Abstract

We present a technique to measure velocity, acceleration, and higher order derivatives of motion using periodic and nonperiodic spatial filters. The technique can be applied using a single detector or an array of detectors. In one configuration, the velocity distribution of an object such as a fluid can be measured by imaging the object onto an array of detectors. In another configuration, multiple projections of an object are used to reconstruct a cross-sectional velocity distribution using a tomography algorithm. The advantages and disadvantages of our technique applied to uniform and spatially varying motions are described.

© 2009 Optical Society of America

Spatial filtering velocimetry of objective speckles for measuring out-of-plane motion

M. L. Jakobsen, H. T. Yura, and S. G. Hanson
Appl. Opt. 51(9) 1396-1406 (2012)

Speckle-based three-dimensional velocity measurement using spatial filtering velocimetry

Theis F. Q. Iversen, Michael L. Jakobsen, and Steen G. Hanson
Appl. Opt. 50(11) 1523-1533 (2011)

Speckle and fringe dynamics in imaging-speckle-pattern interferometry for spatial-filtering velocimetry

Michael L. Jakobsen, Theis F. Q. Iversen, Harold T. Yura, and Steen G. Hanson
Appl. Opt. 50(28) 5577-5591 (2011)

Transmission-grating velocimetric technique for common objects

Shu Wing Li and Tadashi Aruga
Appl. Opt. 31(4) 560-567 (1992)

Spatial filtering velocimetry for real-time measurements of speckle dynamics due to out-of-plane motion

Anders Sig Olesen and Michael Linde Jakobsen
Appl. Opt. 55(14) 3858-3865 (2016)