本研究主要目的是設計一種拋棄式之變焦內視鏡，利用雙合透鏡的概念，所設計的鏡頭是由一片塑膠透鏡及一由聚二甲基矽氧烷(Polydimethylsiloxane, PDMS)製成的透鏡共構而成。其變焦原理是利用PDMS受力後的形變致使表面曲率的變化，達到光學變焦的效果。首先利用ANSYS模擬PDMS受力後的變形量及表面曲率變化，再利用Zemax來模擬變形後鏡頭之光學性質，透鏡光學特性之好壞以MTF曲線圖及光線扇形圖(Ray fan plot)作為判斷標準。藉由不停的改變PDMS之初始形狀、厚度、受壓程度來找出較合適的變形曲面，以達到較佳的成像品質。最後，以模擬所得之參數建構出恰當尺寸、形狀的雙合透鏡組，並且進行焦距變化之量測以及成像品質實驗，具體實現拋棄式變焦內視鏡的概念。

The main purpose of this research is to design a disposable zoom endoscope. By using the concept of doublet with a plastic lens and PDMS (Polydimethylsiloxane) lens to reduce chromatic aberration. When controlling the displacement and wall thickness of inner lens barrel, the focal length of the endoscope will be changed. The principle is that inner lens barrel press on PDMS lens, the curvature of PDMS lens can be changed, then focal length will be shorter and field of view will be wider. ANSYS is employed to simulate the deformation of PDMS lens under different displacement and wall thickness of inner lens barrel. Zemax is used to compute the optical properties of various profile of PDMS lens. The comparison of image quality depends on MTF diagram and geometric image analysis. In order to attain excellent image quality, the initial shape of PDMS lens and the displacement and wall thickness of inner lens barrel are changed variously. Then, the suitable parameters of lens which bases on simulation are used in experiment. The experiment establishes that the disposable optical zoom endoscope is workable.

[1]Koichiro Hori, Herbert A. Thaler, Scott E. Hunt, Philip
R. Hunt, "ELECTRONIC ENDOSCOPE WITH ZOOM LENS SYSTEM",
United State Patent 5,582,576, Dec. 10, 1996
[2]Allen R. Howes, Shifang Li, "ENDOSCOPE VIDEO ADAPTER
WITH ZOOM", United State Patent 6,113,533, Sep.5, 2000
[3]Jams K. Guy, "FLEXIBLE LENS", United State Patent
6,542,309 B2, Apr. 1, 2003
[4]趙永清、劉安鴻、李耀榮, "具變焦功能之膠囊內視鏡",中華民國專利
092216923,2004.09.01
[5]黃科志, 康德人, 翁炳國, 郭維武, 吳憲明, 國防部軍備局中山科學研究院,
"可拋棄兩段式內視鏡", 中華民國專利TW200630066
[6]B. M.Wright, "Improvement in or relating to variable
focus lenses", English patent 1,209,234
[7]Nikolas Chronis, "Tunable liquid-filled microlens array
integrated with microfluidic network", Optics Express,
Vol.11, No.19, P.2370-2378(2003)
[8]Ki-Hun Jeong, "Tunable microdoublet lens array", Optics
Express, Vol.12, No.11, P.2494-2500(2004)
[9]S. K. B. H. W. Hendriks, M. A. J. van As, C. A. Renders,
T. W. Tukker, "Variable liquid lenses for electronic
products", presented at ICO20: Optical Design and
Fabrication, 2006.
[10]Hsiharng Yang, Chung-Yao Yang, Mau-Shiun Yeh,
"FABRICATION OF MINIATURIZED VARIABLE-FOCUS LENS USING
LIQUID FILLING TECHNIQUE0", Stresa, Italy, 25-27 April
2007
[11]林志偉, "圓環驅動液體充填式透鏡之設計與製造", 博士, 動力機械工程學
系, 國立清華大學, 2009.06
[12]汪怡欣, "PDMS軟式可調焦鏡片分析與製作", 碩士, 機械工程系國立台灣科
技大學, 2008.07.25
[13]Lilai Tang, Chao Hu, Kang Xie, Chang Cheng and Zhiyong
Liu, "Optimized Design of Capsule Endoscopy Lens Based
on ZEMAX",China, June 2011
[14]孫采筠, "液態透鏡薄膜形狀對光學特性之影響", 碩士, 動力機械工程學
系, 國立清華大學, 2005.06
[15]郭詩坪, "液體充填式透鏡與可饒性感測膜之光學模組之研究", 博士, 動力
機械工程學系, 國立清華大學, 2011.07.20
[16]耿繼業、何建娃, 幾何光學，全華科技圖書股份有限公司
[17]ANSYS代理商-虎門科技股份有限公司
[18]Zemax代理商-光研科學(台灣)有限公司
[19]張朝暉, ANSYS 12.0結構分析工程應用實例解析