Pulsed Light Source Chromaticity Evaluation Studies

With the wide appliance of pulse light source in national economy,the research of its spectrum has been advancing to a new stage. Because of the pulse light source's characteristics,it's no way to measure the spectrum with normal techniques which are used for ordinary light sources. In this paper,we described a system for fast measurement of the spectrum of pulse light source.In this system,we employed a newly developed multi-channel photodetector -CCD (charge coupled devices),as well as a concave holographic diffractive grating,to form multi-channel splitting system of spectrum - polychromator. These all solidified the foundation of the fast measurement subsequently. A set of high speed data collection circuits has been developed,and the software is also programmed for control,collection and analysis,after completing the system. Some methods and theory can be derived from this system for the spectrum measurement of pulse light source.This paper consists of seven chapters. In the first chapter the background of this task is introduced,and the principles of light source measurement are discussed. In the second chapter the elements of CCD are expounded,hi the third chapter the whole construction of measuring system is ascertained. The optical system is designed as well. In the forth chapter the hardware of system is introduced,especially the A/D conversion. In the fifth part,we introduces the software of system,such as parts for control,collection and analysis. In the sixth chapter the system is calibrated. A series of experiments are laid out in succession. The precision and error are ultimately analyzed. In the end,In Chapter Seven we summarize the work what has been done in this dissertation. The shortcoming of the work is pointed out and the further work is looked forward.The experiment results have proved that the measure system is of high accuracy. The research on pulse light source spectrum measurement has reached the anticipated demands.