AT372205B - Geraet fuer die optische wiedergabe von informationssignalen - Google Patents
Geraet fuer die optische wiedergabe von informationssignalenInfo
- Publication number
- AT372205B AT372205B AT0364977A AT364977A AT372205B AT 372205 B AT372205 B AT 372205B AT 0364977 A AT0364977 A AT 0364977A AT 364977 A AT364977 A AT 364977A AT 372205 B AT372205 B AT 372205B
- Authority
- AT
- Austria
- Prior art keywords
- information signals
- optical playback
- playback
- optical
- signals
- 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
- G11B7/13—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
- G11B7/004—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
- G11B7/08—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
- G11B7/0908—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
- G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
-
- 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
- G11B7/0953—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 eccentricity of the disc or disc tracks
-
- 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
- G11B7/0917—Focus-error methods other than those covered by G11B7/0909 - G11B7/0916
- G11B2007/0924—Skewed beams methods (using an angled beam, i.e. a beam which is reflected from the disc at an angle different from 90°)
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Recording Or Reproduction (AREA)
- Automatic Focus Adjustment (AREA)
- Optical Head (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5830776A JPS52141608A (en) | 1976-05-20 | 1976-05-20 | Information detector |
Publications (2)
Publication Number | Publication Date |
---|---|
ATA364977A ATA364977A (de) | 1983-01-15 |
AT372205B true AT372205B (de) | 1983-09-12 |
Family
ID=13080568
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT0364977A AT372205B (de) | 1976-05-20 | 1977-05-20 | Geraet fuer die optische wiedergabe von informationssignalen |
Country Status (9)
Country | Link |
---|---|
US (1) | US4136362A (de) |
JP (1) | JPS52141608A (de) |
AT (1) | AT372205B (de) |
AU (1) | AU509322B2 (de) |
CA (1) | CA1099815A (de) |
DE (1) | DE2722935C2 (de) |
FR (1) | FR2352367B1 (de) |
GB (1) | GB1567551A (de) |
NL (1) | NL7705609A (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL8101932A (nl) * | 1981-04-21 | 1982-11-16 | Philips Nv | Inrichting voor het inschrijven en uitlezen van informatiesporen in een optische registratiedrager. |
JPS58169350A (ja) * | 1982-03-31 | 1983-10-05 | Hitachi Ltd | 光学的情報記録再生装置 |
USRE32660E (en) * | 1982-04-19 | 1988-05-03 | Siscan Systems, Inc. | Confocal optical imaging system with improved signal-to-noise ratio |
JPS5958637A (ja) * | 1982-09-28 | 1984-04-04 | Sony Corp | 光学式再生装置 |
DE3484678D1 (de) * | 1983-11-22 | 1991-07-11 | Toshiba Kawasaki Kk | Optischer kopf. |
JPS61104348A (ja) * | 1984-10-22 | 1986-05-22 | Nec Corp | 光磁気ヘツド |
US4782474A (en) * | 1985-01-31 | 1988-11-01 | Fujitsu Limited | Tracking servo system for controllably projecting an optical beam on an optical disk |
JPS6371945A (ja) * | 1986-09-13 | 1988-04-01 | Omron Tateisi Electronics Co | 光カ−ド記録再生装置 |
US4823220A (en) * | 1987-11-16 | 1989-04-18 | International Business Machines Corporation | Detector for magnetooptic recorders |
US7644273B1 (en) * | 1998-05-20 | 2010-01-05 | Recording Industry Association Of America | Modulation method for minimizing pirating and/or unauthorized copying and/or unauthorized access of/to data on/from data media including compact discs and digital versatile discs |
US6684199B1 (en) | 1998-05-20 | 2004-01-27 | Recording Industry Association Of America | Method for minimizing pirating and/or unauthorized copying and/or unauthorized access of/to data on/from data media including compact discs and digital versatile discs, and system and data media for same |
KR100322599B1 (ko) | 1998-12-23 | 2002-03-08 | 윤종용 | 광픽업장치 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL160138C (nl) * | 1972-05-11 | 1979-09-17 | Philips Nv | Inrichting voor het uitlezen van een vlakke registratie- drager. |
US3952148A (en) * | 1974-03-13 | 1976-04-20 | Zenith Radio Corporation | Optical video disc playback system with position servo |
US4044378A (en) * | 1975-11-04 | 1977-08-23 | Zenith Radio Corporation | Optical system for reflective mode video playback apparatus |
-
1976
- 1976-05-20 JP JP5830776A patent/JPS52141608A/ja active Granted
-
1977
- 1977-05-16 US US05/797,140 patent/US4136362A/en not_active Expired - Lifetime
- 1977-05-16 CA CA278,528A patent/CA1099815A/en not_active Expired
- 1977-05-18 FR FR7715356A patent/FR2352367B1/fr not_active Expired
- 1977-05-18 GB GB20930/77A patent/GB1567551A/en not_active Expired
- 1977-05-20 AU AU25339/77A patent/AU509322B2/en not_active Expired
- 1977-05-20 AT AT0364977A patent/AT372205B/de not_active IP Right Cessation
- 1977-05-20 NL NL7705609A patent/NL7705609A/xx not_active Application Discontinuation
- 1977-05-20 DE DE2722935A patent/DE2722935C2/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2722935C2 (de) | 1985-09-19 |
FR2352367B1 (fr) | 1985-11-29 |
AU509322B2 (en) | 1980-05-08 |
ATA364977A (de) | 1983-01-15 |
GB1567551A (en) | 1980-05-14 |
NL7705609A (nl) | 1977-11-22 |
FR2352367A1 (fr) | 1977-12-16 |
DE2722935A1 (de) | 1977-12-01 |
JPS6160482B2 (de) | 1986-12-20 |
US4136362A (en) | 1979-01-23 |
JPS52141608A (en) | 1977-11-26 |
CA1099815A (en) | 1981-04-21 |
AU2533977A (en) | 1978-11-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ELJ | Ceased due to non-payment of the annual fee | ||
ELJ | Ceased due to non-payment of the annual fee |