JPS5541068A - Photo video information system - Google Patents

Photo video information system

Info

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
Application number
JP11494778A
Other languages
Japanese (ja)
Inventor
Seiichi Takeuchi
Masaru Ikeuchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP11494778A priority Critical patent/JPS5541068A/en
Publication of JPS5541068A publication Critical patent/JPS5541068A/en
Pending legal-status Critical Current

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
JP11494778A 1978-09-19 1978-09-19 Photo video information system Pending JPS5541068A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56140067A (en) * 1980-03-29 1981-11-02 Nippon Tungsten Ceramic sintered body and manufacture

Cited By (1)

* Cited by examiner, † Cited by third party
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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