彩色反射式成像面凹面圓柱型複合全像術之光學模擬; Optical simulation of reflection image-plane alcove cylindrical multiplex holography

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/43771

Title:	彩色反射式成像面凹面圓柱型複合全像術之光學模擬;Optical simulation of reflection image-plane alcove cylindrical multiplex holography
Authors:	吳岳翰;Yang-Hain Wu
Contributors:	光電科學研究所
Keywords:	反射式全像術;圓柱型全像術;複合全像術;multiplex holography;cylindrical holography;Reflection holography
Date:	2010-07-29
Issue Date:	2010-12-08 14:20:00 (UTC+8)
Publisher:	國立中央大學
Abstract:	利用反射式全像片具有高度的波長選擇性，以及利用拍攝時兩道光干涉角度來控制光柵的間距，針對藍光(442nm)、綠光(532nm)、紅光(633nm)三個不同波長設計出空間中全像片觀賞狹縫的位置。其中在實驗的部分我們採用四步驟法：首先在光學系統中加入毛玻璃的方法來增加反射式全像片的垂直視角，並且藉著毛玻璃(成像面)與物光光軸夾角的控制得到第四步驟翻拍時所需物光的入射角，接著，用重複曝光的方式將二維影像拍攝在第二號母片上，再變換第二號母片之重建光角度使繞射光彎折成所需的角度，接著，經過多一次翻拍以消除錯誤影像的干擾，在最後一步驟中，拍攝藍光影像時參考波使用「聚焦線段中心」位於全像圓柱軸心上的圓柱發散波，而拍攝綠光影像與紅光影像則是以平行波為參考波，皆為一次翻拍到子片上，最後製作成全彩反射式全像片。拍攝藍光影像時所使用的圓柱波在全像片彎折之後，可以視為全像圓柱軸心上的點光源，並且綠光影像與紅光影像也都以此點光源為重建光源。　「全彩之反射式成像面凹面圓柱型複合全像術」延續「反射式成像面凹面圓柱型複合全像術」的實驗系統架構，並利用繞射理論推算繞射光的方向，藉由電腦模擬計算來分析四個步驟的實驗架構，討論各種參數對重建影像的影響，並探討改良的方法。 Reflection hologram has the property of high wavelength selectivity. In this paper variation of interference angle between object and reference waves are adopted for changing the spacing of grating. Using this property we can design the viewing slits at a fixed location in the space for blue (442nm), green (532nm), red (633nm) light.The proposed experimental procedure consists of four steps : In the first step, a diffuser is added into the optical system to increase the vertical viewing window, and we control the angle between the diffuser and the optical axis of the object wave to achieve the requirement for the incident angle of object wave in the fourth step. Then, all the 2D images retrieved from the master hologram are sequentially recorded onto the second master hologram with a cylindrical reference wave using multiple-exposure procedure. Next, we adopt a collimated wave as the reconstruction reference beam to to control the direction of the image wave from the second master hologram. In the fourth step, all the 2D blue images are recorded on the transfer hologram using a cylindrical reference wave and then all the 2D green and red images are recorded on the transfer hologram using plane reference wave. After bending the transfer hologram into a cylinder, the source line of cylindrical reference wave for hologram recording of the blue image is compressed into a point on the axis of our cylindrical hologram. And the point light source situated at this location also reconstructs waves for green and red images. This thesis extends the four-step process proposed in the thesis entitled “Reflection image-plane alcove cylindrical multiplex holography”. Diffraction theory and computer simulation are used to calculate the direction of the diffracted beam and to obtain the parameters needed for the experimental setup. The characteristics of the reconstructed 3D images and the methods to improve the quality of images are also discussed.
Appears in Collections:	[Graduate Institute of Optics and Photonics] Electronic Thesis & Dissertation

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