JPS5489756A - Light monitor apparatus - Google Patents
Light monitor apparatusInfo
- Publication number
- JPS5489756A JPS5489756A JP15881777A JP15881777A JPS5489756A JP S5489756 A JPS5489756 A JP S5489756A JP 15881777 A JP15881777 A JP 15881777A JP 15881777 A JP15881777 A JP 15881777A JP S5489756 A JPS5489756 A JP S5489756A
- Authority
- JP
- Japan
- Prior art keywords
- light
- diode
- prism
- semiconductor
- transmission path
- 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 Communication System (AREA)
Abstract
PURPOSE: To reduce insertion loss and correctly monitor the change of light signals by reflecting the light emitting from a light transmission path on a photo detector surface through an optical medium and detecting the absorption light produced at the time of performing this reflection.
CONSTITUTION: Light emitted from a light transmission path 1 enters a photo diode 3 through a prism 10 and the reflected light enters an optical transmission path 2 through the prism 10. The use of this prism enables the insertion angle of the transmission paths to be taken freely to a certain extent and enables the provision of the transmission paths to be made easier. In addition, even if the axes of the transmission paths are inclined to the surface of the diode 3, the light entering the semiconductor assumes the angle close to perpendicular with respect to the semiconductor surface on acount of a high refractive index of the semiconductor, thus it is efficiently detected with the diode 3, producing an electric output between electrodes 4, 5. If a Schottky barrier type is used as the photo diode 3, the reflection may be accomplished efficiently by the Schottky metal 6.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15881777A JPS5489756A (en) | 1977-12-27 | 1977-12-27 | Light monitor apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15881777A JPS5489756A (en) | 1977-12-27 | 1977-12-27 | Light monitor apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5489756A true JPS5489756A (en) | 1979-07-17 |
Family
ID=15680004
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15881777A Pending JPS5489756A (en) | 1977-12-27 | 1977-12-27 | Light monitor apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5489756A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59174035A (en) * | 1983-03-23 | 1984-10-02 | Yagi Antenna Co Ltd | Space optical demodulator |
JPS59174033A (en) * | 1983-03-23 | 1984-10-02 | Yagi Antenna Co Ltd | Space optical modulating and demodulating device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5156238A (en) * | 1974-11-12 | 1976-05-17 | Nippon Telegraph & Telephone | |
JPS5171148A (en) * | 1974-11-11 | 1976-06-19 | Western Electric Co |
-
1977
- 1977-12-27 JP JP15881777A patent/JPS5489756A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5171148A (en) * | 1974-11-11 | 1976-06-19 | Western Electric Co | |
JPS5156238A (en) * | 1974-11-12 | 1976-05-17 | Nippon Telegraph & Telephone |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59174035A (en) * | 1983-03-23 | 1984-10-02 | Yagi Antenna Co Ltd | Space optical demodulator |
JPS59174033A (en) * | 1983-03-23 | 1984-10-02 | Yagi Antenna Co Ltd | Space optical modulating and demodulating device |
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