The Study On Imaging In The Medium Of Variable Refractive Index

Image has been widely utilized as a way to acquire information directly in late years and has played important roles in every aspect of life. Image quality is the foundation to acquire image information. Image of high quality has some advantages to acquire image information. But the quality of image acquired is not so good, which results in restricting the development of social economy and technology because of the factor of the environments. Some algorithms about general light ray tracing and imaging system have been designed according to the basic principle of geometrical optics. At last, the planar and spatial optics imaging distortion has been researched based on the algorithm. Some researches in this dissertation have been carried out as the following: The formula of direction-cosine applied in refractive light and reflected light in light tracing has been deduced based on the refractive and reflected laws. The applying conditions have been proposed. At last, applicability of the algorithm has been discussed. The practical optical imaging system has been simplified. Two imaging system algorithms have been proposed. The emergent light of image system produced by different lights of the same object has been analyzed. The judgment of searching-least-image-point has been put forward. The principles of light tracing algorithm, image system algorithm and searching-least-image-point algorithm have been analyzed respectively in order to promote the computed precision and speed, the comparison of different algorithm has been obtained. The attention about coding program has emphasized. In addition, the software about optical image system and some functional enhancement have been briefly introduced. The changes of the planar and spatial practical image point and ideal image point have been discussed when the vision field angle, object distance and range of refractive index have changed. Some summarizations have been put forward. Some results have been deduced and given qualitative explain. The planar and spatial images about four kinds of refractive index have been computed, object field image focused on, by the way of point to point mapping. The image aberration has been recognized.