Applied physics
N 1, 2003

Calculation of utmost parameters of active vision system based on non-scanning thermal imager

A. N. Sviridov
State Unitary Enterprise «RD&P Centre "Orion"», Moscow, Russia

   An active vision system (AVS) based on a non-scanning thermal imager and CO2-quantum image amplifier is offered. AVS mathematical model within which investigation of utmost signal/noise values and other system parameters depending on the distances to objects under observation (OO), illumination pulse energy (W), amplification factor (K) of quantum amplifier, objective lens characteristics, spectral band width of a cooled filter of a thermal imager as well as OO characteristics and a scene is developed. As a result of carried out researches the opportunity and expediency of designing AVS, having a non-scanning thermal imager, pulse CO2-quantum image amplifier and pulse CO2-illumination laser is shown. Is shown that AVS have advantages over thermal imaging at observation of objects, temperature and reflection factors of which differ slightly from similar parameters of the scene. Basically, AVS have no similar restrictions and depending on WK product can detect at a distance of up to 3000…—5000 m practically and local changes (you are interested in) of a reflection factor. AVS not replacing thermal imaging allow to receive additional information about OO. The images received with the help of AVS are more natural and recognized more easy than thermal images received at the expense of OO own radiation. For quantitative determination of utmost values of AVS sensitivity it is offered to introduce a new parameter NERD — radiation nose equivalent reflection factors difference.

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