Focusing light pen

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  • Details
  • Description
Date Introduced
ca. 1963
Photographer
Richards, Mark
Dimensions
3/4 x 6 1/4 x 3/4 in.
Manufacturer
Massachusetts Institute of Technology (MIT) Electronic Systems Laboratory
Copyright Owner
© Mark Richards
Location
United States
Keywords
Pointing; Input
Object ID
X406.84

Early light pens were not accurate enough for graphics. John Ward designed a pen with a focusing lens for the ESL Display Console (“The Kludge”). It was used for some of the earliest computer graphics research.