WO2001041131A9 - Fluorescent multilayer data storage system - Google Patents
Fluorescent multilayer data storage systemInfo
- Publication number
- WO2001041131A9 WO2001041131A9 PCT/US2000/042407 US0042407W WO0141131A9 WO 2001041131 A9 WO2001041131 A9 WO 2001041131A9 US 0042407 W US0042407 W US 0042407W WO 0141131 A9 WO0141131 A9 WO 0141131A9
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical
- information
- reading
- layers
- disk
- 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
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1381—Non-lens elements for altering the properties of the beam, e.g. knife edges, slits, filters or stops
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
-
- 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
-
- 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
- G11B7/08547—Arrangements for positioning the light beam only without moving the head, e.g. using static electro-optical elements
- G11B7/08564—Arrangements for positioning the light beam only without moving the head, e.g. using static electro-optical elements using galvanomirrors
-
- 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
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/0938—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following servo format, e.g. guide tracks, pilot signals
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/13—Optical detectors therefor
- G11B7/131—Arrangement of detectors in a multiple array
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1392—Means for controlling the beam wavefront, e.g. for correction of aberration
- G11B7/13925—Means for controlling the beam wavefront, e.g. for correction of aberration active, e.g. controlled by electrical or mechanical means
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/14—Heads, e.g. forming of the optical beam spot or modulation of the optical beam specially adapted to record on, or to reproduce from, more than one track simultaneously
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
- G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
- G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers
-
- 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
-
- 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
- G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
Definitions
- the present invention is directed to media, systems and methods for
- fluorescent multilayer data storage and more particularly to such media, systems and
- An object of the present invention is to provide an optical information medium
- Another object of the present invention is to provide an apparatus capable of
- Another object of the present invention is to provide principles of optimal
- the first object of the present invention can be attained by a fluorescent
- multilayer optical medium which is realized in the form of an optical card or disk
- each individual information pit is a tradeoff between the
- the second object of the present invention can be attained by a playing
- the apparatus includes two (or more) optical readout heads with a high frame rate (up
- the Gb/s data rate is
- the readout heads have high-speed CCD arrays, and reading is provided by scanning some of the optical heads along the radial directions of a continuously
- the detector photosensitive matrix is organized by the so-called
- TDI time delay and integration
- the array captures a line of image data over a period of time and then transmits the
- Each column is exposed sequentially over a brief time interval.
- a carrier is
- TDI operation increases the total array exposure time by a factor 32, 64, 72, 96, or 144
- the present invention further provides a new
- the third object of the present invention is attained by numerical modeling of
- Fig. 2 Readout head.
- Fig. 1 demonstrates the principle of reading information stored in the
- multilayer optical card 101 by several readout heads 103 under the control of step-
- movers 105 each of which can move along the X and Y axes.
- one of the readout heads 103 reads page by page from a certain
- the time of moving from layer to layer is much shorter than the time of lateral moving from column to column.
- the card has 50 layers with size 16x16 cm 2 .
- the distance between layers is
- the page size is 0.4x0.4 ⁇ 2 . Hence the data density is 80 MB/cm 2 .
- the page size is
- the page has 1000x1000 bits.
- the time to move from layer to layer is 0.6 ms.
- time to move from column to column is 50 ms.
- the positioning is 50 ms.
- the light wavelength is 0.5 ⁇ .
- the laser power is 10 mW.
- the matrix has 2000x2000 pixels, and the frame rate is 1000 frames/s.
- photoelectrons per pixel is 10,000.
- the oversampling is 4 pixels per pit.
- this device has an information capacity of 1 TB and a readout
- the head 103 moves to the next column; meanwhile, the other head 103
- Fig. 2 is a readout head according to embodiment of a second aspect of the
- the optical head has a laser or LED source 201, collimator 202,
- dichroic mirror 203 dichroic mirror 203, objective 204, corrector 205 (optional) compensating aberrations,
- fluorescent multilayer card 206 connected with mechanical mover, filter 207 for
- cylindric lens 209 forming rectangular shape of light spot, and CCD matrix 210.
- the autofocusing is realized by wobbling the micro-objective 204 in the vertical direction.
- the oscillation produces a signal indicating a focusing error.
- this group of pixels can be significantly higher than the frame rate of the information
- Fig. 3 demonstrates the principle of reading from a continuously rotating
- the information is stored in the form of circular or spiral tracks
- the parallel reading is realized by using several readout
- each head 305 the exciting light of a laser or LED is formed in a light
- a CCD array or TDI matrix 309 is used as the photosensor.
- 311 images information stored in several tracks onto the CCD or TDI array.
- Each head 305 is based on a conventional astigmatic auto-focusing system.
- Each head 305 is based on a conventional astigmatic auto-focusing system.
- the head is movable in a radial direction R by a step-mover 313.
- the head could be
- the carrier is an optical card which moves
- the average data rate is about 100
- the information is stored in the form of a plurality of pages 405 written
- the reading is realized by scanning in the depth.
- the readout head moves
- exciting pulse is emitted when the readout head is positioned above the pages of the
- rotating of the disk is equal to the distance between neighboring columns of pages.
- the CCD matrix has 2000x2000 pixels
- the layer to layer takes 0.5 ms.
- the disk has 300 mm diameter and 30 layers.
- date rate is 1 Gb/s.
- the typical scanning rate is of 80 kHz. During the scanning
- the linear velocity must be less than
- the imaging length of 400 micron provides the reading of 600 bits per
- the readout bit rate is 48 Mb/s.
- disk 501 shown in Fig. 5, has a plurality of readout heads 503, of which each reads its
- the individual readout head 503 has the same design as a readout
- the intensity of the fluorescent signal is several orders of magnitude
- step-like motion of the carrier or the readout head is step-like
- the TDI technology is capable of
- an embodiment of the present invention provides a
- One element of this embodiment is that the drive 600, in which the carrier (disk or
- the information is stored in the form of a plurality of pages
- the optical head 604 has an actuator 606 with an
- actuator 606 can move in all three directions. Thus, in the XY plane it could perform
- the actuator 606 moves with the
- optical card 602 moves continuously along
- the actuator 606 with a mirror 614 and objective 608 moves
- the platform with the optical head moves along the Z coordinate providing focusing.
- the optical card is fixed, and the platform with the optical head can move along the X direction continuously and
- the autofocusing is provided by wobbling of the objective around the position
- the frequency of the sequence of servo pulses must be higher than the period
- the focusing signal is integrated from a special part of the CCD matrix
- the optical head is fixed, and the optical card moves
- the information is read in depth by refocusing from one layer to another.
- the technique based on following the optical card actuator can be applied to a
- exciting light and NA is the numerical aperture.
- optical storage because of low tolerance to thickness of the information media.
- NA 0.65
- the distance between layers is 40 ⁇ , as it is in the DVD standard, only
- the optimal numerical aperture is close to 0.4, and for a distance between layers of 20
- FIG. 8 A laser or other light
- source 801 emits a beam 802, which passes through a collimating lens 803 and is
- first scanning turning, movable
- the beam passes through a cylindrical lens 805 and is directed by a
- dichroic mirror 806 onto a second scanning mirror 807 and thence is focused by a
- the dichroic mirror 806 onto a filter 810, which filters out parasitic reflections at the
- fluorescent light 811 is focused by a lens 812 and is directed by a third scanning
- Data are read through step-wise moving of the card 809 in the X direction and
- microobjective 808 in the Z direction Data are read page by page.
- scanning mirrors 804 and 807 can be replaced by a single scanning mirror which
- Optical elements can be
- the moving part 815 of the optical head can include the mirror 807 and
- the filter 810 can be eliminated if the refractive indices of the layers of the card 809 are matched perfectly, so as to eliminate parasitic
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU39709/01A AU3970901A (en) | 1999-11-30 | 2000-11-30 | Fluorescent multilayer data storage with high capacity and high data rate |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16789599P | 1999-11-30 | 1999-11-30 | |
US16789699P | 1999-11-30 | 1999-11-30 | |
US16789499P | 1999-11-30 | 1999-11-30 | |
US16790099P | 1999-11-30 | 1999-11-30 | |
US60/167,896 | 1999-11-30 | ||
US60/167,895 | 1999-11-30 | ||
US60/167,894 | 1999-11-30 | ||
US60/167,900 | 1999-11-30 |
Publications (3)
Publication Number | Publication Date |
---|---|
WO2001041131A2 WO2001041131A2 (en) | 2001-06-07 |
WO2001041131A3 WO2001041131A3 (en) | 2002-01-10 |
WO2001041131A9 true WO2001041131A9 (en) | 2002-08-15 |
Family
ID=27496769
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2000/042407 WO2001041131A2 (en) | 1999-11-30 | 2000-11-30 | Fluorescent multilayer data storage system |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU3970901A (en) |
WO (1) | WO2001041131A2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1608274A (en) * | 2001-07-10 | 2005-04-20 | 特莱第存储Ip有限责任公司 | Optical memory system for information retrieval from fluorescent multilayer optical clear card of the ROM-type |
JP4276516B2 (en) * | 2003-10-20 | 2009-06-10 | パイオニア株式会社 | Multilayer optical recording medium and optical pickup device |
KR102146842B1 (en) | 2011-06-09 | 2020-08-24 | 케이스 웨스턴 리저브 유니버시티 | Optical information storage medium |
EP4141870A1 (en) * | 2021-08-31 | 2023-03-01 | Microsoft Technology Licensing, LLC | Read head and methods for reading multilayer optical data storage media |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5472759A (en) * | 1993-12-16 | 1995-12-05 | Martin Marietta Corporation | Optical volume memory |
KR100200837B1 (en) * | 1995-01-24 | 1999-06-15 | 윤종용 | Optical pickup for multi layer optical disc |
US6071671A (en) * | 1996-12-05 | 2000-06-06 | Omd Devices Llc | Fluorescent optical memory |
WO1998025262A1 (en) * | 1996-12-05 | 1998-06-11 | Omd Devices Llc | Optical pickup for 3-d data storage reading from the multilayer fluorescent optical disk |
-
2000
- 2000-11-30 AU AU39709/01A patent/AU3970901A/en not_active Abandoned
- 2000-11-30 WO PCT/US2000/042407 patent/WO2001041131A2/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
AU3970901A (en) | 2001-06-12 |
WO2001041131A2 (en) | 2001-06-07 |
WO2001041131A3 (en) | 2002-01-10 |
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