Dear Da-xiang:

The best paper I've come across regarding the computation and
measurement of noise in microbolometers (fore current and not
voltage-biased microbolometers) is "Apparatus for the study of the IR
multiple-photon resonances of polyatomic molecules via th eoptothermal
technique. II. The superconducting bolometer", in Rev. Sci. Instrum, 61
(5) pp. 1379-1389 (1990).

Good luck. Let me know if you find other good ones.

Thomas

Thomas E. Wilson
Professor of Physics
Marshall University
Science 154
One John Marshall Drive
Huntington, WV  25755-2570

Tel: 304.696.2752
FAX: 304.696.3243