JPS5593541A - Polarization mirror driving unit in optical information reader - Google Patents

Polarization mirror driving unit in optical information reader

Info

Publication number
JPS5593541A
JPS5593541A JP206779A JP206779A JPS5593541A JP S5593541 A JPS5593541 A JP S5593541A JP 206779 A JP206779 A JP 206779A JP 206779 A JP206779 A JP 206779A JP S5593541 A JPS5593541 A JP S5593541A
Authority
JP
Japan
Prior art keywords
signal
superposed
mirror
elements
control signal
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
JP206779A
Other languages
Japanese (ja)
Other versions
JPS6143770B2 (en
Inventor
Katsuharu Sato
Takashi Okano
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.)
Pioneer Video Corp
Universal Pioneer Corp
Original Assignee
Pioneer Video Corp
Universal Pioneer 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 Pioneer Video Corp, Universal Pioneer Corp filed Critical Pioneer Video Corp
Priority to JP206779A priority Critical patent/JPS5593541A/en
Publication of JPS5593541A publication Critical patent/JPS5593541A/en
Publication of JPS6143770B2 publication Critical patent/JPS6143770B2/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

Landscapes

  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To correct always the optical axis of a spot light correctly by rotating and controlling a rotatable polarization mirror, which polarizes an irradiation light flux and irradiates it to an information recording face, by a servo signal generation means and by tracing accurately the track of the information recording face by the irradiation light flux. CONSTITUTION:Photoelectric conversion element 9 consists of elements 9a-9d divided into four to obtain a RF reproducing signal and control signal Ve for focus servo, and outputs of elements 9a and 9b are subjected to subtraction in 50 to obtain signal Va-Vb, and this signal is superposed to control signal Vg, and the superposed signal is inputted to amplifier 52 to drive driving coil 53 of tracking mirror 6. Then, outputs of elements 9c and 9d are subjected to subtraction in 54 to obtain signal Vc-Vd, and this signal is superposed to control signal Vf, and the superposed signal is inputted to driving amplifier 56 to drive driving coil 57 of tangential mirror 5. When the neutral point position, etc., of the polarization mirror are changed, center 31 of the spot light on light receiving element 9 is shifted from center 30 of the face, however, the spot light is analyzed into y components corresponding to output Va-Vb and x components corresponding to output Vc-Vd, and the neutral point position is corrected on a basis of these values.
JP206779A 1979-01-10 1979-01-10 Polarization mirror driving unit in optical information reader Granted JPS5593541A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP206779A JPS5593541A (en) 1979-01-10 1979-01-10 Polarization mirror driving unit in optical information reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP206779A JPS5593541A (en) 1979-01-10 1979-01-10 Polarization mirror driving unit in optical information reader

Publications (2)

Publication Number Publication Date
JPS5593541A true JPS5593541A (en) 1980-07-16
JPS6143770B2 JPS6143770B2 (en) 1986-09-30

Family

ID=11518991

Family Applications (1)

Application Number Title Priority Date Filing Date
JP206779A Granted JPS5593541A (en) 1979-01-10 1979-01-10 Polarization mirror driving unit in optical information reader

Country Status (1)

Country Link
JP (1) JPS5593541A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57179954A (en) * 1981-04-27 1982-11-05 Sony Corp Optical type disc player
JPS58100238A (en) * 1981-12-10 1983-06-14 Foster Denki Kk Optical information reader
JPS5990236A (en) * 1982-11-15 1984-05-24 Matsushita Electric Ind Co Ltd Optical information reader
EP0116467A2 (en) * 1983-02-10 1984-08-22 Sony Corporation Optical disc players
JPS62139143A (en) * 1985-12-12 1987-06-22 Ricoh Co Ltd Actuator for optical pickup
JPS62501998A (en) * 1985-03-09 1987-08-06 ドイチエ　トムソン−ブラント　ゲゼルシヤフト　ミツト　ベシユレンクテル　ハフツング Method and circuit arrangement for focusing a beam onto an optical record carrier
JPH01173442A (en) * 1987-12-28 1989-07-10 Ricoh Co Ltd Tracking method for multi-beam optical pickup
JPH0337835A (en) * 1989-07-05 1991-02-19 Mitsubishi Electric Corp Optical recording and reproducing device
JPH04219634A (en) * 1991-04-12 1992-08-10 Hitachi Ltd Optical track tracking device
CN104613956A (en) * 2015-01-28 2015-05-13 南昌大学 Atmospheric polarization neutral point-based navigation orientation method

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57179954A (en) * 1981-04-27 1982-11-05 Sony Corp Optical type disc player
JPH0219538B2 (en) * 1981-04-27 1990-05-02 Sony Corp
JPS58100238A (en) * 1981-12-10 1983-06-14 Foster Denki Kk Optical information reader
JPS5990236A (en) * 1982-11-15 1984-05-24 Matsushita Electric Ind Co Ltd Optical information reader
EP0116467A2 (en) * 1983-02-10 1984-08-22 Sony Corporation Optical disc players
JPH0576100B2 (en) * 1985-03-09 1993-10-21 Thomson Brandt Gmbh
JPS62501998A (en) * 1985-03-09 1987-08-06 ドイチエ　トムソン−ブラント　ゲゼルシヤフト　ミツト　ベシユレンクテル　ハフツング Method and circuit arrangement for focusing a beam onto an optical record carrier
JPS62139143A (en) * 1985-12-12 1987-06-22 Ricoh Co Ltd Actuator for optical pickup
JP2573175B2 (en) * 1985-12-12 1997-01-22 株式会社リコー Actuator for optical pickup
JPH01173442A (en) * 1987-12-28 1989-07-10 Ricoh Co Ltd Tracking method for multi-beam optical pickup
JP2642111B2 (en) * 1987-12-28 1997-08-20 株式会社リコー Tracking method in multi-beam optical pickup
JPH0337835A (en) * 1989-07-05 1991-02-19 Mitsubishi Electric Corp Optical recording and reproducing device
JPH04219634A (en) * 1991-04-12 1992-08-10 Hitachi Ltd Optical track tracking device
JP2591344B2 (en) * 1991-04-12 1997-03-19 株式会社日立製作所 Optical track tracker
CN104613956A (en) * 2015-01-28 2015-05-13 南昌大学 Atmospheric polarization neutral point-based navigation orientation method

Also Published As

Publication number Publication date
JPS6143770B2 (en) 1986-09-30

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