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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/71541

    Title: 平面物面拍攝彎折底片面之反射式圓柱型複合全像術
    Authors: 王璽曄;Wang,Si-Ye
    Contributors: 光電科學與工程學系
    Keywords: 平面物面拍攝彎折底片面之反射式圓柱型複合全像術
    Date: 2016-07-25
    Issue Date: 2016-10-13 13:15:29 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 傳統型複合全像術是將二維的物體影像資訊以垂直條紋記錄在全像片上,所以重建時就會有一條一條垂直的暗紋呈現在影像上,此種情形稱之為「柵欄效應」。「柵欄效應」的問題可以由本實驗室先前的研究以成像面的拍攝方式解決。先前實驗室學長姐所提出的成像面圓錐型複合全像術,是在拍攝時在物光系統及參考光系統中加入柱狀透鏡,改善全像片因彎折所產生的「像散效應」(astigmatic effect)。
    ;Conventional multiplex holograms are composed of 2D image information in a sequence of long, thin and fan-shape areas of the recording film. As the result, the reconstructed image will be over 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 are added in the object beam and the reference beam to compensate for the "astigmatic effect", when the hologram is curved into a conical or cylindrical surface.
      In this study, we use the method of image-plane technique of cylindrical holographic stereogram, and we reshape the object information plane by ray-tracing without cylindrical lenses in both of the object and the reference beam. After we found the curved object information plane, we found the curvature approaching flat. Therefore, we replace the curved object plane with LCD and calculate the effect of the lens aperture on the broadening of the image point on the cylindrical surface. We simplify the step in the experiment by bending the film into a cylinder before holographic exposure, and the observer can perceive a 3D real image generated near the axis of the hologram cylinder without astigmatic effect. We use numerical calculation to simulate the holographic process and the reconstructed 3D images observed at different positions.
    Appears in Collections:[光電科學研究所] 博碩士論文

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