JPS6132731B2 - - Google Patents

Info

Publication number
JPS6132731B2
JPS6132731B2 JP54172558A JP17255879A JPS6132731B2 JP S6132731 B2 JPS6132731 B2 JP S6132731B2 JP 54172558 A JP54172558 A JP 54172558A JP 17255879 A JP17255879 A JP 17255879A JP S6132731 B2 JPS6132731 B2 JP S6132731B2
Authority
JP
Japan
Prior art keywords
focus servo
aperture lens
gain
disk
focus
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.)
Expired
Application number
JP54172558A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5694528A (en
Inventor
Shunji Harikae
Tomio Yoshida
Akifumi Nakada
Michoshi Nagashima
Toshio Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP17255879A priority Critical patent/JPS5694528A/ja
Priority to DE3048708A priority patent/DE3048708C2/de
Priority to US06/229,313 priority patent/US4368526A/en
Publication of JPS5694528A publication Critical patent/JPS5694528A/ja
Publication of JPS6132731B2 publication Critical patent/JPS6132731B2/ja
Granted legal-status Critical Current

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
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • 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

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Automatic Focus Adjustment (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
JP17255879A 1979-12-28 1979-12-28 Drawing-in method of focus servo Granted JPS5694528A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP17255879A JPS5694528A (en) 1979-12-28 1979-12-28 Drawing-in method of focus servo
DE3048708A DE3048708C2 (de) 1979-12-28 1980-12-23 Servosteuereinrichtung für ein optisches System
US06/229,313 US4368526A (en) 1979-12-28 1980-12-23 Servo control system for optical system which focuses a converging light beam on a recording disc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17255879A JPS5694528A (en) 1979-12-28 1979-12-28 Drawing-in method of focus servo

Publications (2)

Publication Number Publication Date
JPS5694528A JPS5694528A (en) 1981-07-31
JPS6132731B2 true JPS6132731B2 (en, 2012) 1986-07-29

Family

ID=15944073

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17255879A Granted JPS5694528A (en) 1979-12-28 1979-12-28 Drawing-in method of focus servo

Country Status (3)

Country Link
US (1) US4368526A (en, 2012)
JP (1) JPS5694528A (en, 2012)
DE (1) DE3048708C2 (en, 2012)

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57113428A (en) * 1980-12-29 1982-07-14 Pioneer Video Corp Focus servo device
JPS57120237A (en) * 1981-01-14 1982-07-27 Sony Corp Optical reproducing device
JPS57186239A (en) * 1981-05-11 1982-11-16 Sony Corp Disc reproducing device
JPS5870434A (ja) * 1981-10-22 1983-04-26 Toshiba Corp 光学ヘツド
JPS58101330U (ja) * 1981-12-25 1983-07-09 パイオニア株式会社 光学装置におけるフオ−カスサ−ボ引込装置
JPS58121137A (ja) * 1982-01-09 1983-07-19 Sony Corp 光学式デイスク再生装置のフオ−カス引込み回路
JPS58128031A (ja) * 1982-01-24 1983-07-30 Sony Corp デイスク再生装置
JPS58155527A (ja) * 1982-03-10 1983-09-16 Hitachi Ltd 光デイスクプレ−ヤのフオ−カス引き込み回路
US4674076A (en) * 1982-05-19 1987-06-16 Burroughs Corporation Optical memory system having improved positioning and focusing control circuitry
DE3368794D1 (en) * 1982-05-19 1987-02-05 Burroughs Corp Optical memory system having improved positioning and focusing control circuitry
US4669074A (en) * 1982-05-19 1987-05-26 Burroughs Corporation Focusing control circuitry for an optical memory system
EP0095852A1 (en) * 1982-05-19 1983-12-07 BURROUGHS CORPORATION (a Michigan corporation) Focusing control circuitry for an optical memory system
JPS5919247A (ja) * 1982-07-23 1984-01-31 Sanyo Electric Co Ltd 光ピツクアツプの焦点制御装置
JPS5978995A (ja) * 1982-10-26 1984-05-08 日本油脂株式会社 油中水型エマルシヨン爆薬組成物
JPS59116942A (ja) * 1982-12-23 1984-07-06 Olympus Optical Co Ltd オ−トフォ−カス装置
JPS6012823U (ja) * 1983-07-05 1985-01-28 株式会社ケンウッド フオ−カスサ−ボ装置
JPS6089840A (ja) * 1983-10-22 1985-05-20 Olympus Optical Co Ltd 自動焦点引込み装置
US4652737A (en) * 1984-05-29 1987-03-24 Xerox Corporation Sampled optical focus error detecting system for rotating optical media
US4801794A (en) * 1984-05-29 1989-01-31 Xerox Corporation Data detection and optical focus error detection system for rotating optical media
JPS60261035A (ja) * 1984-06-06 1985-12-24 Matsushita Electric Ind Co Ltd 光学式情報記録再生装置
JPS6134734A (ja) * 1984-07-25 1986-02-19 Sony Corp 光学式デイスクプレ−ヤ
JPH0762913B2 (ja) * 1984-08-17 1995-07-05 株式会社日立製作所 自動焦点制御方法
JPS61122934A (ja) * 1984-11-16 1986-06-10 Matsushita Electric Ind Co Ltd 焦点位置制御装置
US4899327A (en) * 1985-02-04 1990-02-06 International Business Machines Corporation Focus servo loop correction
US4823330A (en) * 1985-02-04 1989-04-18 International Business Machines Corporation Focus servo loop off-set compensation
JPS61177646A (ja) * 1985-02-04 1986-08-09 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション 光学デイスク装置
US4609813A (en) * 1985-03-18 1986-09-02 International Business Machines Corporation Optical systems employing ovate light beams
US4778984A (en) * 1985-10-16 1988-10-18 Canon Denshi Kabushiki Kaisha Apparatus for detecting focus from astigmatism
JPS62273630A (ja) * 1986-05-22 1987-11-27 Canon Inc 光学的情報記録再生装置
JPH064413Y2 (ja) * 1986-11-20 1994-02-02 株式会社ケンウッド 光学式デイスクプレ−ヤのフオ−カス装置
JPS63152028A (ja) * 1986-12-16 1988-06-24 Canon Inc 光学的情報記録再生装置
JPS63213126A (ja) * 1987-02-27 1988-09-06 Nec Corp 光デイスク装置
US4998233A (en) * 1988-02-12 1991-03-05 International Business Machines Corporation Acquiring focus in optical systems using a focus error signal and a laser drive signal
JPH03194673A (ja) * 1989-12-22 1991-08-26 Sumitomo Electric Ind Ltd 記号読取装置
US5233585A (en) * 1991-09-11 1993-08-03 International Business Machines Corporation Acquiring focus in an optical disk system using a time and shape modified focus error signal
JP2565167B2 (ja) * 1991-12-24 1996-12-18 ソニー株式会社 光情報処理装置
DE69418761T2 (de) * 1993-04-02 1999-10-21 Sony Corp., Tokio/Tokyo Servosystem zum Fokussieren und Verfahren zum Ermöglichen der Erfassung eines Fokussierungsservosystems
KR100189899B1 (ko) * 1996-02-14 1999-06-01 윤종용 두께가 다른 광 디스크의 판별 방법 및 이를 적용한 광학장치
US20060256688A1 (en) * 2005-05-11 2006-11-16 Van Brocklin Andrew L Methods and apparatus for shaping mark recorded on media with electromagnetic radiation beam

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2251876B1 (en, 2012) * 1973-11-16 1977-09-23 Thomson Brandt
FR2271590B1 (en, 2012) * 1974-01-15 1978-12-01 Thomson Brandt
US3932700A (en) * 1974-02-04 1976-01-13 Zenith Radio Corporation Focus tracking registration for optical reproducing systems
FR2330062A1 (fr) * 1975-10-31 1977-05-27 Thomson Brandt Dispositif de recherche de focalisation et lecteur optique comportant un tel dispositif
JPS5922290B2 (ja) * 1975-12-26 1984-05-25 松下電器産業株式会社 コウガクシキジヨウホウキロクサイセイソウチ
JPS5827888B2 (ja) * 1976-06-29 1983-06-13 日本ビクター株式会社 光ビ−ムのフオ−カスサ−ボ方式
NL7803069A (nl) * 1978-03-22 1979-09-25 Philips Nv Meerlaags informatieschijf.
JPS5538639A (en) * 1978-09-07 1980-03-18 Pioneer Video Corp Servo drawing-in unit for focus lens of optical information reader

Also Published As

Publication number Publication date
DE3048708C2 (de) 1985-04-11
JPS5694528A (en) 1981-07-31
DE3048708A1 (de) 1981-10-15
US4368526A (en) 1983-01-11

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