Indirect measurement of the intensity of incident light by the light transmission fluctuation method

Abstract

The light transmission fluctuation method is a simple and useful method for in situ and in-line measurement of particle size and concentration. To accomplish the measurement, it is necessary to know the intensity of incident light or background signal $I_0$. However, measuring $I_0$ during in-line applications is hard. In this Letter, an algorithm is proposed to indirectly measure $I_0$ based on the variation of transmitted light signals. Experiments have been carried out to verify the algorithm and the maximum deviation between premeasured $I_0$ and indirectly measured $I_0^{\prime }$ is less than 2.5%.

© 2011 Optical Society of America