Patent ID: 9071776
Filing Date: 2015-06-30
Classification: G01N,H04N

Abstract:
1. A reflective imaging device, comprising: a light source for generating a terahertz wave; a holder for holding a sample unit; an optical system for causing the terahertz wave from the light source to enter an entire surface of the sample unit; a camera including a two-dimensional array sensor for detecting the terahertz wave reflected by the sample unit; a rotation mechanism for rotating the holder to change, in a predetermined angle range, an incident angle of the terahertz wave which enters the sample unit and for rotating the camera so that the terahertz wave reflected by the sample unit is collected to the camera; and a processing unit for processing a signal output from the camera, wherein: the sample unit comprises, from an incident side of the terahertz wave: the sample comprises: the camera detects a terahertz wave in which interference occurs between a component reflected at an interface between the incidence member and the sample of the sample unit and a component reflected at an interface between the sample and the reflection member of the sample unit, with regard to respective incident angles in the predetermined angle range, and outputs a signal in accordance with a strength of the detected terahertz wave; and the processing unit specifies an incident angle at which a signal of a first terahertz wave that interferes in the first region is relatively small and a signal of a second terahertz wave that interferes in the second region is relatively large, and generates a two-dimensional image of the sample based on the signal output by the camera after the detection with regard to the specified incident angle.