JPS6489031A - Information processor - Google Patents
Information processorInfo
- Publication number
- JPS6489031A JPS6489031A JP24609587A JP24609587A JPS6489031A JP S6489031 A JPS6489031 A JP S6489031A JP 24609587 A JP24609587 A JP 24609587A JP 24609587 A JP24609587 A JP 24609587A JP S6489031 A JPS6489031 A JP S6489031A
- Authority
- JP
- Japan
- Prior art keywords
- detected
- digital data
- converted
- subtracting
- constitution
- 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
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE:To execute a stable and correct control with an easy constitution by driving a converging means according to digital data converted by means of a converting means. CONSTITUTION:A light emitted from a light source 14 is focused on a recording medium 1 by using a converging means 10, first and second signals are detected from the light from the recording medium 1, the detected first and second detecting signals are added, and thereby, an incident light quantity is detected. The first and second detecting signals are subtracted by a subtracting means 22, the detection result of the incident light quantity is made into a referring voltage, and a subtracting signal from the subtracting means 22 is converted to the digital data by means of a converting gain corresponding to the referring voltage. Further, according to the converted digital data, the converging means 10 is driven. Thus, the converging means 10, the stable and correct control can be executed with the simple constitution.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24609587A JPS6489031A (en) | 1987-09-30 | 1987-09-30 | Information processor |
US07/249,928 US4942563A (en) | 1987-09-30 | 1988-09-27 | Signal processing apparatus and method capable of providing precise digital data |
KR1019880012755A KR910006081B1 (en) | 1987-09-30 | 1988-09-30 | Optical disk player |
DE3833330A DE3833330C2 (en) | 1987-09-30 | 1988-09-30 | Device for detecting a light beam from an optical memory |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24609587A JPS6489031A (en) | 1987-09-30 | 1987-09-30 | Information processor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6489031A true JPS6489031A (en) | 1989-04-03 |
Family
ID=17143414
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24609587A Pending JPS6489031A (en) | 1987-09-30 | 1987-09-30 | Information processor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6489031A (en) |
-
1987
- 1987-09-30 JP JP24609587A patent/JPS6489031A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
MY130581A (en) | Write once optical disc recording apparatus | |
DE3370393D1 (en) | Disc playback apparatus | |
JPS6446240A (en) | Disk device | |
JPS6489031A (en) | Information processor | |
JPS5589921A (en) | Optical recording and reproducing unit | |
JPS533305A (en) | Optical reproduction device | |
JPS5764342A (en) | Optical system recorder and reproducer | |
JPS575187A (en) | Recorder | |
CA2021744A1 (en) | Fast maximum likelihood decoder | |
JPS5773566A (en) | Information write-in method | |
JPS5589920A (en) | Duplicated recording prevention unit in optical recording and reproducing unit | |
JPS5778270A (en) | Video information input device | |
JPS6489032A (en) | Signal processor | |
JPS57135326A (en) | Photodetecting device | |
JPS5778266A (en) | Video information input deivce | |
GB1493264A (en) | Automatic gain control circuit | |
JPS53118012A (en) | Automatic tracking device | |
JPS6489033A (en) | Signal processor | |
JPS5543628A (en) | Printer | |
JPS6489035A (en) | Optical recording and reproducing device | |
JPS648513A (en) | Optical disk signal reproducing system | |
SU1038959A1 (en) | Photoelectric displacement converter | |
JPS6467750A (en) | Tracking controller | |
JPS578887A (en) | Beam recording device | |
JPS57114973A (en) | Scanning mechanism for optical reader |