NIST has developed a state-of-the-art passive millimeter-wave imaging system using cryoelectronic sensor arrays. The system, developed by the NIST Security Technologies Group in collaboration with the NIST Quantum Electromagnetics Division, will serve as the basis for creating test artifacts, evaluation protocols, and international standards for millimeter-wave imaging technology.
The imaging system utilizes an f/2.0 Cassegrain optical system with a 1.3 m primary mirror, and operates at 350 GHz with a 10% bandwidth. The focal plane is cooled to 950mK, allowing the use of superconducting transition edge sensor (TES) bolometers for detection. The system can image stationary and non-stationary objects at video rates from a standoff distance of 10 m to 20 m, demonstrating its capability to detect concealed weapons beneath clothing.
Source: https://www.nist.gov/mml/mmsd/security-technologies-group/millimeter-wave-imaging
Keywords: millimeter-wave, imaging, security screening
