影像前浮式之反射式成像面圓錐型複合全像術

蘇育緯(Yu-Wei Su)

指導教授 ： 鄭益祥

國立中央大學/理學院/照明與顯示科技研究所/碩士(2014年)

摘要

圓錐型複合全像術是於1989年由日本的研究團隊Okada 等人所提出，其過去的圓錐型複合全像術皆是以穿透式全像片的形式展示，而在2012年由鄭益祥教授與郭博裕學長提出了「單步驟反射式成像面圓錐型複合全像術」，率先將圓錐型複合全像片以反射式全像片的形式展示，觀賞者將會看到沉在圓錐內部的三維立體虛像。
在本論文中，我們利用成像面圓錐型複合全像術的概念，帶有物體資訊的物光直接成像至記錄底片上，在拍攝時的參考光光路中加入圓柱透鏡，修正全像片彎折成圓錐曲面時所產生的「像散效應」，藉此增加單一張全像片之可觀賞影像範圍；由於反射式全像片具有高度的波長選擇性，造成觀賞視窗狹小的問題，我們在參考光中加入擴散元件來拓展垂直視窗。全像片拍攝完成後以反射式全像片的方式重建，觀賞者將會看到前浮在圓錐開口端上方的三維立體實像，同時以電腦模擬的方式模擬光線追跡，找到適當的拍攝參數，接著分析觀賞者在不同觀賞距離觀看圓錐型複合全像片，影像上各像點的全像片張數與波長變化，也可以得到重建影像的寬度、高度與厚度的變化。

關鍵字

圓錐型 ； 複合全像術 ； 全像

並列摘要

The conical holographic stereogram was developed in 1989 by Japanese research team led by K. Okada. The displaying type of this kind of hologram belongs to the transmission type. “One-step reflection image-plane conical multiplex holographyˮ was proposed by Prof. Y. S. Cheng and P. Y. Kuo in 2012. This is the first time to display the conical multiplex hologram in the form of reflective hologram. The observer can perceive the 3D virture image generated inside the hologram cone during reconstruction.
In this study, We use the way of image-plane of conical holographic sterogram to image the object information plane into the film. We add cylindrical lenses in the reference beam to compensate for the “astigmatic effectˮ, produced when hologram is curve into a conical surface. As a result, observer can see wider range of the single hologram than before. In order to increase the dimension of the vertical viewing window, we add the diffuser in the reference beam. The observer can perceive the 3D real image generated on the hologram cone during reconstruction. With computer simulation, we analyze the holographic model to simulate the parameter. By the changing values of the hologram number and the wavelength corresponding to the observed image points, we can numerically obtain the width-to-height ratio of the reconstructed image under different observation distances.

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