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Fiber optical measuring device for measuring dynamic movements

  • US 4,581,528 A
  • Filed: 05/26/1983
  • Issued: 04/08/1986
  • Est. Priority Date: 05/27/1982
  • Status: Expired due to Term
First Claim
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1. In a fiber optical measuring device for sensing dynamic movements between two boundary surfaces where a first of said two boundary surfaces constitutes an end surface of an elongated optical fiber and a second of said boundary surfaces constitutes the surface of a movement-sensing body, said optical fiber being adapted to transmit optical energy to and from said first and second boundary surfaces, the improvement whereinat least one of said first and second boundary surfaces is constituted by a photo-luminescent material,wherein said first and second boundary surfaces are so arranged that the optical energy reflected from said second boundary surface becomes dependent on the relative position between said boundary surfaces,wherein said movement-sensing body is secured to said optical fiber and comprises a resilient portion permitting relative movements between said two boundary surfaces, andwherein at least one of said boundary surfaces extends at angle with the elongated direction of said optical fiber which is different from 90°

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