JPS5541068A - Photo video information system - Google Patents
Photo video information systemInfo
- Publication number
- JPS5541068A JPS5541068A JP11494778A JP11494778A JPS5541068A JP S5541068 A JPS5541068 A JP S5541068A JP 11494778 A JP11494778 A JP 11494778A JP 11494778 A JP11494778 A JP 11494778A JP S5541068 A JPS5541068 A JP S5541068A
- Authority
- JP
- Japan
- Prior art keywords
- light
- signal
- wave length
- receiver
- modulated
- 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 easily enable to add the service channel, by using the vacant channel of the receiver of subscribers, through the addition of the receiver channel modulator, light synthesizer, and light brancher.
CONSTITUTION: The system employs he light synthesizer 8, light branch unit 9, additional picture source 10, receiver channel modulator 11, light signal transmitter (emitted light wave length λ2) 12, and light signal receiver (wave length λ2), and the base band video signal from the picture source 10 is modulated into VHF band television signal of vacant channel at the modulator 11, and this television signal is the modulation signal of light from the light source at the transmitter 12. Further, the light signal in wave length λ1 modulated with the base band video signal and that in wave length λ2 modulated from the VHF band television signal are synthesized 8 and it is delivered with the optical fiber 5 and again branched 9 into respective light signals.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11494778A JPS5541068A (en) | 1978-09-19 | 1978-09-19 | Photo video information system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11494778A JPS5541068A (en) | 1978-09-19 | 1978-09-19 | Photo video information system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5541068A true JPS5541068A (en) | 1980-03-22 |
Family
ID=14650586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11494778A Pending JPS5541068A (en) | 1978-09-19 | 1978-09-19 | Photo video information system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5541068A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56140067A (en) * | 1980-03-29 | 1981-11-02 | Nippon Tungsten | Ceramic sintered body and manufacture |
-
1978
- 1978-09-19 JP JP11494778A patent/JPS5541068A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56140067A (en) * | 1980-03-29 | 1981-11-02 | Nippon Tungsten | Ceramic sintered body and manufacture |
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