臺灣博碩士論文加值系統

在本論文中，根據多波長自成像效應與疊紋干涉術，一種角膜曲率的量測方法被提出。
首先，兩個週期匹配的光柵被應用。利用波長調變，第一個光柵的自成像恰可產生於角膜的前表面。然後，此包含曲率資訊的自成像被反射和投影於第二個光柵上，用以產生疊紋影像。接著，利用LabVIEW和MATLAB軟體，疊紋影像可由CCD自動抓取並做影像處理。實驗條件和疊紋傾角因此可被決定。最後，將實驗參數代入特殊推導的方程式，眼角膜曲光度可被決定。
為了驗證本方法之可行性，一些不鏽鋼鋼珠球和豬的眼角膜被量測。實驗結果與商業角膜曲率計量測之結果具有良好的一致性。量測解析度約為0.1D。
本方法的優點包括：架構簡單、高穩定度、高對比度和低成本。

誌 謝...i
摘 要...iii
Abstract...iv
目 錄...vi
圖目錄...ix
表目錄...xi
第一章 緒論...1
1.1 研究背景與動機...1
1.2 章節簡介...10
第二章 研究原理之探討...11
2.1 前言...11
2.2 眼角膜特性介紹...11
2.3 屈光度的定義...13
2.4 多波長光柵自成像效應...15
2.5 疊紋原理...25
2.6 使用光柵之疊紋與多波長自成像效應之角膜曲率量測原理...29
2.7 小結...29
第三章 鋼珠球與眼角膜曲率之量測...39
3.1 實驗條件...39
3.2 量測結果...41
3.3 實驗結果之討論...44
3.3.1實驗最佳化條件之模擬...44
3.3.1-1 光柵週期p1最佳化條件之模擬...44
3.3.1-2 光柵週期p1與p2的匹配關係最佳化之模擬...48
3.3.1-3 兩光柵夾角θ最佳化之模擬...50
3.3.2 疊紋影像清晰度之判讀...52
3.3.3 疊紋傾角之計算...53
3.3.4 實驗架構之校正...55
3.3.5 誤差分析之探討...57
3.4 小結...62
第四章 結論...63
參考文獻...65
附錄一...67
附錄二...72

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