A laser velocimeter using a random pattern
Abstract
A method is studied for measuring the velocity using a random pattern. The principle of the method is theoretically described on the basis of spatial filtering velocimetry and experimentally confirmed by using two examples of the random pattern: randomly- distributed multiple apertures and a photographic speckle pattern. The results show the usefulness of the method not only for measuring the absolute velocity in any direction but also for evaluating inclusively all the velocity components in various directions.
- Publication:
-
Optics Communications
- Pub Date:
- November 1987
- DOI:
- 10.1016/0030-4018(87)90376-2
- Bibcode:
- 1987OptCo..64..205A
- Keywords:
-
- Laser Doppler Velocimeters;
- Spatial Filtering;
- Speckle Patterns;
- Statistical Distributions;
- Bacteria;
- Biodynamics;
- Helium-Neon Lasers;
- Numerical Analysis;
- Instrumentation and Photography