JPS56159844A - Focus control device - Google Patents

Focus control device

Info

Publication number
JPS56159844A
JPS56159844A JP6246880A JP6246880A JPS56159844A JP S56159844 A JPS56159844 A JP S56159844A JP 6246880 A JP6246880 A JP 6246880A JP 6246880 A JP6246880 A JP 6246880A JP S56159844 A JPS56159844 A JP S56159844A
Authority
JP
Japan
Prior art keywords
range
focus control
pulselike
spacing
disc
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.)
Granted
Application number
JP6246880A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6126138B2 (enrdf_load_stackoverflow
Inventor
Kazuo Hirasawa
Mitsushige Kondo
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP6246880A priority Critical patent/JPS56159844A/ja
Publication of JPS56159844A publication Critical patent/JPS56159844A/ja
Publication of JPS6126138B2 publication Critical patent/JPS6126138B2/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
    • G11B7/09—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
    • G11B7/0945—Methods for initialising servos, start-up sequences

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
JP6246880A 1980-05-09 1980-05-09 Focus control device Granted JPS56159844A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6246880A JPS56159844A (en) 1980-05-09 1980-05-09 Focus control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6246880A JPS56159844A (en) 1980-05-09 1980-05-09 Focus control device

Publications (2)

Publication Number Publication Date
JPS56159844A true JPS56159844A (en) 1981-12-09
JPS6126138B2 JPS6126138B2 (enrdf_load_stackoverflow) 1986-06-19

Family

ID=13201057

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6246880A Granted JPS56159844A (en) 1980-05-09 1980-05-09 Focus control device

Country Status (1)

Country Link
JP (1) JPS56159844A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS595440A (ja) * 1982-06-30 1984-01-12 Nec Home Electronics Ltd 光学ピツクアツプのフオ−カスサ−ボ回路
WO1986005306A1 (en) * 1985-03-09 1986-09-12 Deutsche Thomson-Brandt Gmbh Process and circuit arrangement for focussing a light beam onto an optical recording medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS595440A (ja) * 1982-06-30 1984-01-12 Nec Home Electronics Ltd 光学ピツクアツプのフオ−カスサ−ボ回路
WO1986005306A1 (en) * 1985-03-09 1986-09-12 Deutsche Thomson-Brandt Gmbh Process and circuit arrangement for focussing a light beam onto an optical recording medium

Also Published As

Publication number Publication date
JPS6126138B2 (enrdf_load_stackoverflow) 1986-06-19

Similar Documents

Publication Publication Date Title
ES497107A0 (es) Un metodo de controlar la potencia de salida de corriente continua derivada de un panel solar fotovoltaico y aparato correspondiente.
AU5904280A (en) Solar energy system with concentrating lens
AU6053180A (en) Plant for the automatic control of the incident solar flux
ATE9382T1 (de) Vorrichtung zur erzeugung von elektrischer energie durch ausnutzung und steuerung der windenergie.
JPS5393021A (en) Aperture control device in variable power lens
JPS56159844A (en) Focus control device
IL63932A0 (en) System for the generation of electrical energy by utilizing and controlling the potential energy of seawater
FR2441314A1 (fr) Installation de cloture electrique
JPS56148747A (en) Focus controller
JPS5722265A (en) Exposure control device for copying machine
ES288780Y (es) Dispositivo de control de la energia solar.
JPS5211972A (en) Light controlling method in the light receiving unit
JPS56148746A (en) Focus controller
JPS52123249A (en) Automatic focus adjusting device for microscope
JPS5347803A (en) Automatic focus controller
JPS5376058A (en) Direction controller
JPS5436932A (en) Camera with lens shutter
JPS53110838A (en) Variable power device of copiers
JPS5240716A (en) Motor controlling device
JPS52129535A (en) Optical microscope
JPS51124426A (en) Automatic exposure control device provided with the strobo lightemissi on control device
JPS57130239A (en) Focus servocontrol system
JPS51135666A (en) Device for regulating focus
JPS5315801A (en) Optical point controller for light flux
JPS53123789A (en) Receiving system for remote control