SG164894G - Data protection device - Google Patents

Data protection device

Info

Publication number
SG164894G
SG164894G SG164894A SG164894A SG164894G SG 164894 G SG164894 G SG 164894G SG 164894 A SG164894 A SG 164894A SG 164894 A SG164894 A SG 164894A SG 164894 G SG164894 G SG 164894G
Authority
SG
Singapore
Prior art keywords
recorded medium
data
protection device
data storage
data protection
Prior art date
Application number
SG164894A
Other languages
English (en)
Inventor
Guenter Gleim
Original Assignee
Thomson Brandt Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thomson Brandt Gmbh filed Critical Thomson Brandt Gmbh
Priority to SG164894A priority Critical patent/SG164894G/en
Publication of SG164894G publication Critical patent/SG164894G/en

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
    • G11B7/08—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
    • 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
    • G11B7/0948—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 detection and avoidance or compensation of imperfections on the carrier, e.g. dust, scratches, dropouts
    • 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
    • G11B7/0946—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 operation during external perturbations not related to the carrier or servo beam, e.g. vibration

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Air Bags (AREA)
  • Optical Communication System (AREA)
  • Surgical Instruments (AREA)
  • Holo Graphy (AREA)
SG164894A 1987-06-11 1994-11-15 Data protection device SG164894G (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SG164894A SG164894G (en) 1987-06-11 1994-11-15 Data protection device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873719489 DE3719489A1 (de) 1987-06-11 1987-06-11 Geraet zur wiedergabe von daten
SG164894A SG164894G (en) 1987-06-11 1994-11-15 Data protection device

Publications (1)

Publication Number Publication Date
SG164894G true SG164894G (en) 1995-04-28

Family

ID=6329492

Family Applications (1)

Application Number Title Priority Date Filing Date
SG164894A SG164894G (en) 1987-06-11 1994-11-15 Data protection device

Country Status (10)

Country Link
US (1) US5036505A (ja)
EP (1) EP0320509B1 (ja)
JP (1) JP3025276B2 (ja)
KR (1) KR960013489B1 (ja)
AT (1) ATE71467T1 (ja)
DE (2) DE3719489A1 (ja)
HK (1) HK7095A (ja)
HU (1) HU208878B (ja)
SG (1) SG164894G (ja)
WO (1) WO1988009988A1 (ja)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PT671742E (pt) * 1991-06-07 2000-04-28 Thomson Brandt Gmbh Sinalizacao do tipo de erro em suportes de informacao opticos
US5627818A (en) * 1992-10-13 1997-05-06 International Business Machines Corporation Optical disk with marks used for calibrating an optical detector to minimize noise from undesired perturbations in disk surfaces
US5283775A (en) * 1992-12-14 1994-02-01 International Business Machines, Inc. Split detector system for direct read-while-write operation on magneto-optic media
JP3288133B2 (ja) * 1993-05-20 2002-06-04 キヤノン株式会社 光情報記録再生装置
KR100636116B1 (ko) 1999-12-02 2006-10-18 삼성전자주식회사 디스크 종류 판단방법 및 장치
KR100524951B1 (ko) * 2003-03-07 2005-11-01 삼성전자주식회사 이득 선택 스위치가 없는 광픽업의 ｆｐｄ와 그를포함하는 광픽업 장치 및 광 기록 재생 기기
CA2498692A1 (en) * 2003-03-31 2004-10-14 Samsung Electronics Co., Ltd. Apparatus for use with information storage medium containing enhanced av (enav) buffer configuration information, reproducing method thereof and method for managing the buffer
US8552356B2 (en) * 2010-03-01 2013-10-08 Pratt & Whitney Rocketdyne, Inc. Optical power converter
US9972353B1 (en) * 2017-05-08 2018-05-15 Seagate Technology Llc Shingled magnetic recording storage system during vibration
US10460760B2 (en) 2017-07-21 2019-10-29 Seagate Technology Llc Shingled magnetic recording storage system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5848209A (ja) * 1981-09-14 1983-03-22 Sony Corp 情報信号有無判別回路装置
JPS5938936A (ja) * 1982-08-28 1984-03-03 Sony Corp 情報再生装置のサ−ボコントロ−ル回路
JPS59146487A (ja) * 1983-02-12 1984-08-22 Pioneer Electronic Corp トラツキングサ−ボ信号発生回路
JPS59178629A (ja) * 1983-03-30 1984-10-09 Hitachi Ltd デイスク再生装置のサ−ボ回路
JPS6074129A (ja) * 1983-09-30 1985-04-26 Sony Corp 光学式デイスクのトラツキングサ−ボ回路
JP2724996B2 (ja) * 1983-12-20 1998-03-09 パイオニア株式会社 相対位置検出装置
JPS6185633A (ja) * 1984-09-30 1986-05-01 Toshiba Corp 光学式記録再生装置におけるシヨツク保護装置

Also Published As

Publication number Publication date
DE3867612D1 (de) 1992-02-20
KR960013489B1 (ko) 1996-10-05
JP3025276B2 (ja) 2000-03-27
DE3719489A1 (de) 1988-12-29
HU208878B (en) 1994-01-28
WO1988009988A1 (en) 1988-12-15
JPH01503656A (ja) 1989-12-07
US5036505A (en) 1991-07-30
EP0320509A1 (de) 1989-06-21
EP0320509B1 (de) 1992-01-08
KR890702191A (ko) 1989-12-23
ATE71467T1 (de) 1992-01-15
HK7095A (en) 1995-01-27

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