JPS57157645A - Optical transmission device - Google Patents

Optical transmission device

Info

Publication number
JPS57157645A
JPS57157645A JP56042487A JP4248781A JPS57157645A JP S57157645 A JPS57157645 A JP S57157645A JP 56042487 A JP56042487 A JP 56042487A JP 4248781 A JP4248781 A JP 4248781A JP S57157645 A JPS57157645 A JP S57157645A
Authority
JP
Japan
Prior art keywords
signal
photodetector
light
information
lens systems
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
JP56042487A
Other languages
Japanese (ja)
Inventor
Masahiro Sakakibara
Masayuki Takami
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP56042487A priority Critical patent/JPS57157645A/en
Publication of JPS57157645A publication Critical patent/JPS57157645A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/03—Arrangements for fault recovery
    • H04B10/032—Arrangements for fault recovery using working and protection systems

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To remove external noises and to prevent deterioration in information grades, by installing plural luminous elements and photodetectors at each of terminal light transmitting and receiving stations, and a shielding device between lens systems and the photodetectors. CONSTITUTION:A shielding device 17 is installed between lens systems 12, 13 and photodetector 15, 16. An optical information signal transmitted from a central station through an optical fiber 4 is converted into a signal which drives luminous elements 9, 10 by a terminal transmitting station 2, and the same optical signal is transmitted from the elements 9, 10. The optical signal is converted into two parallel rays spaced an angle theta apart from each other by lens systems 11, 12. When a deterioration in the grade of information or a condition impossible for reception occurs, a signal is generated in a receiving station 5 by using the light receiving signal of the photodetector 16 and the device 17 is driven, so that the light will not converge upon the photodetector 16. Therefore, the light reception is performed at another system composed of the element 9, the lens system 11, a lens system 14, and the photodetector 15.
JP56042487A 1981-03-25 1981-03-25 Optical transmission device Pending JPS57157645A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56042487A JPS57157645A (en) 1981-03-25 1981-03-25 Optical transmission device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56042487A JPS57157645A (en) 1981-03-25 1981-03-25 Optical transmission device

Publications (1)

Publication Number Publication Date
JPS57157645A true JPS57157645A (en) 1982-09-29

Family

ID=12637414

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56042487A Pending JPS57157645A (en) 1981-03-25 1981-03-25 Optical transmission device

Country Status (1)

Country Link
JP (1) JPS57157645A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014016809A (en) * 2012-07-09 2014-01-30 Stanley Electric Co Ltd Inter-vehicle optical communication device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014016809A (en) * 2012-07-09 2014-01-30 Stanley Electric Co Ltd Inter-vehicle optical communication device

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