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Borehole inspection instrument having a low voltage, low power fiber optic light-head

  • US 6,580,449 B1
  • Filed: 07/18/2000
  • Issued: 06/17/2003
  • Est. Priority Date: 07/18/2000
  • Status: Expired due to Term
First Claim
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1. An inspection instrument for insertion into a borehole for viewing the condition and contents of the borehole, the inspection instrument connected to a surface station by means of a cable, the inspection instrument comprising:

  • a housing having a longitudinal axis, a proximal end, and a distal end, the proximal end connected to the cable;

    a camera enclosed within the housing and having a field of view outside the housing;

    a light source enclosed within the housing and separated longitudinally from the camera;

    an elliptical reflector disposed about the light source to reflect light generated by the light source to a focal point;

    a light conductor having a proximal end disposed at the focal point for receiving light reflected by the reflector, the light conductor having a distal end disposed at the camera and oriented to radiate light into the field of view of the camera.

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