We describe twin-rainbow metrology, a new optical technique used to measure the thickness of thin films in a cylindrical geometry. We also present an application of the technique: measurement of the thickness of a Newtonian fluid draining under gravity. We compare these measurements with fluid mechanics models. (C) 2003 Optical Society of America.
Adler, Charles L.; Lock, James A.; Rafferty, Ian P.; and Hickok, Wayne, "Twin-Rainbow Metrology. I. Measurement of the Thickness of a Thin Liquid Film Draining Under Gravity" (2003). Physics Faculty Publications. 97.
Adler, Charles L., James A. Lock, Ian P. Rafferty, and Wayne Hickok. "Twin-Rainbow Metrology. I. Measurement of the Thickness of a Thin Liquid Film Draining Under Gravity." Applied Optics 42 (2003): 6584-6594.
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