| Summary: | 碩士 === 國立東華大學 === 光電工程學系 === 102 === The research is to establish a floating image projection system using Fresnel lens to reach the effect and layout that can reduce the cost in constructing the system. Because the Fresnel lens is a discontinuous structure, the floating images have bearing on distortion, stray light and dispersion, and these three factors can not only affect the image quality but also cause the user to feel uncomfortable. So the distortion and stray light of floating image system are serious phenomena. In this study, we focus on how to build the image quality measurement system as the theme for research. For the problems of distortion and stray light, we bring up a series of testing methods to make these phenomena into digitization. In order to pick the depth of field for suitable image capture system, we test the curvature of field on the images of floating projection system by using a CCD to collocate the lens machine vision. After image capture mechanism have been established, we conduct the custom-made measurement programming for understanding the stray light and distortion of floating image projection system. In our experiment, we make the precision of stay light measurement up to 0.78% and the precision of distortion measurement up to 0.2%, and make the phenomena of stay light and distortion into digitization. The results show that the stray light and distortion of this floating image projection system are 16.63% and 3.28% respectively. It will be helpful for establishing the database of the floating imaging system using Fresnel lens in the near future. We have used the Kinect sensing method to create the interactive floating image projection system. The click success rate can reach up to 79% on this interactive system. From all above we find that this interactive floating image projection system is a stable system.
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