We have investigated the utility of a Lau phase interferometer with circular gratings and a white-light source to measure the temperature and temperature profile of an axisymmetric flame. The temperature measured with a Lau phase interferometer is in good agreement with the temperature measured with a thermocouple and multilogger. Detailed theoretical analysis and experimental investigation are presented.
© 2002 Optical Society of America
(050.2770) Diffraction and gratings : Gratings
(110.6760) Imaging systems : Talbot and self-imaging effects
(120.6780) Instrumentation, measurement, and metrology : Temperature
(290.3030) Scattering : Index measurements
Madhuri Thakur, A. L. Vyas, and Chandra Shakher, "Measurement of Temperature Profile of a Gaseous Flame with a Lau Phase Interferometer that has Circular Gratings," Appl. Opt. 41, 654-657 (2002)