Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1994-05-27
1996-10-29
Turner, Samuel A.
Optics: measuring and testing
By particle light scattering
With photocell detection
356360, G01D 902
Patent
active
055701825
ABSTRACT:
A method for detecting the presence of active and inactive caries in teeth and diagnosing periodontal disease uses non-ionizing radiation with techniques for reducing interference from scattered light. A beam of non-ionizing radiation is divided into sample and reference beams. The region to be examined is illuminated by the sample beam, and reflected or transmitted radiation from the sample is recombined with the reference beam to form an interference pattern on a detector. The length of the reference beam path is adjustable, allowing the operator to select the reflected or transmitted sample photons that recombine with the reference photons. Thus radiation scattered by the dental or periodontal tissue can be prevented from obscuring the interference pattern. A series of interference patterns may be generated and interpreted to locate dental caries and periodontal tissue interfaces.
REFERENCES:
patent: 5155363 (1992-10-01), Steinbichler et al.
Kinney John H.
Nathel Howard
Otis Linda L.
Grzybicki Daryl S.
Regents of the University of California
Sartorio Henry P.
Turner Samuel A.
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