CA1078060A - Disques multichouches de donnees optiques et appareil de lecture connexe - Google Patents
Disques multichouches de donnees optiques et appareil de lecture connexeInfo
- Publication number
- CA1078060A CA1078060A CA232,631A CA232631A CA1078060A CA 1078060 A CA1078060 A CA 1078060A CA 232631 A CA232631 A CA 232631A CA 1078060 A CA1078060 A CA 1078060A
- Authority
- CA
- Canada
- Prior art keywords
- data
- record
- light
- layers
- accordance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
-
- 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
- G11B7/08—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
-
- 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
-
- 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
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US51645374A | 1974-10-21 | 1974-10-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1078060A true CA1078060A (fr) | 1980-05-20 |
Family
ID=24055665
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA232,631A Expired CA1078060A (fr) | 1974-10-21 | 1975-07-31 | Disques multichouches de donnees optiques et appareil de lecture connexe |
CA342,948A Expired CA1091804A (fr) | 1974-10-21 | 1980-01-03 | Enregistrements optiques multicouches et appareil de lecture |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA342,948A Expired CA1091804A (fr) | 1974-10-21 | 1980-01-03 | Enregistrements optiques multicouches et appareil de lecture |
Country Status (5)
Country | Link |
---|---|
JP (2) | JPS5231610A (fr) |
CA (2) | CA1078060A (fr) |
DE (1) | DE2546941A1 (fr) |
GB (1) | GB1516413A (fr) |
NL (1) | NL7510462A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5373499A (en) * | 1993-07-22 | 1994-12-13 | International Business Machines Corporation | Multilayer optical disk and system having multiple optical paths include identical total disk substrate thickness |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4074085A (en) * | 1976-03-31 | 1978-02-14 | Eli S. Jacobs | Multiple beam optical record playback apparatus for simultaneous scan of plural data tracks |
NL7803069A (nl) * | 1978-03-22 | 1979-09-25 | Philips Nv | Meerlaags informatieschijf. |
FR2488711B1 (fr) * | 1980-08-13 | 1985-06-28 | Thomson Csf | Procede thermo-optique d'inscription d'information et support d'information destine a la mise en oeuvre de ce procede |
JPS59210544A (ja) * | 1983-05-16 | 1984-11-29 | Nec Corp | 光記録媒体 |
US4639745A (en) * | 1984-01-11 | 1987-01-27 | Pioneer Electronic Corporation | Optical recording medium |
US4745484A (en) * | 1986-07-30 | 1988-05-17 | Drexler Technology Corporation | Method and apparatus for stepped imaging in reading data |
EP0434230B1 (fr) * | 1989-11-22 | 1996-05-22 | Sharp Kabushiki Kaisha | Milieu d'enregistrement optique et méthode d'enregistrement et reproduction d'informations sur celui-ci |
US5644555A (en) * | 1995-01-19 | 1997-07-01 | International Business Machines Corporation | Multiple data surface magneto-optical data storage system |
JPH09161320A (ja) * | 1995-12-08 | 1997-06-20 | Nippon Columbia Co Ltd | 貼り合わせ型光情報記録媒体 |
FR2765716B1 (fr) * | 1997-07-02 | 1999-07-30 | Commissariat Energie Atomique | Support d'enregistrement optique a deux niveaux superposes, dispositif d'enregistrement et procede de lecture correspondants |
GB2428130A (en) * | 2005-07-06 | 2007-01-17 | Univ Basel | Photographic storage of digital information |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5229603B2 (fr) * | 1971-08-10 | 1977-08-03 | ||
JPS5828652B2 (ja) * | 1972-12-25 | 1983-06-17 | 萬世工業株式会社 | ヨミトリソウチ |
-
1975
- 1975-07-31 CA CA232,631A patent/CA1078060A/fr not_active Expired
- 1975-08-04 GB GB32589/75A patent/GB1516413A/en not_active Expired
- 1975-09-04 NL NL7510462A patent/NL7510462A/xx not_active Application Discontinuation
- 1975-10-20 DE DE19752546941 patent/DE2546941A1/de not_active Ceased
- 1975-10-21 JP JP50126026A patent/JPS5231610A/ja active Granted
-
1980
- 1980-01-03 CA CA342,948A patent/CA1091804A/fr not_active Expired
-
1984
- 1984-02-17 JP JP59027369A patent/JPS59223949A/ja active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5373499A (en) * | 1993-07-22 | 1994-12-13 | International Business Machines Corporation | Multilayer optical disk and system having multiple optical paths include identical total disk substrate thickness |
Also Published As
Publication number | Publication date |
---|---|
GB1516413A (en) | 1978-07-05 |
JPS59223949A (ja) | 1984-12-15 |
JPS5231610A (en) | 1977-03-10 |
JPS6118392B2 (fr) | 1986-05-12 |
CA1091804A (fr) | 1980-12-16 |
NL7510462A (nl) | 1976-04-23 |
DE2546941A1 (de) | 1976-04-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MKEX | Expiry |