US Patent-Fourier domain terahertz coherence tomography (TCT)

United States Patent 9927355
Inventors:
Giles, Robert H. (Upton, MA, US) 
Sharma, Gargi (Revere, MA, US) 
Joseph, Cecil S. (Lowell, MA, US) 

http://www.freepatentsonline.com/9927355.html

A single-shot terahertz imaging system including an interferometer and a terahertz spectrometer. The interferometer includes a beam splitter configured to receive input terahertz radiation and output first terahertz radiation and second terahertz radiation, a sample configured to reflect the first terahertz radiation, and a mirror configured to reflect the second terahertz radiation. The beam splitter is further configured to receive the reflected first terahertz radiation and the reflected second terahertz radiation, and output interfered terahertz radiation. The terahertz spectrometer is configured to measure the interfered terahertz radiation and includes a frequency dispersive element configured to receive the interfered terahertz radiation and output spatially dispersed terahertz radiation, and a terahertz radiation detector configured to determine the intensity of the spatially dispersed terahertz radiation.