JPS647386A - Retrieve device for information track - Google Patents
Retrieve device for information trackInfo
- Publication number
- JPS647386A JPS647386A JP16280187A JP16280187A JPS647386A JP S647386 A JPS647386 A JP S647386A JP 16280187 A JP16280187 A JP 16280187A JP 16280187 A JP16280187 A JP 16280187A JP S647386 A JPS647386 A JP S647386A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- light beam
- carrier
- tracking element
- 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 Head For Track Selection And Changing (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
Abstract
PURPOSE:To retrieve a desired track stably at a high speed by adopting the constitution such that a tracking element is not vibrated even when a linear motor is moved at a high speed at the coarse retrieval. CONSTITUTION:In case of giving a desired track address to an address input device 77, an information processing controller 78 uses a signal of a synthesis circuit 61 to read a track number with a light beam of a recording carrier 57 located thereupon and sends a direction signal to a signal generating circuit 75. A state observing device 73 estimates a relative position of the element 56 to a carrying base 71 by using a signal of a circuit 56 to drive the tracking element 56, a signal of a circuit 70 to drive a linear motor 69 and a signal of a counter circuit 74 representing the position of light beam on the carrier 57. The estimation signal is fed to the tracking element 56 to avoid the vibration. The circuit 74 counts number of tracks through which the light beam crosses on the carrier 57, sends a coincidence signal to the device 78 to open a switch 76 thereby stopping the motor 69.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16280187A JPS647386A (en) | 1987-06-30 | 1987-06-30 | Retrieve device for information track |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16280187A JPS647386A (en) | 1987-06-30 | 1987-06-30 | Retrieve device for information track |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS647386A true JPS647386A (en) | 1989-01-11 |
Family
ID=15761473
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16280187A Pending JPS647386A (en) | 1987-06-30 | 1987-06-30 | Retrieve device for information track |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS647386A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4986895A (en) * | 1983-08-29 | 1991-01-22 | Osaka Gas Company Limited | Process for treating coal tar or coal tar pitch |
US5063810A (en) * | 1989-06-29 | 1991-11-12 | Suzuki Jisoshi Kogyo Kabushiki Kaisha | Shift mechanism |
-
1987
- 1987-06-30 JP JP16280187A patent/JPS647386A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4986895A (en) * | 1983-08-29 | 1991-01-22 | Osaka Gas Company Limited | Process for treating coal tar or coal tar pitch |
US5063810A (en) * | 1989-06-29 | 1991-11-12 | Suzuki Jisoshi Kogyo Kabushiki Kaisha | Shift mechanism |
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