Abstract

The application of holography to the study of burning coal particles in free flight was examined. Resolution to about 3 μm was attained in the combustion zone of a flat flame burner. Both size and velocity of particles up to 75 μm in diameter were measured holographically. Holographic interferometry was also used. Basic combustion events in coal were recorded and are presented here which have not been observed previously. A comparison of images produced by in-line and off-axis holography also resulted from the study.

© 1979 Optical Society of America

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