JPS6414733A - Optical head - Google Patents
Optical headInfo
- Publication number
- JPS6414733A JPS6414733A JP17194387A JP17194387A JPS6414733A JP S6414733 A JPS6414733 A JP S6414733A JP 17194387 A JP17194387 A JP 17194387A JP 17194387 A JP17194387 A JP 17194387A JP S6414733 A JPS6414733 A JP S6414733A
- Authority
- JP
- Japan
- Prior art keywords
- light beam
- current
- objective lens
- access control
- mirror
- 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
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE:To make an access control highly accurate by dividing a light beam into a controlling light beam and position detecting light beam by an optical path converting means and making the controlling light beam incident on a position detector. CONSTITUTION:The light beam 101 emitted from an optical system 100 is reflected at about right angles upwards as a controlling light beam 101a by one part of the reflection face 403a of a mirror 403 and reflected as well as about right angles downwards as the light beam 101b for position detection by the reflection face 403b of the other part. This position detecting light beam 101b arrives at a position detector 6 by passing the hole 401a of a supporting base 401 and the current position of an objective lens 406 is detected by a position detection circuit. In the access control, a current is passed to the coils 501a, 501b for tracking by a control circuit based on the difference in a designated objective lens position and a detected current position, an electromagnetic force is generated by the action of this current and the magnetic field inside magnetic gaps 203a, 203b, the objective lens 406 is moved in the radial direction of an optical disk 700 together with the mirror 403 and the access operation is executed. The access control is thus executed with high accuracy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17194387A JPS6414733A (en) | 1987-07-09 | 1987-07-09 | Optical head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17194387A JPS6414733A (en) | 1987-07-09 | 1987-07-09 | Optical head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6414733A true JPS6414733A (en) | 1989-01-18 |
Family
ID=15932682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17194387A Pending JPS6414733A (en) | 1987-07-09 | 1987-07-09 | Optical head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6414733A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0320027U (en) * | 1989-07-07 | 1991-02-27 | ||
| US5168486A (en) * | 1990-06-15 | 1992-12-01 | Pioneer Electronic Corporation | Recording device for recording a blank disk from an optical disk |
| US5410433A (en) * | 1989-06-30 | 1995-04-25 | Art Tech Gigadisc "Atg" | Access and follower control device for optical disk |
-
1987
- 1987-07-09 JP JP17194387A patent/JPS6414733A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5410433A (en) * | 1989-06-30 | 1995-04-25 | Art Tech Gigadisc "Atg" | Access and follower control device for optical disk |
| JPH0320027U (en) * | 1989-07-07 | 1991-02-27 | ||
| US5168486A (en) * | 1990-06-15 | 1992-12-01 | Pioneer Electronic Corporation | Recording device for recording a blank disk from an optical disk |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4732485A (en) | Optical surface profile measuring device | |
| GB1502292A (en) | Focus detector | |
| EP0448362A2 (en) | Mirror rotation angle detection mechanism | |
| KR0147628B1 (en) | Optical pickup for multi-layer disk | |
| CN110487120A (en) | A kind of the laser system of defense and method of long distance illumination | |
| US4748322A (en) | Apparatus for determining the distance between a measuring surface and a reference surface | |
| US4900910A (en) | System for detecting the position of an objective lens | |
| JPS6414733A (en) | Optical head | |
| Heeren et al. | An optical system to measure the end effector position for on-line control purposes | |
| CA2013836A1 (en) | Optical recording and reproducing apparatus | |
| JPS6448238A (en) | Optical system driving device | |
| JPS6421728A (en) | Optical head | |
| US5218597A (en) | Optical reading and writing device | |
| JPS6365346A (en) | Optical type surface inspection device | |
| JPS56125604A (en) | Surface roughness measuring apparatus | |
| JPS56165937A (en) | Optical recorder and reproducer | |
| JPS57210308A (en) | Focus detecting device | |
| JPS54107708A (en) | Optical information recorder | |
| JPS5757004A (en) | Reflective antenna | |
| JPS647345A (en) | Optical pickup device | |
| JPS6446242A (en) | Optical pickup | |
| JPH0714189A (en) | Objective lens driving device | |
| JPS6489043A (en) | Focus controller | |
| JPS551613A (en) | Light pickup | |
| JPS5764712A (en) | Detector for focusing position |