Abstract: A laser-based target detection system applicable for search-and-rescue type operations takes into account a plurality of optical attributes in the energy delivered to, and received from, a target-containing area so as to enhance effectiveness. In addition to analyzing the returned optical signature for sufficient energy reflected by a potential target at a primary laser wavelength, the system also senses the target's effect on a supplemental optical attribute, and only when sufficient amplitude at the primary wavelength is detected in conjunction with a substantial effect on the supplemental optical attribute is a valid target confirmed. In one embodiment, the supplemental optical attribute is amplitude at a wavelength other than the primary wavelength, with the system preferably looking for a high degree of attenuation at the non-primary wavelength.

Abstract: Heat loss is detected by means of an infrared scanner mounted on a wheeled vehicle that moves along a horizontal path. The scanner is arranged to view a thermal scene along vertical scan lines transverse to the vehicle path, and corresponding electrical signals are recorded for subsequent playback and processing into a continuous strip map. The strip map can then be interpreted to locate potential areas of high heat loss which can then be confirmed by physical inspection.