Bias voltage optimization for high signal-to-noise ratio microbolometric focal plane array

To increase the output signal-to-noise ratio of microbolometric focal plane array, the microbolometric bias optimization is crucial. The bias influence on the microbolometric responsivity is theoretically analyzed and numerically calculated, and the microbolometric responsivity can be optimized according to these theoretical analysis and calculated results. Some kinds of microbolometric noises are also theoretically discussed, from which the microbolometric noise can be theoretically derived to be related to the microbolometric bias parameter through numerical calculation. The bias optimization for microbolometric focal plane array can be obtained through the integrative effect of the microbolometric responsivity and current noise. These analysis and numerical calculation for the microbolometric bias optimization are theoretically strict and algorithmically reasonable, which has been experimentally verified in our laboratory. The bias parameter optimization method in this paper has guidable significance for high signal-to-noise ratio microbolometric focal plane array to detect low infrared radiation target.