JPS57100633A - Controller for light focusing position - Google Patents
Controller for light focusing positionInfo
- Publication number
- JPS57100633A JPS57100633A JP17608180A JP17608180A JPS57100633A JP S57100633 A JPS57100633 A JP S57100633A JP 17608180 A JP17608180 A JP 17608180A JP 17608180 A JP17608180 A JP 17608180A JP S57100633 A JPS57100633 A JP S57100633A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- focusing
- tracking
- barrel
- lens barrel
- 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
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
Landscapes
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE:To improve focusing and tracking characteristics by coupling a lens barrel which contains an objective lens and a lens-barrel holder which has a focus driving part through a bearing, and by supporting the rotary shaft of the lens barrel with elastic rubber. CONSTITUTION:When a current is flowed through a movable coil 27 for focusing, a lens-barrel holder 24 is guided in a sliding bearing 23 by the magnetic force of a magnetic circuit 28 for focusing to slide in an optical-axis direction. Since a lens barrel 22 and the lens-barrel holder 24 are coupled together through a bearing 25, they move in one body in the optical-axis direction to perform focusing. When a current is flowed through a movable coil 35 for tracking, force operates in a direction B-B' by the magnetic force of a magnetic circuit 36 for tracking. The lens barrel 22 is supported on the rotary shaft 23 and held at an optical-axis position with elastic rubber 26 fitted to the rotary shaft 23, so the lens barrel 22 oscillates in the direction B-B' to perform tracking. Consequently, the focusing and tracking are performed excellently.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17608180A JPS57100633A (en) | 1980-12-12 | 1980-12-12 | Controller for light focusing position |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17608180A JPS57100633A (en) | 1980-12-12 | 1980-12-12 | Controller for light focusing position |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57100633A true JPS57100633A (en) | 1982-06-22 |
Family
ID=16007380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17608180A Pending JPS57100633A (en) | 1980-12-12 | 1980-12-12 | Controller for light focusing position |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57100633A (en) |
-
1980
- 1980-12-12 JP JP17608180A patent/JPS57100633A/en active Pending
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