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Selection of Multiple Optimal Absorption Transitions for Nonuniform Temperature Sensing

Volume 64, Number 11 (Nov. 2010) Page 1274-1282

LIN MA,* XUESONG LI, WEIWEI CAI, SUKESH ROY, JAMES R. GORD, and SCOTT T. SANDERS


A crucial aspect in the design of sensors based on absorption spectroscopy involves selecting the optimal transitions. Therefore, the goal of this paper is to develop a method of selecting multiple optimal transitions for the measurement of nonuniform temperature distributions based on absorption spectroscopy. Previously developed methods are largely restricted to the relatively simple case of selecting two transitions for uniform distributions. Our new method addresses the restrictions of previous methods and is applicable to more general cases. The method was validated using both numerical tests and experimental results and is expected to be useful in the design of sensors based on multispectral absorption spectroscopy.

Index Headings: Absorption spectroscopy; Multispectral thermometry; Hyperspectral tomography; Nonuniform temperature sensing.