WO2001095319A1 - Verfahren zum herstellen eines datenspeichers - Google Patents
Verfahren zum herstellen eines datenspeichers Download PDFInfo
- Publication number
- WO2001095319A1 WO2001095319A1 PCT/EP2001/005874 EP0105874W WO0195319A1 WO 2001095319 A1 WO2001095319 A1 WO 2001095319A1 EP 0105874 W EP0105874 W EP 0105874W WO 0195319 A1 WO0195319 A1 WO 0195319A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polymer film
- absorber
- imaging plate
- polymer
- film
- Prior art date
Links
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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
- G11B7/245—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing a polymeric component
-
- 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
- G11B7/0025—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with cylinders or cylinder-like carriers or cylindrical sections or flat carriers loaded onto a cylindrical surface, e.g. truncated cones
-
- 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
- G11B7/003—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with webs, filaments or wires, e.g. belts, spooled tapes or films of quasi-infinite extent
-
- 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
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
-
- 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
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
Definitions
- the invention relates to a method for producing a data memory with an optically writable and readable information carrier.
- a data memory with an optically writable and readable information carrier which has a polymer film, the refractive index of which can be changed locally by heating. If the polymer film is locally heated with the aid of a writing beam, the change in the refractive index results in a change in the reflectivity (reflectivity) at the point under consideration. This can be used to store information.
- a reading beam is used to read out the information, which is more strongly reflected by locations with increased reflectivity, which can be measured in order to record the information.
- the polymer film which consists for example of polypropylene (the material for the product marketed by Beiersdorf AG under the name "tesafilm crystal clear”), can be pre-stretched in both surface directions during production, which results in a high material Own energy is stored.
- the material of this type of polymer film is strongly changed (compression) by reshaping, the refractive index changing in the desired manner.
- an absorber for example a dye
- an absorber can be contained in an adhesion layer adjacent to the polymer film, which absorber preferably absorbs and emits the heat generated locally to the polymer film. With the aid of an absorber, a sufficiently large change in the refractive index (for example a change of approximately 0.2) can be achieved with a relatively low intensity of the write beam.
- the polymer film of the known data storage device is wound in several layers in a spiral manner on a winding core, an adhesive layer being arranged between adjacent polymer film layers.
- the winding core can be optically transparent and have a cutout in its central area which serves to receive the writing and reading device of a data drive.
- the read and write device is moved relative to the data memory while the data memory is at rest, so that the data memory does not have to be balanced with regard to a rapid rotational movement.
- the polymer film cannot be used directly as a memory film, but rather that the adhesive layer containing the absorber must first be applied to the polymer film in a complex separate process step.
- the adhesive layer containing the absorber In order to introduce a sufficient amount of absorber, an undesirably large layer thickness of the adhesive layer is also required, which is necessary to achieve a sufficient adhesive force Layer thickness exceeds and the optical transparency of the data storage impaired.
- the method according to the invention is used to produce a data memory with an optically writable and readable information carrier which has a polymer film, the refractive index of which can be changed locally by heating.
- the polymer film is assigned an absorber which is set up to at least partially absorb a write beam and to at least partially emit the heat generated thereby locally to the polymer film.
- an image plate is produced which has the polymer film and the absorber assigned to the polymer film. The imaging plate is then arranged to the geometry provided in the data memory.
- the absorber can be provided in such an amount per unit area of the imaging plate that a desired optical density of the imaging plate can be set without influencing the thickness of any adhesive layer.
- the optical density during absorption is the product of the extinction coefficient (concentration-independent material constant) of the absorber, its concentration and the irradiated layer thickness and is one for characterizing the Absorption behavior well suited size.
- the optical density at the light wavelength of a write beam is preferably in the range from 0.1 to 0.3 for one layer of the imaging plate, but can also be smaller or larger.
- the polymer film is extruded together with a layer which contains absorbers and is arranged on the polymer film when the imaging plate is produced.
- the layer containing absorber preferably has a binder in addition to the absorber in order to adhere to the polymer film.
- This method has the advantage that the absorber is separated from the polymer film and can therefore have little or no influence on its properties. It is also possible to use absorbers which cannot be distributed homogeneously in the polymer for the polymer film. If the layer containing the absorber is heated locally with the aid of a writing beam, the heat is passed on in particular into the adjacent surface zone of the polymer film, so that the information is stored primarily in this surface zone.
- the absorber is admixed with the polymer for the polymer film when the storage film is produced, and then a unit composed of polymer film and absorber is extruded from the polymer containing the absorber.
- the image plate is a polymer film that contains absorbers in addition to the base polymer.
- This method has the advantage that the absorber is generally distributed evenly in the polymer and therefore releases the heat released when absorbing a writing beam directly to the polymer.
- the information can therefore be stored anywhere within the imaging plate, for example, viewed in the direction of the thickness of the imaging plate, also in the middle, and not only at the interface between a polymer foil and an absorber layer. Since the absorber is mixed into the polymer, a high degree of homogeneity in the distribution of the absorber can be achieved. However, absorber dyes (see below) are also required that can withstand the conditions during extrusion (for example high temperature, high pressure).
- the polymer film is first extruded when the storage film is produced, and then the absorber is introduced into the polymer film by a diffusion process.
- This variant also enables the use of absorber dyes that are less temperature-stable. Basically, the advantages are the same as when extruding the imaging plate from a mixture of polymer and absorber. However, a diffusion process generally cannot easily achieve such good homogeneity in the distribution of the absorber within the polymer as in the mixing process explained above.
- the polymer film is swollen in a solution containing the absorber, and then the solvent is evaporated.
- the absorber is converted into the gas phase and the polymer film is exposed to a gas that contains the absorber.
- the molecules of the absorber diffuse into the polymer film.
- This variant is particularly suitable for absorbers that sublimate, i.e. change directly from the solid state to the gaseous state, such as iodine.
- Polypropylene for example, is suitable as a polymer for the polymer film, but other materials are also conceivable.
- the imaging plate has a polymer film made of biaxially stretched polymer (for example polypropylene), in the previously explained methods in which the imaging plate is made of polymer and absorber is made by extrusion, the extrudate is biaxially stretched after extrusion. If, on the other hand, the absorber is introduced into the polymer film by means of a diffusion process, the polymer film can be biaxially stretched before carrying out or after carrying out this diffusion process.
- the image plate or polymer film is stretched biaxially by being biased in its plane in two perpendicular directions during manufacture. This means that a high energy density is stored in the film material.
- a strong material change for example a material compression
- the change in the refractive index in the region which is locally heated by a write beam is preferably of the order of magnitude of 0.2. This leads to a change in the local reflectivity, which can be easily detected with the aid of a reading beam.
- Dyes such as disperse red 1, anthraquinone dyes or indanthrene dyes are suitable as absorbers. Mixtures of different absorber dyes are also conceivable. Anthraquinone dyes and indanthrene dyes have a higher temperature stability than disperse red 1 and therefore offer advantages if the imaging plate is manufactured using an extrusion process.
- the method according to the invention can be used to produce a data memory in which the imaging plate is arranged in a single layer.
- the imaging plate is arranged in several layers, through which information can be written into or from a preselected image plate layer preselected image plate position is readable. This results in a high storage density.
- a write or read device as is known in principle, for example, from DVD technology, information can be written into and read from this layer of memory plate in a targeted manner.
- the write beam is defocused in the storage film layers adjacent to the storage film layer under consideration, so that the adjacent storage film layers are locally only slightly heated and the stored information is not changed there.
- One way of arranging the image plate in multiple layers is to wind a coherent image plate in a spiral.
- the imaging plate is preferably wound onto a central, optically transparent core which is set up to accommodate a writing and reading device of a drive which is matched to the data memory.
- a data store produced in this way can be used in a drive in which a write and / or read beam moves in the interior of the core while the data store is at rest. The data memory therefore does not have to be balanced with regard to a rapid rotary movement.
- An adhesive layer is preferably arranged between adjacent image plate layers in order to fix the image plate layers to one another.
- the adhesive layer can, for example, be applied to the storage film after the storage film has been produced and before or when the storage film is arranged to the geometry provided in the data storage device.
- the refractive index of the adhesive layer preferably deviates only slightly from the refractive index of the imaging plate in order to minimize disturbing reflections from a reading beam or a writing beam at a boundary layer between an imaging plate layer and an adjacent adhesive layer. It is particularly advantageous if the difference in refractive indices is less than 0.005. On existing difference in refractive indices can, however, be used to format the data memory.
- FIG. 1 shows a schematic view of a data storage device produced by the method according to the invention, which has a spirally wound storage film, parts of a drive adapted to the data storage device being arranged in a cutout in the central area of the data storage device, and
- FIG. 2 shows a schematic illustration of an extruder head with which the imaging plate of the data memory from FIG. 1 is extruded.
- FIG. 1 shows a schematic representation of a data store 1 and a write and read device 2 of a drive matched to the data store 1.
- the data storage device 1 has a number of layers 10 of a storage film 11 which is used for information storage and which is wound spirally around an optically transparent core.
- the core is not shown in FIG. 1 for the sake of clarity; it is located within the innermost layer 10.
- the individual layers 10 of the imaging plate 11 are shown in FIG. 1 as concentric circular rings, although the layers 10 are formed by spiral winding of the imaging plate 11.
- An adhesive layer 12 is arranged between adjacent layers 10 of the imaging plate 11; the adhesive layers 12 are all connected and overall also have a spiral course.
- the adhesive layers 12 are shown in FIG. 1 in a thickness that is not to scale.
- the imaging plate 11 consists of biaxially oriented polypropylene with an absorber layer that contains an absorber dye, as explained in more detail below with reference to FIG. 2.
- the imaging plate 11 has a total thickness of 35 ⁇ m; other thicknesses in the range from 10 ⁇ m to 100 ⁇ m or thicknesses outside this range are also conceivable.
- the adhesive layers 12 are free of gas bubbles and, in the exemplary embodiment, consist of acrylate adhesive with a thickness of 5 ⁇ m, preferred layer thicknesses being between 1 ⁇ m and 40 ⁇ m.
- the data memory 1 contains twenty layers 10 of the image plate 11 and has an outer diameter of approximately 30 mm. Its height is 19 mm. A different number of layers 10 or other dimensions are also possible.
- the number of windings or layers 10 can be, for example, between ten and thirty, but can also be greater than thirty.
- the read and write device 2 arranged in a recess in the central area of the core of the data memory 1 contains a read and write head 20 which can be rotated with the aid of a mechanism 21 in the directions of the arrows shown and moved axially back and forth.
- the write and read head 20 has optical elements, with the aid of which a light beam (for example of the wavelength 630 n or 532 nm) generated by a laser not shown in FIG. 1 can be focused on the individual layers 10 of the image plate 11. Since the read and write head 20 is moved by means of the mechanism 21, it can completely scan all layers 10 of the data memory 1. In the exemplary embodiment, the data memory 1 is at rest.
- FIG. 1 the elements provided for balancing the read and write head 20 are not shown.
- the laser mentioned is located outside the and read head 20 and is stationary; the laser beam is directed into the read and write head 20 via optical elements.
- the laser in the exemplary embodiment is operated with a beam power of approximately 1 mW.
- the laser beam serves as a write beam and is focused on a preselected layer 10 of the imaging plate 11 so that the beam spot is less than 1 ⁇ ra, the light energy being introduced in the form of short pulses of approximately 10 ⁇ s duration.
- the energy of the write beam is absorbed in the beam spot, favored by the absorber in the imaging plate 11, which leads to local heating of the imaging plate 11 and thus to a local change in the refractive index and the reflectivity.
- the laser In order to read stored information from the data memory 1, the laser is operated in continuous wave mode (CW mode). Depending on the stored information, the reading beam focused on the desired location is reflected, and the intensity of the reflected beam is detected by a detector in the writing and reading device 2.
- CW mode continuous wave mode
- the information units are formed in the image plate 11 by changing the optical properties in an area with a preferred size of less than 1 ⁇ m.
- the information can be stored in binary form, ie the local reflectivity only takes two values at the location of an information unit. This means that if the reflectivity is above a defined threshold value, a "1" is stored, for example, at the position of the information carrier under consideration, and if it is below this threshold value or below another, lower threshold value, correspondingly a "0". However, it is also conceivable to save the information in several gray levels. This is possible if the reflectivity of the image plate at the location of an information unit changes due to - left
- nated setting of the refractive index can be changed in a targeted manner, without reaching saturation.
- FIG. 2 schematically illustrates how a polymer film is extruded together with an absorber layer arranged on the polymer film in order to produce the storage film 11 of the data memory 1 from FIG. 1.
- the extruder used for this has an extruder head 30 with two outlet openings, from which a polymer 32 (in the exemplary embodiment polypropylene) and an absorber composition 33 (see below) emerge at an elevated temperature. These two starting materials converge behind the extruder head 30 and form two layers during cooling, namely the polymer film denoted by 34 and the absorber layer denoted by 35.
- the polymer film 34 and the absorber layer 35 adhere to one another and form the storage film 11. More specifically, the storage film 11 is formed by the biaxially stretching of the extrudate after the extrusion.
- the polymer film 34 becomes a film made of biaxially oriented polypropylene (BOPP), a material in which a high level of self-energy is stored (see above).
- BOPP biaxially oriented polypropylene
- the extruder head 30 has a temperature of 120-150 ° C.
- a mixture of 0.01-0.1% by weight of the absorber dye Sudan red 7B in acrylate hot melt is used as the absorber mass 33, ie the absorber layer 35 contains the absorber dye Sudan red 7B, which is embedded in the binder acrylate hot melt ,
- the extrudate is stretched by 500% in the longitudinal direction (ie in the direction in which the polymer 32 and the absorber mass 33 emerge from the extruder head 30) and by 700% in the transverse direction.
- the polymer film 34 has a thickness of 20-30 ⁇ m and the absorber layer 35 has a thickness of 10-20 ⁇ m, so that the storage film 11 has a total thickness of 30-50 ⁇ m.
- different manufacturing conditions and different compositions and dimensions are for the individual Layers of the imaging plate possible. It is also conceivable that additional layers are provided.
- the storage film 11 is provided with an adhesive layer and wound onto the optically transparent core mentioned above.
- the absorber is mixed with the polymer for the polymer film.
- the imaging plate is then extruded from the polymer containing the absorber as a unit consisting of polymer film and absorber.
- a mixture of polypropylene and 0.01-0.1% by weight of the absorber dye Sudan red 7B is extruded at a temperature of 120-150 ° C.
- the extrudate is then stretched biaxially, in the longitudinal direction (i.e. in the direction in which the mixture of polymer and absorber-dye emerges from the extruder head) by 500% and in the transverse direction by 700%.
- the image plate created in this way has a thickness of 30-50 ⁇ m and an optical density of 0.1-0.3.
- an adhesive layer e.g. made of an acrylate mass
- an adhesive layer that does not contain any absorber dye is co-extruded together with the image plate.
- a polymer film is first extruded to produce the image plate.
- the absorber is then introduced into the polymer film by means of a diffusion process. If necessary, the polymer or. Image plate before stretching or after performing the diffusion process.
- the polymer film can be placed in a solution which contains the absorber.
- the solvent should dissolve the absorber on the one hand and attack the polymer film so far that it absorbs the solution and swells.
- the absorber molecules are distributed inside the polymer film.
- the polymer film is then removed from the solution and the solvent is evaporated.
- the polymer film essentially returns to its original dimensions, the absorber molecules remaining inside the polymer film.
- Another possibility for a diffusion process is that the absorber is first converted into the gas phase and the polymer film is exposed to a gas which contains the absorber.
- the absorber molecules diffuse into the interior of the polymer film, and some of the absorber molecules remain there as a result of absorption processes.
- the absorber Dispersrot 1 is suitable for a polymer film made of polypropylene.
- DR1 is an azo dye that is known from applications with dye-containing polymer films (especially in the field of nonlinear optics). This absorber is preferably introduced into the polymer film via a diffusion process. If, on the other hand, the image plate is to be produced by extrusion using one of the methods explained above, with temperatures of around 200 ° C. occurring for polypropylene, absorbers with higher temperature stability, such as, for example, anthraquinone or indanthrene dyes, are more suitable than DR1.
- the image plate preferably contains the absorber in an amount or concentration such that one layer of the image plate has an optical density in the range from 0.1 to 0.3.
- the optical density is a measure of the absorption, here based on the light wavelength of a write beam.
- the optical density for a layer of the imaging plate can also be less than 0.1 or greater than 0.3.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Read Only Memory (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Optical Recording Or Reproduction (AREA)
- Manufacturing Optical Record Carriers (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002502774A JP2003535722A (ja) | 2000-06-07 | 2001-05-22 | データ記録媒体を作製する方法 |
EP01953951A EP1295288A1 (de) | 2000-06-07 | 2001-05-22 | Verfahren zum herstellen eines datenspeichers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10028086.2 | 2000-06-07 | ||
DE10028086A DE10028086C2 (de) | 2000-06-07 | 2000-06-07 | Verfahren zum Herstellen eines Datenspeichers |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001095319A1 true WO2001095319A1 (de) | 2001-12-13 |
Family
ID=7644934
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2001/005874 WO2001095319A1 (de) | 2000-06-07 | 2001-05-22 | Verfahren zum herstellen eines datenspeichers |
Country Status (5)
Country | Link |
---|---|
US (1) | US20030141607A1 (de) |
EP (1) | EP1295288A1 (de) |
JP (1) | JP2003535722A (de) |
DE (1) | DE10028086C2 (de) |
WO (1) | WO2001095319A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PL2122419T3 (pl) * | 2007-02-15 | 2015-12-31 | Leibniz Institut Fuer Neue Mat Gemeinnuetzige Gmbh | Sposób przenoszenia struktur powierzchniowych, takich jak warstwy interferencyjne, hologramy i inne wysokoreferencyjne mikrostruktury optyczne |
EP2718930B1 (de) | 2011-06-09 | 2017-05-24 | Case Western Reserve University | Optisches informationsspeichermedium |
US11211091B2 (en) | 2011-06-09 | 2021-12-28 | Case Western Reserve University | Optical information storage medium |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58155543A (ja) * | 1982-03-10 | 1983-09-16 | Toshiba Corp | 情報記録方法 |
JPH03147540A (ja) * | 1989-11-01 | 1991-06-24 | Canon Inc | 光記録媒体用基板の製造方法 |
JPH0546061A (ja) * | 1991-08-21 | 1993-02-26 | Asahi Glass Co Ltd | 体積ホログラム光学フイルム及びその製造方法及びそれを用いた窓 |
DE29816802U1 (de) * | 1998-09-19 | 2000-02-10 | Noehte Steffen | Optischer Datenspeicher |
DE19935776A1 (de) * | 1999-07-26 | 2001-02-08 | Beiersdorf Ag | Datenspeicher |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0697513B2 (ja) * | 1982-01-12 | 1994-11-30 | 大日本インキ化学工業株式会社 | 光記録媒体 |
US4581317A (en) * | 1984-03-01 | 1986-04-08 | E. I. Du Pont De Nemours And Company | Optical recording element |
US4860273A (en) * | 1986-07-31 | 1989-08-22 | Fuji Photo Film Co., Ltd. | Method of recording information and information recording medium employed for the same |
JP2516071B2 (ja) * | 1989-06-23 | 1996-07-10 | 日本ビクター株式会社 | 光記録媒体 |
JPH03168931A (ja) * | 1989-11-27 | 1991-07-22 | Sony Corp | 回転光学ヘッド |
EP0463784B1 (de) * | 1990-06-19 | 1998-10-14 | Canon Kabushiki Kaisha | Optisches Aufzeichnungsmedium, Verfahren zur optischen Aufzeichnung und Verfahren zur optischen Wiedergabe |
US5368789A (en) * | 1990-09-28 | 1994-11-29 | Canon Kabushiki Kaisha | Method for forming substrate sheet for optical recording medium |
EP0519633A1 (de) * | 1991-06-11 | 1992-12-23 | Imperial Chemical Industries Plc | Datenspeichermedien |
JPH05282706A (ja) * | 1991-08-01 | 1993-10-29 | Canon Inc | 光記録媒体とその製造方法及び光記録媒体用基板 |
CA2086467A1 (en) * | 1992-01-07 | 1993-07-08 | Kenji Kato | Optical tape |
JPH07164656A (ja) * | 1993-10-22 | 1995-06-27 | Sony Corp | 記録部構造及び記録装置 |
US5855979A (en) * | 1996-08-08 | 1999-01-05 | Mitsui Chemicals, Inc. | Optical recording medium |
US6168682B1 (en) * | 1998-02-10 | 2001-01-02 | 3M Innovative Properties Company | Method of manufacturing an optical recording medium |
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 |
-
2000
- 2000-06-07 DE DE10028086A patent/DE10028086C2/de not_active Expired - Fee Related
-
2001
- 2001-05-22 US US10/275,916 patent/US20030141607A1/en not_active Abandoned
- 2001-05-22 JP JP2002502774A patent/JP2003535722A/ja not_active Withdrawn
- 2001-05-22 WO PCT/EP2001/005874 patent/WO2001095319A1/de not_active Application Discontinuation
- 2001-05-22 EP EP01953951A patent/EP1295288A1/de not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58155543A (ja) * | 1982-03-10 | 1983-09-16 | Toshiba Corp | 情報記録方法 |
JPH03147540A (ja) * | 1989-11-01 | 1991-06-24 | Canon Inc | 光記録媒体用基板の製造方法 |
JPH0546061A (ja) * | 1991-08-21 | 1993-02-26 | Asahi Glass Co Ltd | 体積ホログラム光学フイルム及びその製造方法及びそれを用いた窓 |
DE29816802U1 (de) * | 1998-09-19 | 2000-02-10 | Noehte Steffen | Optischer Datenspeicher |
DE19935776A1 (de) * | 1999-07-26 | 2001-02-08 | Beiersdorf Ag | Datenspeicher |
Non-Patent Citations (3)
Title |
---|
DATABASE WPI Section Ch Week 199131, Derwent World Patents Index; Class A23, AN 1991-227621, XP002181679 * |
PATENT ABSTRACTS OF JAPAN vol. 007, no. 278 (P - 242) 10 December 1983 (1983-12-10) * |
PATENT ABSTRACTS OF JAPAN vol. 017, no. 341 (P - 1565) 28 June 1993 (1993-06-28) * |
Also Published As
Publication number | Publication date |
---|---|
JP2003535722A (ja) | 2003-12-02 |
EP1295288A1 (de) | 2003-03-26 |
US20030141607A1 (en) | 2003-07-31 |
DE10028086A1 (de) | 2001-12-20 |
DE10028086C2 (de) | 2003-05-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2614606A1 (de) | Rueckprojektionsbildwand | |
EP1323158B1 (de) | Holographischer datenspeicher | |
EP1307881B1 (de) | Holographischer datenspeicher, seine verwendung und verfahren zur dateneingabe | |
EP1395985A1 (de) | Holographischer datenspeicher | |
EP1196915B1 (de) | Datenspeicher | |
DE10028112A1 (de) | Verfahren zum Herstellen eines Datenspeichers | |
EP1198794B1 (de) | Datenspeicher und verfahren zum schreiben von information in einen datenspeicher | |
EP1287523A1 (de) | Datenspeicher | |
DE10028086C2 (de) | Verfahren zum Herstellen eines Datenspeichers | |
DE3607587A1 (de) | Vielkomponentenharzmasse mit temperaturvariablem lichtdurchlaessigkeitsgrad | |
WO2001097216A1 (de) | Datenspeicher | |
DE10008328A1 (de) | Datenspeicher | |
DE2542680A1 (de) | Verfahren zum aufzeichnen von informationen | |
DE1278515B (de) | Thermoplastischer Aufzeichnungstraeger fuer Informationsspeicherung | |
EP1196916B1 (de) | Datenspeicher | |
DE3002911C2 (de) | Optisches Informationsspeichermedium und Verfahren zu seiner Herstellung | |
EP1194926B1 (de) | Zylinderförmiger optischer datenspeicher | |
DE3723416C2 (de) | ||
EP0302374B1 (de) | Dispersionslösung, daraus hergestellte bistabile reversible Dispersionsschicht und deren Verwendung | |
DE19935776A1 (de) | Datenspeicher | |
EP0251119B1 (de) | Lichtempfindliches Aufzeichnungs-material | |
WO2002103690A1 (de) | Verfahren zum eingeben von information in einen optisch beschreibbaren und auslesbaren datenspeicher | |
DE19947782A1 (de) | Datenspeicher | |
DE2707192A1 (de) | Verfahren zur herstellung von rueckstrahlenden elementen fuer strassenmarkierung und bandfoermiges, die genannten rueckstrahlenden elemente umfassendes material fuer strassenmarkierung |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): JP US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2001953951 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref country code: JP Ref document number: 2002 502774 Kind code of ref document: A Format of ref document f/p: F |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10275916 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 2001953951 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 2001953951 Country of ref document: EP |