CN104134448B - Multi-wavelength stack fluorescent data storage and its element manufacturing and read method - Google Patents
Multi-wavelength stack fluorescent data storage and its element manufacturing and read method Download PDFInfo
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Abstract
The invention discloses multi-wavelength stack fluorescent data storage and its element manufacturing and read method, belong to optical information memory technology.Thinking of the invention is using incident laser radiation on the Information Level for continuing of fluorescent memory, fluorescence signal to be produced when the fluorescent media energy absorption in the groove of the upper information bit of described information layer.The fluorescence signal, because it is different from other wavelength, finally leaches the wavelength in addition to the wavelength of fluorescence that the Information Level for being continued is excited using a filter plate, it is ensured that CCD receives the fluorescence signal of the Information Level that only continues in ccd detector；After one layer of information is run through, the corresponding filter plate of Information Level for continuing is switched to using computer controls wave filter.Ensure that fluorescence signal that CCD is received only is continued the signal of Information Level, and the purpose of layer is selected so as to reach.
Description
Technical field
The invention belongs to optical information memory technology, and in particular to the making of fluorescent material and memory reading method.
Background technology
Optical data storage techniques such as CD and DVD are obtained extensively in audio-video and computer data field of storage
Application.Optical information memory technology is to irradiate medium using laser, makes medium that thing to occur by the interaction of laser and medium
Reason, chemical change, the technology that information Store is got off.To adapt to the development need of computer technology, the data of storage device are deposited
The annual speed with 60% of reserves increases, and current people are further improving the memory capacity of memory, existing rank by every means
The widely used method for increasing capacity of memory device of section is the storage density reality for increasing considerably magnetic and optical record medium
Existing.
In optical recording field, the capacity for increasing information carrier is trend, the side for increasing data capacity studied
Method includes using many Information Levels, such as DVD（Digital video disc）May include two Information Levels.Multiplayer optical disk by Philips and
IBM Corporation proposes, but for multiplayer optical disk, the CD of existing multilayer is due to detecting the coherence of light beam to multiplayer optical disk
Interference, scattering and internal layer cross (talk) etc. is produced to be difficult to differentiate between signal [Yang Shuguang, Zhang Fumei multilayered fluorescent the CDs-C3D for receiving
Technology probes into [J] optical discs, 2000（5）：19-23].
Therefore for Multilayer Memory, the enough information content of storage, response are not only required to and are required very rapidly, also
Signal to noise ratio high, existing technology is difficult to realize.
The content of the invention
Present invention aim at the memory capacity and response speed and data antijamming capability that further improve memory.
According to an aspect of the present invention, a kind of multi-wavelength stack fluorescent data storage, includes at least two layers of letter
Breath storage medium, is provided with the groove comprising fluorescent material on described information storage medium；On every layer of information storage medium
Fluorescent material after excitation each other have different emission peaks；Described information storage medium is the material of printing opacity.
Used as improvement, the fluorescent material on every layer of information storage medium has different maximums each other after excitation
Emission peak.
Used as improvement, the fluorescent material on each layer is same；Fluorescent material between layers is mutually different.
Used as improvement, the fluorescent material of each layer can inspire fluorescence under same excitation wavelength.
Used as improvement, described information storage medium is five layers.
Used as improvement, the fluorescent material at least one layer information storage medium is using in following five kinds of fluorescent materials
Kind：
{[Tb2(MFDA)2(HCOO)2(H2O)6]·H2O}n、
[Sm3(MFDA)4(NO3)(DMF)3]n、
[Eu3(MFDA)4(NO3)(DMF)3]n、
[Dy2(PDA)2(HCOO)(OH)(H2O)]n、
{[Cu2(BPCA)(PPh3)2I2]·2CH2Cl2}n。
As improvement, the one kind in five kinds of described fluorescent materials, and every layer are respectively adopted on every layer of information storage medium
It is different from.
Used as improvement, described excitation wavelength is 380 nm.
Used as improvement, the material of described printing opacity is inorganic material or polymer.
Used as improvement, described inorganic material is glass；Described polymer is makrolon, polyvinyl chloride, polyphenyl second
Alkene or polyacrylic acid.
According to another aspect of the present invention, a kind of multi-wavelength stack fluorescent DAA, includes above-mentioned many
Wave stack fluorescent data storage device, incident laser is provided with the side of described multi-wavelength stack fluorescent data storage
Device, wave filter and detector are disposed with fluorescent emission direction on multi-wavelength stack fluorescent data storage；Described
The filter range of wave filter is adjustable.
As improvement, filter plate, the number of filter plate and the number of plies of information storage medium are included in described wave filter
Identical, the maximum wavelength of fluorescence for inspiring of the wavelength that filter plate passes through and every layer of fluorescent material is identical.
According to another aspect of the present invention, a kind of multi-wavelength stack fluorescent method for reading data, comprises the following steps：The
1 step, to incident laser is sent on multi-wavelength stack fluorescent data storage, fluorescent material is inspired fluorescence, then by filtering
Device is filtered to fluorescence, and the fluorescence for producing the fluorescent material on a layer therein is passed through, then by detector to transmission
Fluorescence is detected；Change irradiation position of the incident laser on above-mentioned one layer, and repeat the step of filtering and detect；2nd
Step, the filter wavelength for changing wave filter, pass through the fluorescence that fluorescent material sends on another layer, and repeat step 1 obtains data.
According to another aspect of the present invention, application of the fluorescent material in optical memory, described fluorescent material is
{[Tb2(MFDA)2(HCOO)2(H2O)6]·H2O}n、
[Sm3(MFDA)4(NO3)(DMF)3]n、
[Eu3(MFDA)4(NO3)(DMF)3]n、
[Dy2(PDA)2(HCOO)(OH)(H2O)]n、
{[Cu2(BPCA)(PPh3)2I2]·2CH2Cl2}nIn at least one.
As improvement, preferably 5 kinds.
Compared to existing technology, technical scheme has the advantages that：
Though the 1, the horizontal resolution of each layer of fluorescent multi-layer storage has certain limitation, single layer of memory is contrasted,
Fluorescent multi-layer storage amount of storage is many more than single layer of memory.
2nd, light stimulus is conducive to, the fluorescent material that the present invention is used contrasts existing fluorescent material（Such as aromatic series carbon hydrogenation
Compound）With fluorescence conversion efficiency very high, be conducive to the reading of memory signals fast and stable.Fluorescent material good stability,
High temperature and for a long time deposit after will not fail, can the resting period long, can repeatedly read.
3rd, multi-wavelength stack fluorescent memory of the present invention reaches the purpose for selecting layer using multiple wavelengths filter, and existing
Fluorescent multi-layer storage selects layer using laser variable-focus technology, and this memory is with signal to noise ratio higher.
Brief description of the drawings
Fig. 1 is the multi-wavelength stack fluorescent memory construction schematic diagram shown in specific embodiment, wherein：1 is incidence
Laser, 2 be ccd detector, 3 be the wave filter of different fluorescence bands, the Information Level of 4 memories, 6 exciting for the Information Level that continues
The fluorescence for going out.
Fig. 2 is the multi-wavelength stack fluorescent memory operation schematic diagram shown in specific embodiment, wherein：1 is incidence
Laser, 2 be ccd detector, 3 for different wavelength of fluorescence wave filter, 4 be Information Level, 5 be other information layer inspire it is glimmering
Light, 6 are that the continue fluorescence that inspires, 7 of Information Level are letter in the light that Information Level is reflected and scattering is produced, 8 for incident laser
Cease the unit and fluorescence unit of layer.
Fig. 3 is the fluorescence emission spectrum of complex, and 1~5 curve indicated in figure refers respectively to complex 1~5.
Specific embodiment
1 and Fig. 2 is described in detail to technical scheme below in conjunction with the accompanying drawings：
Thinking of the invention be using incident laser radiation on the Information Level for continuing of fluorescent memory, work as described information
On layer fluorescence signal is produced during fluorescent media energy absorption in the groove of information bit.The fluorescence signal, because it is different from it
His wavelength, is finally leached in addition to the wavelength of fluorescence that the Information Level for being continued is excited in ccd detector using a filter plate
Wavelength, it is ensured that CCD receives the fluorescence signal of the Information Level that only continues.
The structure of fluorescent memory device of the invention is as shown in figure 1, including incident laser device 1, ccd detector 2, many ripples
Wave filter 3 long, the Information Level 4 for scribbling Fluorescence Fluorescence medium.Incident laser device 1 is for launching corresponding sharp to Information Level
Light, its position can not do specific restriction, be generally the top for being located at Information Level, and those skilled in the art know
As long as the laser orientation information layer surface for being projected and the light directive detector that reflection can be made.Laser is on an information layer
Excite after fluorescent material, produce fluorescence, filter plate 3 is provided with the injection direction of fluorescence, be provided with the rear portion of filter plate 3
Ccd detector 2, for receiving fluorescence signal.
The Information Level 4 of fluorescent multi-layer storage is by transparent inorganic material（Such as glass）Or polymer（Such as poly- carbonic acid
Ester, polyvinyl chloride, polystyrene, benzene olefin(e) acid）Deng making, at least two-layer of Information Level 4, or multilayer is (with 5 in the present embodiment
As a example by layer).Using makrolon as Information Level making material, the major part of memory is by multiple with reeded Information Level
4 are constituted, and it is looked like from level to level with groove film, and these grooves are used for arranging fluorescence labeling information.In the present embodiment,
All be filled with fluorescent material in groove on each layer of Information Level, in order that detection process more facilitates, optimal mode be
Same fluorescent material is inserted in same layer, and the fluorescent material inserted on different layers is mutually different.
The manufacturing technology scheme of fluorescent material of the invention below is described in detail：Various different excitation waves in the present invention
The making of fluorescent material long, is the nitrate using the organic ligand with different fluorescent characteristics with rare earth metal, by molten
The hot method of agent carries out complexation reaction and is prepared.And by changing two kinds of doping ratios of organic ligand, so as to realize complex
The gradual change of fluorescence emission spectrum.
The part of use is as follows：
{[Tb2(MFDA)2(HCOO)2(H2O)6]·H2O}n(complex 1)
[Ln3(MFDA)4(NO3)(DMF)3]n(it is complex 2 when Ln is Sm；It is complex 3 when Ln is Eu)
[Dy2(PDA)2(HCOO)(OH)(H2O)]n(complex 4)
{[Cu2(BPCA)(PPh3)2I2]·2CH2Cl2}n(complex 5)
Wherein, H2MFDA is 9,9- dimethyl fluorene -2,7- dicarboxylic acids, H2PDA is that, to benzene diacrylate, BPCA is two (pyrroles
Pyridine -4- formaldehyde) nitrine, PPh3It is triphenylphosphine；DMF is DMF.
Synthesis step is as follows：
The synthesis of complex 1
By 9,9- dimethyl fluorene -2,7- dicarboxylic acids H2MFDA (0.1 mmol, 28.2 mg), Tb (NO3)3·6H2O
(0.1 mmol, 45.2 mg) and DMF（DMF）(5 mL), EtOH (2 mL), H2O (1 mL) is mixed
Close, be fitted into stainless steel cauldrons of 25 mL with polytetrafluoroethyllining lining, be put into baking oven, the constant temperature 3 at a temperature of 120 °C
My god, room temperature is naturally cooled to, filter, obtain colourless bar-shaped crystal, absolute ethanol washing, vacuum drying.
The synthesis of complex 2 and 3
Synthetic method of the complex 2 with 3 is similar, and the synthesis of complex 2 is only described herein.By 9,9- dimethyl fluorene -2,
7- dicarboxylic acids（H2MFDA）(0.1 mmol, 28.2 mg), Sm (NO3)3·6H2O (0.1 mmol, 44.4 mg) and N, N-
Dimethylformamide（DMF）(5 mL), EtOH (2 mL), H2O (1 mL) mixes, and loads 15 mL with polytetrafluoroethylene (PTFE)
In the stainless steel cauldron of lining, baking oven is put into, constant temperature 3 days at a temperature of 80 °C naturally cool to room temperature, filtered, obtain nothing
The bar-shaped crystal of color, absolute ethanol washing, vacuum drying.
The synthesis of complex 4
Will be to benzene diacrylate（H2PDA）(0.2 mmol, 43.6 mg), Dy (NO3)3·6H2O (0.2 mmol,
91.4 mg) and DMF (5 mL), H2O (5 mL) mixes, and loads stainless steel cauldrons of 15 mL with polytetrafluoro tetraene liner
In, baking oven is put into, constant temperature 3 days at a temperature of 160 °C naturally cool to room temperature, filtering, obtain colourless acicular crystal, nothing
Water-ethanol is washed, vacuum drying.
The synthesis of complex 5
In the case where continuously stirring, the cuprous iodide powder of 38.1mg (0.2mmol) is added to and contains 104.9mg
In the dichloromethane solution of (0.4mmol) triphenylphosphine, stirring obtains colourless clear liquid after about one hour.Now add 21mg
(0.1mmol) part BPCA, while continuing to stir until solution is changed into faint yellow clear liquid.Filtering, filtrate stands, and obtains after a few days
Light yellow crystal, absolute ethanol washing, vacuum drying.
The structure of complex is：
The structure of complex 1
Contain a Tb being located on diad in the asymmetric cell of complex 13+Ion, 1 point 5 MFDA part
（C (8) is on another diad）, half formate ion, 1 point 5 water of coordination molecule and a quarter are free
Hydrone.Tb (1) and 8 oxygen atom ligands, 4 oxygen therein come from 4 MFDA parts, and 2 oxygen come from 2 hydrones, most
Latter two oxygen comes from hydrone or formate ion.O (1), O (2), C (1)-C (8) are located approximately in approximately the same plane, its
The degree that middle C (3) atom deviates the least square plane determined by these atoms is maximum, is 0.0408.MFDA parts are usedμ 4The mode of bridging is connected to four Tb ions, wherein its each carboxyl oxygen atom each with a Tb3+Ion is connected.Tb3+
Ion existsbcArranged in the form of linear queue in face, two Tb adjacent in each linear queue3+Ion is almost common by two
Two carboxyl doube bridges connection in the MFDA parts of plane, forms the bar-shaped secondary structure units of one-dimensional Tb-O-C.Tb-O-C
Bar-shaped secondary structure unit is by 9, the 9- dimethyl fluorenes part in MFDA parts respectively along [011] and [0-11] direction bridge
The bar-shaped packed structures of three-dimensional pcu types are even formed, there is the one-dimensional water chestnut occupied by formate ion and hydrone in structure
Shape duct.By calculating, in the complex 1 gone after solvent, 768.57 are possessed in each structure cell3To accommodate other molten
The cavity volume of agent molecule, accounts for the 29% of unit cell volume.
The structure of complex 2 and 3
Complex 2 and 3 is isomorphism, and the structure of complex 2 is only described herein.Included in the asymmetric cell of complex 2
1 point 5 Sm (III) ion, two MFDA2-Part, half NO3-, 1 point 5 DMF solvent molecule of coordination.Sm (1) from
The ligancy of son is seven, and coordination atom is respectively an oxygen original from six the six of MFDA parts oxygen atoms and DMF molecules
Son.The ligancy of Sm (2) ion is also seven, coordination atom be respectively from four the four of MFDA parts oxygen atoms, one it is double
Two oxygen atoms and an oxygen atom of DMF molecules of the nitrate ion of tooth chelating.MFDA parts are usedμ 4The mode of bridging
Four Sm ions are connected to, wherein each carboxylate oxygen atoms connect a Sm ion respectively.Sm ions are first by MFDA parts
Carboxyl connects into the bar-shaped secondary building units of the Sm-O-C (SBU) that one-dimensional edge [101] direction extends.The 9,9- of MFDA parts
Dimethyl fluorene unit further couples together two adjacent bar-shaped secondary building units of Sm-O-C to form ladder, wherein
Step is rearranged by the 9,9- dimethyl fluorene units alternatelies of two kinds of different directions.The bar-shaped secondary building units of each Sm-O-C
The adjacent bar-shaped secondary building units of Sm-O-C of four additional on connection (1-1-1) and (11-1) crystal face, so as to form three
The bar-shaped packed structures of the pcu types of dimension, and there is openings of sizes to be about 9.3 × 5.1 in [101] direction2Rhombus duct,
DMF molecules are present in duct as coordination guest molecule.By calculating, in the complex 2 gone after solvent, each structure cell
In possess 1183.03The cavity volume for accommodating other solvent molecules, account for the 28.7% of unit cell volume.
The structure of complex 4
Containing two kinds of Dy ions of crystallography independence in the asymmetric cell of complex 4, a complete PDA part, two
The PDA parts of individual half, a formate ion, a hydroxide ion and a hydrone.Formate ion is by solvent
The decomposition of DMF is obtained in thermal process reactor.Dy1 centers and 9 oxygen atom ligands, 5 oxygen atoms therein come from 4 PDA
Part, 2 oxygen come from a formate ion, and 1 oxygen atom of the oxygen from hydroxyl, last 1 oxygen comes from hydrone.Dy1
The coordination environment at center is the anti-quadrangular of single cap of distortion.Dy2 centers are also and 9 oxygen atom ligands, 6 oxygen atoms therein
From 5 PDA parts, 2 oxygen come from formate ion from two oxygen atoms of hydroxyl, 1 oxygen.The coordination ring at Dy2 centers
Border is three cap triangular prisms of distortion.O3 from part PDA, O5, O7 and from hydroxide ionμ 3- O10 is one
Dy1 ions are coupled together with two Dy2 ions, form a Dy for the incomplete similar cubane type of distortion3O4Metal oxygen
Cluster.These Dy3O4Cluster is by sharing cube summit Shang Dy2 centers and other Dy3O4Cluster is connected, material is thus formed alongb
The one-dimensional rod-like secondary building unit that axle extends, O11 therein is further connected to adjacent Dy3O4In Cu Dy1 centers and Dy2
The heart.These bar-shaped secondary building units existabIt is arranged in parallel with each other in face, material is thus formed the structure of two-dimensional layer.Rod in layer
Do not connected further between shape secondary building unit.However, the bar-shaped secondary building unit of interlayer is by below PDA parts
The mode in face is connected with other bar-shaped secondary building units：Each bar-shaped secondary building unit with from different layers other four
The bar-shaped secondary building unit of individual arest neighbors is connected, and from adjacent upper strata, in addition two under adjacent for two of which
Layer.Therefore, these bar-shaped secondary building units are connected by four bar-shaped secondary building units of PDA parts and other, so that shape
Into the bar-shaped packed structures of pcu types.
The structure of complex 5
X-ray single crystal diffraction result shows, containing a monovalent metal copper ion in the asymmetric cell of complex 5, one
Individual iodide ion, a triphenylphosphine molecule, the half and a dichloromethane solvent molecule of part BPCA molecule.Complex
(PPh is included in 53)2Cu2(µ-I)2Unit.This element forms an one-dimensional chain through part BPCA bridgings.In complex 5, one
The coordination geometric configuration of valency copper ion is the tetrahedral structure of mild distortion.In complex 5, univalent copper ion is four-coordination,
Coordination atom is respectively the nitrogen-atoms on one of pyridine ring of part BPCA, on triphenylphosphine a phosphorus atoms and two
Iodine atom.There is Cu in complex 52I2Double-core copper bunch, wherein the distance between copper copper is 2.9864 (16), this explanation copper copper it
Between exist metallized metal interaction.
More synthesis of complex 1~4 can be referred to content is characterized《Luminescence rare earth metal-organic framework materials set
Meter synthesis and performance study》, Li Honghui, Nanjing Univ. of Posts and Telecommunications's master thesis, 2013.More synthesis of complex 5 and table
Levying content can refer to《Pyridine radicals schiff alkali, the synthesis of Cu (I) complex of the miscellaneous nitrogen ligand of phosphine mixture, structure and light spectrality
Matter research》, Zhou Xinhui, University Of Shantou's master thesis, 2006.
Fig. 3 is the room temperature solid emission spectrum of complex 1-5.Under the exciting of the exciting light that excitation wavelength is 380 nm,
Complex 1 has maximum emission peak wide at 426 nm, and complex 2 has maximum emission peak wide at 436 nm, and pure
H2MFDA parts compare the red shift that there are about 20 nm or so, it is possible to determine that the transmitting of complex 1 and 2 is the MFDA parts by being coordinated
π-π * transition produce.Can be seen from the emission spectrum of complex 3 in 581 nm, 592 nm, 615 nm（At 620 nm
There is an acromion）, there is emission peak at 654 nm and 703 nm, these emission peaks can belong to Eu3+The feature hair of ion
Penetrate：5D0→7FJ(J = 0, 1, 2, 3, 4).In complex 3, part H2The strong blue emission of MFDA is wholly absent,
Complex illustrates strong Eu3+The red emission of ion characteristic, this explanation MFDA part gives Eu energy efficient transfer3+
Ion.Complex 4 shows strong blue emission, and the luminescent spectrum curve with part is similar, and its emission maximum is in 468 nm
(have two acromions at 448 nm and 485 nm), 34 nm of red shift compared with pure part, the luminous of complex 4 should be
Produced by the π-π * transition of the PDA parts being coordinated.Complex 5 has an emission maximum at 515nm, and this launch wavelength is just
Benefit is within the scope of the launch wavelength of part BPCA, so it is possible thereby to judging that complex 5 is emitted as part at 515nm
Caused by the internal electron transition (IL) of BPCA.Complex 5 also has the weaker emission peak of an intensity, comprehensive ratio at 590nm
Compared with the emission spectrum of ligands and complexes, it is concluded that the transmitting of this wave band may be from part to (LMCT) of metal or
Metal is to caused by (MLCT) electron transition of part.
The making of fluorescent multi-layer storage, memory of the invention makes basic with the preparation method of common CD and DVD
Unanimously, the present invention is made using hot-die pressurization.In this tableting processes, first, metal form is at high temperature to poly- carbonic acid
The hot pressing of ester thin plate produces groove, then, recycles fluorescence dye liquor to fill up the groove of information bit, and full-filling is carried out in a spiral manner.
After solution paint solidification, Information Level from level to level is allowed to be superimposed together.
The information read method of fluorescent multi-layer storage of the invention such as Fig. 2, comprises the following steps that：
1）Incident laser excites fluorescence：The laser that incident laser 1 sends continues by lens into a certain layer of memory
Information Level, and scanned along the in-plane of Information Level in the Information Level for being continued, when laser scanning is to being filled with the recessed of fluorescent media
When in groove, the energy absorption of unit and fluorescence unit 4 produces fluorescence signal, so also just generates information light.
2）Information light-receiving：After described information light is produced, before being received by ccd detector 2, a metafiltration ripple can be first passed through
Piece 3, the wavelength of fluorescence that different Information Levels are given off is different, the wavelength that corresponding filter plate passes through and each layer Information Level
Excite wavelength of fluorescence consistent, the present invention uses 5 layers of Information Level, each layer of fluorescent material arrangement mode of full-filling, top first
The Information Level of layer uses { [Tb2(MFDA)2(HCOO)2(H2O)6]H2O}n, the second layer [Dy2(PDA)2(HCOO)(OH)(H2O)]n、
Third layer { [Cu2(BPCA)(PPh3)2I2]2CH2Cl2The 4th layer of [Ln of n3(MFDA)4(NO3)(DMF)3]n (when Ln is Sm, be with
Compound 2 is the 4th layer；When Ln is Eu, be complex 3 be layer 5), for avoid irradiation continue Information Level when can be irradiated to it
His aspect and excite other wavelength (such as the fluorescence 5 for inspiring of the other information layer shown in figure) and incident laser reflection with
The influence of scattering (such as the light 7 produced in Information Level reflection and scattering of the incident laser shown in figure), information light can first lead to
Wave filter 3, is irradiated on the photosurface of CCD 2 afterwards, realizes the reception of information light.The filter wavelength of wave filter 3 should be
Can adjust, it can be adjusted to consistent with the launch wavelength of each layer of fluorescent material, and it includes in the present embodiment
There are 5 filter plates, launch wavelength of each filter plate respectively with this 5 kinds of fluorescent materials is consistent, when needing to read a certain layer
During wavelength, the filter state of wave filter 3 is switched to by the filter filter disc by the method for changing filter plate.In general, only
Ensure that the emission peak of fluorescent material between every layer is different, it is possible to by select suitable wave filter by need to read that
The transmitting fluorescence of one layer of fluorescent material is leached, but for the effect for improving filter filter and read, is desirable to ensure every layer glimmering
The maximum emission peak of luminescent material can be different, can thus improve the effect of filtering, if it is possible to make the maximum ripple for finding peak
Interval between length is bigger, it becomes possible to further improves filtering and reads effect.
3）The acquisition and identification of information：Illuminating bundle is receiving receipts in the information light that the Information Level for continuing is produced by CCD2
When, information light have the Information Level that continues fluorescence signal and from other information layer interference signal and incident laser produce it is anti-
Penetrate and scattered light signal, by a metafiltration wave plate before being received, filter plate is to allow the filter plate for only allowing specific wavelength to pass through,
426nm filter plates, 436nm filter plates, 468nm filter plates, 515nm filter plates, 654nm filtering are included in the present embodiment respectively
Piece；Memory from top to bottom, the wavelength of fluorescence that different Information Level fluorescent materials are excited be 426nm, 436nm, 468nm, 515nm,
654nm is arranged.When laser light incident to the Information Level that continues, filter plate switches to the filter plate corresponding with this layer of wavelength of fluorescence.It is logical
Cross the information light that filter plate is followed by being subject to only to continue the fluorescence signal of Information Level where data, so as to reach jamproof effect
Really.With reference to 5 kinds of above-mentioned analyses of the characteristics of luminescence of fluorescent material, also had using this 5 kinds of fluorescent materials in this memory
Following advantage：This 5 kinds of fluorescent materials can launch fluorescence, and fluorescence emission spectrum under the nm of same excitation wavelength 380
Emission peak all there is obvious difference, and maximum emission peak each other can have obvious dislocation, and this can just make only
Using just can simultaneously making with a branch of excitation line whole 5 layers of fluorescent memory launch fluorescence, and fluorescence can significantly by
Wave filter is filtered respectively, simplifies operation.
4）The continuous reading of single-layer information：Computerized control the movement of laser light incident device and the rotation of memory so that
The laser is moved to edge at the center of memory along horizontal X-direction, reads all information of individual layer.
5）Select layer：It is to select layer using filter plate 3 that the present invention selects layer, after one layer of information is run through, is filtered using computer controls
Ripple device switches to the corresponding filter plate of the Information Level for continuing.Ensure that fluorescence signal that CCD2 is received only continues the letter of Information Level
Number, the purpose of layer is selected so as to reach.
6）Multi-layer information contact reads：Repeat the above steps 2）To step 5）Process, until the multilayer that need to will be continued is glimmering
Untill the information of optical memory reads.
The explanation of above example is only intended to help and understands the method for the present invention and its core concept.It should be pointed out that right
For those skilled in the art, under the premise without departing from the principles of the invention, the present invention can also be carried out
Some improvement and modification, these are improved and modification is also fallen into the protection domain of the claims in the present invention.To disclosed implementation
The described above of example, enables professional and technical personnel in the field to realize or uses the present invention.Various modifications to these embodiments
Will be apparent for those skilled in the art, generic principles defined herein can not depart from this
In the case of the spirit or scope of invention, realize in other embodiments.Therefore, the present invention is not intended to be limited to illustrated herein
These embodiments in, but can apply to meet the broader model consistent with principles disclosed herein and features of novelty
Enclose.
Claims (11)
1. a kind of multi-wavelength stack fluorescent data storage, it is characterised in that：Include at least two layers of information storage medium, institute
The groove comprising fluorescent material is provided with the information storage medium stated；Fluorescent material on every layer of information storage medium is swashing
There is different emission peaks each other after hair；Described information storage medium is the material of printing opacity；
Fluorescent material at least one layer information storage medium is using the one kind in following five kinds of fluorescent materials：{[Tb2
(MFDA)2(HCOO)2(H2O)6]•H2O}n、
[Sm3(MFDA)4(NO3)(DMF)3]n、
[Eu3(MFDA)4(NO3)(DMF)3]n、
[Dy2(PDA)2(HCOO)(OH)(H2O)]n、
{[Cu2(BPCA)(PPh3)2I2]•2CH2Cl2}n。
2. multi-wavelength stack fluorescent data storage according to claim 1, it is characterised in that：Every layer of information Store is situated between
Fluorescent material in matter has different maximum emission peaks each other after excitation.
3. multi-wavelength stack fluorescent data storage according to claim 1, it is characterised in that：The material of described printing opacity
It is inorganic material or polymer.
4. multi-wavelength stack fluorescent data storage according to claim 3, it is characterised in that：Described inorganic material is
Glass.
5. multi-wavelength stack fluorescent data storage according to claim 3, it is characterised in that：Described polymer is poly-
Carbonic ester, polyvinyl chloride, polystyrene or polyacrylic acid.
6. multi-wavelength stack fluorescent data storage according to claim 1, it is characterised in that：The fluorescent material of each layer exists
Fluorescence can be inspired under same excitation wavelength.
7. multi-wavelength stack fluorescent data storage according to claim 6, it is characterised in that：Described information Store is situated between
Matter is five layers.
8. multi-wavelength stack fluorescent data storage according to claim 7, it is characterised in that：Every layer of information storage medium
On one kind in five kinds of described fluorescent materials is respectively adopted, and every layer is different from.
9. a kind of DAA of the multi-wavelength stack fluorescent data storage based on described in any one of claim 1~8,
It is characterized in that：The side of described multi-wavelength stack fluorescent data storage is provided with incident laser device, it is folded in multi-wavelength
On layer fluorescent data storage device wave filter and detector are disposed with fluorescent emission direction；The filtering ripple of described wave filter
Length is adjustable.
10. DAA according to claim 9, it is characterised in that：Filter plate is included in described wave filter,
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 inspired with every layer of fluorescent material
Maximum wavelength of fluorescence it is identical.
A kind of 11. read methods of the multi-wavelength stack fluorescent data storage based on described in any one of claim 1~8, its
It is characterised by：Comprise the following steps that the 1st step, to incident laser is sent on multi-wavelength stack fluorescent data storage makes phosphor
Material inspires fluorescence, then fluorescence is filtered by wave filter, and the fluorescence for producing the fluorescent material on a layer therein is saturating
Cross, then the fluorescence for passing through is detected by detector；Change irradiation position of the incident laser on above-mentioned one layer, lay equal stress on
The step of multiple filtering and detection；2nd step, the filter wavelength for changing wave filter, make the fluorescence that fluorescent material sends on another layer saturating
Cross, repeat step 1, obtain data.
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