Keefer D
Appl Opt. 1987 Jan 1;26(1):91-4. doi: 10.1364/AO.26.000091.
A new technique is described in which fluid flow velocity can be determined using the laser-induced fluorescence (LIF) signal produced by a space and time modulated excitation. The modulated excitation is produced by a crossed-beam probe volume similar to those commonly employed in particle-scattering laser Doppler velocimeters (LDV). The technique relies on a flow-induced variation of the visibility and phase of the fluorescence signal that results from the finite lifetime for fluorescence decay of the excited species. A simple, infinite reservoir model is presented to illustrate the technique and to identify the controlling parameters.
本文描述了一种新技术，利用时空调制激发产生的激光诱导荧光（LIF）信号来测定流体流速。调制激发由交叉光束探测体产生，类似于粒子散射激光多普勒测速仪（LDV）中常用的探测体。该技术依赖于激发态物质荧光衰减的有限寿命所导致的荧光信号可见度和相位的流动诱导变化。本文提出了一个简单的无限储液器模型来说明该技术并确定控制参数。
