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Axi-Symmetric Flame Temperature Measurement Using Lensless Fourier Transform Digital Holography

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Abstract

Temperature profile measurement of flames is highly desirable for the dynamic characteristics of flames in understanding the combustion process, designing of furnaces and their safety. Accurate measurement and quantitative monitoring is important in flame temperature measurement and optimization of combustion process. Optical interferometric techniques are very non-invasive, accurate, and reliable. Digital holography is non-invasive, whole field (amplitude as well as phase) imaging technique and possesses greater potential than other optical techniques in measurement for phase objects. Digital holographic interferometry provides non-uniform refractive index distribution with high spatial resolution. In this paper, we have demonstrated the application of lensless Fourier transform digital holographic interferometry (LLFTDHI) for an axi-symmetric flames temperature measurement which utilizes fast and simple algorithm for the reconstruction process.

© 2011 Optical Society of America

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