Passive Millimeter-Wave Imaging System

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Maspro Denkoh Corp. Japan is proud to announce that we have commenced to develop “Passive Millimeter-Wave Imaging System” coordinated with Chuo Electronics Co.Ltd., and Tohoku University sponsored by the Ministry of Education, Culture, Sports, Science and Technology.

Since Passive Millimeter-Wave imaging technology has been continued research for Military Applications overseas, this system is said to be the new generation of “Security System” at the Airports, seaports, where X-Ray detectors are currently used.

Maspro Denkoh Corp.Japan is planning to commercialize this system within 3 years.

After 9・11 incident in USA, the threats by the terrorists are increasing world wide. Hand-Carry Bags, Clothes are heavily inspected at the various Airports/Seaports/Stations.　Metal Detector can identify metals, but very difficult to detect Liquids, Plastics, or powders which may be ingredient for Explosives. Therefore the detector, which is in non-intrusive and non-contact manner, is highly needed urgently.

Concealed threat objects Difficult to detect Liquids/Plastics/Powders by using Metal Detector

All natural materials including Human always radiate thermal noise in Millimeter-Wave range. Especially, the thermal noise from the Human Body, which has the body temperature is stronger than the other object thermal noise. So this system is to do image-processing by forming images corresponding to power distribution of Millimeter-Wave.
Millimeter-Wave can propagate through clothes, paper, or even fire and smoke. This feature differentiate from Infrared camera, which detects only the surface temperature of Objects, and this system can identify concealed threat objects.

Basic Theory of PMMW(Passive Millimeter-Wave)

Collecting Millimeter-Wave(77Ghz thermal noise) by Dielectric Lens.
Bundling MM Wave , then extracting signals amplified by Image Sensor Array.
Image-Processing of extracted signals.

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