Patent ID: 7569825
Filing Date: 2009-08-04
Classification: G01N,G07D

Abstract:
1. An inspection device for inspecting an object passing on a conveyance path, comprising: an upper conveyance guide plate and a lower conveyance guide plate defining the conveyance path and separated by a clearance in a range from about 2 mm to about 3 mm; an illumination portion illuminating the object with light in a plurality of wavelength bands; at least one light-receiving and detecting element detecting light from the object; and a discrimination processing portion discriminating the object by combining data from a plurality of detection signals obtained by the light-receiving and detecting element which detects the light from the object substantially within an identical period of time when the illuminating portion illuminates the object with the light in the plurality of wavelength bands, and by comparing and collating combined data with preset reference data, wherein the discrimination processing portion obtains, as the combined data, a ratio of a plurality of detected values obtained by the light-receiving and detecting element which detects the light from the object substantially within an identical period of time when the illuminating portion illuminates the object, while in the conveyance path, with the light in the plurality of wavelength bands.