CN1608274A - Optical memory system for information retrieval from fluorescent multilayer optical clear card of the ROM-type - Google Patents
Optical memory system for information retrieval from fluorescent multilayer optical clear card of the ROM-type Download PDFInfo
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- CN1608274A CN1608274A CN 02817297 CN02817297A CN1608274A CN 1608274 A CN1608274 A CN 1608274A CN 02817297 CN02817297 CN 02817297 CN 02817297 A CN02817297 A CN 02817297A CN 1608274 A CN1608274 A CN 1608274A
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C13/00—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
- G11C13/04—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam
- G11C13/048—Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using optical elements ; using other beam accessed elements, e.g. electron or ion beam using other optical storage elements
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- 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
- G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
- G11B7/0033—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with cards or other card-like flat carriers, e.g. flat sheets of optical film
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- 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
- G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
- G11B7/08511—Methods for track change, selection or preliminary positioning by moving the head with focus pull-in only
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- 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
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Abstract
A multilayer fluorescent optical storage medium has data layers with fluorescent pits for storing the information. The pits on each of the layers are organized to define a plurality of stills. Each stack of stills can be read without lateral movement of the reading head. An eight-to-ten code for encoding information to be stored is also used.
Description
Technical field
The present invention relates to be used for the optical memory system of fetching page by page of information, more particularly, relate to the optical memory system and the equipment of the information retrieval of autofluorescence multilayer ROM (read-only memory) (ROM) optical clear card.
Background technology
Existing optical memory system utilization has the 2-D data carrier of one and two Information Level.The variation of laser light reflected radiation intensity in the regional area (pit) of the technical solution proposition formerly of the majority in optical data recording method recorded information layer.These variations can be by the disturbing effect to CD or the concavo-convex CD of DVD ROM type, by the aperture of firing in the metallic film in the widely used CD-R system, dye bleach, the local melting of polycarbonate causes [Bouwhuis G. etc. by the variation of reflection coefficient in the phase transformation system etc., " Principle of Optical Disc SystemS ' '; PhilipsResearch Laboratories, Eindhoven, Adam Higer; Ltd., Bristol andBoston].
Fig. 1 has represented along the CD that uses 14-position EFM (8-14 modulation) channel modulation spacing and the surface of DVD form optical information carrier, the signal geometric configuration that the two-dimensional space of information pits distributes.Available such as dimple size (the shortest pit length-1, width-w, the degree of depth-d, track pitch-p) and channel bit length and so on the space distribution of parameter characterization information pits in CD and DVD-ROM.
The numerical value of these and other parameter of CD and DVD-ROM is referring to table 1[InformationStorage Materials, pp.36,42].
Table 1 is from CD to DVD
Parameters C D DVD
Wavelength X, nm 780 650
Numerical aperture 0.45 0.60
The shortest pit length, nm 831 399
The degree of depth, μ m 0.13-0.15 0.11-0.12
Track pitch, μ m 1.6 0.74
Channel bit length, nm 277 133
Modulating mode
*EFM EFM
*
Physical bit density 106 508
Mbit/cm
2 1.2 4.0
Datum velocity CLV, m/s 0.9 0.55
Luminous point size λ/2NA, mm 0.65 4.7
Capacity, GB
*For EFM, have 17 channel bit (14 bits of modulation and position, 3 edges) that are used for 8 data bit.Each channel bit is corresponding to 1/3 of minimum mark length.Physical bit density equals 1/ (track pitch * channel bit length * 17/8).For EFM
*, replace 17/8 factor with 16/8.
Thereby, can find out from table 1, convert the DVD form to and will show increase density, thereby significantly improve the quantity and the reading speed of canned data.But Fig. 1 and table 1 prove that also information pits only occupies the partial information layer, compare with its greatest limit, and this has significantly reduced the quantity of density and canned data.
In order to improve recording density, can use such as in conjunction with high aperture NA lens, adopt the method (for example referring to table 1[I.Ichimura etc., SPIE 3864,228]) of short radiation source of wavelength and so on.We also can reduce track pitch, increase the depth of groove [S.Morita etc., SPIE, 3109,167] of convex ridge groove recording disk.New medium and read method [T.Vo-Diny etc., SPIE, 3401,284], pit depth modulation [S.Spielman etc., SPIE, 3109,98] and have the CD [Satoh etc., United States Patent (USP) #5572508] that is the square information pits that symmetrical pattern arranges and be used to the high density information storage.
In United States Patent (USP) #4634850 and 4786792 (Drexler Technology Corp.), in order to improve packing density, and make mistake reduce to minimum, can use " four times of (quad)-density " or " miniature chessboard " of the digit optical data that read by the CCD photodetector array but quantity that form makes optics be kept at the numerical data on the animation film (or optical memory card) quadruples.
Show that in the two-photon absorption mode three-dimensional (evenly) photosensitive medium of various optical physicss or photochemistry nonlinear effect allows us to realize surpassing the data writing density of every cubic centimetre of number terabit.In these three-dimensional WORM or WER data carrier, the collaborative two-photon absorption of photosensitive composition and photoreaction product by the intermediate virtual aspect, perhaps the record that changes of refraction parameter constitutes best writing and read mode.For photochrome [D.Parthenopoulos etc., Science, 1989,245,843] or the photobleaching material, and light reflection crystal [Y.Kawata etc., Opt.Lett.1998,23,756] or polymkeric substance and photopolymer [R.Borisov etc., Appl.Phys., 1998, B67,1], situation also is like this.
On the principle, this writing with read mode allows by the optical property that changes in the data medium, with the form local record data of pit (being similar to the information pits among traditional reflective CD or the DVD-ROM).
But owing to the cost height of required phot-second (phemtosecond) lasing source of this record, size is big, and because the photosensitivity of medium is extremely low, therefore the actual realization of this principle constitutes a great challenge.Usually, this extremely low photosensitivity of medium is caused by the present extremely low two-photon absorption xsect parameter of our known photochromics.
Technically, if we want to increase the data volume of preservation, we should use the two-sided optical information carrier of multilayer, because they are more efficient.But, their application also has some restrictions, can produce about the design of data carrier medium and data recording pattern and equipment and the other problem of character, especially with regard to dark especially in medium inside about WORM-and WER-optical memory data to write pattern all the more so.
Under reflective-mode, with each Information Level of partial reflection coating coated with multiple layer optical information carrier.Because light beam arrives the specified message layer by medium, and returns receiver, so this has reduced the intensity that reads light beam and folded light beam.
In addition, because their relevant person's character, the light beam that sees through is subjected to refraction (this is difficult to eliminate), also can be subjected to the interference distortion of the fragment (pit and groove) of Information Level.
Here it is preferably utilizes the reason of the multilayer fluorescent optical information carrier that fluorescence reads, because there is not the partial reflection coating in this carrier.In this case, because the incoherent person's character of fluorescent radiation, to compare its wavelength longer with reading optical maser wavelength, and towards the transparency of the optical medium of laser and fluorescent radiation and the cause of homogeneity (the similar reflection coefficient of different layers), refraction and interfere distortion much smaller.Thereby, to compare with the catoptrics storer, the multilayer fluorescence carrier has some advantages.
This system is based on noncoherent signal such as fluorescence, and the spatial resolution of fluorescence is a coherent approach, the twice that for example reflects, absorbs or reflect is (referring to Wilson T., Shepard C.Theoty and Practice of Scanning Optical Microscopy, AcademicPress, London, 1984).Utilize noncoherent signal to allow the multilayer optical storer that information capacity is increased more than the octuple.
In United States Patent (USP) #4202491, use a kind of fluorescent ink layer, its data point is sent infrared radiation.
Jap.P. #63,195,838 propose a kind of WORM CD with fluorescence read mode, and the data carry layer is coated onto on the mat surface of basic unit.Since read and write the strong optical scattering of radiation, on the basis of this WORM, absolutely not generation multi-layer information structure.But, utilize the fluorescence complex, can produce multiplayer optical disk.In United States Patent (USP) ##6027855 and 5945252, and this technology has been described in EP 00963571A1.
United States Patent (USP) #6009065 and #6071671 (V.Glushko and B.Levich) have described the equipment of the information that reads by turn from the multilayer fluorescent optical disc.
Summary of the invention
The present invention relates to fluorescence multilayer ROM (read-only memory) (ROM) optical clear card.In an embodiment of the present invention, data are stored in the sandwich construction that is made of Information Level thin on a plurality of optics, and described Information Level is separated by separation layer.Form with independent fluorescent material mark is kept at data bit in the Information Level.
Description of drawings
Fig. 1 is by the EFM code, under the help of fluorescent material, and the synoptic diagram of the geometric configuration that distributes along the two-dimensional space of the information pits of the surface recording of the optical data carrier of CD-and DVD-form.
Fig. 2 is the synoptic diagram that utilizes one of the architectural options of ROM type fluorescence multilayer optical card and xsect thereof.
Fig. 3 is information page (a), district (b) and frame (still) synoptic diagram (c) of the information field of one of FMLC data Layer.
Fig. 4 is by the ETT code, the synoptic diagram of the geometry of four neighbor information bytes that write down under the help of fluorescent material.
Fig. 5 is the synoptic diagram of fluorescence multilayer optical card fetch equipment.
Fig. 6 is the application drawing that optical module and the optical card in the fetch equipment located (card moves) system.
Fig. 7 is the function sensor of formation from the part of the fetch equipment of optical multilayer fluorescence card reading of data.
Fig. 8 has represented the data handling system under the read mode.
Fig. 9 is the optical picture that reads the equipment of information from optical multilayer fluorescence card.
Figure 10 is the top view (a) and the cross-sectional view (b) of matrix and lenticular LED and lenticule fragment.
Figure 11 is the signal schematic diagram of matrix of microlenses.
Figure 12 is the synoptic diagram of the equipment of optical card loading and location.
Figure 13 do not need to have represented the mobile optical card, successively adjusts the variety of way of focus.
Figure 14 has represented to utilize the initial calculation machine image of one of fragment of the fluorescent optics card that the EED code writes, λ=0.65mmc, NA=0.65.This image can be used for producing photo template, so that form the Information Level of ROM type multilayer fluorescent optics card.
Figure 15 has represented the computer picture of the same fragment of the fluorescent optics card information layer that formed by the fetch equipment optical system along the floor plan of CCD camera coverage.
Figure 16 has represented to be read by the CCD camera, carries out the computer picture of the same fragment of Computer Processing subsequently.
It should be noted that above-cited accompanying drawing does not reflect the actual ratio and the size of a certain parts.Accompanying drawing just is used to make the structure and the principle of operation of easy to understand ROM type multilayer fluorescent storage device system.
Embodiment
The following describes read-only fluorescence multilayer optical storer see-through card (clear card) (FMC-ROM) 200 and one of the option of the structure of xsect.This structure is made of following essential part: be the metal or the plastic clip housing (201) of rectangular shape, it is of a size of 45mm * 25mm * 2mm; The 1.6mm that on the basis of multi-layer optical data carrier (FMLC) 203, prepares " optics embolus (insert) " (202), it is of a size of 35mm * 15mm * 1mm, and multi-layer optical data carrier 203 places on substrate of glass (glass pad) (matrix) 204.Glass substrate material can be used quartz, transparent polymer, for example polycarbonate, polyalkyl acrylate, poly-cycloolefin and other.The protective seam 205 that thickness is about 100mmc is used to protect optical data to carry the physical damage that medium is avoided harmful erosion environment condition.
The edge that the housing 201 of optical card (200) is designed to protected data district FMLC 203 is exempted from by mechanical tensioning and is made dirty.It also helps to deposit in fetch equipment and mobile FMC card 200.
Have on " fixed frame " 206 of optics embolus 202 attached to optical card (200) housing (201) of multi-layer optical data carrier (203).This can realize by heat of filling the space 207 between optics embolus and the framework (206) or the poly-adhesive (photopolimerizing glue) of light.Gluing together optics embolus and framework (206) before, should utilize " coupling notch " 208 and 209, locate these parts relative to one another, be exposed to heat or ultraviolet ray (UV) radiation subsequently, so that solidify adhesive.
Fluorescence multi-layer optical data carrier (203) is made of a plurality of data Layers, thereby it looks like one group of 12mm * 32mm thin layer (210) of thick about 0.5mm (preferably).Their workspace is of a size of 10mm * 30mm, similar numerous independent information flags of reflection pit or pit that the workspace comprises and uses in well-known CD or DVD ROM system.These pits can be counted as the fluorescence labeling (211) with respect to non-fluorescence background (212) layout.It should be noted that the size of " information is carried the district " 213 (workspaces) in each data Layer (210) is approximately than the little 1mm of size of FMLC card (200).Data Layer (210) by thickness be 50mmc " middle layer " (219) separately.The middle layer is transparent, is convenient to read and data carry fluorescent radiation (emission).By thickness is several microns light or hot gluing layer, and this group data Layer (210) and middle layer (219) are glued together.Total forms single fluorescence multilayer carrier FMLC 203.In order to eliminate the ghost effect that the light reflection, scattering and the diffraction that are sent by the out of focus layer cause, if possible, we should select the similar refraction coefficient in data Layer and middle layer.
This FMLC sandwich construction (203) that is being mingled with the middle layer in the data Layer should comprise plural at least data Layer (210), but ideally, comprises that 10 data Layers will be better.This structure is placed in the substrate (matrix) 204.Substrate (204) is made by transparent or nontransparent inorganic material (for example glass) or by polymkeric substance (for example polycarbonate, Polyvinylchloride, chlorinated polyvinyl chloride, polymethylmethacrylate, polystyrene, acrylic acid, polyolefin or similar material, acrylate and epoxy photopolymerization plastics etc.).These materials can easily polish, polishing and molding; can use injection molding or injection compression; perhaps adopt by the initial liquid monomer of optical processing (2P technology) curing or UV polymerization [the Bouwhuis G. etc. of oligomer complex; " Principles of Optical Disc Systems "; Adam Hilger Ltd., Bristol andBoston].These materials are processed, are not less than optical grade 14 up to their roughness, with the deviation of flat plane may be for till 2～5 Newton rings (Newton ring).Only in this way, could obtain the required quality of product engineering properties.In addition, along with the past of time, substrate should be able to withstand distortion, and keeps its high smooth quality and at the different-thickness of assigned address.Substrate (matrix) 204 is as the substrate of the FMLC 203 that is mounted thereon, and it also helps to realize the accurate location of FMC card (200) in its framework (206).Fetch equipment read radiation assembly and fluorescence signal data recording assembly is positioned under the situation of FMC 200 both sides, substrate 204 can be transparent, perhaps comprise the transparent embolus of being made by optically transparent material at least, it should be positioned at identical position with FMLC (203) data carry territory (213).
In order to eliminate too much moving, and make the number of photoelectricity receiving unit under the read mode reduce to minimum, and keep high reading speed, whole workspace (information field) 213 is divided into the page or leaf of some, for example is divided into 3 pages of (214) (as shown in Figure 2).This page or leaf is about 10 * 10mm.Distance h 218 between the adjacent two data page or leaf is about 200mmc.(it is one group of rectangle or square area (for example one group of 25 zone) (315) that Fig. 3 a) looks like to these pages or leaves, and it is of a size of 2mm * 2mm, and along Y-axis, the distance between them is 17.4mmc, and along X-axis, the distance between them is 3.2mmc.They comprise maximum 117 frames (still) (316) (Fig. 3 b) respectively, but wherein have only 115 can be Data-carrying.Frame size depends on fetch equipment design, can be 204.8mmc * 153.6mmc, is respectively 17.4 and 0.8 along the distance of coordinate axis.Zero frame (319) is used for accurate adjustment, and (up to 0.1mmc, precision is up to 10 under angular coordinate along X, Y and Z axle
-3Radian).
These frames are divided into bunch (317), and in each frame, its number reaches as high as 48 (X and Y-axis along optical card (200) information field (213) are 6 * 8) (Fig. 3 c).Bunch size can be about 25.6 * 25.6mmc, and the distance between them is 1.6mmc along Y-axis, is 0.8mmc along X-axis.Cluster can comprise the information (byte (318) equals its 10 pits (321) (Fig. 3 d) that are of a size of 0.4mmc * 0.4mmc, and a byte comprises about 8 information) of 372 bytes.Bunch size also depends on encryption algorithm, and encryption algorithm is used to eliminate aberration (aberration) and distortion.According to one of algorithm in the coding method, one group of 32 byte will be preserved 24 bytes, and the minimal data amount will be one group of 32 byte or 320 pits (if the ETT that we use to quote below coding (8-10 coding)).Thereby cluster should have N * 320 capacity, and N is more than or equal to 1 here.We need divide cluster frame, make them more reliable, and the implementation space low frequency component is to the quick elimination of the deleterious effect of the contrast of " 0 " and " 1 " signal.In addition, frame also is included as frame and reads the 15 * 15mmc support region (320) that focuses on fast in the process and locate and design.
FMLC (203) ROM data Layer (210) also comprises the ROM address field that other is additional, and described ROM address field carries the support data, supports data can support for example read head and FMC 200 card mutual location relative to each other.
The several frames that are positioned at overlapped different pieces of information layer can form the frame (a stack ofstill) or the information stacks (stack) of piling up.We can read information from this information stacks, and needn't move read head along the FMLC plane, and we only need be the frame of lens focus in from a framing control in one deck to another layer for this reason.The FMLC address field is realized centering, and they can be positioned at, and for example in ground floor or last one deck, perhaps is positioned at each FMLC layer.
When successively reading in the frame that is piling up, aim at and read the cost minimum of adjustment in order to ensure optical system, we should make the thickness (distance between the adjacent data layer) in middle layer keep 1mm, the precision of the space overlap of information field should be within ± 1mm, and the overlapping precision of their angle should be about 1013 radians.
Fig. 4 represented with by two-dimensional encoded ETT (8-10) code along the surface of FMLC data Layer that proposes, rather than the signal geometric configuration of the two-dimensional space distribution of the information pits represented of the form of four adjacent byte (40) of present obsolete EFM (8-14 modulation) 14-channel modulation code record.In addition, in the invention that proposes, an information byte is recorded in the territory (microcell) 41, territory (microcell) 41 is by having a certain size, for example 10 of 0.4 * 0.4mmc (2 * 5) square shaped cells (being called " 2 * 5 " territory) composition, and each square shaped cells can comprise also can not comprise fluorescent material.Thereby the fact of the availability of fluorescent material or unavailability is as the existence whether indication of information pits in this territory.
Thereby when our recorded information, each pit in these pits can be received in when radiation is read in absorption, becomes epipolic material, and for example the unit 42, also can not be received in described fluorescent substance, and for example the unit 43.Thereby the information of a byte will occupy the 10S square, i.e. S=a * a, and " a " is the area (square) of a square shaped cells here, and another " a " is one of square opposite side.Settle adjacent byte with crossing the space that is adjacent to each other, do not have any gap the description and do not resemble among Fig. 4.
On the surface of data Layer (210), the whole 256 kinds of combinations that comprise information byte are described as the territory that is made of 10 (2 * 5) square shaped cells, and it can be two types.First kind of 222 kinds of combination is described as the territory that each square shaped cells (42) has been received in a certain fluorescent material (information pits or fluorescence labeling), in its (2 * 5) territory, in these pits each has at least one similar adjacent cells, described adjacent cells is become delegation ground or arranged crosswise, and each square shaped cells (43) that is not received in fluorescent material also has such adjacent cells in its territory.We call the condition of coupling to this condition.We will see that the byte (shown in Fig. 4) of top two bytes and lower-left side satisfies these requirements subsequently.
Remaining each combination can be described as complementary territory, in these complementary territories, in the upper left side or lower-left side unit in (2 * 5) territory, does not satisfy the condition (lower-left side byte is referring to Fig. 4) that couples.Only exist 52 these couple the territory, these couple certain reservation (backup) that combination is guaranteed to be used to serve in the territory because usually, 256 kinds of combinations of an information byte of a pattern of wants.Under read mode, in each band that our equipment can be selected to be made up of territory that is bonded with each other or byte, satisfy the territory that couples requirement, because the territory of selecting is bonded together with the territory that is positioned at its left side.Thereby the Minimum Area that is received in fluorescent material comprises two adjacent fluorescence ingredients or information pits (fluorescence labeling), thereby it is of a size of a * 2a.The Minimum Area that is not received in fluorescent material has identical size.
By the ETT technology of the two-dimensional signal coding that proposes, the whole zone of our energy enough fluorescence labelings (information pits) padding data layer, and can not stay any gap.This will allow to utilize by one dimension or 2 D photoelectric controller array, read method when for example utilizing the charge-coupled device (CCD) camera.
Fig. 5-8 has represented to have the fetch equipment unit (500) and the primary clustering thereof of ROM type fluorescence multilayer optical card (501).Thereby fetch equipment comprises following primary clustering:
1) the rough toward each other and accurate location of optical card and optical module system (510), it comprises following:
-utilize the subsystem rotating mechanism to load the node (511) of optical card;
The sensor (701 and 702) at angle (current card coordinate) is loaded in-indication;
-indication is loaded end (end) sensor (701) of device state (" opening-close ") and is indicated the end sensor (601) of the availability of blocking in the load units;
The mechanism of the mobile lenticule of-(according to focus) (microlen) array (perhaps according to focus mobile optical card);
-have a focus sensor (703) of optical module;
The device (603) of-installation and replacement compensating plate;
-moving field lens are so that adjust the device of optical system amplification coefficient (moving along optical axis);
The subsystem of-control operating control (driven by engine device etc.).
2) system (520) of the various light beams of radiation is read in formation, and this system comprises following assembly:
-the most commonly, illuminate the two-dimensional matrix of some regional luminescence unit of optical card;
-form and read the light field that radiation beam is formed by various, and guarantee to place the optical subsystem that reads of the FMLC information stacks (210) that illuminates light the place ahead; With
The matrix control subsystem of-fluorescent optics unit.
3) comprise and form the optical system (530) of matrix of microlenses of numerous optical channels that its number equals the number of fluorescent optics unit.This system is used for fragment pattern (frame) is transferred to the light-receiving matrix from the surface that just is being read with fixing ratio.In addition, optical system (530) also comprises those common concerning all passages assemblies: light filter, field lens and optics evener;
4) record is from the system (Fig. 5 and 8) of the information of FMC, and this system comprises following assembly:
-based on the detecting device (801) of matrix light optical receiving sensor;
-based on the detecting device controller (802) of digital signal processor;
-identification also converts the position in the programmable transition device (803) of the information pits that adopts in the fluorescence records;
The device (804) of-antagonism aberration code decoding;
-the digital interface (805) of data forwarding to microcomputer;
-data stream is transmitted to the digital interface (806) of decompressor of outside;
The controller software (807) of-generation feedback signal.
5) microprocessor system of opertaing device assembly (560);
6) power supply (570).
For our invention, we also provide the signal of optical data fetch equipment (optical pickup apparatus) to select one of (referring to Fig. 9), in fluorescence carrier, optical data fetch equipment (optical pickup apparatus) is encoded to data with the ETT two-dimensional approach, and described fluorescence carrier is prepared to multilayer optical card (200).This high speed of guaranteeing mass data reads.
The basic module of this optical memory system is as follows:
1) FMC ROM type multilayer carrier-fluorescence multilayer optical card (910);
2) 920-comprise lighting device (921) and have special selective filter (923) light collection optics (922) read radiation (938) device; With
3) parts of 930-recording information signal (937), comprise the matrix (931) that forms by high temperature (NA～0.5) aspherical microlens (932), one group of optical compensation assembly (933), another spectral selectivity light filter (934), field lens (935) and light receiving element matrix (936).It should be noted according to optical card (910) being placed mode therebetween arrange the parts (930) that read radiation appliance (920) and recording information signal.
In order to ensure the rearrangement of each layer of optical card, card (910) produces vertical moving.But, exist preferable second to select.In this selection, we use one group of special compensator.These compensators (933) are the high precision plates of optical transparency, and its thickness is identical with the middle layer, and form (referring to Figure 13 and [United States Patent (USP) #5381401]) by extendible wedge (wedge) etc.They are periodically inserted the optical channel of fetch equipment.The number of these optical elements equals the number of data Layer in the optical card.We think that second kind of selection is more desirable, because in this case, we manage to eliminate the aberration that is caused by the change of optical density.Under second selection, the degree of depth that layer is reset is limited by the optical system operating distance only.Also can use adaptive optical element, for example by the spatial light modulator of liquid crystals preparation.This selection is more promising, because it has not only adjusted focusing, and automatically an equipment is remained on focus (automatic focus).
Spectral selectivity light filter (934) is used to filter the remaining radiation of reading, so that separate the desired signal that is produced by data carrier fluorescence (937).It is between matrix of microlenses and field lens.Under another was selected, we can use the reflectance spectrum light filter that is installed in fetch equipment (before receiving trap).Available electrical way is adjusted these recesses (Notch) type light filter, and these Notch light filters are by the liquid crystals preparation of guaranteeing that good radiation spectrum filters.
In order to excite the fluorescence of optical card (910) data Layer, with this optical card of radiation irradiation, its video picture (specter) is relevant with the video picture of the absorption bar that is made of luminophor.Because its well-known characteristics, semiconductor emitter adapts to this purpose admirably such as LED (light emitting diode).They can be solid, organic or laser diode (LD).In order to improve from the speed of optical card reading of data, and card is moved reduce to minimum, we advise the LD matrix that uses LED matrix lighting device or have vertical cavity surface emitting laser (VCSEL).This device can be prepared to one group of semiconductor diode (924) that (matrix (921)) are independent, perhaps is prepared into the spatial structure of utilizing planar technique to produce.The matrix 922 that is formed by the lenticule that is used to assemble input radiation (925) also can be prepared to one group, perhaps is prepared into the spatial structure of utilizing integrated technology to produce.
We have selected so a kind of technical scheme, promptly adopt the one group of symmetric matrix (921) that is formed by 25 commercial high-brightness blue LED (924).The InGaN heterogeneous texture that utilization is grown on the sapphire bottom is made these LED.Diode is arranged to square net (Unit 5 * 5), and the distance between the adjacent LED is 2mm.Matrix of microlenses (925) has similar size.The size of each light emitting diode is about 350 * 350 * 100mmc.Some diodes only have the contact in a side.
Lighting device (920) comprises its matrix (921), and LED needs only needs with guaranteeing, with regard to the electronic controller (not shown among Fig. 9) of any LED of switch (924).
Strictly periodic alignment is arranged the LED crystal, and it is arranged in silicon base (100) upward (Figure 10), and silicon base (100) is [100] aligning along the plane, and silicon base (100) also is used as heat conductor, and when needs, reflection LED radiation (101).By alternating spray metal and dielectric coat, and utilize photoetching process and chemical etching (staining), prepare the system of two way contact according to the integrated technology of standard.In order to produce solid metal reflector (103), we use alkaline etch.Use alkaline etching substances selectively, and alkaline etching substances only influences open square area, because the protected property of remaining material SiO
2Mask covers.Form with frusto-pyramidal forms reverberator, and its conical surface becomes the angle of 55 degree with respect to plate.The coated aluminium of reverberator inside surface.The use of these reverberators is guaranteed to compare with the selection that equipment is installed on the straight metallic silicon face, and the luminous energy of output increases 1.5 times.
Use welding to open contact (102) afterwards at us, matrix substrate (100) engages with another matrix (104) that is formed by spherical lenticule (105).Realize described joint by high precision apparatus, this structure is assembled within the integrated circuit framework, and the lid of described integrated circuit framework has the light filter of being with window (923).
Collect from the radiation of each LED by this group matrix that spherical lenticule condenser (922) forms, form 25 light beams, (in about 200 * 150mmc), the uniform plane of the optical card data Layer that just is being read distributes the radiation intensity of light beam (RMS＜0.07) along the border of Frame.The LED radiation image can comprise the overlapping weak long wave flank (wing) of luminophor band with optical card (910).In order to eliminate this spur signal, we place bandpass optical filter (for example dichronic mirror) (923) on the matrix output plane.
Under the data read pattern, the LED that excites shines the frame that piles up in all card data Layers simultaneously.By changing the focus that receives lenticule (932), can project the matrix that constitutes by light receiving unit to some page.Excite LED one by one according to time series.After 25 frame reading of data, optical card is moved forward the distance that equates with page width, whole process repeated.
Matrix of microlenses (931) forms initial pattern (image) on the indefinite data Layer of number.Be similar to LED matrix (921), matrix of microlenses is by placing one group of 25 lenticule (Unit 5 * 5) in the square net to form, and the distance between the lens center is 2mm (Figure 11).It is disposed in the place with the about 1mm of distance of the information field (213) of optical card (200).Because each lenticule is designed to transmit by less than 1 micron (phosphor pattern (image) (fluorescent radiation video picture band is about 50nm) of the Frame of the unit formation of about 200mmc * 200mmc), so we should select to greatest extent the optical design near theoretical limit.Under wavelength of fluorescence (about 500nm), each lenticular numerical aperture is not less than 0.5.Use in the CD Player, numerical aperture is 0.5, and the commercial lenticule of diameter 5mm has the visual field of 100mmc.Because they are basic lenslet, so there is aberration in they.Design alternative (which selection that we propose?) allow us that 200mmc is brought up in the visual field, and lens diameter is reduced to 2mm.In our design, we also use two (?) finishing coat, to eliminate the aberration in whole fluorescent imaging scope.Thereby each lenticular basic parameter is as follows: the achromatism lenslet, and work video picture scope-470～520mmc, diameter-2mm, focal length-2mm, numerical aperture-0.5 is amplified-unlimited.
Field lens (935) is used for projection each phosphor pattern by the Frame (316) of relevant lenticule (932) formation of matrix (931).Field lens projects same position on the light receiving unit matrix plane of living in (936) to them.Its diameter is just over the information field diameter (213) (preferably 1.2cm) of optical card, and its preferred focal length is 40mm, because it determines that the optics of whole optical system amplifies.Field lens (934) and be positioned between the lenticular focal length of matrix (931) ratio must near light receiving unit matrix (935) and data page (?) between ratio.Under this operator scheme of optical system, be the image of the arbitrary data frame at center (along axle location) always conform to (Fig. 9) with the position of light receiving unit matrix (936) with each lenticule (932) in the matrix (931).
We can use CCD CMOS array as the light-receiving matrix.Thereby we have used the standard CC D camera of being made up of 1024 cell arrays (768).Each pixel is of a size of 4.65 * 4.65mmc, and its frame rate was 25 frame/seconds.
The process of data read comprises following Main Stage: optical card is loaded in the fetch equipment; Installation site sensor, and data read.
One of select about the loading of optical card in the fetch equipment and the signal of location, referring to Figure 12.In this phase one, the container (1201) with optical card (1202) is placed in companion flange (1203) next door, and utilizes breech lock (snap close) (1204) to lock it in place.
Be used for the rough straight line that moves (?) device grips the end of card, it is moved in the locking device (1206) of reading device.Container withdraws from (1201), and locking device (1206) opening has the funnel (funnel) (1207) that guarantees card smooth motion (can not hooked).The motion of locking device alignment sensor (1208) controlled motion mechanism (1209), and when they detected mark (recess) (1210) on the optical card frame (1211), motion stopped.Card is by the programmable device fix in position.
Mobile device constitutes one group at least 2 three-dimensional piezoelectric ceramic devices, and described three-dimensional piezoelectric ceramic device guarantees that low tone along any direction in three directions is apart from shuttling movement.The combination of phase place and direction of motion makes it possible in equaling hundreds of microns high-precision big dynamic motion, simultaneously moving locking device and card.
By to the telecontrol equipment power supply, realize motion.When device is in the starting position, in the stage 1, to device 2 power supplies, order " upwards advancing " appears subsequently promptly, and device 2 receives order " retreating " downwards.In the stage 2, the device of rising is vertically being shifted to its starting position.Circulation subsequently repeats.
By along the plane distribution piezoelectric ceramics, and their motions in opposite direction, guarantee rotation.
The optical motion sensor looks like two linear funnels.One of these funnels (movably funnel) are connected on the locking device, and another funnel (fixing funnel) is connected on the shell.When funnel is exposed to parallel beam following time, look like that the image of numerous bands is received by optical receiver.Distance between the band depends on the theta alignment of funnel, and the angular deflection of funnel is depended in the position of band (strip).The employing of PZC slipstick (scale) makes it possible to measure the accurate position of band, and its number of the band of process of optical receiver count enable, thereby the number in counting funnel cycle.
Locking device constitutes the platform of the movable-component with optical card gathering sill (roughly), anchor clamps and infundibulate sensor.
In fetch equipment, illuminate data page with lighting device, so that read.The data page fluoroscopic image is exaggerated and projects on the matrix surface of optical pickup apparatus.Should be projected onto one group of specific pixel according to a pit, for example project the mode on 2 * 2 pixel squares, select amplification coefficient from data page.In other words, the position of pit and pixel is strict relevant.For example, 4 pixels in the upper left corner of the pit in the upper left corner and light-receiving matrix are relevant.This solution (correlativity between pit and the pixel) helps to eliminate the high Flame Image Process of cost, and it also adopts quite simple and cheap microchip to be used for picture decoding.The following describes the data page decoding algorithm, it comprises the following processing that utilizes pixel signal, continuously poll optical receiver matrix pixel.
Load node and skid off equipment.Card is inserted in the receiving slit (or receive carriage) of equipment, up to locked in place till.In case sensor is confirmed the availability of card, then loads node and will slip in the fetch equipment, and stop at the position relevant with the position of one of information segment.This loading process should guarantee to adjust in page visual field of the preliminary election lens that are in lens arra.Adjust page or leaf and be arranged in data Layer, its size equals the size of data page.Adjust page or leaf and form (referring to the chapters and sections of describing optical card) by a plurality of fluorescence labelings.The precision of the initial installation that blocks in the loading attachment equals along its each coordinate, half of information page size numerical value.For example, if data page is of a size of 200mmc * 150mmc, then installation accuracy is assumed that along a coordinate be 100mmc, is 75mmc along another coordinate.
After rough installation card and node, open illumination.The illuminator passage is corresponding to adjusting page or leaf.Make the electric pulse of opening the illuminator passage and the impulsive synchronization that starts optical pickup apparatus (FRD) frame scan.Fluoroscopic image is projected onto on the FRD matrix surface.By utilizing still image, multilayer fluorescence card register system forms the control signal of following coordinate: 1) " focus ", 2) two coordinates and 3 in " X " and " Y " plane of card) angular coordinate " φ ".By control system, these signals are sent to positioning system.Positioning system takes several steps to adjust optical card: 1) at first, adjust focus; Subsequently 2) revotating card and 3 in the plane of card) in this plane, move card, till the position that the mode of conform to the corresponding row and column of FRD matrix with the row and column of adjusting page or leaf (association rules can be described when adjusting page or leaf when we reach) is determined to block.If some marks of adjusting on the page or leaf can not mean that the optical system enlargement ratio is not equal to the nominal enlargement ratio when the corresponding pixel of FRE conforms to.By with respect to FRD along optical axis moving field lens a little, carry out the enlargement ratio adjustment.By utilizing the image of adjusting page or leaf, multilayer fluorescence card register system forms " ratio " fault-signal, and sends it to the device that the controlling filed lens move.
In case all fault-signals reach 0, then accurately to be positioned its initial coordinate be 0 starting position for supposition card.
Stage 2. is provided with position transducer
When the accurate location of adjusting page or leaf is identified, loads node location sensor counter and the large-scale sensor counter of lenticule and reach 0.Utilize the further location of the data continuation optical card of position transducer.
Utilize position sensor data, card is moved to the position relevant with first information page or leaf, and displacement equals the gap periods of page or leaf.Open the illuminator passage one by one, FRD is from the information page reading of data.
Card moves to the next position subsequently, repeats said process, till all data pages in lens matrix has scanned the zone of " looking after " all lens.Thereby, in a location circulation, can read many data pages.For example, for lenticule and lighting device matrix,, then can read 25 pages if we select 5 * 5 forms.This solution allows to reduce the positioning time when using single FRD, thereby significantly improves the speed of data switching stream.
When equipment was finished reading of information sectors (information sectors is made up of all data pages in the visual field of matrix of microlenses), card returned its initial position,, returns the reading according to position transducer that is, has the position of 0 coordinate.This card (perhaps microlens array) moves a certain distance along optical axis, and described a certain distance equals interfloor distance.The process that repetition was carried out in the stage 1～3 in new one deck.
Thereby the major advantage of the optical texture of describing in this document is to read 25 data pages under the situation that no any machinery moves.This card is moved the distance of 200mmc as single individuality subsequently, can realize reading under any other situation about moving need not once more.The data page reading frequency must be synchronous with the operating frequency of the matrix that is made of optical fiber receive module.
By the direct vertical moving of optical card (910), perhaps, can realize along the rearrangement that blocks each layer by adopting compensator (933) (the identical thin plates of distance between thickness and each layer (121) or the extendible wedge (122) that piles up etc.).Second method is more desirable, because it has eliminated the aberration that the change owing to optical thickness causes, limited by the operating distance of optical system along the rearrangement degree of depth of each layer.Adaptive optical element, for example the use of LCD space light modulator (123) also is possible.This method seems more promising, because under this selection, single equipment carries out two operations simultaneously: readjust and keep focusing on (automatic focus).
We need two light filters to come filtering LED radiation.A light filter places between (bluring) matrix and the fluorescence card, so that cut a part of LED radiation video picture overlapping with the dye fluorescence video picture.Second wave filter is placed between matrix of microlenses and the field lens, so that filtering is by the LED radiation of the remainder of data carrier fluorescence generation.Another kind of select to comprise employing based on liquid crystal, the Notch type reflection video picture light filter that can adjust according to electrical way.These light filters are installed in (before optical pickup apparatus) in the fetch equipment, and carry out along the work of video picture filtering radiation.
When in CCD camera coverage, moving horizontally card (perhaps when the time), successively carry out fluorescence (42) and non-fluorescence (43) square shaped cells (pit) identification (Fig. 4) in each data Layer of multilayer optical card along the mobile CCD-camera coverage of card.Movement velocity and channel bit and camera frame rate are synchronous.In this case, each that can discern each vertical row simultaneously is to adjacent cells (base unit of Fig. 4 middle and upper part band and the upper unit of bottom band).
If the signal of receiving from some pixel of the CCD-camera of the relevant squares unit that covers the fluorescence data layer surpasses certain level L simultaneously
1, then these two unit all are read as information pits.If two signals all do not surpass certain level L
2＜L
1, then these two unit are not information pits.But when above-cited two requirements are not satisfied, the unit configuration information pit that signal is stronger, and the more weak unit of signal configuration information pit not.L
1And L
2Preestablished.They depend on channel bit length, the ratio between information bit (fluorescence labeling) value and the CCD camera standard pixel value.They also depend on and read radiation wavelength, lens numerical aperture and amplification coefficient thereof.For specific fetch equipment, these numerical value can be considered to fix.
We suppose I
nAnd I
mBe respectively the numerical value that has the information bit position and do not have fluorescence signal in the information bit position.Proved in the wide variation scope of fetch equipment parameter the accuracy of identification C=(I of ETT situation (the two-dimensional encoded method of information)
n-I
t)=(I
2-I
m) surpass the respective value of dvd system, thereby when reading by the CCD camera, and the probability of the data read error when utilizing the ETT code that information is encoded is less than the probability of error when being read by the DVD CD.
Referring to the example among Figure 12-14, Figure 12-14 has represented the initial calculation machine image with the data carry synusia section of the multilayer fluorescence card of EET code compiling, λ=0.65mmc here, NA=0.65 (Figure 12); The computer picture (Figure 13) of the described data carry synusia section that forms by the optical read device on the plane that is arranged in CCD camera coverage and the real image of the same fragment that the CCD camera reads.The subsequent treatment of last image will allow us to recover the initial pictures of this fragment, and probability equals 1 (Figure 14).
Claims (3)
1, a kind of multilayer fluorescent optics storage medium comprises:
A plurality of data Layers; With
A plurality of fluorescence pits on each layer of described a plurality of data Layers;
Pit on wherein organizing every layer is so that form a plurality of frames.
2, method for recording information in the described medium of claim 1 is wherein utilized the 8-10 sign indicating number, and information is recorded in the medium.
3, the method for the media reproducing information of accessory rights requirement 1, the corresponding frame on wherein a plurality of data Layers forms the frame that piles up, and wherein by changing the focus of read head, need not to be parallel to media plane and moves read head, reads the information in each frame that piles up.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US30378301P | 2001-07-10 | 2001-07-10 | |
| US60/303,783 | 2001-07-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1608274A true CN1608274A (en) | 2005-04-20 |
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ID=23173674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02817297 Pending CN1608274A (en) | 2001-07-10 | 2002-07-10 | Optical memory system for information retrieval from fluorescent multilayer optical clear card of the ROM-type |
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| Country | Link |
|---|---|
| EP (1) | EP1428173A4 (en) |
| JP (1) | JP2004535027A (en) |
| CN (1) | CN1608274A (en) |
| WO (1) | WO2003007230A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102791220A (en) * | 2010-03-16 | 2012-11-21 | 塞隆纳牙科系统有限责任公司 | Blank with coding for producing shaped parts for use in dentistry, and method for identifying a blank |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006003537A2 (en) * | 2004-06-28 | 2006-01-12 | Koninklijke Philips Electronics N.V. | Apparatus for reading an information carrier |
| KR101911702B1 (en) | 2011-06-09 | 2018-10-25 | 케이스 웨스턴 리저브 유니버시티 | Optical information storage medium |
| WO2014097009A1 (en) | 2012-12-21 | 2014-06-26 | ABRAMSON, Lance | A method of determining the attendance of an individual at a location and a system therefor |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63195838A (en) * | 1987-02-10 | 1988-08-12 | Canon Inc | Optical information recording carrier |
| JP3353381B2 (en) * | 1993-04-23 | 2002-12-03 | ソニー株式会社 | Recording and playback device |
| US5838653A (en) * | 1995-10-04 | 1998-11-17 | Reveo, Inc. | Multiple layer optical recording media and method and system for recording and reproducing information using the same |
| US6071671A (en) * | 1996-12-05 | 2000-06-06 | Omd Devices Llc | Fluorescent optical memory |
| US6009065A (en) * | 1996-12-05 | 1999-12-28 | Omd Optical Memory Devices Ltd. | Optical pickup for 3-D data storage reading from the multilayer fluorescent optical disk |
| AU3487200A (en) * | 1999-02-12 | 2000-08-29 | Trid Store Ip, L.L.C. | Multilayer optical information storage medium based on incoherent signal |
| IL129011A0 (en) * | 1999-03-16 | 2000-02-17 | Omd Devices L L C | Multi-layered optical information carriers with fluorescent reading and methods of their production |
| AU3970901A (en) * | 1999-11-30 | 2001-06-12 | Trid Store Ip, L.L.C. | Fluorescent multilayer data storage with high capacity and high data rate |
| WO2002011050A2 (en) * | 2000-07-31 | 2002-02-07 | Trid Store Ip Llc | Method for data reading/writing using an optical carrier with pattern information pits |
-
2002
- 2002-07-10 EP EP02752214A patent/EP1428173A4/en not_active Withdrawn
- 2002-07-10 WO PCT/US2002/021576 patent/WO2003007230A2/en not_active Application Discontinuation
- 2002-07-10 CN CN 02817297 patent/CN1608274A/en active Pending
- 2002-07-10 JP JP2003512918A patent/JP2004535027A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102791220A (en) * | 2010-03-16 | 2012-11-21 | 塞隆纳牙科系统有限责任公司 | Blank with coding for producing shaped parts for use in dentistry, and method for identifying a blank |
| CN102791220B (en) * | 2010-03-16 | 2015-11-25 | 西诺德牙科设备有限公司 | There is the blank of the drip molding for processing tooth technology and the method for differentiating blank of coding |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1428173A4 (en) | 2007-06-13 |
| WO2003007230A3 (en) | 2003-04-10 |
| WO2003007230A2 (en) | 2003-01-23 |
| JP2004535027A (en) | 2004-11-18 |
| EP1428173A2 (en) | 2004-06-16 |
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