DE2711921C2 - Abstandsregelgerät - Google Patents

Abstandsregelgerät

Info

Publication number
DE2711921C2
DE2711921C2 DE2711921A DE2711921A DE2711921C2 DE 2711921 C2 DE2711921 C2 DE 2711921C2 DE 2711921 A DE2711921 A DE 2711921A DE 2711921 A DE2711921 A DE 2711921A DE 2711921 C2 DE2711921 C2 DE 2711921C2
Authority
DE
Germany
Prior art keywords
frequency
plate
filter
distance
lens
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
DE2711921A
Other languages
German (de)
English (en)
Other versions
DE2711921A1 (de
Inventor
William Eldo Levittown Pa. Barnette
Edward Coley Cranbury N.J. Fox
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.)
RCA Corp
Original Assignee
RCA Corp
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 RCA Corp filed Critical RCA Corp
Publication of DE2711921A1 publication Critical patent/DE2711921A1/de
Application granted granted Critical
Publication of DE2711921C2 publication Critical patent/DE2711921C2/de
Expired 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
    • G11B7/09—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
    • G11B7/0914—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 non-optical methods, e.g. capacitive

Landscapes

  • Optical Recording Or Reproduction (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Automatic Focus Adjustment (AREA)
  • Control Of Position Or Direction (AREA)
DE2711921A 1976-03-19 1977-03-18 Abstandsregelgerät Expired DE2711921C2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB11117/76A GB1577132A (en) 1976-03-19 1976-03-19 Compensation apparatus for a servo system with periodic command signals

Publications (2)

Publication Number Publication Date
DE2711921A1 DE2711921A1 (de) 1977-09-22
DE2711921C2 true DE2711921C2 (de) 1983-11-03

Family

ID=9980355

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2711921A Expired DE2711921C2 (de) 1976-03-19 1977-03-18 Abstandsregelgerät

Country Status (7)

Country Link
US (1) US4300226A (enExample)
JP (1) JPS52117103A (enExample)
AU (1) AU510745B2 (enExample)
DE (1) DE2711921C2 (enExample)
FR (1) FR2344917A1 (enExample)
GB (1) GB1577132A (enExample)
NL (1) NL7702990A (enExample)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52120805A (en) * 1976-04-02 1977-10-11 Sony Corp Servo apparatus
DE2902376C2 (de) * 1978-01-24 1985-10-03 Vladimir Viktorovič Ljuberzy Moskovskaja oblast' Chmelev Einrichtung zur Dämpfung mechanischer Schwingungen
NL7901721A (nl) * 1979-03-05 1980-09-09 Philips Nv Regelsysteem.
DE3002670C2 (de) * 1980-01-25 1984-08-16 Polygram Gmbh, 2000 Hamburg Anordnung zur Messung der horizontalen Verformung von Informationsträgern
DE3029743C2 (de) * 1980-08-06 1986-02-27 Messer Griesheim Gmbh, 6000 Frankfurt Vorrichtung zur Konstanthaltung des Abstandes eines Werkzeuges von einem zu bearbeitenden Werkstück
JPS5766573A (en) * 1980-10-13 1982-04-22 Victor Co Of Japan Ltd Detecting circuit for reference signal for tracking control
JPS59168835U (ja) * 1983-04-27 1984-11-12 パイオニア株式会社 光学式記録情報読取装置
JPS60155017U (ja) * 1984-03-24 1985-10-16 パイオニア株式会社 光学情報読取装置
EP0191000B1 (de) * 1985-02-08 1989-07-12 GET Gesellschaft für Elektronik-Technologie mbH Messanordnung mit einer kapazitiven Messelektrode und Bearbeitungs-Werkzeug mit integrierter Elektrode
DE3508423A1 (de) * 1985-03-09 1986-09-11 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen System zur ermittlung der abtastgeschwindigkeit von audioplatten mit beruehrungsloser abtastung
US4849916A (en) * 1985-04-30 1989-07-18 Ade Corporation Improved spatial resolution measurement system and method
US4804894A (en) * 1986-06-10 1989-02-14 Sony Corporation Motor rotation servo control apparatus
US4818948A (en) * 1986-08-05 1989-04-04 Pratt & Whitney Canada Inc. Capacitive bridge-type probe for measuring blade tip clearance
US4879672A (en) * 1987-08-21 1989-11-07 Control Data Corporation Method and apparatus for testing runout velocity and acceleration on a surface
US4931887A (en) * 1988-02-01 1990-06-05 International Business Machines Corporation Capacitive measurement and control of the fly height of a recording slider
JPH0820905B2 (ja) * 1988-03-10 1996-03-04 富士通株式会社 サーボ位置決め装置
US4980880A (en) * 1989-11-06 1990-12-25 Laser Magnetic Storage International Company Method and apparatus for simultaneously reading both sides of an optical storage disk
JP2504307B2 (ja) * 1990-08-01 1996-06-05 三菱電機株式会社 電動機の速度制御装置
US5446716A (en) * 1994-01-10 1995-08-29 Eastman Kodak Company Laser power control in an optical recording system to compensate for multiple system degradations
US5768228A (en) * 1996-09-09 1998-06-16 International Business Machines Corporation Method and sytem for cancelling optical servo crosstalk in optical disk drives
US6107767A (en) * 1998-03-20 2000-08-22 Trw Inc. Electric assist steering system having an improved motor current controller with notch filter
US7522480B2 (en) 2001-01-25 2009-04-21 Dphi Acquisitions, Inc. Digital tracking servo system with multi-track seek with an acceleration clamp
US20030133220A1 (en) * 2002-01-10 2003-07-17 Yi-Ping Hsin Written-in repeatable run-out compensation in embedded servo disc drives
DE10215252B4 (de) * 2002-04-06 2005-06-30 Minebea Co., Ltd. Verfahren zur Messung des wiederholbaren und des nicht wiederholbaren Schlages eines rotierenden Bauteils, insbesondere des Rotors eines Spindelmotors, und Vorrichtung zur Durchführung des Verfahrens
US7145304B1 (en) * 2005-08-29 2006-12-05 Zoran Corporation Rotating storage media control loops having adaptive feed forward insertion of signals including harmonics
US8179753B2 (en) * 2006-05-17 2012-05-15 Nec Corporation Positioning control unit and optical disk drive
US10366718B1 (en) * 2018-03-23 2019-07-30 Seagate Technology Llc Hard disk servo control adaptive notch filter using a recursive least squares processor

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3187256A (en) * 1960-09-09 1965-06-01 Raydata Corp System for monitoring and indicating the eccentricity of circular objects in both a static and dynamic condition
US3379972A (en) * 1963-12-26 1968-04-23 Reliance Electric & Eng Co Non-contacting displacement gauge having a feedback means for controlling the vibration amplitude of the probe
US3808486A (en) * 1972-08-25 1974-04-30 Information Storage Systems Selective frequency compensation for a servo system
NL7211998A (enExample) * 1972-09-02 1974-03-05
US4005260A (en) * 1972-11-11 1977-01-25 U.S. Philips Corporation Device for reading a disk-shaped record carrier with time base correction
NL7215306A (enExample) * 1972-11-11 1974-05-14
US3825323A (en) * 1973-05-17 1974-07-23 Teletype Corp Rotary disc recording and readout system having capacitance controlled lens positioning means
US3946166A (en) * 1974-04-01 1976-03-23 Zenith Radio Corporation Tracking arrangement
US3934262A (en) * 1974-07-02 1976-01-20 Zenith Radio Corporation Video disc and method of playback

Also Published As

Publication number Publication date
NL7702990A (nl) 1977-09-21
GB1577132A (en) 1980-10-22
AU2339177A (en) 1978-09-21
JPS5626895B2 (enExample) 1981-06-22
FR2344917B1 (enExample) 1982-02-26
JPS52117103A (en) 1977-10-01
AU510745B2 (en) 1980-07-10
DE2711921A1 (de) 1977-09-22
FR2344917A1 (fr) 1977-10-14
US4300226A (en) 1981-11-10

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Legal Events

Date Code Title Description
8126 Change of the secondary classification

Ipc: ENTFAELLT

D2 Grant after examination
8364 No opposition during term of opposition