| Summary: | 碩士 === 國立中央大學 === 光電科學與工程學系 === 103 === The conical holographic stereogram was developed in 1989 by Japanese research team led by K.Okada. They recoded 2D image information belongs to different angles of the original object in a sequence of long, thin and fan-shaped areas of the recoding film. As a result, the reconstructed image will beover laid by many black stripes. It looks like viewing an image through a fence, called the “picket-fence effect”. This problem can be amended by using the image-plane technique. In the previous study, cylindrical lenses were placed in both the object beam and the reference beam to compensate for the “astigmatic effect’’, produced when hologram is curved into a conical surface, in order to avoid deformation of the 3D image. But the this method still can’t produce perfect 3D image.
In the study, we focus on improving one-step reflection image-plane conic multiplex hologram. We come up with three means to improve it. First, increasing the recorded area of the individual hologram so as to increase the amount of 2D information and enlarge the reconstructed 3D image. Second, using ray tracing to redraw the original 2D image information in order to reduce deformation of the reconstructed 3D image. The last point, we set the white-light point source on the axis of hologram cone during reconstruction so that observer around the hologram can simultaneously watch the 3D image. The 3D virtue image is generated and displayed inside the hologram cone. We use computer to simulate the holographic process and the reconstructed 3D images observed at different positions. Using the propose fabrication method, we succeed in adding recorded range of hologram that used ray tracing to redraw information in order to reduce deformation of 3D image during reconstruction and observer can perceive 3D image more conveniently with flashlight on the axis of holographic cone. Finally, we propose some improved methods and the possibility in the future `development
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