Research On Development And Application About Laser Rainbow Measurement System

In many fields, such as industrial processes, atmospheric measurements, environmental testing shape, the quick and precise measurement for concentration, optical properties and size of micro-particle are required. The light scattering method attracts lots of attention on its rapid, accurate, non-contact measurement aspects. In the particle size distribution and refractive index measurement, Rainbow measurement technique is one of the most potential methods. The fine structure of rainbow intensity distribution provides the lots of information for the measurement, inversion of refractive index and parameter size of particle.This thesis designs and develops the measurement system of laser rainbow, gives a design idea of laser rainbow test system, principle, and function and offers the basic requirements of system. Furthermore, the various components of the system is introduced systematically, including various parts of the structure, function. Then, the implementation and debugging are also described in detail. We designed a software for measuring the rainbow intensity angular distribution. The system can realize the measurement for the scope of wide-angle rainbow intensity distribution, and analyze the results. There is a theoretical calculation software embedded in the measurement software to facilitate to analyze the measurement results compared with the theoretical simulation results. Measurement software is stable, powerful, interface optimization and easy to use. The whole system measurement has advantages of high accuracy and sensitivity, high speed repeatability and stability.The rainbow intensity angle distribution of single-mode fiber and graded-index polymer optical fiber is measured and studied by this system, including normal incidence and oblique incidence. The work provides the useful information for inversion of particle sizing and refractive index profile.