CN104134448A - Multi-wavelength laminated fluorescence data memory, device manufacturing method of multi-wavelength laminated fluorescence data memory and reading method of multi-wavelength laminated fluorescence data memory - Google Patents
Multi-wavelength laminated fluorescence data memory, device manufacturing method of multi-wavelength laminated fluorescence data memory and reading method of multi-wavelength laminated fluorescence data memory Download PDFInfo
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Abstract
The invention discloses a multi-wavelength laminated fluorescence data memory, a device manufacturing method of the multi-wavelength laminated fluorescence data memory and a reading method of the multi-wavelength laminated fluorescence data memory, and belongs to an optical information storage technology. The multi-wavelength laminated fluorescence data memory, the device manufacturing method and the reading method provided by the invention have a thought that incident laser is used and is irradiated onto an information layer to be read of a fluorescence memory; fluorescence signals are generated when fluorescence media in a groove of an information bit of the information layer absorbs energy; the wavelength of the fluorescence signals is different from that of others, so that a CCD (Charge Coupled Device) detector uses one filter plate to filter out the signals with the wavelength beyond the wavelength of the fluorescence excited by the information layer to be read, and a CCD is enabled to only receive the fluorescence signals of the information layer to be read; and after the reading completion of one layer of information, a computer is used for controlling a filter to be switched to the filter plate corresponding to the information layer to be read. The condition that the fluorescence signals received by the CCD only contain the signals of the information layer to be read is ensured, so that the goal of layer selection is achieved.
Description
Technical field
The invention belongs to optical information memory technology, be specifically related to making and the memory reading method of fluorescent material.
Background technology
Optical data storage techniques is widely used at audio-video and computer data field of storage as CD and DVD CD.Optical information memory technology is to utilize Ear Mucosa Treated by He Ne Laser Irradiation medium, makes medium generation physics, chemical change, the technology that information is stored by the interaction of laser and medium.For adapting to the development need of computer technology, the memory data output of memory device is every year with 60% speed increment, people are further improving the memory capacity of storer by every means at present, and it is that the storage density that increases considerably magnetic and optical record medium realizes that present stage extensively adopts the method for increase capacity of memory device.
In optical recording field, the capacity that increases information carrier is trend, and the method for increasing data capacity after deliberation comprises use many Information Levels, for example DVD(digital video disc) can comprise two Information Levels.Multiplayer optical disk is proposed by Philips and IBM Corporation, but with regard to multiplayer optical disk, the CD of existing multilayer is difficult to distinguish because the coherence of detecting light beam produces interference, scattering and internal layer cross (talk) etc. to multiplayer optical disk the signal [Yang Shuguang accepting, Zhang Fumei. multilayer fluorescent optical disc-C3D technology is probed into [J]. optical disc, 2000(5): 19-23].
Therefore for Multilayer Memory, not only requirement can store enough quantity of information, response rapidly, exigent signal to noise ratio (S/N ratio) also, existing technology is difficult to realization.
Summary of the invention
The object of the invention is further to improve memory capacity and response speed and the data antijamming capability of storer.
According to an aspect of the present invention, a kind of multi-wavelength stack fluorescent data-carrier store, includes the information storage medium of at least two layers, is provided with the groove that comprises fluorescent material on described information storage medium; Fluorescent material on the information storage medium of every layer has each other different emission peaks after exciting; Described information storage medium is the material of printing opacity.
As improvement, the fluorescent material on the information storage medium of every layer has each other different maximum emission peaks after exciting.
As improvement, the fluorescent material on every one deck is same; Fluorescent material is between layers mutually different.
As improvement, the fluorescent material of each layer can inspire fluorescence under same excitation wavelength.
As improvement, described information storage medium is five layers.
As improvement, have at least the fluorescent material in one deck information storage medium to adopt the one in following five kinds of fluorescent materials:
{[Tb
2(MFDA)
2(HCOO)
2(H
2O)
6]·H
2O}
n、
[Sm
3(MFDA)
4(NO
3)(DMF)
3]
n、
[Eu
3(MFDA)
4(NO
3)(DMF)
3]
n、
[Dy
2(PDA)
2(HCOO)(OH)(H
2O)]
n、
{[Cu
2(BPCA)(PPh
3)
2I
2]·
2CH
2Cl
2}
n。
As improvement, on every layer of information storage medium, adopt respectively the one in five kinds of described fluorescent materials, and every layer is not identical.
As improvement, described excitation wavelength is 380 nm.
As improvement, the material of described printing opacity is inorganic material or polymkeric substance.
As improvement, described inorganic material is glass; Described polymkeric substance is polycarbonate, Polyvinylchloride, polystyrene or polyacrylic acid.
According to another aspect of the present invention, a kind of multi-wavelength stack fluorescent data access arrangement, include above-mentioned multi-wavelength stack fluorescent data-carrier store, a side at described multi-wavelength stack fluorescent data-carrier store is provided with incident laser device, on multi-wavelength stack fluorescent data-carrier store, in fluorescent emission direction, is disposed with wave filter and detector; The filter range of described wave filter is adjustable.
As improvement, in described wave filter, include filter plate, the number of filter plate is identical with the number of plies of information storage medium, and the wavelength that filter plate passes through is identical with the maximum wavelength of fluorescence inspiring of the fluorescent material of every layer.
According to another aspect of the present invention, a kind of multi-wavelength stack fluorescent method for reading data, comprise the steps: the 1st step, on multi-wavelength stack fluorescent data-carrier store, send incident laser, make fluorescent material inspire fluorescence, by wave filter, fluorescence is carried out to filtering again, the fluorescence that fluorescent material on one deck is wherein produced sees through, then by detector, the fluorescence seeing through is detected; Change the irradiation position of incident laser on above-mentioned one deck, and repeat the step of filtering and detection; The filter wavelength of the 2nd step, change wave filter, the fluorescence that another layer of upper fluorescent material sent sees through, and repeating step 1, obtains data.
According to another aspect of the present invention, the application of fluorescent material in optical memory, described fluorescent material is { [Tb
2(MFDA)
2(HCOO)
2(H
2o)
6] H
2o}
n,
[Sm
3(MFDA)
4(NO
3)(DMF)
3]
n、
[Eu
3(MFDA)
4(NO
3)(DMF)
3]
n、
[Dy
2(PDA)
2(HCOO)(OH)(H
2O)]
n、
{ [Cu
2(BPCA) (PPh
3)
2i
2]
2cH
2cl
2}
nin at least one.
As improvement, preferably 5 kinds.
compared to existing technology, technical scheme of the present invention has following beneficial effect:
Though 1, the horizontal resolution of the every one deck of fluorescent multi-layer storage has certain restriction, but contrast single layer of memory, fluorescent multi-layer storage memory space is much more a lot of than single layer of memory.
2, be conducive to light stimulus, the fluorescent material that the present invention uses contrasts existing fluorescent material (as aromatic hydrocarbons) and has very high fluorescence transformation efficiency, is conducive to reading of memory signals fast and stable.Fluorescent material good stability can not lose efficacy after high temperature and long storage time, can the resting period of a specified duration, can repeatedly read.
3, multi-wavelength stack fluorescent storer of the present invention utilizes multiple wavelengths filter to reach the object of selecting layer, and existing fluorescent multi-layer storage utilizes laser variable-focus technology choosing layer, and this storer has higher signal to noise ratio (S/N ratio).
Brief description of the drawings
Fig. 1 is the multi-wavelength stack fluorescent memory construction schematic diagram shown in embodiment, wherein: 1 is incident laser, 2 Information Levels for ccd detector, 3 wave filters for different fluorescence wave bands, 4 storeies, 6 fluorescence that inspire for the Information Level that continues.
Fig. 2 is the multi-wavelength stack fluorescent memory operation schematic diagram shown in embodiment, wherein: the unit and fluorescence units that the light, 8 that 1 be other Information Levels for the wave filters of different wavelength of fluorescence, 4 for Information Level, 5 for ccd detector, 3 for incident laser, 2 the fluorescence that inspire, 6 fluorescence that inspire for the Information Level that continues, 7 are incident laser produces in Information Level reflection and scattering is Information Level.
Fig. 3 is the fluorescence emission spectrum of complex, and 1～5 curve indicating in figure refers to respectively complex 1～5.
Embodiment
Below in conjunction with accompanying drawing 1 and Fig. 2, technical scheme of the present invention is elaborated:
Thinking of the present invention is to utilize incident laser to be radiated on the Information Level continuing of fluorescent storage device, produces fluorescence signal in the time that the fluorescent media in the groove of information bit on described Information Level absorbs energy.This fluorescence signal, because it is different from other wavelength, finally utilizes a filter plate to leach the wavelength the wavelength of fluorescence exciting except continued Information Level at ccd detector, guarantees that CCD receives the fluorescence signal of the Information Level that only continues.
The structure of fluorescent storage apparatus of the present invention as shown in Figure 1, comprise incident laser instrument 1, ccd detector 2, multi-wavelength wave filter 3, scribble the Information Level 4 of fluorescence fluorescent media.Incident laser device 1 is for launch corresponding laser to Information Level, concrete restriction can not done in its position, be generally the top that is positioned at Information Level, those skilled in the art know as long as the laser orientation information layer surface of its ejaculation also can be made to the light directed toward detector of reflection.Laser after excitation fluorescent material, produces fluorescence on Information Level, in the ejaculation direction of fluorescence, is provided with filter plate 3, is provided with ccd detector 2, for receiving fluorescence signal at the rear portion of filter plate 3.
The Information Level 4 of fluorescent multi-layer storage such as, such as, by making such as transparent inorganic material (glass) or polymkeric substance (polycarbonate, Polyvinylchloride, polystyrene, benzene olefin(e) acid), Information Level 4 is at least two-layer, can be also multilayer (in the present embodiment taking 5 layers as example).Adopt polycarbonate to make material as Information Level, the major part of storer is with reeded Information Level 4 to form by multiple, and it looks like and is with from level to level fluted film, and these grooves are used for arranging fluorescence labeling information.In the present embodiment, be all filled with fluorescent material in the groove on the Information Level of every one deck, in order to make testing process convenient, optimum mode is in same layer, to insert same fluorescent material, and the fluorescent material of inserting on different layers is mutually different.
The manufacturing technology scheme of fluorescent material of the present invention is elaborated below: the making of the fluorescent material of various different excitation wavelengths in the present invention, be to utilize to there is the organic ligand of different fluorescent characteristics and the nitrate of rare earth metal, carry out coordination reaction by solvent-thermal method and be prepared.And by changing the doping ratio of two kinds of organic ligands, thereby realize the gradual change of the fluorescence emission spectrum of complex.
The part adopting is as follows:
{ [Tb
2(MFDA)
2(HCOO)
2(H
2o)
6] H
2o}
n(complex 1)
[Ln
3(MFDA)
4(NO
3) (DMF)
3]
n(when Ln is Sm, be complex 2; When Ln is Eu, be complex 3)
[Dy
2(PDA)
2(HCOO) (OH) (H
2o)]
n(complex 4)
{ [Cu
2(BPCA) (PPh
3)
2i
2]
2cH
2cl
2}
n(complex 5)
Wherein, H
2mFDA is 9,9-dimethyl fluorene-2,7-dicarboxylic acid, H
2pDA is to benzene diacrylate, and BPCA is two (Pyridine-4-Carboxaldehyde) nitrine, PPh
3for triphenylphosphine; DMF is DMF.
Synthesis step is as follows:
synthesizing of complex 1
By 9,9-dimethyl fluorene-2,7-dicarboxylic acid H
2mFDA (0.1 mmol, 28.2 mg), Tb (NO
3)
36H
2o (0.1 mmol, 45.2 mg) and DMF (DMF) (5 mL), EtOH (2 mL), H
2o (1 mL) mixes, and packs 25 mL into in teflon-lined stainless steel cauldron, puts into baking oven, at the temperature of 120 ° of C, constant temperature 3 days, naturally cools to room temperature, filters, obtain colourless bar-shaped crystal, absolute ethanol washing, vacuum drying.
synthesizing of complex 2 and 3
The synthetic method of complex 2 and 3 is similar, only describes the synthetic of complex 2 at this.By 9,9-dimethyl fluorene-2,7-dicarboxylic acid (H
2mFDA) (0.1 mmol, 28.2 mg), Sm (NO
3)
36H
2o (0.1 mmol, 44.4 mg) and DMF (DMF) (5 mL), EtOH (2 mL), H
2o (1 mL) mixes, and packs 15 mL into in teflon-lined stainless steel cauldron, puts into baking oven, at the temperature of 80 ° of C, constant temperature 3 days, naturally cools to room temperature, filters, obtain colourless bar-shaped crystal, absolute ethanol washing, vacuum drying.
synthesizing of complex 4
Will be to benzene diacrylate (H
2pDA) (0.2 mmol, 43.6 mg), Dy (NO
3)
36H
2o (0.2 mmol, 91.4 mg) and DMF (5 mL), H
2o (5 mL) mixes, and packs in the stainless steel cauldron of 15 mL with polytetrafluoro tetraene liner, puts into baking oven, at the temperature of 160 ° of C, constant temperature 3 days, naturally cools to room temperature, filters, obtain colourless acicular crystal, absolute ethanol washing, vacuum drying.
complex5
synthetic
The in the situation that of continuous stirring, the cuprous iodide powder of 38.1mg (0.2mmol) is joined in the dichloromethane solution that contains 104.9mg (0.4mmol) triphenylphosphine, stir after about one hour and obtain colourless clear liquid.Now add 21mg (0.1mmol) part BPCA, continue to stir until solution becomes faint yellow clear liquid simultaneously.Filter, filtrate leaves standstill, and obtains light yellow crystal, absolute ethanol washing, vacuum drying after several days.
The structure of complex is:
the structure of complex 1
In the asymmetric cell of complex 1, contain a Tb who is positioned on diad
3+ion, 15 MFDA part (C (8) is positioned on another diad), half formate ion, 15 water of coordination molecule and 1/4th free hydrones.Tb (1) and 8 oxygen atom ligands, 4 oxygen are wherein from 4 MFDA parts, and 2 oxygen are from 2 hydrones, and latter two oxygen comes from hydrone or formate ion.O (1), O (2), C (1)-C (8) is approximate to be positioned in same plane, and wherein C (3) atom departs from the degree maximum of the least square plane of being determined by these atoms, is 0.0408.MFDA part adopts
μ 4the mode of bridging has connected four Tb ions, wherein its each carboxyl oxygen atom separately with a Tb
3+ion is connected.Tb
3+ion exists
bcform with linear queue in face is arranged, adjacent two Tb in each linear queue
3+ion by two almost two carboxyl doube bridges in coplanar MFDA part join, formed the bar-shaped secondary structure unit of Tb-O-C of one dimension.The bar-shaped secondary structure unit of Tb-O-C is by 9 in MFDA part, 9-dimethyl fluorene part forms respectively the bar-shaped packed structures of three-dimensional pcu type along [011] and [0-11] direction bridging, have the one dimension rhombus duct being occupied by formate ion and hydrone in structure.Known by calculating, in the complex 1 after desolventizing, in each structure cell, have 768.57
3the cavity volume that holds other solvent molecules, account for 29% of unit cell volume.
the structure of complex 2 and 3
Complex
2with
3be isomorphism, only describe complex at this
2structure.Complex
2asymmetric cell in comprise 15 Sm (III) ion, two MFDA
2-part, half NO
3-, the DMF solvent molecule of 15 coordination.The coordination number of Sm (1) ion is seven, and coordination atom is respectively from six oxygen atoms of six MFDA parts and an oxygen atom of DMF molecule.The coordination number of Sm (2) ion is also seven, and coordination atom is respectively from two oxygen atoms of the nitrate ion of four oxygen atoms of four MFDA parts, a bidentate chelating and an oxygen atom of DMF molecule.MFDA part adopts
μ 4the mode of bridging has connected four Sm ions, and wherein each carboxylic acid oxygen atom connects respectively a Sm ion.First Sm ion is connected into the bar-shaped secondary building unit of Sm-O-C (SBU) extending along [101] direction of one dimension by the carboxyl of MFDA part.9 of MFDA part, 9-dimethyl fluorene unit further couples together formation ladder two adjacent bar-shaped secondary building units of Sm-O-C, wherein step by two kinds of differences towards 9,9-dimethyl fluorene units alternately rearranges.Other four bar-shaped secondary building units of adjacent Sm-O-C on the bar-shaped secondary building unit connection of each Sm-O-C (1-1-1) and (11-1) crystal face, thereby form the bar-shaped packed structures of three-dimensional pcu type, and had openings of sizes to be about 9.3 × 5.1 in [101] direction
2rhombus duct, DMF molecule is present in duct as coordination guest molecule.Known by calculating, the complex after desolventizing
2in, in each structure cell, have 1183.0
3the cavity volume that holds other solvent molecules, account for 28.7% of unit cell volume.
the structure of complex 4
In the asymmetric cell of complex 4, contain independently Dy ion of two kinds of crystallography, a complete PDA part, the PDA part of two half, a formate ion, a hydroxide ion and a hydrone.Formate ion is to be obtained by the decomposition of DMF in solvent thermal reaction process.Dy1 center and 9 oxygen atom ligands, 5 oxygen atoms are wherein from 4 PDA parts, and 2 oxygen are from a formate ion, and 1 oxygen is from the oxygen atom of hydroxyl, and last 1 oxygen comes from hydrone.The coordination environment at Dy1 center is the anti-quadrangular of single cap of distortion.Dy2 center is also and 9 oxygen atom ligands, and 6 oxygen atoms are wherein from 5 PDA parts, and 2 oxygen is from the oxygen atom of two hydroxyls, and 1 oxygen is from formate ion.The coordination environment at Dy2 center is three cap triangular prisms of distortion.From the O3 of part PDA, O5, O7 and from hydroxide ion
μ 3-O10 couples together a Dy1 ion and two Dy2 ions, has formed the Dy of the incomplete similar cubane type of a distortion
3o
4metal oxygen cluster.These Dy
3o
4bunch by sharing cube Shang Dy2 center, summit and other Dy
3o
4bunch be connected, so just formed along
bthe one-dimensional rod-like secondary building unit that axle extends, O11 wherein has further connected adjacent Dy
3o
4heDy2 center, Cu Dy1 center.These bar-shaped secondary building units exist
abin face, be arranged in parallel with each other, so just formed the structure of two-dimensional layer.Between bar-shaped secondary building unit in layer, further do not connect.But, the bar-shaped secondary building unit of interlayer is connected with other bar-shaped secondary building unit in the following manner by PDA part: each bar-shaped secondary building unit is connected with the bar-shaped secondary building unit of other four arest neighbors from different layers, wherein two from adjacent upper strata, and in addition two from adjacent lower floor.Therefore, these bar-shaped secondary building units are connected by four bar-shaped secondary building units of PDA part and other, thereby have formed the bar-shaped packed structures of pcu type.
the structure of complex 5
X-ray single crystal diffraction result shows, complex
5asymmetric cell in contain a monovalence metal copper ion, an iodide ion, a triphenylphosphine molecule, dichloromethane solvent molecule of a half-sum of a part BPCA molecule.Complex
5in comprise (PPh
3)
2cu
2(μ-I)
2unit.This element forms an one-dimensional chain through part BPCA bridging.At complex
5in, the tetrahedral structure that the coordination geometric configuration of univalent copper ion is slight distortion.Complex
5in, univalent copper ion is four-coordination, coordination atom is respectively the nitrogen-atoms on one of them pyridine ring of part BPCA, a phosphorus atoms and two iodine atoms on triphenylphosphine.Complex
5in have Cu
2i
2double-core copper bunch, wherein the distance between copper copper is 2.9864 (16), between this explanation copper copper, exists metallized metal to interact.
The more synthetic and sign content of complex 1～4 can be consulted " design of luminescence rare earth metal-organic framework materials is synthesized and performance study ", Li Honghui, Nanjing Univ. of Posts and Telecommunications's master thesis, 2013.Complex 5 more synthetic with characterize content and can consult " synthetic, the structure of Cu (I) complex of pyridine radicals schiff alkali, the assorted nitrogen ligand of phosphine mixture and spectral quality research ", Zhou Xinhui, University Of Shantou's master thesis, 2006.
Fig. 3 is complex
1-
5room temperature solid emission spectrum.Be under the exciting of exciting light of 380 nm in excitation wavelength, complex
1there are wide maximum emission peak, complex at 426 nm places
2there is wide maximum emission peak at 436 nm places, with pure H
2mFDA part is compared the red shift that approximately has 20 nm left and right, can judge complex
1with
2transmitting be to be produced by π-π * transition of the MFDA part of coordination.From complex
3emission spectrum in can see at 581 nm, 592 nm, there is an acromion at 615 nm(620 nm places), there is emission peak at 654 nm and 703 nm places, these emission peaks can belong to Eu
3+the characteristic emission of ion:
5d
0→
7f
j(J=0,1,2,3,4).At complex
3in, part H
2the strong blue emission of MFDA has disappeared completely, and complex has been shown strong Eu
3+the red emission of ion characteristic, this explanation MFDA part has been transferred to Eu energy efficient
3+ion.Complex
4show strong blue emission, with the luminescent spectrum class of a curve of part seemingly, its emission maximum is 468 nm (having two acromions at 448 nm and 485 nm places), compared with pure part red shift 34 nm, complex
4luminous should be to be produced by π-π * transition of the PDA part of coordination.Complex
5have an emission maximum at 515nm place, this emission wavelength is just in time within the emission wavelength ranges in part BPCA, so can judge thus complex
5cause in the internal electron transition (IL) that is emitted as part BPCA at 515nm place.Complex
5also has the weak emission peak of an intensity at 590nm place, the comprehensive relatively emission spectrum of ligands and complexes, we infer that the transmitting of this wave band may cause to (MLCT) electronic transition of part to (LMCT) or the metal of metal from part.
The making of fluorescent multi-layer storage, storer of the present invention is made with the method for making of common CD and DVD basically identical, and the present invention adopts hot-die pressurization to make.In this compressing tablet process, first, metal form at high temperature produces groove to the hot pressing of polycarbonate thin plate, and then, recycling fluorescence dye liquor fills up the groove of information bit, and full-filling is carried out in a spiral manner.After solution paint solidifies, allow Information Level from level to level be superimposed together.
The information read method of fluorescent multi-layer storage of the present invention is as Fig. 2, and concrete steps are as follows:
1) incident laser fluorescence excitation: the laser that incident laser 1 sends enters through lens the Information Level that storer one deck continues, and the in-plane scanning along Information Level at continued Information Level, when laser scanning is when being filled with in the groove of fluorescent media, unit and fluorescence unit 4 absorbs energy, produce fluorescence signal, so also just produced information light.
2) information light-receiving: after described information light produces, before being received by ccd detector 2, can be first by one deck filter plate 3, the wavelength of fluorescence that different Information Levels give off is different, the fluorescence excitation consistent wavelength of the wavelength that corresponding filter plate passes through and each layer of Information Level, the present invention adopts 5 layers of Information Level, the fluorescent material arrangement mode of every one deck full-filling, and the Information Level of top layer ground floor adopts { [Tb
2(MFDA)
2(HCOO)
2(H
2o)
6] H
2o}
n, the second layer [Dy
2(PDA)
2(HCOO) (OH) (H
2o)]
n, the 3rd layer of { [Cu
2(BPCA) (PPh
3)
2i
2] 2CH
2cl
2the 4th layer of [Ln of n
3(MFDA)
4(NO
3) (DMF)
3]
n(when Ln is Sm, for complex 2 is the 4th layer; When Ln is Eu, for complex 3 is layer 5), for avoiding irradiating the impact that can be irradiated to other aspects while continuing Information Level and excite other wavelength (fluorescence that inspire 5 of example other Information Levels as shown in FIG.) and incident laser reflection and scattering (reflecting and the light 7 of scattering generation at Information Level of example incident laser as shown in FIG.), information light can first pass through wave filter 3, be irradiated to afterwards on the photosurface of CCD 2, realize the reception of information light.The filter wavelength of wave filter 3 should regulate, it can be adjusted to consistent with the emission wavelength of the fluorescent material of every one deck, it includes 5 filter plates in the present embodiment, each filter plate is consistent with the emission wavelength of these 5 kinds of fluorescent materials respectively, in the time need to reading the wavelength of certain one deck, by the method for changing filter plate, the filter state of wave filter 3 is switched to this filter filter disc.In general, as long as the emission peak difference of the fluorescent material between ensureing every layer, just can leach by the emitting fluorescence of selecting that one deck fluorescent material that suitable wave filter reads needs, but for the effect that improves filter filter and read, the maximum emission peak that preferably can ensure the fluorescent material of every layer can be different, so just can improve the effect of filtering, if can make the interval between the maximum wavelength of finding peak larger, just can improve further filtering and read effect.
3) the obtaining and identifying of information: the information light that illuminating bundle produces at the Information Level continuing is being received the time receiving by CCD2, reflection and scattered light signal that information light needs the fluorescence signal of read message layer and produces from undesired signal and the incident laser of other Information Levels, before received, pass through one deck filter plate, filter plate is to allow the filter plate that only allows specific wavelength pass through, and includes respectively in the present embodiment 426nm filter plate, 436nm filter plate, 468nm filter plate, 515nm filter plate, 654nm filter plate; From top to bottom, the wavelength of fluorescence that different Information Level fluorescent materials excite is 426nm, 436nm, 468nm, 515nm, 654nm arrangement to storer.When laser incides the Information Level that continues, filter plate switches to and this layer of filter plate that wavelength of fluorescence is corresponding.Only treat the fluorescence signal of read data place Information Level by the information light receiving after filter plate, thereby reach jamproof effect.In conjunction with the analysis of the characteristics of luminescence of 5 kinds of above-mentioned fluorescent materials, in this storer, adopt these 5 kinds of fluorescent materials also tool have the following advantages: these 5 kinds of fluorescent materials can be launched fluorescence under same excitation wavelength 380 nm, and the emission peak of fluorescence emission spectrum all has obvious difference, and maximum emission peak each other can have obvious dislocation, this just can make only to use and just can make whole 5 layers of fluorescent storage device launch fluorescence with a branch of excitation line simultaneously, and fluorescence significantly filtered device filters respectively, has simplified operation.
4) reading continuously of individual layer information: the laser that computerizeds control enters the movement of emitter and the rotation of storer, makes this laser instrument move along horizontal X-direction at the middle mind-set edge of storer, reads all information of individual layer.
5) choosing layer: it is to utilize filter plate 3 choosing layers that the present invention selects layer, is running through after one deck information, utilizes computer control wave filter to switch to the corresponding filter plate of the Information Level continuing.Guarantee fluorescence signal that CCD2 the receives signal of Information Level that only continues, thereby reach the object of choosing layer.
6) multi-layer information contact is read: repeat above-mentioned steps 2) to the process of step 5), until the Information Read-Out of the multilayer fluorescent storage device that need are continued.
The explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted in these embodiment shown in this article, meet the wider scope consistent with principle disclosed herein and features of novelty but can be applied to.
Claims (10)
1. a multi-wavelength stack fluorescent data-carrier store, is characterized in that: include the information storage medium of at least two layers, be provided with the groove that comprises fluorescent material on described information storage medium; Fluorescent material on the information storage medium of every layer has each other different emission peaks after exciting; Described information storage medium is the material of printing opacity.
2. multi-wavelength stack fluorescent data-carrier store according to claim 1, is characterized in that: the fluorescent material on the information storage medium of every layer has each other different maximum emission peaks after exciting.
3. multi-wavelength stack fluorescent data-carrier store according to claim 1, is characterized in that: the material of described printing opacity is inorganic material or polymkeric substance; Described inorganic material is glass; Described polymkeric substance is polycarbonate, Polyvinylchloride, polystyrene or polyacrylic acid.
4. multi-wavelength stack fluorescent data-carrier store according to claim 1, is characterized in that: the fluorescent material of each layer can inspire fluorescence under same excitation wavelength.
5. multi-wavelength stack fluorescent data-carrier store according to claim 4, is characterized in that: described information storage medium is five layers; Have at least the fluorescent material in one deck information storage medium to adopt the one in following five kinds of fluorescent materials: { [Tb
2(MFDA)
2(HCOO)
2(H
2o)
6] H
2o}
n,
[Sm
3(MFDA)
4(NO
3)(DMF)
3]
n、
[Eu
3(MFDA)
4(NO
3)(DMF)
3]
n、
[Dy
2(PDA)
2(HCOO)(OH)(H
2O)]
n、
{[Cu
2(BPCA)(PPh
3)
2I
2]·
2CH
2Cl
2}
n。
6. multi-wavelength stack fluorescent data-carrier store according to claim 5, is characterized in that: on every layer of information storage medium, adopt respectively the one in five kinds of described fluorescent materials, and every layer is not identical.
7. the data access arrangement of the multi-wavelength stack fluorescent data-carrier store based on described in claim 1～6 any one, it is characterized in that: include claim, a side at described multi-wavelength stack fluorescent data-carrier store is provided with incident laser device, on multi-wavelength stack fluorescent data-carrier store, in fluorescent emission direction, is disposed with wave filter and detector; The filter wavelength of described filter plate is adjustable.
8. data access arrangement according to claim 7, it is characterized in that: in described wave filter, include filter plate, the number of filter plate is identical with the number of plies of information storage medium, and the wavelength that filter plate passes through is identical with the maximum wavelength of fluorescence inspiring of the fluorescent material of every layer.
9. the read method of the multi-wavelength stack fluorescent data-carrier store based on described in claim 1～6 any one, it is characterized in that: comprise the steps, the 1st step, on multi-wavelength stack fluorescent data-carrier store, send incident laser, make fluorescent material inspire fluorescence, by wave filter, fluorescence is carried out to filtering again, the fluorescence that fluorescent material on one deck is wherein produced sees through, then by detector, the fluorescence seeing through is detected; Change the irradiation position of incident laser on above-mentioned one deck, and repeat the step of filtering and detection; The filter wavelength of the 2nd step, change wave filter, the fluorescence that another layer of upper fluorescent material sent sees through, and repeating step 1, obtains data.
10. the application of fluorescent material in optical memory, described fluorescent material is
{[Tb
2(MFDA)
2(HCOO)
2(H
2O)
6]·H
2O}
n、
[Sm
3(MFDA)
4(NO
3)(DMF)
3]
n、
[Eu
3(MFDA)
4(NO
3)(DMF)
3]
n、
[Dy
2(PDA)
2(HCOO)(OH)(H
2O)]
n、
{ [Cu
2(BPCA) (PPh
3)
2i
2]
2cH
2cl
2}
nin at least one; Preferably 5 kinds.
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| CN111524539A (en) * | 2020-04-01 | 2020-08-11 | 华中科技大学 | Super-resolution multi-dimensional optical storage method for realizing wavelength multiplexing |
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