IT1285224B1 - Lettore ottico - Google Patents

Lettore ottico

Info

Publication number
IT1285224B1
IT1285224B1 IT96MI001993A ITMI961993A IT1285224B1 IT 1285224 B1 IT1285224 B1 IT 1285224B1 IT 96MI001993 A IT96MI001993 A IT 96MI001993A IT MI961993 A ITMI961993 A IT MI961993A IT 1285224 B1 IT1285224 B1 IT 1285224B1
Authority
IT
Italy
Prior art keywords
optical reader
reader
optical
Prior art date
Application number
IT96MI001993A
Other languages
English (en)
Inventor
Kyung-Hwa Rim
Kun-Ho Cho
Jang-Hoon Yoo
Soo-Yeul Jung
Original Assignee
Samsung Electronics Co Ltd
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 Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of ITMI961993A1 publication Critical patent/ITMI961993A1/it
Application granted granted Critical
Publication of IT1285224B1 publication Critical patent/IT1285224B1/it

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
    • 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
    • G11B7/131—Arrangement of detectors in a multiple array
    • 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
    • G11B7/0909—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 by astigmatic methods
    • 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
    • G11B7/133—Shape of individual detector elements
    • 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
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0006—Recording, reproducing or erasing systems characterised by the structure or type of the carrier adapted for scanning different types of carrier, e.g. CD & DVD

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Glass Compositions (AREA)
  • Holo Graphy (AREA)
IT96MI001993A 1995-10-04 1996-09-27 Lettore ottico IT1285224B1 (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950033912A KR100200857B1 (ko) 1995-10-04 1995-10-04 광픽업장치

Publications (2)

Publication Number Publication Date
ITMI961993A1 ITMI961993A1 (it) 1998-03-27
IT1285224B1 true IT1285224B1 (it) 1998-06-03

Family

ID=19429195

Family Applications (1)

Application Number Title Priority Date Filing Date
IT96MI001993A IT1285224B1 (it) 1995-10-04 1996-09-27 Lettore ottico

Country Status (8)

Country Link
US (1) US5802037A (it)
JP (1) JPH09120557A (it)
KR (1) KR100200857B1 (it)
DE (1) DE19640838B4 (it)
FR (1) FR2739716B1 (it)
GB (1) GB2306070B (it)
IT (1) IT1285224B1 (it)
NL (1) NL1004078C2 (it)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6259668B1 (en) * 1996-02-14 2001-07-10 Samsung Electronics Co., Ltd. Recording/reproducing apparatus having an optical pickup device to read from and record information to disks of different thicknesses
KR100224621B1 (ko) * 1996-09-16 1999-10-15 윤종용 두께가 다른 디스크 호환을 위한 기록재생용 광픽업
KR100195137B1 (ko) * 1996-10-24 1999-06-15 윤종용 호환형 광픽업장치
US6091690A (en) * 1997-02-06 2000-07-18 Matsushita Electric Industrial Co., Ltd. Optical head device and optical information processing apparatus
JPH10233053A (ja) * 1997-02-20 1998-09-02 Alps Electric Co Ltd ディスク判別装置およびディスク判別方法
TW342493B (en) * 1997-04-29 1998-10-11 Ind Tech Res Inst Digital video disc (DVD) optical head with dual-wavelength laser
KR100335408B1 (ko) * 1998-03-03 2002-08-21 삼성전자 주식회사 포커스옵셋조정가능한광픽업장치
JP3123500B2 (ja) * 1998-03-12 2001-01-09 日本電気株式会社 光ディスク装置
DE602005007229D1 (de) * 2004-06-29 2008-07-10 Koninkl Philips Electronics Nv Verfahren und system zur erzeugung von sphärischen aberrationssignalfehlern

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2724305A (en) * 1951-09-04 1955-11-22 Herman F Brandt Apparatus for recording eye movement
FR2266932B1 (it) * 1973-03-02 1977-09-02 Thomson Brandt
FR2235448B1 (it) * 1973-06-29 1976-05-07 Thomson Brandt
GB1603596A (en) * 1977-06-06 1981-11-25 Mca Disco Vision Optical transducer and focusing system
JPH0718761B2 (ja) * 1980-09-19 1995-03-06 株式会社ニコン 測光装置
JPS58208944A (ja) * 1982-05-31 1983-12-05 Sony Corp 光学ヘツド制御信号発生装置
US4641296A (en) * 1983-04-28 1987-02-03 Nippon Kogaku K.K. Optical head for information recording apparatus
US4704024A (en) * 1983-12-09 1987-11-03 Canon Kabushiki Kaisha Photometric circuit for camera
JPS60185230A (ja) * 1984-03-02 1985-09-20 Pioneer Electronic Corp 焦点誤差検出装置
US4737946A (en) * 1984-09-03 1988-04-12 Omron Tateisi Electronics Co. Device for processing optical data with improved optical allignment means
CA1258906A (en) * 1985-04-22 1989-08-29 Hiroshi Oinoue Semiconductor laser apparatus for optical head
JPS63215942A (ja) * 1987-03-04 1988-09-08 Natl Aerospace Lab 粒子径分布計測用光電変換センサ−
US4816665A (en) * 1987-08-06 1989-03-28 Maxtor Corporation Sensor array for focus detection
US5146258A (en) * 1990-12-24 1992-09-08 Eastman Kodak Company Multiple photodiode array for light metering
DE4140806A1 (de) * 1991-12-11 1993-06-17 Thomson Brandt Gmbh Optische abtastvorrichtung
US5281797A (en) * 1991-12-26 1994-01-25 Hitachi, Ltd. Short wavelength optical disk head having a changeable aperture
JPH05325245A (ja) * 1992-05-20 1993-12-10 Olympus Optical Co Ltd 光記録媒体の情報記録／再生装置
JP2532818B2 (ja) * 1993-02-01 1996-09-11 松下電器産業株式会社 対物レンズおよび光ヘッド装置
US5532999A (en) * 1993-06-25 1996-07-02 Matsushita Electric Industrial Co., Ltd. Optical detector having stray carrier absorption regions between light receiving elements, and an optical head using the same
DE69608750T2 (de) * 1995-03-15 2001-02-15 Koninklijke Philips Electronics N.V., Eindhoven Vorrichtung zum optischen abtasten eines auzeichnungsmediums

Also Published As

Publication number Publication date
GB2306070B (en) 2000-02-02
KR100200857B1 (ko) 1999-06-15
ITMI961993A1 (it) 1998-03-27
US5802037A (en) 1998-09-01
JPH09120557A (ja) 1997-05-06
GB2306070A (en) 1997-04-23
FR2739716A1 (fr) 1997-04-11
NL1004078C2 (nl) 1998-01-07
KR970023016A (ko) 1997-05-30
DE19640838A1 (de) 1997-04-10
GB9620678D0 (en) 1996-11-20
FR2739716B1 (fr) 1999-01-08
DE19640838B4 (de) 2010-10-28
NL1004078A1 (nl) 1997-04-08

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Legal Events

Date Code Title Description
0001 Granted