JPS648518A - Actuator for optical head - Google Patents
Actuator for optical headInfo
- Publication number
- JPS648518A JPS648518A JP16416287A JP16416287A JPS648518A JP S648518 A JPS648518 A JP S648518A JP 16416287 A JP16416287 A JP 16416287A JP 16416287 A JP16416287 A JP 16416287A JP S648518 A JPS648518 A JP S648518A
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- cylinder
- coil
- face
- high speed
- 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.)
- Pending
Links
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE:To improve the high speed response by making a guide cylinder light so as to reduce the weight of the moving part thereby increasing number of effective turns of a coil. CONSTITUTION:A guide cylinder 9 is provided with a magnet, so-called a radial anisotropic magnet 6 with a magnetization vector in a direction perpendicularly to the face of cylinder. Then yokes 7, 8 are formed to clip the cylinder face from the inner and outer sides of the cylinder and a tracking servo coil 4 and a focusing servo coil 5 are mounted to the face of the outer yoke 8 opposed to the magnet 6. Moreover, a thin extruded magnet is used for the radial anisotropic magnet 6. The weight of the moving part is reduced to decrease the inductance of the coil in this way thereby applying high speed response.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16416287A JPS648518A (en) | 1987-07-01 | 1987-07-01 | Actuator for optical head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16416287A JPS648518A (en) | 1987-07-01 | 1987-07-01 | Actuator for optical head |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS648518A true JPS648518A (en) | 1989-01-12 |
Family
ID=15787906
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16416287A Pending JPS648518A (en) | 1987-07-01 | 1987-07-01 | Actuator for optical head |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS648518A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01158629A (en) * | 1987-07-27 | 1989-06-21 | Seiko Epson Corp | Actuator |
JPH01294234A (en) * | 1987-08-27 | 1989-11-28 | Seiko Epson Corp | Actuator |
US5442490A (en) * | 1992-01-27 | 1995-08-15 | Sharp Kabushiki Kaisha | Objective lens driving apparatus |
-
1987
- 1987-07-01 JP JP16416287A patent/JPS648518A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01158629A (en) * | 1987-07-27 | 1989-06-21 | Seiko Epson Corp | Actuator |
JPH01294234A (en) * | 1987-08-27 | 1989-11-28 | Seiko Epson Corp | Actuator |
US5442490A (en) * | 1992-01-27 | 1995-08-15 | Sharp Kabushiki Kaisha | Objective lens driving apparatus |
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