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Applied Optics

Applied Optics


  • Vol. 20, Iss. 23 — Dec. 1, 1981
  • pp: 4110–4123

Reflection suppression by polarization in backscatter LDA measurements near walls and in two-phase flows

J. Gardavský and Rolf Kleine  »View Author Affiliations

Applied Optics, Vol. 20, Issue 23, pp. 4110-4123 (1981)

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A method is proposed and verified by experiments to suppress disturbing reflections in laser Doppler anemometer (LDA) measurements. Disturbing reflections occur in a variety of practical applications of LDA, such as backscatter measurements near walls or in two-phase fluid or particle velocity measurements. The method uses circularly polarized light that changes the handedness when reflected and is quenched by a suitably oriented polarization analyzer. Scattered light, however, is partially transmitted by the analyzer to give undisturbed seeding particle signals. Verification experiments have been performed to demonstrate the method; systems for practical applications are proposed.

© 1981 Optical Society of America

Original Manuscript: December 29, 1981
Published: December 1, 1981

J. Gardavský and Rolf Kleine, "Reflection suppression by polarization in backscatter LDA measurements near walls and in two-phase flows," Appl. Opt. 20, 4110-4123 (1981)

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