To maintain optimum resolution under varying environmental conditions, a focusing compensation system has been developed. The system is capable of detecting not only changes in pressure (altitude) and the general lens temperature but also the radial thermal gradients in the lens. Theoretical considerations show that the lens is most affected by these factors. The developed system uses a laser measurement system with environmental sensors to generate a focus correction for environment and range changes.
Focus compensation techniques for reconnaissance
Airborne reconnaissance IV
1979-01-01
Miscellaneous
No indication
English
European Patent Office | 2020
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