Effect of operating temperature on electrical and thermal properties of microbolometer infrared sensors
MetadataShow full item record
The electrical and thermal parameters of microbolometer infrared sensors play an important role in determining the ultimate sensitivity of detection. This paper describes in detail the effect of varying the operating temperature (80-300 K) on the thermal and electrical properties of microbolometer infrared detectors using Ti resistive sensor elements. In the experiment, two microbolometers with different thermal conductances were employed. The parameters studied include the temperature coefficient of resistance (TCR), thermal conductance and thermal mass (heat capacitance). The measurements show that the heat capacitance increases linearly with operating temperature while the thermal conductance increases linearly at low temperatures ( < 250 K) and then rapidly increases. The rapid increase in thermal conductance at elevated temperatures is mainly due to the radiated heat loss which may limit the performance of micro bolometer sensors at high ambient temperatures.
Showing items related by title, author, creator and subject.
Detection of 3.4 THz radiation from a quantum cascade laser using a microbolometer infrared camera Karunasiri, Gamani; Chamberlain, Danielle; Behnken, Barry N.; Lowe, Michele; Robrish, Peter (SPIE, 2007-05);The THz wavelengths cover the frequency range of 0.1-10 THz or 30-3000 μm wavelength band. Currently, detection of THz radiation is carried out using either antenna-coupled semiconductor detectors or superconducting ...
Qian, Xinbo; Karunasiri, Gamani; Xu, Yong Ping (Elsevier, 2004);A new self-heating cancellation technique for microbolometer is proposed. The cancellation of the self-heating effect is achieved by using its replica generated based on the equivalence between electrical and thermal ...
Smith, Travis R (Monterey, California. Naval Postgraduate School, 1997-12);The thermal control system of a spacecraft is designed to maintain all spacecraft components within their specified operating temperature limits throughout all phases of a spacecraft's mission. In order to verify and aid ...