320 x 240 microbolometer focal plane array for uncooled applications

Thermal conductance of microbolometer has a directly impact on Noise Equivalent Temperature Difference (NETD) and thermal time constant which are the key indicators of uncooled IR detector. It is of great significance to calculate and evaluate thermal conductance. A calculate approach of thermal conductance for uncooled microbolometer detectors is introduced in this paper. Accurate three-dimensional modeling of microbolometer is found by using MEMS analysis software Intellisuite. Dynamic thermal analysis of this model is solved and then thermal time constant can be read from thermal time curve of the analysis mentioned above. Combined with the calculation of thermal capacitance, more precisely thermal conductance value can be reached which is more accurate than theoretical calculations result and meaningful for design and fabrication of the device.

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“…Where, the frame rate is commonly given as 60 fps for high speed applications [6]. Therefore, the time constant should not exceed 8.3msec.…”

Section: Simulation Resultsmentioning

confidence: 99%

The Thermal Conductance Estimation of Uncooled Microbolometer

Chen

Jiang

Zhou

2012

KEM

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show abstract

“…Recently, ferroelectric and microbolometer detector arrays have become commercially available from a number of sources including Raytheon [12], LIRIS [13], Amber Engineering [14], the Santa Barbara Research Center [15] and the ULTRA Consortium [16] consisting of Honeywell, Rockwell, Inframetrics and the New Jersey Institute of Technology. These devices are relatively inexpensive and do not require cooling, making them suitable for boiler applications.…”

Section: Introductionmentioning

confidence: 99%