GB8408613D0 - Following recorded tracks on optical discs - Google Patents
Following recorded tracks on optical discsInfo
- Publication number
- GB8408613D0 GB8408613D0 GB848408613A GB8408613A GB8408613D0 GB 8408613 D0 GB8408613 D0 GB 8408613D0 GB 848408613 A GB848408613 A GB 848408613A GB 8408613 A GB8408613 A GB 8408613A GB 8408613 D0 GB8408613 D0 GB 8408613D0
- Authority
- GB
- United Kingdom
- Prior art keywords
- optical discs
- recorded tracks
- following recorded
- following
- tracks
- 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.)
- Withdrawn
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
-
- 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
-
- 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
- G11B7/0901—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 track following only
- G11B7/0903—Multi-beam tracking systems
-
- 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
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US48265383A | 1983-04-05 | 1983-04-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
GB8408613D0 true GB8408613D0 (en) | 1984-05-16 |
GB2137746A GB2137746A (en) | 1984-10-10 |
Family
ID=23916898
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08408613A Withdrawn GB2137746A (en) | 1983-04-05 | 1984-04-04 | Apparatus for Detecting Deviations of Position from a Reference |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPS59207035A (en) |
GB (1) | GB2137746A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5073888A (en) * | 1988-04-21 | 1991-12-17 | Ricoh Company, Ltd. | Optical pickup device |
DE4221705A1 (en) * | 1992-07-02 | 1994-01-05 | Voith Gmbh J M | Hydrostatic machine with axial thrust compensation |
DE4301827A1 (en) * | 1993-01-23 | 1994-07-28 | Thomson Brandt Gmbh | Eliminate scanning interference |
CN101587244B (en) * | 2008-05-20 | 2011-10-05 | 台睿科技股份有限公司 | Device and method for correcting optical system assembling |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2102027C2 (en) * | 1971-01-16 | 1982-12-30 | Ibm Deutschland Gmbh, 7000 Stuttgart | Process for the optical detection of the position of boundary lines and facilities for carrying out the process |
US3865483A (en) * | 1974-03-21 | 1975-02-11 | Ibm | Alignment illumination system |
DE2539206A1 (en) * | 1975-09-03 | 1977-03-17 | Siemens Ag | METHOD FOR AUTOMATIC ADJUSTMENT OF SEMI-CONDUCTOR DISCS |
US4184080A (en) * | 1977-06-30 | 1980-01-15 | Molins Machine Company, Inc. | Ratiometric edge detector system |
-
1984
- 1984-04-04 GB GB08408613A patent/GB2137746A/en not_active Withdrawn
- 1984-04-05 JP JP6835684A patent/JPS59207035A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
GB2137746A (en) | 1984-10-10 |
JPS59207035A (en) | 1984-11-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |