JPS56117340A - Optical data reading and writing device - Google Patents
Optical data reading and writing deviceInfo
- Publication number
- JPS56117340A JPS56117340A JP1881780A JP1881780A JPS56117340A JP S56117340 A JPS56117340 A JP S56117340A JP 1881780 A JP1881780 A JP 1881780A JP 1881780 A JP1881780 A JP 1881780A JP S56117340 A JPS56117340 A JP S56117340A
- Authority
- JP
- Japan
- Prior art keywords
- head
- photoelectric converter
- light source
- luminous flux
- incident
- 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
Landscapes
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE:To adjust the relative position of a head on a disk surface to a normal position under self-control by the simple constitution that the reflected luminous flux of laser beam incident to the disk recording surface at constant incident angle (theta) is led to a photoelectric converter divided into four sections via a different optical path from the incident luminous flux. CONSTITUTION:Container 11 constituting optical data reading and writing device HD (head) has an opening tip; light source holding base 4 holding spot light source 5 and photodetection parts holding base 6 holding photoelectric converter 7 in the interior are incorporated on optical axes Z1 and Z3, respectively, and lenses L1, L3 and L2 are placed on optical axes Z1 and Z3, and optical axis Z2 of head HD. Photoelectric converter 7 is electrically divided into four parts (alpha), (beta), (gamma), and (delta) by split planes 9 and 10; a luminous flux from spot light source 5 is made incident to the disk recording surface and its reflected light is photodetected by photoelectric converter 7, which leads four output signals out of the head to arithmetic circuit SC, thereby outputtting three kind of arithmetic outputs.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55018817A JPS6048810B2 (en) | 1980-02-18 | 1980-02-18 | Optical data reading/writing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55018817A JPS6048810B2 (en) | 1980-02-18 | 1980-02-18 | Optical data reading/writing device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56117340A true JPS56117340A (en) | 1981-09-14 |
JPS6048810B2 JPS6048810B2 (en) | 1985-10-29 |
Family
ID=11982119
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55018817A Expired JPS6048810B2 (en) | 1980-02-18 | 1980-02-18 | Optical data reading/writing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6048810B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58153238A (en) * | 1982-03-05 | 1983-09-12 | Ricoh Co Ltd | Tracking method |
JPS59101038A (en) * | 1982-11-30 | 1984-06-11 | Akai Electric Co Ltd | Optical pickup |
JPS61150391A (en) * | 1984-12-20 | 1986-07-09 | ドレクスラ−・テクノロジイ・コ−ポレ−シヨン | Laser recorder |
-
1980
- 1980-02-18 JP JP55018817A patent/JPS6048810B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58153238A (en) * | 1982-03-05 | 1983-09-12 | Ricoh Co Ltd | Tracking method |
JPS59101038A (en) * | 1982-11-30 | 1984-06-11 | Akai Electric Co Ltd | Optical pickup |
JPS61150391A (en) * | 1984-12-20 | 1986-07-09 | ドレクスラ−・テクノロジイ・コ−ポレ−シヨン | Laser recorder |
Also Published As
Publication number | Publication date |
---|---|
JPS6048810B2 (en) | 1985-10-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3684734D1 (en) | OPTICAL READING HEAD DEVICES. | |
JPS5753832A (en) | Method and device for recording of optical information | |
FR2360150A1 (en) | AUTOMATIC FOCUSING DEVICE | |
EP0326354A3 (en) | Apparatus for reading information out of an optical recording medium | |
EP0379363A3 (en) | Optical head device for use in optical disk system | |
JPS5558832A (en) | Signal recording and reproducing unit of optical type | |
JPS54128303A (en) | Optical reproducing device of information recording medium disc | |
JPS57179954A (en) | Optical type disc player | |
JPS56117340A (en) | Optical data reading and writing device | |
JPS55125417A (en) | Photodetector | |
JPS56156937A (en) | Optical pickup device | |
JPS6482348A (en) | Overwritable magneto-optical disk device | |
JPS57189348A (en) | Auto-focus system of optical disk | |
JPS5640A (en) | Optical information reproducing unit | |
JPS5661046A (en) | Optical disc device | |
JPS6452240A (en) | Magneto-optical recording and reproducing device | |
JPS6413246A (en) | Optical head for magneto-optical storage | |
JPS5470004A (en) | Optical information reader | |
JPS6440912A (en) | Lens for optical recording and reproducing device | |
JPS5570942A (en) | Tracking error detector | |
FR2393362A1 (en) | Focussing control for optical recording system - uses outputs of two photodetectors receiving respective partially-reflected beams from semi-reflective mirror | |
JPS573234A (en) | Optical recorder and reproducer | |
JPS5470003A (en) | Optical information reader | |
JPS6410433A (en) | Optical information reader | |
JPS5778644A (en) | Optical noncontact reproducer |