Patent ID: 9377398
Filing Date: 2016-06-28
CPC Classification: G01N

Claim Text:
1. A liquid inspection method for checking whether an explosive, a raw material for explosive, or an illicit drug is contained in a liquid with which an optically transparent container for a drink is filled, comprising: a near-infrared irradiation step in which a substantially whole portion of the liquid is irradiated by an irradiation unit with near-infrared light having wavelengths of 650 to 1000 nm from outside the container; a near-infrared light reception step in which the near-infrared light passed through the liquid or the near-infrared light scattered by the liquid is received by a light reception unit; and an absorption spectrum analysis step in which an absorption spectrum of the received near-infrared light is analyzed, wherein whether an explosive, a raw material for explosive, or an illicit material is contained in a liquid with which the container is filled is checked by analyzing the absorption spectrum, the liquid is a drink which may contain the explosive, a raw material for an explosive or an illicit drug filled in the optically transparent container, the irradiation unit and the light reception unit are integrated, the near-infrared light is emitted by the irradiation unit into the container from a surface of the container to conduct the near-infrared irradiation step, and the near-infrared light scattered by the liquid is received through the surface of the container by the light reception unit to conduct the near-infrared light reception step.