CN101366086A - Optical storage medium and optical device for writing, deletion and reading of data - Google Patents

Optical storage medium and optical device for writing, deletion and reading of data Download PDF

Info

Publication number
CN101366086A
CN101366086A CNA2006800227926A CN200680022792A CN101366086A CN 101366086 A CN101366086 A CN 101366086A CN A2006800227926 A CNA2006800227926 A CN A2006800227926A CN 200680022792 A CN200680022792 A CN 200680022792A CN 101366086 A CN101366086 A CN 101366086A
Authority
CN
China
Prior art keywords
optical storage
optical
layer
storage medium
radiation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA2006800227926A
Other languages
Chinese (zh)
Inventor
瓦季姆·吉约吉耶维奇·基伊科
弗拉基米尔·尼古拉耶维奇·布里亚克
阿列克谢·B·叶戈罗夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Invt Spol S R O
Original Assignee
Invt Spol S R O
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Invt Spol S R O filed Critical Invt Spol S R O
Publication of CN101366086A publication Critical patent/CN101366086A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2403—Layers; Shape, structure or physical properties thereof
    • G11B7/24035—Recording layers
    • G11B7/24038—Multiple laminated recording layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0045—Recording
    • G11B7/00455—Recording involving reflectivity, absorption or colour changes
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0055—Erasing
    • G11B7/00552—Erasing involving colour change media
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/128—Modulators
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1384—Fibre optics
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/14—Heads, e.g. forming of the optical beam spot or modulation of the optical beam specially adapted to record on, or to reproduce from, more than one track simultaneously
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
    • G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)

Abstract

The invention concerns an optical storage medium and a device for writing, deletion and reading of the optical storage medium data. The optical storage medium consists of a multi- layer structure of alternating polymeric layers doped with a photochromic substance and layers undoped with the photochromic substance. The undoped layer serves as a waveguide, while writing and deletion of data is realized by managed changes of the refraction coefficient in local areas by the effect of radiating a suitable wavelength in the doped layers. Reading of data is realized by introducing the radiation of the reading wavelength into the waveguide layer of the optical storage medium without the photochromic medium and by detection of luminescence changes at places with a changed refraction coefficient in the optical storage medium layer with the photochromic material. The device for writing, deletion and reading of the optical storage medium data consists of a source of radiation of three wavelengths, an optical system for the transmission of radiation, an optical three-channel system for an independent radiation modulation, an optical system for radiation focusing for writing and deletion with a perpendicular and vertical movement towards the optical storage medium layers and of an optical system for the sideways illumination of the optical storage medium layers without the photochromic substance enabling the movement on a plane perpendicular to the optical storage medium layers without the photochromic material. The devices according to this invention may be used in all areas of computing technologies requiring storage of large amounts of data with the possibility to carry out their corrections. The devices may also be used for recording, storing and replaying of video and audio files.

Description

Optical storage media and being used to writes, the light device of deletion and reading of data
Technical field
The present invention relates to a kind of optical storage media and the light device that is used for optical storage medium data is write, deletes and reads.These medium and equipment can be used in all spectra of the computing technique that requires storage to carry out the mass data of proofreading and correct possibly.Another possible use is record, storage and playback of video and audio file.
Background technology
No. 6728154 Patent publish of the U.S. on April 27th, 2004 a kind of optical storage media and manufacture process thereof.This three-dimensional medium is by matrix, and normally glass or crystal is a kind of, and rare earth ion is formed.Record is by being exposed to 10 8-10 17W/cm 2Laser 10 -10Second and realize.Because this exposure, rare earth ion forwards the state of fluorescing to.The ion fluorescence that information produces by the laser that is exposed to respective wavelength encourages reads.The defective of this solution comprises that requirement continues the superlaser radiation of very short time, and this can cause the reduction of information writing speed, and requires the accurate setting without any the laser beam position in the recording medium volume of grappling possibility.
In addition, No. 5268862 patent of the U.S. on Dec 7th, 1993 disclosed a kind of optical memory of three-dimensional.It normally is limited to the spirobenzopyran (spyrobenzopyran) in the three-dimensional polymer matrix based on photochromic material.This material has two kinds of stable status---spiro-pyrans (spyropyran) and merocyanine, and the conversion between the two is to be that the two-photon absorption of 532nm starts by wavelength.In this case, two laser beam are used for along radiant exposure on orthogonal two axles.In this way, realize the space orientation that the medium three-D volumes is interior: the conversion of photochromic material only occurs over just two light beam infalls.The photochromic material of another kind of form fluoresces under the radiation effect of 1064nm wavelength; Therefore, after being exposed to this radiation, can read the information that is write down by detecting the fluorescence position.Deletion is by integral body or this medium of spot heating, for example is exposed to that 2.12 μ m light beams realize.The defective of this method is similar to said method.Consider that ablation process is the fact of two-photon processing procedure, radiation source must can have high-peak power; Therefore, they are operated in low relatively frequency.Even two exact positions of orthogonal beam position in three-dimensional medium must be restricted to tens microns of several units with voxel dimensions, will reach sub-micron grade and focus on possibility.In addition, the homogenieity and the high optical property of dielectric surface had suitable requirement, this relatively easily satisfies under the situation of glass or quartzy matrix.On the other hand, for polymkeric substance, it is problematic reaching similar performance in the batch process, perhaps will cause the increase of cost.
In addition, No. 6045888 patent of the U.S. on April 4th, 2000 disclosed a kind of volume optical memory; It comprises the two-photon recording-member that is mixed with signal component, and this signal component comprises only fluorescigenic medium under " record " state that the single photon that reads radiation absorbs.Realize that in order to improve to be added to record is necessary, execution will be write down radiation and will be transformed into more short wavelength's parts.By means of the spatial modulation of writing light beam, the record of this medium is pressed " joint " take place.This recording medium has sandwich construction, wherein replaces to photaesthesia with to the insensitive layer of light well-balancedly; Their selection is by changing the storage media location in the space, perhaps realizing by the focusing length of regulating the read/write head.On behalf of propagation, photosensitive layer can " read " optical waveguide of wavelength radiation.The selection of the layer that in this case, is used to read realizes by radiation is focused on this one deck.Defective still is similar to those methods of having stated: the necessary substantial radiation source that uses that uses the two-photon medium and caused.The fluorescence that is used to read has limited voxel dimensions, thereby signal can have acceptable intensity in " reading " process.Although be used to select the waveguide of reading layer to solve the problem of the definite position of " reading " light beam, the separating layer that must pass half wavelength thickness by the light of this duct propagation.This will cause such fact, can only obtain the essential volume of fluorescent material originally with the one-tenth that increases horizontal (lateral) yardstick of volume elements, thereby cause the decline of recording density.
Must point out, all three-dimensional light memory devices based on photochromic medium of describing in the document are up to now all owned a defective relevant with physical characteristics together, this physical characteristics is based on the zone of the absorption index with change, and perhaps material changes the principle of canned data in the zone of fluorescence form into.This technology can focus of the light beam into the zone of the geometric scale of 0.5x0.5x0.5 (wavelength unit) at present, and writing light beam is lower than 100% to the energy conversion efficiency of photochromic effect.The representative value of the quantum yield of the photochromic compound of lasting stability approximately is 0.05-0.1[Yongchao Liang, Alexander S.Dvornikov, Peter M.Rentzepis, A novel non-destructible readout molecularmemory (a kind of survivable molecular memory of reading of novelty)---optical communication, 223 (2003), the 61-66 page or leaf], and the peaked absorption index of spectrum is no more than 1-2cm -1[Satoshi Kawata, Yoshimasa Kawata, Three-dimensional optical datastorage using photochromic materials (utilizing the three-dimensional light data storer of photochromic material)---Chem.Rev.2000,100,1777-1788 page or leaf].This has limited the essential level of signal of reading in the minimum voxel volume.In addition, must be pointed out, based on detecting peaked the reading in the process of spectrum by radiation, because the part of one-photon media generation information bit deletion, therefore must use light [Satoshi Kawata from the wavelength on absorption band border, Yoshimasa Kawata, Three-dimensional optical data storageusing photochromic materials (utilizing the three-dimensional light data storer of photochromic material)---Chem.Rev.2000,100, the 1777-1788 page or leaf].For this reason, even in fact voxel volume must increase by tens times of hundred times.In order to eliminate these deficiencies, equipment must be based on different information-reading methods.
The most promising method is likely based on the confocal microscope [A.Toriumi that detects different refraction coefficients in the photochromatic area that is write down, J.M.Herrmann, S.Kawata, Nondestructive readout of a three-dimensional photochromic optical memorywith a near-infrared differential phase-contrast microscope (using the survivable of three-dimensional photic variable color light storer of near infrared differential phasecontrast microscope to read)---optics letter, 22 volumes (1997), #8, the 555-557 page or leaf].Although it has high sensitivity and uses the possibility of one-photon media (use from the just in time detection of the radiation on border of absorption band, this can not cause this medium to forward another kind of state to from a kind of state), this method also can not be broken away from those defectives far away.Main problem results from described high sensitivity self, in order to add the irregularities of record phase place, can also detect any optics irregularities of the disc of the variable thickness about a half-wavelength that comprises the light that is used to read.Therefore, because this method requires to make the unaffordable economically dielectric disc with optical accuracy, got rid of the actual availability of this method.
Summary of the invention
Above-mentioned defective can be eliminated by the optical storage medium of being made up of the alternating layer of light transmissive material, and wherein ground floor is doped with photochromic material, does not have another layer of photochromic material to have n 1Refraction coefficient; Transmission substance on the photochromic matrix of mixing can exist for two kinds of forms: form I has n 2Refraction coefficient, form II has n 3Refraction coefficient, simultaneously described coefficient satisfies n 1N 2And n 1＜=n 3Relation, the conversion of photochromic material from form I to form II is because λ 1The effect of the optical radiation of wavelength and taking place, the conversion of photochromic material from form II to form I is because λ 2The effect of the optical radiation of wavelength and taking place.
Be used for the equipment that the multi-layer optical storage medium data write, delete and read and comprise three different wave length λ that separate 1, λ 2And λ 3Optical emitter, be respectively applied for the multi-layer optical storage medium data and write, delete and read, this optical emitter passes the triple channel modulating system of the independent radiation modulation that is used for different wave length, the λ that is used to write of optical storage medium data 1The optical radiation of wavelength and the λ that is used to delete 2The optical radiation of wavelength enters in the optical storage media parallel with vertical with the optical storage media layer by means of the light focus set, and the light focusing system guarantees to be used for the λ that optical storage medium data writes 1The optical radiation of wavelength and be used for the λ of optical storage medium data deletion 2The motion of the optical radiation of wavelength is parallel to the optical storage media layer, and will be used for λ that optical storage medium data is read 3The optical radiation of wavelength is introduced in the photosystem, to guarantee λ 3The motion of optical radiation on plane perpendicular to the optical storage media layer, the side direction exposure for each optical storage media layer of not having photochromic material is having refraction coefficient n 3The λ of incident on the zone of the optical storage media layer of the photochromic material that has changed 3The part of optical radiation from having the refraction coefficient n of change 3This zone come out, and fall in the focused light system, and continue to be forwarded to optics light demoder by optical splitter, transmission of electric signals is to be further processed there.
For being used for the equipment that the multi-layer optical storage medium data write, delete and read, can use reading that another parallel focused light system guarantees to walk abreast.
For being used for the equipment that the multi-layer optical storage medium data write, delete and read, as another kind of form, with the radiation source matrix with optical radiation light focusing system of the number in the corresponding source of number of the optical storage media layer that does not have photochromic material can be with acting on the λ that optical storage medium data reads 3The radiation source of wavelength, and these radiation sources are arranged by this way, each the optical storage media layer that does not promptly have photochromic material is all by a radiation source irradiates, and the exposure of each layer is switched by switch lambda in the radiation source matrix 3Realize in each source of the optical radiation of wavelength.
Be used for the equipment that the multi-layer optical storage medium data write, delete and read and use current driver to realize the motion of optical storage media according to of the present invention, for example rotation.
Optical storage media and be used for that equipment that optical storage medium data writes, deletes and read has solved because the independence of information signal on the initial medium capacity, construction problem with CD of maximum layer recording density, and the intensity that reads signal provides specially by the radiation power of " reading signal ", and with the concentration and the volume-independent of photochromic material.The improvement in performance of the optical storage media that proposes is that memory capacity be multiply by and is doped with the proportional factor of the number of plies of photochromic material.The disc that is proposed can make the capacity of movable storage medium increase hundreds of Gb.
The efficient of the disc that proposes is very high.This realizes by following aspect:
A) expansion is used for the possibility (single photon, the photic electrochromic compound of two-photon) of the medium grade of active layer
B) only read-delete-the almost unlimited number of the recording layer of the focusing actual grade restriction of the optical lens of writing system
C) the low relatively requirement of surface optics aspect of performance of homogeneous media
D) eliminated and read the crosstalk effect between each layer in the process.
Advantage according to equipment of the present invention is relevant with its essential characteristic, has introduced the waveguiding structure of the photochromic material that has significantly different refraction coefficients between its two kinds of steady state (SS)s.
Technically, this result by by therein with the form recorded information of the volume elements field of refractive index with change, create waveguiding structure in the passive state medium that two-layer photochromic material circle separates and obtain.This passive layer with waveguiding structure is shone with interleaved mode by the light source from its side.Light is by this duct propagation, and scattering on the volume elements with the variation in refractive of inducting.
In Science and Technology document source book, also there be not the optical storage media of discovery based on this waveguiding structure, this waveguiding structure is formed by comprising between photochromic medium two-layer the passive state material layer, and the refraction coefficient of described photochromic material is changing when another kind is changed from a kind of isomeric form.
According to the solution of light, the feasibility of proposition equipment is checked in theory, and tested by test by (passage) its refractive index optical problem of confusing waveguide on the border.In the framework of described method, the validity of the base attribute of the technical goal of proposition equipment solution is confirmed in order to realize.
The equipment that writes, deletes and read that is used for the multi-layer optical storage medium data according to the present invention uses existing DVD driver to drive the motion (rotation) of optical storage media; Therefore, industry is used not to be needed the structure of these drivers is carried out the material change, and only is its expansion.The industry use can be by realizing with the three-wavelength unit or with single wavelength reading unit that the set of three unit substitutes so far, and the essential structure principle of adjusting and register system will remain unchanged.
Compare with similar devices, make according to the equipment of being used for data and writing-delete of use multi-layer optical storage medium of the present invention-the read needs top technology that is used for producing storer specially not with optical device quality.Can infer according to the batch process cost of optical storage media of the present invention and can compare with the production cost of common CD or DVD.It also is possible that the techniques of mass production flow process of use normal disc is produced the multilayer disc that has write down.
Description of drawings
To carry out more detailed illustrating to the present invention in the accompanying drawings.
Fig. 1 shows the layer of single face and double-sided multi-layer optical storage media and arranges;
Fig. 2 a shows the exposure synoptic diagram of each the optical storage media layer that does not have photochromic material;
Fig. 2 b shows the synoptic diagram that optical storage medium data writes, deletes and reads;
Fig. 3 shows form with three-wavelength optical emitter, is used for the block scheme of the equipment that optical storage medium data writes, deletes and read;
Fig. 4 shows the λ that wherein is used for data read 3The optical emitter of wavelength is by the form of forming with the source matrix of the number in the source of the cd layer number equal number that does not have photochromic material, is used for the block scheme of the equipment that optical storage medium data writes, deletes and read.
Embodiment
In the example implementation, optical storage media has the form of multiplayer optical disk, and this multiplayer optical disk is made up of the γ and the α layer that mix with photochromic material and the β layer that do not have a photochromic material, wherein, γ and α layer have n when this photochromic material is in state I 2Refraction coefficient, when this photochromic material is in state I I, have n 3Refraction coefficient, and the β layer has n 1Refraction coefficient, simultaneously these refraction coefficients satisfy following relation:
n 1N 2And n 1＜=n 3(1)
Has λ 3The radiation that is used for data read of wavelength be absorbed in all the layer all be negligible.These layers periodically alternately pile up.The thickness of β layer is 10-100 μ m, and the thickness of α and γ layer is 1-3 μ m.This CD can be a single or double.The single face multilayer disc has α, β and γ layer; From α, on the direction of β and γ layer, only the one side but not all add extra play on the two sides as δ or ε.If this disc has α, β and γ and ε layer then have refraction coefficient n 2Polymeric substrates can be used as the α layer.The double-sided multi-layer dish comprises α, β and γ layer, and at α, the extra play that adds on the two sides of β and γ layer, one side is as the δ layer, on the another side as ε layer (Fig. 1).Polymeric substrates can be inserted in the middle of the disc, so that guarantee physical strength.Yet, for the higher number of plies, because the polymkeric substance of α and γ layer is also enough even without this measure physical strength.The principle of " reading " pattern of multi-layer optical storage medium is based upon on the basis of waveguiding effect, wherein by λ 3The radiation of wavelength is from the irradiation of athwartship plane, and in the β layer＜=dispersion angle of 2 Θ caused having the total reflection of the dielectric boundaries glazing of different refraction coefficients, and therefore, light only passes through in the β layer.The value of Θ angle must satisfy following relation:
0<＝Θ<＝(sin√(n 1 2-n 2 2)) -1 (2)
In Fig. 2 a, provided the synoptic diagram that passes through.
λ 1The irradiation of the radiation of wavelength specific region in α that comprises photochromic material or γ layer causes photochromic material to be transformed into form II from form I, thereby refraction coefficient becomes n 3Such zone is can advised two borderline phase places of adjacent layer confusing, wherein may upset total reflection.In this case, the λ of the β ducting layer (Fig. 1) by not having photochromic material 3The light of wavelength can disconnect and can leave this layer, if having the thickness that this regional breadth wise dimension of the refraction coefficient of change has exceeded the layer that is doped with photochromic material; Perhaps can be scattered in this zone, if having change refraction coefficient the zone breadth wise dimension less than be doped with photochromic material the layer thickness, it still can leave ducting layer in this case.
In both cases, such zone has high irradiation ability, and will to lack focal length all will be observable in the equilibrium that the multiple scattering that produces owing to subsidiary scrambling constitutes does not have on the contrast background as the photosystem of point of irradiation.The confocal parameter value of photosystem must be 0.1 times of ducting layer thickness.Data deletion is by using λ 2The desired photochromic material of the rayed of wavelength zone (n 3The situation of refraction coefficient) realizes.This has initiated photochromic material from having n 2The conversion that the form I of refraction coefficient begins.
Be used for the equipment 7 that optical storage medium data writes, deletes and read in the example embodiment of first replacement scheme shown in Figure 3 and comprise, as optical emitter 1, can be converted to the second and the 4th harmonic wave based on Nd:YVO 4Quartzy laser instrument, thereby this laser radiation λ 1(1.064 μ m), λ 2(0.532 μ m), and λ 3The wavelength of (0.266 μ m).This optical radiation enters the optical splitter of being made up of y-shaped waveguide (light transmitting fiber) or integrated optical link 2.Optical splitter 2 has three outputs, at each end of these outputs, only occurs a wavelength X respectively 1, λ 2Or λ 3Optical radiation.In addition, this radiation enters the triple channel light modulation system 3 with e-management, and it can also be based on optical fiber or integrated optical element.This light modulation system 3 is guaranteed the separate modulation of the optical radiation of each individual wavelengths.λ 1, λ 2The radiation of wavelength by with y-shaped waveguide similarly but the coupling element 4 of opposite connection move on, by optical splitter 5, enter into the input end 6 of light focusing system by optical fiber with high irradiation ability.Light focusing system 6 guarantees that the propagation of optical radiation is parallel to each layer of CD, promptly on the direction of rotary CD radius 7.
λ 3The radiation of wavelength is incorporated into photosystem input end 8, and it guarantees to satisfy the light-beam position setting according to light beam geometric parameter and each layer of multiplayer optical disk of relational expression (2), and no matter horizontal (lateral) goes up the content of photochromic material.λ 3The radiation of wavelength in photochromatic layer because optics scrambling generation scattering.Drop on and have refraction coefficient n 3λ on cd layer 7 zones of the photochromic material that changes has taken place 3The part of the radiation of wavelength is from having the refraction coefficient n of change 3This zone come out, and fall in the focused light system 6, and continue to be forwarded to optics light demoder 9 by optical splitter 5, it is according to information that signal amplitude detection read; From these optics light demoder 9 transmission of electric signals to be further processed.
Walk abreast and read and to realize by using parallel light focusing system 6.
Fig. 4 shows the block scheme that is used for the equipment 7 that optical storage media writes, deletes and read of another implementation.By this replacement scheme, be used for the λ of optical memory disc data 3The optical emitter 1 of wavelength light radiation is by having the photosystem that is used for the focused light radiation, have with the matrix of the corresponding source of the number of plies number of the optical memory disc 7 that does not have photochromic material and form, these radiation sources are arranged like this, thereby 7 layers of each optical storage medias that do not have photochromic material are always all by a radiation source irradiates, and the exposure of each layer is switched by means of switch lambda in matrix 3Realize in each source of the optical radiation of wavelength.
Industrial applicibility
Write, delete according to optical storage media of the present invention with for optical storage medium data Can be used for requiring to store the meter of carrying out possibly the mass data of proofreading and correct with the equipment that reads The all spectra of calculation technology. Another kind of possible purposes is record, storage and playback video And audio file.

Claims (4)

1. multi-layer optical storage medium is characterized in that described multi-layer optical storage medium is made up of the light transmissive material of alternating layer, and wherein one deck is mixed with photochromic material, does not have another layer of photochromic material to have n 1Refraction coefficient, and photochromic material of the printing opacity that mixed can exist with two kinds of forms, promptly has n at form I 2Refraction coefficient and have the refraction coefficient of n3 at form II, described coefficient satisfies n simultaneously 1N 2And n 1＜=n 3Relation, and pass through λ 1The light spoke effect of wavelength is passed through λ with making photochromic material be transformed into form II from form I 2The optical radiation effect of wavelength makes photochromic material be transformed into form I from form II.
2. one kind is used for the equipment that the multi-layer optical storage medium data write, delete and read, and it is characterized in that described equipment comprises three different independent wavelength X 1, λ 2And λ 3Optical emitter (1), be used for to multi-layer optical storage medium (7) data record, delete and read, described optical emitter passes the triple channel modulating system (3) of the independent radiation modulation that is used for different wave length, is used to the λ that writes simultaneously 1The optical radiation of wavelength and be used to delete the λ of optical storage media (7) data 2The optical radiation of wavelength enters in the optical storage media (7) parallel with vertical with optical storage media (7) layer by means of light focusing system (6), and light focusing system (6) guarantees to be used for the λ that optical storage medium data writes 1The optical radiation of wavelength and be used for the λ of optical storage media (7) data deletion 2The motion of the optical radiation of wavelength is parallel to optical storage media (7) layer, and
To be used for the λ that optical storage medium data reads 3The optical radiation of wavelength is introduced in the photosystem (8), to guarantee λ 3The motion of optical radiation on plane perpendicular to optical storage media (7) layer, the exposure for each optical storage media layer of not having photochromic material is having refraction coefficient n 3The λ of incident on the zone of optical storage media (7) layer of the photochromic material that changes has taken place 3The part of optical radiation from having the refraction coefficient n of change 3This zone come out, and fall in the focused light system (6), and continue to be forwarded to optics light demoder (9) by optical splitter (5), the electric signal that detected of transmission is to be further processed there.
3. according to the equipment that the multi-layer optical storage medium data write, delete and read that is used for of claim 2, it is characterized in that using reading that another parallel focused light system (6) guarantees to walk abreast.
4. according to the equipment that the multi-layer optical storage medium data write, delete and read that is used for of claim 2 and 3, it is characterized in that using and the matrix that is used for the photosystem that optical radiation light focuses on having of the number in the corresponding source of number of optical storage media (7) layer that does not have photochromic material, as the λ that is used for optical storage media (7) data read 3The radiation source of wavelength (1), and these radiation sources are arranged by this way, each optical storage media (7) layer that does not promptly have photochromic material is all by a radiation source irradiates, and the exposure of each layer is switched by switch lambda in matrix 3Realize in each source of the optical radiation of wavelength.
CNA2006800227926A 2005-06-24 2006-06-23 Optical storage medium and optical device for writing, deletion and reading of data Pending CN101366086A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ20050413A CZ2005413A3 (en) 2005-06-24 2005-06-24 Optical storage medium and optical device for data recording, deletion and reading
CZPV2005413 2005-06-24

Publications (1)

Publication Number Publication Date
CN101366086A true CN101366086A (en) 2009-02-11

Family

ID=37570792

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2006800227926A Pending CN101366086A (en) 2005-06-24 2006-06-23 Optical storage medium and optical device for writing, deletion and reading of data

Country Status (4)

Country Link
EP (1) EP1924991A2 (en)
CN (1) CN101366086A (en)
CZ (1) CZ2005413A3 (en)
WO (1) WO2006136118A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022041855A1 (en) * 2020-08-31 2022-03-03 华为技术有限公司 Data reading/writing apparatus and electronic device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2405219C1 (en) 2009-09-28 2010-11-27 Эверхост Инвестментс Лимитед Multilayer optical disc

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5268862A (en) * 1989-04-25 1993-12-07 The Regents Of The Unversity Of California Three-dimensional optical memory
US5472759A (en) * 1993-12-16 1995-12-05 Martin Marietta Corporation Optical volume memory
AU2001284682A1 (en) * 2000-07-31 2002-02-13 Trid Store Ip, L.L.C. Method for data reading/writing using an optical carrier with pattern information pits
CA2363279C (en) * 2001-11-16 2012-11-06 Utar Scientific Inc. Waveguide multilayer holographic data storage
KR100429537B1 (en) * 2002-01-24 2004-05-03 삼성전자주식회사 Premises optical cable with s-z stranded strength member
CN1187745C (en) * 2002-10-11 2005-02-02 南京师范大学 Laminated light waveguide three-D data memory and single beam recording and reading access method
WO2004084204A2 (en) * 2003-03-18 2004-09-30 Koninklijke Philips Electronics N.V. Optical information carrier comprising thermochromic or photochromic material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022041855A1 (en) * 2020-08-31 2022-03-03 华为技术有限公司 Data reading/writing apparatus and electronic device

Also Published As

Publication number Publication date
WO2006136118A3 (en) 2007-08-30
WO2006136118A2 (en) 2006-12-28
CZ2005413A3 (en) 2007-01-31
EP1924991A2 (en) 2008-05-28

Similar Documents

Publication Publication Date Title
Mansuripur et al. Plasmonic nano-structures for optical data storage
US6009065A (en) Optical pickup for 3-D data storage reading from the multilayer fluorescent optical disk
JP4879324B2 (en) Recording / reproducing method, recording / reproducing apparatus, and recording medium
Walker et al. A new dimension
US6909684B2 (en) Optical recording medium, holographic recording and/or retrieval method and holographic recording and/or retrieval apparatus
US8018801B2 (en) Optical information reproduction device
CN101366086A (en) Optical storage medium and optical device for writing, deletion and reading of data
Xu Multi-dimensional optical storage
JP4234013B2 (en) Optical information reproducing method, optical head device, and optical information processing device
JP2003228848A (en) Optical recording and reproducing method and apparatus
Ide et al. Interlayer crosstalk reduction of a multilayer Blu-ray Disc using a grating in a three beam optical system
CN100399441C (en) Optical recording medium as well as optical recording and reproduction method
CN100481222C (en) Optical head and disk reproducing apparatus
JP2002334480A (en) Optical information recording medium
US20020122374A1 (en) Optical recording medium, optical information processing apparatus and optical recording and reproducing method
JPH0721564A (en) Method and device for recording and reproducing optical recording medium
JP4498056B2 (en) Optical information recording medium and optical information recording / reproducing method
CN102549663A (en) Device for recording, erasing and reading data on a multi-layer optical disc
JP2006073123A (en) Near-field light slider and near-field light recording/reproducing apparatus
CN102598132A (en) Device for recording and reading data on a multi-layer optical disc
Ma et al. Writing and reading method
JP4525327B2 (en) Optical recording and playback method
EP2157575A1 (en) Method and apparatus for reading data from an optical storage medium, and respective optical storage medium
Esener et al. Present performance and future directions in two-photon addressed write once read many (WORM) volumetric optical disk storage systems
Esener et al. Present performance & future directions in two-photon addressed volumetric optical disk storage systems

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Open date: 20090211