JPS5548872A - Write-in unit for servo signal - Google Patents

Write-in unit for servo signal

Info

Publication number
JPS5548872A
JPS5548872A JP12040378A JP12040378A JPS5548872A JP S5548872 A JPS5548872 A JP S5548872A JP 12040378 A JP12040378 A JP 12040378A JP 12040378 A JP12040378 A JP 12040378A JP S5548872 A JPS5548872 A JP S5548872A
Authority
JP
Japan
Prior art keywords
laser light
incident
reflected
shaking
light
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
JP12040378A
Other languages
Japanese (ja)
Other versions
JPS5938668B2 (en
Inventor
Reizo Kaneko
Tadahiko Kameyama
Makoto Mizukami
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP12040378A priority Critical patent/JPS5938668B2/en
Publication of JPS5548872A publication Critical patent/JPS5548872A/en
Publication of JPS5938668B2 publication Critical patent/JPS5938668B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices By Optical Means (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Moving Of Head For Track Selection And Changing (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)

Abstract

PURPOSE: To write in the servo signal representing the track position on the magnetic disc in high accuracy, by providing one perpendicular reflection mirror on the head arm in shaking magnetic head and reflecting the laser light on it.
CONSTITUTION: The laser light 10a emitted from the laser light source 10 is divided into two, the light 10b reflected orthogonally and the light 10c transmitting and going straight, with the beam splitter 11. The laser 10b reflected is incident to the reference orthogonal reflection mirror 12, reflected on the both reflection surfaces, and is incident to the photo detection measuring unit 13 via the beam splitter 11. On the other hand, the laser light 10c transmitted from the beam splitter 11 is incident to the shaking orthogonal reflection mirror 14, reflected on the both reflection surfaces, transmitted through splitter 11 and is incident to the photo detection measuring unit 13. Although the changed part λ of the light path of the laser light 10c is measured at the photo detection measuring unit 13, since the shaking angle θ is known from equation (1), the result can set the head arm 1 at desired shaking angle via the actuator drive control section 15.
COPYRIGHT: (C)1980,JPO&Japio
JP12040378A 1978-10-02 1978-10-02 Servo signal writing device Expired JPS5938668B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12040378A JPS5938668B2 (en) 1978-10-02 1978-10-02 Servo signal writing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12040378A JPS5938668B2 (en) 1978-10-02 1978-10-02 Servo signal writing device

Publications (2)

Publication Number Publication Date
JPS5548872A true JPS5548872A (en) 1980-04-08
JPS5938668B2 JPS5938668B2 (en) 1984-09-18

Family

ID=14785341

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12040378A Expired JPS5938668B2 (en) 1978-10-02 1978-10-02 Servo signal writing device

Country Status (1)

Country Link
JP (1) JPS5938668B2 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6070563A (en) * 1983-09-27 1985-04-22 Toshiba Corp High density spiral drawing device
JPS613564U (en) * 1984-06-06 1986-01-10 アルプス電気株式会社 disk player
JPS61153116U (en) * 1985-03-09 1986-09-22
JPS6459003A (en) * 1987-08-29 1989-03-06 Toshiba Corp Optical information storage medium inspecting device
EP0348165A2 (en) * 1988-06-21 1989-12-27 Sony Corporation Disc recording and/or reproducing apparatus
JPH08315531A (en) * 1995-05-15 1996-11-29 Hitachi Ltd Method for positioning head and writing servo information on disk-like recording medium, magnetic disc drive unit and servo information writing unit therefor, and displacement detection mirror
US5812266A (en) * 1995-12-15 1998-09-22 Hewlett-Packard Company Non-contact position sensor
US5886787A (en) * 1995-12-15 1999-03-23 Hewlett-Packard Company Displacement sensor and method for producing target feature thereof
US6459492B1 (en) 1997-03-14 2002-10-01 Agilent Technologies, Inc. Non-contact position sensor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59167379U (en) * 1983-04-23 1984-11-09 ダイキン工業株式会社 Refrigeration equipment for containers

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6070563A (en) * 1983-09-27 1985-04-22 Toshiba Corp High density spiral drawing device
JPS613564U (en) * 1984-06-06 1986-01-10 アルプス電気株式会社 disk player
JPS61153116U (en) * 1985-03-09 1986-09-22
JPH0351815Y2 (en) * 1985-03-09 1991-11-07
JPS6459003A (en) * 1987-08-29 1989-03-06 Toshiba Corp Optical information storage medium inspecting device
EP0348165A2 (en) * 1988-06-21 1989-12-27 Sony Corporation Disc recording and/or reproducing apparatus
JPH08315531A (en) * 1995-05-15 1996-11-29 Hitachi Ltd Method for positioning head and writing servo information on disk-like recording medium, magnetic disc drive unit and servo information writing unit therefor, and displacement detection mirror
US5812266A (en) * 1995-12-15 1998-09-22 Hewlett-Packard Company Non-contact position sensor
US5835224A (en) * 1995-12-15 1998-11-10 Hewlett-Packard Company Non-contact position sensor
US5886787A (en) * 1995-12-15 1999-03-23 Hewlett-Packard Company Displacement sensor and method for producing target feature thereof
US5982494A (en) * 1995-12-15 1999-11-09 Hewlett-Packard Company Non-contact position sensor
US6459492B1 (en) 1997-03-14 2002-10-01 Agilent Technologies, Inc. Non-contact position sensor

Also Published As

Publication number Publication date
JPS5938668B2 (en) 1984-09-18

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