Range Gated Imaging
Range-gated imaging permits imaging at long ranges while minimizing the effect of obscurants (fog, rain, or smoke) in the atmosphere. Range-gating does not require ambient light sources and does not require a radiation signature emission (i.e. temperature difference) used by thermal imaging. A pulsed laser is used to illuminate the scene while the reflected light is detected by a camera with a short exposure time referred to as a gate. The gate is delayed so imaging occurs at a particular range, thus the image is only from the reflection of objects at that range.
It is possible to append additional distance information using a color code. This color code makes it possible to estimate the distance to observed objects.
Long, Medium and Short Range TI cameras
Thermal imaging cameras passively detect the thermal energy that is emitted by all objects and materials. Thermal cameras use the differentiation between the temperature of an object and the background temperature. A grey scale video image is generated with this differentiation, enables users to see more details at long range without losing situational awareness. The system also supports continuous zoom to maintain situational awareness with target focus in both a wide field of view and during zoom for effective target assessment. This capability ensures users always have an optimized field of view for targets at any range. Using a cooled detector, it provides exceptional long range performance with detection of man-sized targets beyond 18km and vehicles beyond 22km.