An Analytical Model for Detectivity Prediction of Uncooled Bolometer Considering all Thermal Phenomena Effects

In this paper, we proposed an approach for analyzing uncooled infrared bolometer detector. The model is taken into account temperature dependence of Thermal Coefficient of Resistance (TCR), thermal capacitance and thermal conduction through legs. Radiation thermal conductance between bolometer membrane and its surrounding is defined based on Stefan-Boltzmann radiation law. Calculations were carried out using an equivalent thermal circuit. Eventually, the Detectivity is obtained as figure of merit, considering temperature fluctuation noise. By this analysis, we achieved a reliable method to estimate the performance of bolometer detector in comparison with experimental cases.