Patent ID: 9360420
Filing Date: 2016-06-07
CPC Classification: G01J,G01N

Claim Text:
1. A terahertz time domain spectroscopy apparatus comprising: a laser light source; a generating unit configured to generate terahertz wave; a detection unit configured to detect the terahertz wave; an optical system configured to direct laser light from the laser light source to the generating unit or the detection unit; a driving unit configured to change an optical path length between the laser light source and the generating unit or the detection unit by moving the optical system; a processing unit configured to acquire a time-domain waveform of the terahertz wave based on a detection result of the detection unit, wherein the driving unit moves the optical system according to a first speed pattern and a second speed pattern different from the first speed pattern, and wherein the processing unit acquires the time-domain waveform based on a first detection result detected by the detection unit in a case where the optical system is moved according to the first speed pattern and a second detection result detected by the detection unit in a case where the optical system is moved according to the second speed pattern.