WO1997033275B1 - Methods for optical data storage and apparatus for same - Google Patents
Methods for optical data storage and apparatus for sameInfo
- Publication number
- WO1997033275B1 WO1997033275B1 PCT/NO1997/000067 NO9700067W WO9733275B1 WO 1997033275 B1 WO1997033275 B1 WO 1997033275B1 NO 9700067 W NO9700067 W NO 9700067W WO 9733275 B1 WO9733275 B1 WO 9733275B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- data
- carrying medium
- light
- write
- optical
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title claims abstract 28
- 238000000034 method Methods 0.000 title claims abstract 25
- 238000013500 data storage Methods 0.000 title claims abstract 4
- 238000005286 illumination Methods 0.000 claims abstract 8
- 238000003384 imaging method Methods 0.000 claims abstract 3
- 230000004044 response Effects 0.000 claims abstract 3
- 239000011888 foil Substances 0.000 claims 3
- 239000011159 matrix material Substances 0.000 claims 3
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 230000006870 function Effects 0.000 claims 1
- 230000003595 spectral effect Effects 0.000 claims 1
Abstract
In a method for optical data storage a write/read device is employed with a first optical lens system consisting of an array of lenslets which are associated with one or more areas on a data-carrying medium which forms part of the optical data memory. During writing/reading of data in the data-carrying medium the optical data medium is positioned on one or more reference surfaces. When localizing or reading data which are stored in an optical data memory in this fashion, the data-carrying medium is brought in register with the first optical lens system in the write/read device, whereupon light from the write/read device passes through a set of angular coordinates, the optical response from the data-carrying medium being detected simultaneously and in parallel by means of the write/read device. A device for implementation of the method comprises a write/read device in which there is provided a first optical system (1) consisting of an array of lenslets, one or more light sources (2) for illumination of the lenslets, a second optical system (4) for imaging of the data-carrying medium and an electronic detector (5), the write/read device being further connected to an analysis unit (6).
Claims
1. A method for optical data storage in an optical data memory which comprises data-carrying media in the form of sheets, foils, tapes, cards and disks, either separately or in combination, wherein data are stored in one or more data-carrying layers or volumes in the data-carrying medium/media and written and/or read by means of light, and wherein there is employed in the method a write/read device with a first optical lens system associated with one or more light sources, characterized by forming the first optical lens system from a number of lenslets, arranging the lenslets in an arraylike configuration of lenslets such that the lenslets form a predetermined, freely chosen pattern, positioning the data-carrying medium such that each lenslet is assigned to one or more areas on one of the respective data-carrying media of the optical data memory, and directing light from the light source or light sources through the optical lens system, such that each lenslet directs the light to the respective area(s) associated with it on the data-carrying medium.
2. A method according to claim 1, characterized in that the light is directed towards each lenslet, each lenslet at a given time thereby forming one focal point at a time in a light-sensitive layer or volume in the data-carrying medium.
3. A method according to claim 2, characterized in that the directions of the light are selected within a predetermined set of directions, with the result that the focal spot formed by each lenslet in the light-sensitive layer or volume is located in a position which is uniquely associated with the chosen direction.
4. A method according to claim 1, characterized in that an optical response from the light-sensitive layer(s) or volumes in the data carrier is changed reversibly or irreversibly under the influence of the light directed through first lens systems, whereby data are written on the data-carrying medium.
5. A method for positioning of a data-carrying medium during optical data storage in an optical data memory which comprises data-carrying media in the form of sheets, foils, tapes, cards and disks, either separately or in combination, wherein data are stored in one or more light-sensitive data- carrying layers or volumes in the data-carrying medium/media and written and/or read by means of light, and wherein there is employed in the method a write/read device with a first optical lens system associated with one or more light sources, characterized by positioning the data-carrying medium on at least one reference surface, the position of the data-carrying medium being maintained during at least one cycle which comprises writing and reading respectively or only reading of data in the data-carrying medium.
6. A method according to claim 5, characterized in that one side of a disk is employed as reference surface, the first optical lens system being provided on the opposite side of the disk.
7. A method according to claim 5, characterized in that the position is maintained by holding the data-carrying medium between two reference surfaces.
8. A method according to claim 5, characterized in that the position is maintained by conveying and holding the data-carrying medium against a reference surface by means of electrostatic forces.
9. A method according to claim 5, characterized in that the position is maintained by conveying and holding the data-carrying medium against a reference surface by means of pneumatic forces.
10. A method according to claim 5, wherein a rigid data-carrying medium is employed, characterized in that the position is maintained by conveying and holding the data carrier against pointed or extended surfaces on at least one reference surface.
11. A method according to claim 5, wherein a data-carrying medium is employed which on at least one side is coated with an elastic, transparent layer, characterized in that the position is maintained by a partial compression of the elastic layer(s) when the data-carrying medium is conveyed towards the reference surface or reference surfaces.
12. A method according to claim 5, characterized in that the data-carrying medium for a write/read cycle is actively positioned in the correct position in relation to the first optical line system by means of two or more focus-seeking servos provided on the read/write device.
13. A method according to claim 11 or 12, characterized in that the data-carrying medium is actively positioned by means of translation and/or rotation of the data-carrying medium, the translation and/or rotation being effected by one of the servos exerting varying pressure against different sections of the data-carrying medium, thus causing the elastic layer(s) to be pressed together to varying degrees.
14. A method for localizing data stored or written into an optical data memory which comprises data-carrying media in the form of sheets, foils, tapes, cards and disks, either separately or in combination, wherein data are written and/or read by means of light, wherein there is employed in the method a write/read device with a first optical lens system associated with one or more light sources, and wherein for storage or writing a method is employed as specified in one of the claims 1-4 and a method as specified in one of the claims 5-13, characterized in that in a first stage the method comprises bringing the data- carrying medium in register with the first optical lens system in the write/read device by means of a translational and/or rotational movement generated by servos which are in engagement with the data-carrying medium and controlled by a deviation minimizing program, and in a second stage allowing light from the read/write device to pass through a discrete or continuous set of angular coordinates which are located near one or more sets of reference angle coordinates, the optical response from the data-carrying medium being detected simultaneously and in parallel by means ofthe write/read device as a predetermined set of x,y coordinates, with subsequent generation of angle correction data for all x,y coordinates.
15. A device for implementation of the method according to claims 1-4 and the method according to claim 14, wherein the device comprises a write/read device, characterized in that there is provided in the write/read device a first optical system consisting of an array of lenslets 2', one or more light sources ( 1) arranged for illumination of the lenslets individually or in parallel and with 21
predetermined illumination parameters, with the result that light from the lenslets is directed towards specific areas on a data-carrying medium (3) inserted in the device, a second optical system (4) arranged for imaging of the illuminated data-carrying medium (3), and an electronic matrix detector (5) with light-sensitive elements arranged in a one or two-dimensional pattern for recording the illuminated data-carrying medium (3), and that the write/read device is further connected to a logic unit (6) arranged for analysis of the recorded imaging emitted in the form of signals from the electronic matrix detector (5).
16. A device according to claim 15, characterized in that the predetermined illumination parameters comprise parameters for illumination direction, illumination duration, illumination intensity and the spectral characteristics of the illumination.
17. A device according to claim 15, characterized in that the electronic matrix detector (5) is an electronic camera.
18. A device according to claim 16, characterized in that the logic unit (6) is arranged for control and checking of the write/read device's functions.
19. A device according to claim 15, characterized in that it comprises a holder (9) for the data-carrying medium (3).
20. A device according to claim 19, characterized in that it comprises focus-seeking servos (12), the focus-seeking servos being connected to the holder (9).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU20471/97A AU2047197A (en) | 1996-03-07 | 1997-03-06 | Methods for optical data storage and apparatus for same |
| US09/142,385 US6418092B1 (en) | 1996-03-07 | 1997-03-06 | Methods for optical data storage and apparatus for same |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO960957 | 1996-03-07 | ||
| NO960957A NO302545B1 (en) | 1996-03-07 | 1996-03-07 | Optical data storage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1997033275A1 WO1997033275A1 (en) | 1997-09-12 |
| WO1997033275B1 true WO1997033275B1 (en) | 1997-10-09 |
Family
ID=19899128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/NO1997/000067 WO1997033275A1 (en) | 1996-03-07 | 1997-03-06 | Methods for optical data storage and apparatus for same |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6418092B1 (en) |
| AU (1) | AU2047197A (en) |
| NO (1) | NO302545B1 (en) |
| WO (1) | WO1997033275A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5910940A (en) * | 1996-10-08 | 1999-06-08 | Polaroid Corporation | Storage medium having a layer of micro-optical lenses each lens generating an evanescent field |
| US7256766B2 (en) | 1998-08-27 | 2007-08-14 | E Ink Corporation | Electrophoretic display comprising optical biasing element |
| US8009348B2 (en) | 1999-05-03 | 2011-08-30 | E Ink Corporation | Machine-readable displays |
| US7119759B2 (en) | 1999-05-03 | 2006-10-10 | E Ink Corporation | Machine-readable displays |
| AU2003280089A1 (en) * | 2002-12-18 | 2004-07-09 | Koninklijke Philips Electronics N.V. | Storage medium for the optical storage and retrieval of information |
| WO2004055798A1 (en) * | 2002-12-18 | 2004-07-01 | Koninklijke Philips Electronics N.V. | Storage medium for the optical storage and retrieval of information |
| EP1692705A1 (en) * | 2003-11-28 | 2006-08-23 | Koninklijke Philips Electronics N.V. | Magneto-optical storage medium |
| JP2005251240A (en) * | 2004-03-01 | 2005-09-15 | Canon Inc | Optical recording / reproducing device |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3902788A (en) | 1974-03-13 | 1975-09-02 | Minnesota Mining & Mfg | Optical memory system for reading, writing and erasing information |
| US4550249A (en) * | 1983-04-21 | 1985-10-29 | At&T Bell Laboratories | Optical disc read/write apparatus |
| US4633445A (en) | 1984-12-14 | 1986-12-30 | Xerox Corporation | Eraseable solid state optical memories |
| NO179886C (en) * | 1990-01-31 | 1997-01-08 | Dyno Particles As | Data storage medium and methods for reading and reading data |
| US5379266A (en) * | 1991-12-30 | 1995-01-03 | Information Optics Corporation | Optical random access memory |
| US5483511A (en) | 1993-02-17 | 1996-01-09 | Vixel Corporation | Multiple beam optical memory system with solid-state lasers |
| US5764603A (en) * | 1995-04-25 | 1998-06-09 | M.M.R.I. Photonics Ltd. | Two-dimensional Random Access Scanner for optical disks |
| NO302987B1 (en) | 1995-07-18 | 1998-05-11 | Opticom As | Optical logic element and methods for its preparation and optical addressing, respectively, and use thereof in an optical logic device |
| US5754514A (en) * | 1996-10-08 | 1998-05-19 | Polaroid Corporation | Phase controlled evanescent field systems and methods for optical recording and retrieval |
| US5910940A (en) * | 1996-10-08 | 1999-06-08 | Polaroid Corporation | Storage medium having a layer of micro-optical lenses each lens generating an evanescent field |
| US6078468A (en) * | 1997-05-01 | 2000-06-20 | Fiske; Orlo James | Data storage and/or retrieval methods and apparatuses and components thereof |
-
1996
- 1996-03-07 NO NO960957A patent/NO302545B1/en not_active Application Discontinuation
-
1997
- 1997-03-06 US US09/142,385 patent/US6418092B1/en not_active Expired - Fee Related
- 1997-03-06 AU AU20471/97A patent/AU2047197A/en not_active Abandoned
- 1997-03-06 WO PCT/NO1997/000067 patent/WO1997033275A1/en active Application Filing
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