JPS6443820A - Lens actuator - Google Patents
Lens actuatorInfo
- Publication number
- JPS6443820A JPS6443820A JP20068487A JP20068487A JPS6443820A JP S6443820 A JPS6443820 A JP S6443820A JP 20068487 A JP20068487 A JP 20068487A JP 20068487 A JP20068487 A JP 20068487A JP S6443820 A JPS6443820 A JP S6443820A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- cover
- magnetic field
- substance
- control
- 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
Abstract
PURPOSE:To form a bias magnetic field with a small quantity of the energy consumption and penetration of heat and to attain a focus control and a tracking control without receiving the bad influence of a magnetic field by providing the cover of a ferro-magnetic substance on the surface along a recording medium. CONSTITUTION:On the surface along a recording medium 2 of an lens actuator, a cover 6 of the ferromagnetic substance is arranged. For this reason, since many magnetic fluxes to generate an electromagnetic 3 use a ferromagnetic substance cover 6 as a magnetic path, the magnetic resistance of the magnetic path is largely reduced, and a magnetic flux density also rises. Consequently, a sufficient bias magnetic field necessary to recording can be generated by a small quantity of the energy consumption and generation of heat. Since a driving force generating part to control the position of a converging lens is magnetically shielded by the ferro-magnetic substance cover 6, the satisfactory focus control and tracking control can be executed without receiving the bad influence of a bias magnetic field due to the electromagnet 3.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20068487A JPS6443820A (en) | 1987-08-11 | 1987-08-11 | Lens actuator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20068487A JPS6443820A (en) | 1987-08-11 | 1987-08-11 | Lens actuator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6443820A true JPS6443820A (en) | 1989-02-16 |
Family
ID=16428528
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20068487A Pending JPS6443820A (en) | 1987-08-11 | 1987-08-11 | Lens actuator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6443820A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01118249A (en) * | 1987-10-30 | 1989-05-10 | Seiko Epson Corp | Magneto-optical recording and reproducing device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5794906A (en) * | 1980-12-05 | 1982-06-12 | Ricoh Co Ltd | Optical magnetic recorder |
JPS62119762A (en) * | 1985-11-20 | 1987-06-01 | Hitachi Ltd | Photomagnetic disk device |
JPS6356835A (en) * | 1986-08-27 | 1988-03-11 | Canon Inc | Magneto-optical information recorder |
-
1987
- 1987-08-11 JP JP20068487A patent/JPS6443820A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5794906A (en) * | 1980-12-05 | 1982-06-12 | Ricoh Co Ltd | Optical magnetic recorder |
JPS62119762A (en) * | 1985-11-20 | 1987-06-01 | Hitachi Ltd | Photomagnetic disk device |
JPS6356835A (en) * | 1986-08-27 | 1988-03-11 | Canon Inc | Magneto-optical information recorder |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01118249A (en) * | 1987-10-30 | 1989-05-10 | Seiko Epson Corp | Magneto-optical recording and reproducing device |
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