Control, calibration and operation of a microbolometer matrix

摘要

A method for measuring the temperature of a scene using a detector array with an integrating sampling circuit associated with each pixel. An ambient reference temperature is observed with reference pixels to provide a parameter of that temperature to provide a constant voltage output indicating that temperature by varying the sampling circuit integration time. Each non-reference pixel is exposed to different scene and ambient temperatures and the integration time for each set of data for each pixel is recorded. For each pixel, an equation is created relating integration time to pixel voltage when the ambient temperature and the scene temperature are the same to correct for offsets and an equation is created relating integration time and offset correlated pixel value to the difference between the ambient temperature and the scene temperature when the ambient temperature and scene temperature differ for correction of responsivity.