×

Optical displacement detection over varied surfaces

  • US 20070008286A1
  • Filed: 06/20/2006
  • Published: 01/11/2007
  • Est. Priority Date: 06/30/2005
  • Status: Active Grant
First Claim
Patent Images

1. A method of determining the distance between an optical displacement detection system and a diffusing surface below a layer of material that passes at least some light through the layer, the layer having a top surface and a bottom surface, the method comprising:

  • receiving light reflected from the top surface of the layer at a first portion of a detector;

    receiving light reflected from the bottom surface of the layer at a second portion of the detector;

    receiving light from the diffusing surface at a third portion of the detector;

    determining the distance between an optical displacement detection system and the diffusing surface by determining the distance between at least one of the first, second, and third portions of the detector.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×