JPS5548872A - Write-in unit for servo signal - Google Patents
Write-in unit for servo signalInfo
- 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
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
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)
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)
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 |
-
1978
- 1978-10-02 JP JP12040378A patent/JPS5938668B2/en not_active Expired
Cited By (12)
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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