Principles and development of spatial filtering velocimetry

As one of the interesting optical techniques for measurements of the velocity, the spatial-filtering method is treated briefly in this review. The basic theory of the method is examined by analyzing the filtering characteristics of a spatial filter using the power spectral density function. The signal analyses are summarized as one of the techniques used in the spatial filtering method. Various configurations of the spatial filtering velocimeter are classified into typical four groups and outlined according to a variety of spatial filters employed in the velocimeters.

[1]  Y. Aizu,et al.  Measurements of flow velocity in a microscopic region using a transmission grating: a practical velocimeter. , 1986, Applied optics.

[2]  A Hayashi,et al.  High-resolution rotation-angle measurement of a cylinder using speckle displacement detection. , 1983, Applied optics.

[3]  D. Tichenor,et al.  Particle size measurements using an optical variable-frequency-grid technique. , 1981, Applied optics.

[4]  Y. Yeh,et al.  Observation of Diffusion Broadening of Rayleigh Scattered Light , 1964 .

[5]  H. Granger,et al.  An optical doppler intravital velocimeter. , 1984, Microvascular research.

[6]  Toshimitsu Asakura,et al.  Dynamic laser speckles and their application to velocity measurements of the diffuse object , 1981 .

[7]  L. Drain.  The Laser Doppler Technique , 1980 .

[8]  M. Hanss,et al.  Transmission grating velocimeter for particles electric mobility measurements , 1984 .

[9]  Y. Kitagawa,et al.  Image velocity sensing using an optical fiber array. , 1982, Applied optics.

[10]  E A Ballik,et al.  Fringe image technique for the measurement of flow velocities. , 1973, Applied optics.

[11]  Y. Yeh,et al.  Localized fluid flow measurements with an He-Ne laser spectrometer , 1964 .

[12]  Experimental calibration of a two-stage prism-grating system for measuring cell velocity. , 1982, Microvascular research.

[13]  Tariq S. Durrani,et al.  Laser Systems in Flow Measurement , 1977 .

[14]  T Asakura,et al.  Measurements of flow velocity in a microscopic region using a transmission grating. , 1983, Applied optics.

[15]  Akira Kobayashi,et al.  Narrow-Band-Pass Optimal Spatial Filter for Measurement , 1969 .

[16]  Y. Aizu,et al.  Measurements of the velocity gradient in a microscopic region using a transmission grating. , 1985, Applied optics.

[17]  J. Ator,et al.  Image velocity sensing by optical correlation. , 1966, Applied optics.

[18]  J. Ator.  Image-Velocity Sensing with Parallel-Slit Reticles* , 1963 .

[19]  D. Slaaf,et al.  A bidirectional optical (BDO) three-stage prism grating system for on-line measurement of red blood cells velocity in microvessels. , 1981, Microvascular research.

[20]  Fiber-optic distance sensor based on speckle velocity detection , 1984 .

[21]  George F. Aroyan,et al.  The Technique of Spatial Filtering , 1959, Proceedings of the IRE.

[22]  A Hayashi,et al.  Fiber-optic sensor for distance and velocity measurements using speckle dynamics. , 1985, Applied optics.

[23]  T Asakura,et al.  Measurements of flow velocity in a microscopic region using a transmission grating: a differential type. , 1985, Applied optics.

[24]  Toshimitsu Asakura,et al.  Measurements of velocity using a lenticular grating , 1986 .

[25]  A. Melling,et al.  Principles and practice of laser-Doppler anemometry , 1976 .

[26]  T Asakura,et al.  Measurements of flow velocity in a microscopic region using a transmission grating: elimination of directional ambiguity. , 1985, Applied optics.

[27]  Yoshiaki Ohkami,et al.  Non-Contact Rotational Speed Measurement and Integrated Spatial Filter Detector , 1979 .

[28]  S Tsutsumi,et al.  Amplitude-modulated reticle constructed by a liquid crystal cell array. , 1981, Applied optics.

[29]  H. Mishina,et al.  A laser Doppler microscope , 1974 .

[30]  M. Gaster.  A new technique for the measurement of low fluid velocities , 1964, Journal of Fluid Mechanics.