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GB1293890A - Arrangement for converting electrical signals into optical signals - Google Patents

Arrangement for converting electrical signals into optical signals

Info

Publication number
GB1293890A
GB1293890A GB3109371A GB3109371A GB1293890A GB 1293890 A GB1293890 A GB 1293890A GB 3109371 A GB3109371 A GB 3109371A GB 3109371 A GB3109371 A GB 3109371A GB 1293890 A GB1293890 A GB 1293890A
Authority
GB
United Kingdom
Prior art keywords
lamp
voltage source
arrangement
source
ignition
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.)
Expired
Application number
GB3109371A
Inventor
Ulrich Plauschin
Dieter Muller
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.)
Berlin Brandenburg Academy of Sciences and Humanities
Original Assignee
Berlin Brandenburg Academy of Sciences and Humanities
Deutsche Akademie der Wissenschaften zu Berlin
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 Berlin Brandenburg Academy of Sciences and Humanities, Deutsche Akademie der Wissenschaften zu Berlin filed Critical Berlin Brandenburg Academy of Sciences and Humanities
Priority to GB3109371A priority Critical patent/GB1293890A/en
Publication of GB1293890A publication Critical patent/GB1293890A/en
Expired 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
    • H04B10/50—Transmitters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/40025—Circuits exciting or modulating particular heads for reproducing continuous tone value scales

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

1293890 Light modulators DEUTSCHE AKADEMIE DER WISSENSCHAFTEN ZU BERLIN 2 July 1971 31093/71 Heading H4F In a light modulator, a gas discharge lamp G is connected through a resistor R to a voltage source U 0 and via a diode D to a current source S. Ignition is controlled by a semi-conductor arrangement H, e.g. a plurality of series connected transistors with associated voltage dividers in turn controlled by duration or frequency modulated pulses. When a pulse is applied, the semi-conductor arrangement becomes conductive and the lamp is ignited by voltage source U o so that a current flows through the lamp from the source S which remains unchanged from one pulse to another. In a modification, the semiconductor arrangement is connected across the lamp so that current flows only when the semiconductor arrangement is blocked. In these arrangements a high resistance voltage source is used. If a low resistance voltage source is used, electronic switching to connect it to the lamp only for the duration of the ignition is required.
GB3109371A 1971-07-02 1971-07-02 Arrangement for converting electrical signals into optical signals Expired GB1293890A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3109371A GB1293890A (en) 1971-07-02 1971-07-02 Arrangement for converting electrical signals into optical signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3109371A GB1293890A (en) 1971-07-02 1971-07-02 Arrangement for converting electrical signals into optical signals

Publications (1)

Publication Number Publication Date
GB1293890A true GB1293890A (en) 1972-10-25

Family

ID=10317856

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3109371A Expired GB1293890A (en) 1971-07-02 1971-07-02 Arrangement for converting electrical signals into optical signals

Country Status (1)

Country Link
GB (1) GB1293890A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3545147A1 (en) * 1984-12-21 1986-07-03 The Gerber Scientific Instrument Co., South Windsor, Conn. FLASH LAMP UNIT
US4649322A (en) * 1984-02-03 1987-03-10 Omega Electronics S.A. Energizing arrangement for controlling the luminous intensity of at least one discharge lamp and use of such arrangement

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4649322A (en) * 1984-02-03 1987-03-10 Omega Electronics S.A. Energizing arrangement for controlling the luminous intensity of at least one discharge lamp and use of such arrangement
AU578263B2 (en) * 1984-02-03 1988-10-20 Omega Electronics S.A. Controlling luminous intensity of discharge lamp
DE3545147A1 (en) * 1984-12-21 1986-07-03 The Gerber Scientific Instrument Co., South Windsor, Conn. FLASH LAMP UNIT

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees