Research on the response model of microbolometer

doi:10.1088/1674-1056/19/10/108702

Abstract There are certain limitations in the application of uncooled focal plane array (FPA) detector due to the lack of an effective response model which reliably transforms the target temperature to analog output voltage. This paper establishes the response model of microbolometer through researching the detection theory of microbolometer and the heat balance equation under the condition of the pulsed voltage bias. In the establishing process, we simplified the heat balance equation to acquire a simple answer. The experimental data show that, in the temperature dynamic range of 30 K, the biggest tolerance between the model data and the experiment data is 0.2 K; while in the temperature dynamic range of 100 K, it is 1 K. This model can reflect the real response of the microbolometer with only small differences which are acceptable in engineering applications.

Keywords: microbolometer detection theory response model capacitive transimpedance amplifier

Received: 24 February 2010
Revised: 22 March 2010
Accepted manuscript online:

PACS:	07.57.Kp	(Bolometers; infrared, submillimeter wave, microwave, and radiowave receivers and detectors)
	84.32.Ff	(Conductors, resistors (including thermistors, varistors, and photoresistors))
	89.20.Kk	(Engineering)

Fund: Project supported by the National Defense Pre-research Fund of China (Grant No. 50405050303), the Natural Science Foundation of Jiangsu Province of China (Grant No. BK2009049).

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Sui Xiu-Bao(隋修宝), Chen Qian(陈钱), Gu Guo-Hua(顾国华) and Liu Ning(刘宁) Research on the response model of microbolometer 2010 Chin. Phys. B 19 108702

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