Passive Millimeter-Wave Weapons-Detection System—Brijot

Brijot Imaging Systems, Inc.,17 in conjunction with Lockheed Martin, is developing an automated target-recognition-based concealed-weapons-detection system to detect and identify weapons underneath a person’s clothing. It consists of a millimeter-wave camera combined with a videocamera and special algorithm software. Outputs are a real-time video with visual identification of where a suspicious item is located on a person and electronic alarm notification signaling. The camera system is completely passive and is designed to operate at a range of up to 45 feet.

Millimeter-Wave Imaging—Millivision

The Millivision camera uses focal-plane-array technology, an imaging process that employs receiver elements positioned along the focal plane of the optical system. In addition to using a primary lens, optic filters, wave plates, and other elements, the Millivision imagers use a new class of optics employing arrays of wave-processing monolithic microwave integrated circuit (MMIC) chips from HRL (Malibu, California). The chips, which are made from indium phosphide, amplify the weak signals and perform the signal-processing functions on the electromagnetic waves. (The Millivision patents have been acquired by the L-3 Corporation.)

Conclusion: Millimeter-wavelength/terahertz technology in portal applications has been demonstrated for detecting and identifying objects concealed on people.

Recommendation: The Transportation Security Administration should commence developmental and operational testing of millimeter-wave-based portals to assess their effectiveness and suitability.

Conclusion: Universities, national laboratories, and the commercial sector (both national and international businesses) continue to increase investment in millimeter-wavelength/ terahertz technologies for security, medical, nondestructive inspection, and manufacturing quality-control applications.

Recommendation: The Transportation Security Administration should actively pursue joint projects through agreements such as cooperative research and development agreements with industry, academia, the Department of Defense, and the national laboratories to benefit from their investments in millimeter-wavelength/terahertz technology and applications.


Brijot Imaging Systems, Inc. 2006. BIS-WDS™ Prime. Available at Accessed August 28, 2006.

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