Proceedings of the Optical Society of Korea Conference (한국광학회:학술대회논문집)
- 1990.02a
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- Pages.34-36
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- 1990
Determination of Flow Direction by Using an Acousto-Optic Effect
광음향 변조효과를 이용한 유체의 방향 결정
Abstract
The flow direction in a glass tube is measured by using a forward scatering dual beam laser Doppler velocimeter with an acousto-optic modulator. We can determine the flow direction by measuring the shifted Doppler frequency which is dependent on the order of modulation of the laser frequency shifting moves only the Doppler signal, enabling complete separation of the Pedestal and Doppler singal.
Keywords