SPURIOUS FREQUENCY SPECTRA CAUSED BY THE SCATTERED LIGHTS FROM TRANSPARENT CHANNEL WALL IN THE LASER DOPPLER VELOCIMETRY.

Eiji Okada, Haruyuki Minamitani

Research output: Chapter in Book/Report/Conference proceedingChapter

2 Citations (Scopus)

Abstract

Spurious frequency spectra, SFS, in laser Doppler velocimetry, caused by s superposition of the scattered lights from a stationary transparent wall of a thin flow channel with the incident light are discussed and systematically analyzed. The observed SFS as well as the amplitude of SFS changed with the position and aperture size of the receiving optics. They were entirely different from the so-called frequency broadening and the characteristics indicated that the scattered light served as reference beams on the heterodyne detection of the Doppler signals. A theoretical analysis of the SFS, undertaken by using a simple model, is compared with experimental results; both were in good agreement. A rejection method or SFS is also discussed.

Original languageEnglish
Title of host publicationJapanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
Pages941-946
Number of pages6
Volume26
Edition6
Publication statusPublished - 1987 Jun

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Velocity measurement
Lasers
Channel flow
Optics

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Okada, E., & Minamitani, H. (1987). SPURIOUS FREQUENCY SPECTRA CAUSED BY THE SCATTERED LIGHTS FROM TRANSPARENT CHANNEL WALL IN THE LASER DOPPLER VELOCIMETRY. In Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes (6 ed., Vol. 26, pp. 941-946)

SPURIOUS FREQUENCY SPECTRA CAUSED BY THE SCATTERED LIGHTS FROM TRANSPARENT CHANNEL WALL IN THE LASER DOPPLER VELOCIMETRY. / Okada, Eiji; Minamitani, Haruyuki.

Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes. Vol. 26 6. ed. 1987. p. 941-946.

Research output: Chapter in Book/Report/Conference proceedingChapter

Okada, E & Minamitani, H 1987, SPURIOUS FREQUENCY SPECTRA CAUSED BY THE SCATTERED LIGHTS FROM TRANSPARENT CHANNEL WALL IN THE LASER DOPPLER VELOCIMETRY. in Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes. 6 edn, vol. 26, pp. 941-946.
Okada E, Minamitani H. SPURIOUS FREQUENCY SPECTRA CAUSED BY THE SCATTERED LIGHTS FROM TRANSPARENT CHANNEL WALL IN THE LASER DOPPLER VELOCIMETRY. In Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes. 6 ed. Vol. 26. 1987. p. 941-946
Okada, Eiji ; Minamitani, Haruyuki. / SPURIOUS FREQUENCY SPECTRA CAUSED BY THE SCATTERED LIGHTS FROM TRANSPARENT CHANNEL WALL IN THE LASER DOPPLER VELOCIMETRY. Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes. Vol. 26 6. ed. 1987. pp. 941-946
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