Far-infrared contraband-detection-system development for personnel-search applications
Experiments have been conducted toward the development of an active near-millimeter-wave, far infrared, personnel search system for the detection of contraband. These experiments employed a microwave hybrid tee interferometer/radiometer scanning system and quasi-optical techniques at 3.3-mm wavelength to illuminate and detect the reflection from target objects against a human body background. Clothing and other common concealing materials are transport at this wavelength. Retroreflector arrays, in conjunction with a Gunn diode radiation source, were investigated to provide all-angle illumination and detection of specular reflections from unaligned and irregular-shaped objects. Results indicate that, under highly controlled search conditions, metal objects greater than or equal to 25 cm/sup 2/ can be detected in an enclosure lined with retroreflectors. Further development is required to produce a practical personnel search system. The investigation and feasibility of alternate far infrared search techniques are presented. 23 figures, 2 tables.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6764367
- Report Number(s):
- SAND-82-0161; ON: DE83001029
- Country of Publication:
- United States
- Language:
- English
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& Accountability-- Technical Aspects
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
CHEMICAL EXPLOSIVES
DETECTION
ELECTROMAGNETIC RADIATION
ELEMENTS
EXPLOSIVES
FAR INFRARED RADIATION
FEASIBILITY STUDIES
IMAGES
INFRARED RADIATION
INSPECTION
INTERFEROMETERS
MEASURING INSTRUMENTS
METALS
OPTICS
PERSONNEL
PHYSICAL PROTECTION DEVICES
RADIATION DETECTORS
RADIATIONS
RADIOMETERS
REFLECTION
SECURITY
WEAPONS