JPS54114045A - Information detecting system - Google Patents
Information detecting systemInfo
- Publication number
- JPS54114045A JPS54114045A JP2109478A JP2109478A JPS54114045A JP S54114045 A JPS54114045 A JP S54114045A JP 2109478 A JP2109478 A JP 2109478A JP 2109478 A JP2109478 A JP 2109478A JP S54114045 A JPS54114045 A JP S54114045A
- Authority
- JP
- Japan
- Prior art keywords
- current
- current value
- detector
- emitted
- laser
- 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 draw out the signal featuring a high S/N ratio by combining the interaction of the optical driving system and the information detection system and then securing the self-amplifying action for the detection signal via the multiple effect of the both systems.
CONSTITUTION: When switch 10 is turned on to supply the driving current approximate to the threshold level to semiconductor laser element 2 from power source 5, the laser beam is emitted from the output surface of semiconductor laser unit 8. The emitted laser beam is modulated via information storage carrier 9 to be irradiated to photo detector 6, and thus the electric resistance value of the optical conductor is reduced. As a result, the current value flowing through element 2 is increased with increment of the laser output beam. In case the output beam does not pass through carrier 9, no current amplification is caused to the driving circuit. Thus, element 2 is driven with the current value as it is. The change of the current value is detected through current detector 7 in order to detect the storage information via detector 7.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2109478A JPS54114045A (en) | 1978-02-24 | 1978-02-24 | Information detecting system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2109478A JPS54114045A (en) | 1978-02-24 | 1978-02-24 | Information detecting system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54114045A true JPS54114045A (en) | 1979-09-05 |
Family
ID=12045276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2109478A Pending JPS54114045A (en) | 1978-02-24 | 1978-02-24 | Information detecting system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54114045A (en) |
-
1978
- 1978-02-24 JP JP2109478A patent/JPS54114045A/en active Pending
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