selenium

1 photo tagged selenium, from 1 member of Flickr Commons.

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2009

 

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Apparaat maakt licht hoorbaar voor blinden / Blind man hearing light

from Nationaal Archief

  • pennylrichardsca (now at ipernity) said:
    Hi, I'm an admin for a group called Disability History, and we'd love to have this added to the group!
  • pennylrichardsca (now at ipernity) said:
    The man is holding an "Exploring Optophone," invented by physicist E. E. Fournier d'Albe (1868-1933) and first exhibited in 1912 at the Optical Convention, South Kensington. It used a selenium detector to control a sound output. D'Albe went on to invent a "Reading Optophone," which attempted to convert text into sound. See Michael Capp and Phil Picton, "The Optophone: An Electronic Blind Aid," Engineering Science and Education Journal (June 2000): 137-143.