應用於波導式擴增實境裝置之擴瞳成像均勻化技術的研究

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Title:	應用於波導式擴增實境裝置之擴瞳成像均勻化技術的研究
Authors:	蘇奕瑋;Su, Yi-Wei
Contributors:	機械工程學系
Keywords:	微結構;表面浮雕;擴增實境;光波導元件;出瞳擴束;surface relief;augmented reality;optical waveguide elements;exit pupil expander
Date:	2022-07-18
Issue Date:	2022-10-04 12:11:07 (UTC+8)
Publisher:	國立中央大學
Abstract:	擴增實境技術中，波導是目前主要被看好的技術，類眼鏡型式的波導裝置，為降低系統與觀看位置相對變化的影響，常採用出瞳擴束技術將擬擴增的影像複製成二維影像群，以增加瞳孔可接收影像範圍。本研究主要針對一種應用於適用於窄波段的波導式擴增實境裝置之出瞳擴束技術進行研究，我們改善一種可調配表面結構的均勻技術，藉此設計與調配此波導元件之耦出位置的繞射功能微結構之形狀與相關配置，以控制每個被複製的影像的相對均勻度，進而實現將原始影像複製成複數個相對均勻的一維影像陣列之目的；在耦入部分，我們主要設計具分束功能的繞射結構與全反射稜鏡結構，將影像複製成三個並列的影像分別傳導，再經由耦出部分相對應被設計之結構陣列，便可耦出二維的相對均勻之影像陣列。我們使用繞射結構設計軟體，搭配一種簡易的優化概念與程式，分別成功地設計綠光、紅光、藍光特定波長的耦出部分之相對應耦出結構陣列的結構，模擬軟體結果分別為：比較耦出的一維影像陣列的光中心光出射度之均勻度可達到約99%、96%、97%；總出光效率達到64.2%、52.9%、58.7%。另外，此調配表面結構的均勻技術，也被考慮應用於原始影像不均的調校技術上，結果顯示，原本均勻度65.3%之類高斯光束，可被調校成均勻光約82.3%的光束。;In the augmented reality technology, waveguide is the main technology that is currently favored. In order to reduce the influence of the relative change between the system and the viewing position, the optical waveguide device is often used to copy the to-be-augmented image into two parts. Dimensional image group to increase the range of images that can be received by the pupil. This research mainly focuses on an exit pupil beam expansion technology applied to a waveguide augmented reality device suitable for narrow wavelength bands. We improve a uniform technology that can adjust the surface structure, so as to design and adjust the coupling and output of the waveguide element. The shape and relative configuration of the diffraction function microstructure at the position control the relative uniformity of each copied image, thereby realizing the purpose of copying the original image into a plurality of relatively uniform one-dimensional image arrays; in the coupling part, We mainly design the diffraction structure and the total reflection structure with beam splitting function, copy the image into three parallel images and transmit them respectively, and then through the coupling part corresponding to the designed structure array, the two-dimensional image can be coupled out. Relatively uniform image array. We used the diffraction structure design software, with a simple optimization concept and program, to successfully design the structure of the out-coupling structure array corresponding to the out-coupling parts of the specific wavelengths of green light, red light, and blue light, respectively. The simulation software results are as follows: Compared with the out-coupled one-dimensional image array, the uniformity of light center light output can reach about 99%, 96%, and 97%; the total light output efficiency can reach 64.2%, 52.9%, and 58.7%. In addition, the uniform technology of adjusting the surface structure is also considered to be applied to the adjustment technology of the original image unevenness. The results show that a Gaussian beam with a uniformity of 65.3% can be adjusted to a beam with a uniformity of about 82.3%.
Appears in Collections:	[Graduate Institute of Mechanical Engineering] Electronic Thesis & Dissertation

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