is about 2 μ m; 3. the encapsulation of CD
Polymethylmethacrylate (PMMA) solution that utilizes whirl coating technology will dilute (concentration～2%) evenly covers on the cd side, and cover thickness is about 100nm, has just finished the CD encapsulation; 4. information reads
(1) select full color imaging high-sensitive CCD (for example: the specification that Panasonic company produces is the CCD of MN39116KT) to constitute the opto-electronic conversion detector array; Light activated element among the CCD is combined into 3 * 3 array, and (every cell array size is about 0.3mm * 0.3mm, large-sized array helps the sensitivity that improves acquisition of signal), and before this array, settle 9 kinds of filter plates (referring to Fig. 5) of the corresponding 0.3mm * 0.3mm size of preparation in the step 1 (2);
(2) will be coated with the ccd array of different filter plates by characteristic wavelength size sequence organized data position (specifically seeing Table 1), the array element that promptly is coated with 670nm wave length filtering sheet corresponds to the 1st data bit, and the array element that covers 430nm wave length filtering sheet corresponds to the 9th data bit (referring to Fig. 5);
(4) photoelectric conversion element array and the corresponding decoding circuit 304 (comprising circuit such as signal amplification 305, analog to digital conversion 306, decoding 307, coding checkouts 308) thereof with focusing short wavelength's excitation source (for example wavelength is the blue laser of 380nm), 9 kinds of filter plates of above-mentioned covering constitutes read head (referring to Fig. 6), and the sweep circuit in the disc accessing of routine, information conversion circuit etc. can be formed disc accessing of the present invention (Fig. 7) again.Under servo circuit control as sweep circuit, scan and excite each information measuring point on the CD with focusing short wavelength's excitation source, and utilize the above-mentioned ccd array that is coated with the narrow bandpass filter plate that light signal is converted to electric signal, read corresponding binary code through decoding circuit again; For example when scanning the A measuring point, scale-of-two is output as: 111011001; When scanning the E measuring point, scale-of-two is output as: 011110001 (referring to Fig. 8); After 9 measuring point such as the intact A～I of sequential scanning, just obtained the complete information of storing in the CD (Fig. 8): 111,011,001 010,110,011 100,001,111 001,101,011,011,110,001 111,000,100 001,110,101 110,110,111 000011100; Convert thereof into the respective image of representative or sound etc. by follow-up information conversion circuit again.
Claims (5)
1, a kind of high density information stored CD, formed by substrate (103), information recording layer (102), encapsulated layer (101), on substrate (103) information recording layer (102), on information recording layer (102) encapsulated layer (101), it is characterized in that each measuring point (21) in the information recording layer (102) is mixed by the recording medium (22) of two or more the different characteristics of luminescences, each recording medium is represented a binary number, utilizes n kind recording medium (22) to make each measuring point (21) represent the binary number in n position.
2, high density information stored CD according to claim 1, it is characterized in that the various recording mediums (22) in each measuring point (21) are microgranular, the mode that adopts printing, titration, coating, printing with the recording medium preparation on substrate (103), or adopt piezoelectricity spraying process, scan-probe dip in the straight literary style of liquid, motherboard overlay method with the recording medium preparation on substrate (103).
3, high density information stored CD according to claim 1 and 2 is characterized in that the multiple recording medium (22) in each measuring point (21) is overlapping or in-line arrangement row.
4, a kind of reading device of high density information stored CD, it is characterized in that this device comprises excitation source (301) and by narrow bandpass optically filtering sheet (302), photoelectricity receives conversion array (303), the read head that decoding circuit (304) is formed, excitation source (301) is installed on the read head, photoelectricity in the read head receives the output termination decoding circuit (304) of conversion array (303), decoding circuit (304) is by signal amplification circuit (305), analog to digital conversion circuit (306), decoding scheme (307), coding checkout circuit (308) is linked in sequence and forms, the information conversion circuit in the conventional CD of the output termination of decoding circuit (304).
5, a kind of read method of high density information stored CD is characterized in that with focusing short wavelength's excitation source irradiation measuring point (21); With the ccd array that is coated with the different wave length filter plate by characteristic wavelength size sequence organized data position, the light of the different wave length that reception is beamed back by measuring point (21), through opto-electronic conversion various wavelength optical signals are converted to corresponding " 0 " or " 1 " electric signal, thereby the data read of n the bit that writes down on the information measuring point is come out.
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| CN112771215A (en) * | 2018-09-28 | 2021-05-07 | 哈佛学院院长等 | Storing information using a mixture of molecules |
| CN113838485A (en) * | 2020-06-08 | 2021-12-24 | 中国科学院上海高等研究院 | Two-dimensional information code writing and fast reading method and device for optical disc |
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2003
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| CN112771215A (en) * | 2018-09-28 | 2021-05-07 | 哈佛学院院长等 | Storing information using a mixture of molecules |
| CN113838485A (en) * | 2020-06-08 | 2021-12-24 | 中国科学院上海高等研究院 | Two-dimensional information code writing and fast reading method and device for optical disc |
| CN112562744A (en) * | 2020-07-03 | 2021-03-26 | 暨南大学 | Double-pulse excitation method for ultrafast and super-resolution full photomagnetic recording |
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