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NIST Authors in Bold
|Author(s):||Erich N. Grossman; Charles Dietlein;|
|Title:||Passive terahertz camera for standoff security screening|
|Published:||July 01, 2010|
|Abstract:||We describe the construction and performance of a passive, real-time terahertz camera based on a modular, 64-element linear array of cryogenic hotspot microbolometers. A reflective conical scanner sweeps out a 2 m ×4 m(vertical × horizontal) field of view (FOV) at a standoff range of 8 m. The focal plane array is cooled to 4 K in a closed cycle refrigerator, and the signals are detected on free-standing bridges of superconducting Nb or NbN at the feeds of broadband planar spiral antennas. The NETD of the focal-plane array, referred to the target plane and to a frame rate of 5 s−1, is 1:25 K near the center of the array and 2 K overall.|
|Pages:||pp. 106 - 120|
|Research Areas:||Nanotechnology, Optoelectronics|
|PDF version:||Click here to retrieve PDF version of paper (2MB)|