Calculation of optical systems for the infrared spectral range used for the detection of small pockets of fire from geostationary orbit

The article discusses the possibility of detection of small fires from geostationary orbit, using optical systems operating in the IR-range. In the time of the scientific and technological revolution, forest protection has become one of the most pressing issues. Forest fires are a powerful natural and anthropogenic factor which significantly alters the function and condition of the forest. Forest fires cause damage to the environment, the economy, and often lives are under threat. According to statistics, 93 % of all forest fires are a 10-kilometer suburban area, which means that they are the fault of the local population. Strong fires from lightning are rare, approximately 2 % of cases as a thunderstorm is usually accompanied by rain. Therefore, it is extremely important to continuously follow precisely the southern districts of the region, home to the vast number of people. With the help of a special optimization program CODE V, the optical wide-angle telescope was numerically investigated. Using a high-aperture optical system f / 1,5, allowing the CCD-matrix size 8k x 8k, get a spatial resolution of 200 m per pixel from GSO. The optical system is a system of direct focus with three-lens corrector in a converging beam. All surfaces of the lens and the main mirror are aspherical surfaces. Given are the design parameters and the quality of graphics images. There is a possibility to conduct almost continuous monitoring of large areas of the earth surface for the search of small fires - up to 1-2 hectares if you put the calculated optical system in geostationary orbit.