Transillumination method
First Claim
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.
3 Assignments
0 Petitions
Accused Products
Abstract
A non-destructive testing technique, particularly suitable for the non-invasive examination of human body tissue, wherein the object of interest is transilluminated with multi-wavelength light. Apparatus for practicing the technique generates transillumination light containing different colors and the light which passes through the tissue is divided and filtered to provide plural light beams lying in separate wavelength ranges. These light beams are detected by a video system which provides information bearing signals to data processing circuitry which determines the transmissivity at each wavelength of each point of the object within the viewing field.
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Citations
11 Claims
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1. A non-invasive and non-destructive examination method comprising the steps of:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification