×

Detection system and method of detecting corrosion under an outer protective layer

  • US 9,518,918 B2
  • Filed: 09/23/2013
  • Issued: 12/13/2016
  • Est. Priority Date: 02/25/2013
  • Status: Active Grant
First Claim
Patent Images

1. A method of detecting the presence of anomalies in or on a substrate covered by a protective coating or layer, the method comprising:

  • observing reflectivity from the substrate arising from incident electromagnetic waves produced from wide-angled illumination from a first incoherent passive source, the incident electromagnetic waves having millimeter or sub-millimeter wavelengths or having a frequency below about thirty terahertz;

    identifying the presence of anomalies in the substrate by at least one of;

    contrasting observed reflectivity in adjacent areas of the substrate, andcontrasting observed reflectivity of an area of the substrate under test against a reference reflectivity value anticipated for the area of the substrate under test;

    observing reflectivity from the substrate arising from incident electromagnetic waves produced from wide-angled illumination from an incoherent active source that is different to the first incoherent passive source, the incident electromagnetic waves from the incoherent active source having millimeter or sub-millimeter wavelengths or having a frequency below about thirty terahertz; and

    identifying the presence of anomalies in the substrate by contrasting spectral reflectivity profiles observed from the passive source and the active source.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×