Aiming at photoelectric detecting system for solution mass fraction

a method is proposed to improve system detecting sensitivity through multiple reflections.Various parameters which affects detecting sensitivity of system in the optical path are firstly discussed

and theoretical basis for improving sensitivity of the system through multiple reflections in the optical path are analyzed.This method can increase the corners change under same mass fraction and it also improves response sensitivity from increasing depth of the solution pool.System based on this method is built

and it is used for detecting different mass fraction of NaCl solution.The experimental results show that the system based on this method can detect small changes in solution mass fraction.The advantage of this method is that the detecting sensitivity is amplified through multiple reflections and miniaturization system design is achieved.