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Transillumination method

  • US 4,495,949 A
  • Filed: 06/13/1984
  • Issued: 01/29/1985
  • Est. Priority Date: 07/19/1982
  • Status: Expired due to Fees
First Claim
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1. A non-invasive and non-destructive examination method comprising the steps of:

  • illuminating the object to be examined with light comprising at least two different wavelengths;

    detecting light at each of said at least two different wavelengths which has passed through the illuminated object;

    recording information commensurate with the intensity of the detected light at each of said at least two different wavelengths, the information commensurate with the same points in the illuminated object being recorded at simultaneously readable locations;

    storing display correlated data values for each of a plurality of ratios of the information commensurate with the detected light at each of said at least two different wavelengths which may be recorded;

    employing said recorded information for the same points in the illuminated object to select stored display correlated data values; and

    employing the thus selected display correlated data values read to produce a display which represents the absorption characteristics of the object at the said at least two different wavelengths.

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