JPS6414735A - Optical head device for plural beams - Google Patents
Optical head device for plural beamsInfo
- Publication number
- JPS6414735A JPS6414735A JP17152487A JP17152487A JPS6414735A JP S6414735 A JPS6414735 A JP S6414735A JP 17152487 A JP17152487 A JP 17152487A JP 17152487 A JP17152487 A JP 17152487A JP S6414735 A JPS6414735 A JP S6414735A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- optical head
- track
- spots
- follow
- 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 attain stable recording/reproducing operation by detecting a track position error on a recording medium between at least two spots out of plural ones, rotating an optical system in a face approximately parallel with the recording medium and allowing the spots to follow tracks. CONSTITUTION:Plural reflected light beams 20d-20f from the recording medium 27 are condensed by a lens 28 and spatially separated by a light separating element 13 arranged on the condensed point. Reflected beam 20d, 20f for a servo or a servo/pit signal detection are made incident upon detecting systems 15, 16. A track error signal obtained from the detecting system 15 drives an actuator 25 and a beam spot 30a of the radiated light 20a is allowed to follow the track 30 of the recording medium 27. An optical head driving part 101 rotates an optical head 10 within a face parallel with the surface of the recording medium 27 so that the offset value of a track error signal to to zero as sure as possible. Consequently, all the beam spots 30a-30c can be allowed to accurately follow the tracks.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17152487A JPS6414735A (en) | 1987-07-08 | 1987-07-08 | Optical head device for plural beams |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17152487A JPS6414735A (en) | 1987-07-08 | 1987-07-08 | Optical head device for plural beams |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6414735A true JPS6414735A (en) | 1989-01-18 |
Family
ID=15924714
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17152487A Pending JPS6414735A (en) | 1987-07-08 | 1987-07-08 | Optical head device for plural beams |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6414735A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5854780A (en) * | 1990-02-06 | 1998-12-29 | U.S. Philips Corporation | Optical scanning device using a plurality of scanning spots |
-
1987
- 1987-07-08 JP JP17152487A patent/JPS6414735A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5854780A (en) * | 1990-02-06 | 1998-12-29 | U.S. Philips Corporation | Optical scanning device using a plurality of scanning spots |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
SE8105989L (en) | DEVICE FOR READING AND / OR RECORDING AN OPTICALLY READABLE INFORMATION STRUCTURE | |
JPS57181436A (en) | Optical disc device | |
KR880002145A (en) | Disc recorder | |
GB2101307A (en) | Error detecting system of video/audio disc player | |
EP0379363A3 (en) | Optical head device for use in optical disk system | |
EP0422227A4 (en) | Optical disc recording/reproducing apparatus | |
MY105216A (en) | Tracking control apparatus for a recording/reproducing apparatus on or from an optical disk | |
DE3850718T2 (en) | Optical disk drive. | |
EP0370655A3 (en) | Optical pick-up devices | |
CA2013836C (en) | Optical recording and reproducing apparatus | |
EP0392775A3 (en) | A detrack detecting system in an optical recording/reproducing apparatus | |
CA2005341A1 (en) | Recording and/or reproduction apparatus of an optical disc | |
EP0372953A3 (en) | Method of, and apparatus for detecting access speed for a disc player | |
JPS6414735A (en) | Optical head device for plural beams | |
JPS55113139A (en) | Optical information reading pickup unit | |
HK1000334A1 (en) | A tracking system in an optical recording/reproducing device | |
EP0329431A3 (en) | Optical information processing apparatus | |
EP0367465A3 (en) | Optical pickup devices | |
JPS5764336A (en) | Track signal recording system of optical disk device | |
JPS57150145A (en) | Optical disc device with floating head | |
JPS6113289B2 (en) | ||
JPS6236760A (en) | Recording and reproducing system | |
EP0404449A3 (en) | Data-track search apparatus | |
JPS6479940A (en) | Draw type optical disk recording and reproducing device | |
JPS6427026A (en) | Optical card inclination detector |