1980 Updates in Optical and Thermal Anemometry

  • R. L. Humphrey

Abstract

Lda With Variable Frequency Shift

This paper will discuss various methods of optical and electronic frequency shift as used with a laser doppler anemometer system. Specifically, an opto-electronic system that allows a stable frequency shift variable from 10 KHz to 50 MHz will be covered. The system combines a fixed shift from a Bragg cell and an electronic shift; resulting from the mixing of the detector signal with a variable local oscillator. The advantages of using this system with tracker or counter processing will be explained.

Keywords

Frequency Shift Doppler Frequency Dead Zone Doppler Spectrum Frequency Tracker 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1980

Authors and Affiliations

  • R. L. Humphrey
    • 1
  1. 1.Disa ElectronicsFranklin LakesUSA

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