Patent ID: 11867621
Assignee: NIKON CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A terahertz light detector comprising:
a pulse laser that generates pulse light;
a control unit that controls an energy of the pulse light emitted from the pulse laser by a variable gain optical amplifier or a modulator;
an optical member having an anomalous dispersion and which the pulse light whose energy is controlled by the control unit enters; and
a light reception unit that receives the terahertz light from a measured object and that outputs a signal that is dependent on an intensity of the terahertz light received from the measured object when the pulse light emitted from the optical member enters the light reception unit, wherein
the optical member causes the pulse light whose energy is controlled by the control unit to have a delay time corresponding to the energy of the pulse light, and
the light reception unit performs detection of each of different positions on a time domain waveform of one measured terahertz light received from the measured object and outputs the signal by changing a timing of the detection.