Photon correlation methods
Abstract
The photon correlation method is applied to the analysis of laser Doppler flow measurement signals. The procedure involves the digital correlation of count numbers recorded in fixed short time interval over a series of delays. This is performed by using an analog of the hard limiting process known as single clipping. This single clipping procedure is applied to the signal analysis of laminar flow, and to that of turbulent flow both in the Gaussian and non-Gaussian case. The desirability of phase-shifting the fringe pattern is discussed.
- Publication:
-
2nd International Workshop on Laser Velocimetry, Volume 1
- Pub Date:
- 1974
- Bibcode:
- 1974lave....1..271P
- Keywords:
-
- Flow Measurement;
- Laser Doppler Velocimeters;
- Photons;
- Signal Analysis;
- Spectral Correlation;
- Autocorrelation;
- Correlation Detection;
- Diffraction Patterns;
- Laminar Flow;
- Optical Measuring Instruments;
- Phase Shift;
- Turbulent Flow;
- Instrumentation and Photography