KR860001342A - Optical head tracking error detection device - Google Patents
Optical head tracking error detection deviceInfo
- Publication number
- KR860001342A KR860001342A KR1019850004967A KR850004967A KR860001342A KR 860001342 A KR860001342 A KR 860001342A KR 1019850004967 A KR1019850004967 A KR 1019850004967A KR 850004967 A KR850004967 A KR 850004967A KR 860001342 A KR860001342 A KR 860001342A
- Authority
- KR
- South Korea
- Prior art keywords
- detection device
- error detection
- optical head
- tracking error
- head tracking
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
-
- 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
-
- 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
- G11B7/095—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble
- G11B7/0956—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 specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for tilt, skew, warp or inclination of the disc, i.e. maintain the optical axis at right angles to the disc
-
- 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
- G11B7/127—Lasers; Multiple laser arrays
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59145766A JPH063649B2 (en) | 1984-07-13 | 1984-07-13 | Optical head tracking error detector |
JP145766 | 1984-07-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR860001342A true KR860001342A (en) | 1986-02-26 |
KR940004656B1 KR940004656B1 (en) | 1994-05-27 |
Family
ID=15392663
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019850004967A KR940004656B1 (en) | 1984-07-13 | 1985-07-12 | Tracking error detecting apparatus |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPH063649B2 (en) |
KR (1) | KR940004656B1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63252189A (en) * | 1987-04-10 | 1988-10-19 | 株式会社貝印刃物開発センター | Safety razor |
JPH0198135A (en) * | 1988-09-19 | 1989-04-17 | Sanyo Electric Co Ltd | Optical pickup device |
US5517479A (en) * | 1993-03-26 | 1996-05-14 | Matsushita Electronics Corporation | Optical head including a semiconductor laser having a non-scatter incident area |
JP4093213B2 (en) | 2004-07-29 | 2008-06-04 | 松下電器産業株式会社 | Semiconductor laser device and optical pickup device using the same |
JP5637474B2 (en) * | 2009-12-30 | 2014-12-10 | 国立大学法人 千葉大学 | Beam filter, laser chip including the same, and external cavity laser |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5947778A (en) * | 1982-09-10 | 1984-03-17 | Hitachi Ltd | Semiconductor photo receiving element and laser oscillation device using it |
-
1984
- 1984-07-13 JP JP59145766A patent/JPH063649B2/en not_active Expired - Lifetime
-
1985
- 1985-07-12 KR KR1019850004967A patent/KR940004656B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JPH063649B2 (en) | 1994-01-12 |
KR940004656B1 (en) | 1994-05-27 |
JPS6124031A (en) | 1986-02-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
G160 | Decision to publish patent application | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20040419 Year of fee payment: 11 |
|
LAPS | Lapse due to unpaid annual fee |