Patent ID: 9575045
Date: 2017-02-21
CPC Classifications: G01N

Claim:
1. A method of identifying a material on a body of a person using electromagnetic radiation, comprising: a) measuring, by a radar system, a first reflection of radiation incident on a body of a person, the first reflection from a surface of the body; b) measuring, by the radar system, a second reflection of the radiation through a material residing on or proximate to the surface of the body; c) measuring, by the radar system, a third reflection of the radiation from a surface of the material; d) generating, by a processor of the radar system, (i) a first electromagnetic-based image depicting the first reflection in relation to a location of the person, (ii) a second electromagnetic-based image depicting the second reflection in relation to the location of the person and (iii) a third electromagnetic-based image depicting the third reflection in relation to the location of the person, wherein the depiction of the second reflection is displaced relative to the depiction of the first reflection by a first displacement on the image corresponding to a delay in the second reflection due to propagation of a portion of the radiation through the material, and the depiction of the third reflection is displaced relative to the depiction of the first reflection by a second displacement on the image; and e) determining, by the processor, using a ratio of the first displacement and the second displacement, a dielectric constant of the material.