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 language | English |
|---|---|
| Title of host publication | Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes |
| Pages | 941-946 |
| Number of pages | 6 |
| Volume | 26 |
| Edition | 6 |
| Publication status | Published - 1987 Jun |
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ASJC Scopus subject areas
- Engineering(all)
Cite this
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 proceeding › Chapter
}
TY - CHAP
T1 - SPURIOUS FREQUENCY SPECTRA CAUSED BY THE SCATTERED LIGHTS FROM TRANSPARENT CHANNEL WALL IN THE LASER DOPPLER VELOCIMETRY.
AU - Okada, Eiji
AU - Minamitani, Haruyuki
PY - 1987/6
Y1 - 1987/6
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0023366633&partnerID=8YFLogxK
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M3 - Chapter
AN - SCOPUS:0023366633
VL - 26
SP - 941
EP - 946
BT - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
ER -