JPS57103109A - Centering device for recording track of recording disk - Google Patents
Centering device for recording track of recording diskInfo
- Publication number
- JPS57103109A JPS57103109A JP17997480A JP17997480A JPS57103109A JP S57103109 A JPS57103109 A JP S57103109A JP 17997480 A JP17997480 A JP 17997480A JP 17997480 A JP17997480 A JP 17997480A JP S57103109 A JPS57103109 A JP S57103109A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- disk
- track
- reflected light
- accordance
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B11/27—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
- G01B11/272—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes using photoelectric detection means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing Optical Record Carriers (AREA)
Abstract
PURPOSE:To achieve positioning of a center of a recording track by irradiating points on the circumference of the innermost circumferential circle of a recording track with light, and moving a recording disk in accordance with the quantity of reflected light. CONSTITUTION:A disk mounting table 11 on which a recording disk 2 is mounted is movable as shown by arrows X and Y independently by carriage motors 3 and 4. Four points where two parallel diameter lines cross the innermost circumference in the directions X and Y are irradiated with laser beam bundles (a)-(d) from an unshown light source at right angles to the disk surface. The reflected light beams of said beam bundles (a)-(d) are made incident to photodetecting elements 6-9, which are so arranged that reflected light beams having constant reflection angles by a diffraction grating formed by recording tracks are photodetected. In accordance with a difference in the quantity of a relfected light, the carriage motor 4 is driven and when the track center point of the disk is found, a center hole is bored by a working drill.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17997480A JPS57103109A (en) | 1980-12-19 | 1980-12-19 | Centering device for recording track of recording disk |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17997480A JPS57103109A (en) | 1980-12-19 | 1980-12-19 | Centering device for recording track of recording disk |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57103109A true JPS57103109A (en) | 1982-06-26 |
JPS6349281B2 JPS6349281B2 (en) | 1988-10-04 |
Family
ID=16075230
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17997480A Granted JPS57103109A (en) | 1980-12-19 | 1980-12-19 | Centering device for recording track of recording disk |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57103109A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4761776A (en) * | 1985-12-11 | 1988-08-02 | U.S. Philips Corporation | Device for determining a centring error of an optical disc relative to the axis of rotation of a turntable supporting the disc |
JPH0416684U (en) * | 1990-03-22 | 1992-02-12 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56153506A (en) * | 1980-03-31 | 1981-11-27 | Polygram Gmbh | Centering unit for providing central hole on disk |
-
1980
- 1980-12-19 JP JP17997480A patent/JPS57103109A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56153506A (en) * | 1980-03-31 | 1981-11-27 | Polygram Gmbh | Centering unit for providing central hole on disk |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4761776A (en) * | 1985-12-11 | 1988-08-02 | U.S. Philips Corporation | Device for determining a centring error of an optical disc relative to the axis of rotation of a turntable supporting the disc |
JPH0416684U (en) * | 1990-03-22 | 1992-02-12 |
Also Published As
Publication number | Publication date |
---|---|
JPS6349281B2 (en) | 1988-10-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES8407614A1 (en) | Apparatus for recording and/or reading information by means of a radiation beam. | |
EP0096476A3 (en) | Plane linear grating for optically encoding information | |
ATE105962T1 (en) | OPTICAL RECORDING DEVICE AND OPTICAL DISK. | |
EP0370655A3 (en) | Optical pick-up devices | |
JPS57103109A (en) | Centering device for recording track of recording disk | |
GB1496565A (en) | Method of obtaining a track guidance signal and method of guiding a light beam on a signal track using such guidance signal | |
FR2349910A1 (en) | DISC FOR RECORDING VIDEO SIGNALS IN PARTICULAR AND ITS MANUFACTURING PROCESS | |
JPS57103110A (en) | Centering device for recording track of recording disk | |
KR880013126A (en) | Optical disc master plate manufacturing method and manufacturing apparatus and optical disc | |
ATE21547T1 (en) | CENTERING DEVICE FOR MAKING A CENTRAL HOLE IN PANELS. | |
JPS5622227A (en) | Information recording system of optical disk | |
JPS57103111A (en) | Centering device for recording track of recording disk | |
JPS57103134A (en) | Optical disk | |
EP0370483A3 (en) | Information reproducing apparatus | |
TW376516B (en) | Optical spot generation device for recording medium | |
JPS6113289B2 (en) | ||
US3817537A (en) | Improvements in or relating to the production of disc records | |
JPS59171119A (en) | Device for formation of laser pattern | |
JPS6449134A (en) | Optical disk recording and reproducing device | |
EP0367465A3 (en) | Optical pickup devices | |
JPS5764336A (en) | Track signal recording system of optical disk device | |
JPS55101143A (en) | Optical reproducing disc | |
JPS62209736A (en) | Optical head for optical information recording and reproducing device | |
JPS6410434A (en) | Optical information recording and reproducing device | |
JPS5750328A (en) | Optical recording and reproducing device |