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Optical flex sensor

  • US 4,937,444 A
  • Filed: 10/05/1989
  • Issued: 06/26/1990
  • Est. Priority Date: 09/29/1982
  • Status: Expired due to Term
First Claim
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1. An optical flex sensor which comprises:

  • (a) a flexible tube having two ends;

    (b) a light reflective material coated on the interior wall within said flexible tube;

    (c) at least one light source placed within a first end of said flexible tube; and

    (d) a photosensitive detector placed within a second end of said flexible tube to detect the intensity of a light ray impinging on said photosensitive detector when said flexible tube is bent, said detector providing a signal which varies according to the continuous extent of flexing of said tube.

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