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photophone    

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英文字典中文字典相关资料:


  • Photophone - Wikipedia
    The photophone is a telecommunications device that allows transmission of speech on a beam of light
  • Alexander Graham Bell and the Photophone - ThoughtCo
    On June 3, 1880, Alexander Graham Bell transmitted the first wireless telephone message on his newly invented "photophone," a device that allowed for the transmission of sound on a beam of light
  • Alexander Graham Bell and the Photophone: The Forgotten Genesis of . . .
    While Bell eventually sold his photophone patent to the National Bell Telephone Company, the concept persisted quietly into the 20th century From the 1930s to the 1950s, infrared variations of the photophone facilitated secure naval communications over distances reaching up to 14 kilometers
  • Photophone – Joseph Henry Project - Princeton University
    Accounts of the photophone give a basic layout of its design The transmitter operated upon solar power; a series of lenses manipulated incoming rays to reflect off a flexible mirror
  • The Photophone - Scientific American
    For rapid communication between distant exploring or surveying stations, tbe photophone also promises to be serviceable
  • First optical telephone - Guinness World Records
    A device called the Photophone was invented jointly by Alexander Graham Bell and his assistant Charles Sumner Tainter on 19 February 1880, at Bell's laboratory at 1325 L Street in Washington DC, USA Bell's Photophone worked by projecting his voice through a mouthpiece onto a mirror
  • Photophone Re-invented | IEEE Conference Publication | IEEE Xplore
    Abstract: The photophone, invented by Alexander Graham Bell in 1880, is a telecommunication device that allows transmission of sound waves through beams of light
  • Physics:Photophone - HandWiki
    The photophone is a telecommunications device that allows transmission of speech on a beam of light
  • History of Information
    On April 1, 1880 American inventor Alexander Graham Bell and his then-assistant Charles Summer Tainter transmitted the first wireless telephone message on a beam of light for 213 meters between the roof of the Franklin School and the window of Bell's Washington, D C laboratory using the photophone





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