The term "night vision" refers to the ability to see in situations where there is limited or no light. This capability is critical in many security and defense applications.
The three most common types of night vision technologies are:
- Thermal Imaging (passive)
- Low Light Level Imaging (passive)
- Low Light Level Imaging (active)
Infrared Night Vision Cameras
CONTROP's Thermal Imaging camera systems
are based on a night vision technology which does not require any light what-so-ever. They produce a black and white image even in total darkness (optionally pseudo color)and operate on the principle that all objects emit infrared radiation, proportional to the temperature of the object. The camera uses the infrared radiation from the targets of interest and the background scene being viewed, and turns this information into an image map of minute temperature differences of the scene and target. This technology uses what is recognized as the Mid-band and Long-band of the thermal radiation spectrum. The warmer an object is (for example, a person's body), the more radiation it emits relative to a colder background, and vice-versa.
CONTROP's night vision surveillance cameras include sophisticated image enhancement algorithms, thus allowing the production of extremely well-defined image of the smallest temperature differences in the scene, while at the same time can handle a very large dynamic range within the scene (large variation of temperatures in the scene), making them appropriate for surveillance of short, medium as well as long range distances.