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This system workls by the change detection methode. Here we scann and memmorizethe area of interest. This is memmorized like a 3D high accuracy map. After this we scann all time lookimng for differences in shape. Whene there is some FOD at surface we sense the 3D difference in shape and the com,puter make an alarm if somethingis there. The global coordinate is measured with an accuracy of between 5 mm and 2-3 cm. The shape and profile of the FODis also measured with a sub cm accuracy even at ranges of 100-300 meter.

• FOD scanner system of a tripod installed portable system
• Example of a system at a runway
• Test set up when tested for resolution that was in the 3 mm range
• Tests of height resolution for a FOD simulation test
• Change detection image with tools on asphalt marked in yellow
• Tests of lateral FOD resolution when a 3D shaped object is scanned at 70 meter
• Tests at Stockholm Arlanda airport with high accuracy laser radar system

Keywords for airports. Intruder detector, intruder detection, obstacle detector ,obstacle detection, ground radar , night vision camera , thermal camera, low level camera, surveillance camera, runway camera , debris detector , debris detection, runway lamp , runway lamps, taxi lamps, taxi lamp, anti terrorist systems airport security, airport security systems, airport surveillance, laser camera, ladar , laser radar, gated camera , active camera, active laser camera, fog penetration camera, fod detector debris detector