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研究生: 汪立尊
Li-Tsun Wang
論文名稱: 光學設計與檢測之應用實例:: 瞬時多波長偏折量測術與雷射雷達光學掃描設計
The Example of Optical Design and Testing: Multi-wavelength Instantaneous Deflectometry and Scanning Laser Lidar Optical System Design
指導教授: 梁肇文
Chao-Wen Liang
口試委員:
學位類別: 碩士
Master
系所名稱: 理學院 - 光電科學與工程學系
Department of Optics and Photonics
論文出版年: 2017
畢業學年度: 105
語文別: 中文
論文頁數: 80
中文關鍵詞: 光學設計瞬時多波長偏折量測術雷射雷達光學掃描設計
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  • 本篇論文總共分兩部分,第一部分為提出一種利用雷射投影機的瞬時彩色光線偏折量測術(deflectometry)量測方式。藉由掃描式雷射投影機,投影出一個由紅綠藍三種圖層組成的彩色圖案到待測鏡面上,並藉由三步相移法及座標的變換,找出經過反射後的光線在觀測面上的橫向像差,再經由兩個方向的橫向像差,重建出波前像差,並利用光學模擬軟體CodeV去驗證此系統準確度,由於此量測系統是一個瞬時量測系統,我們也能利用它去觀察空氣受熱之擾動現象;我們也同時對了此系統的投影機以及CCD相機的性能做了修正,在投影機方面,我們對其伽瑪曲線做了測試及修正;投影機方面,我們對其拜爾濾色鏡對於不同顏色間的干擾做了量化的修正,最後,我們也研究了如何解決投影機伽瑪能力不足的方式,也就是藉由掃描更多條紋,以彌補投影機性能上的不足。
    此論文第二部分為提出了一種創新的雷射雷達設計方式,此設計藉由一組萊斯利稜鏡組(Risley prism pair)來控制雷射光源的指向方向,並經由一個拋物面鏡使被待測物體反射之訊號進入到光偵測器中。在此部分中,我們設計了一組配合此雷達系統的萊斯利稜鏡組,並經由輻射度學計算找出此雷達最大之工作距離,最後,也完成了控制此雷射雷達指向性與萊斯利稜鏡組旋轉角度之間關係的程式。


    There are two parts in this study, in section A, we present a novel three-color quick-testing deflectometry using a scanning laser projector. We use laser projector to project a rainbow like pattern which is composed by red, green, and blue sinusoidal fringe to the mirror we want to test, then the transverse ray aberration is reconstructed by phase shifting and modulating the coordinate. At last, we can reconstruct the wavefront aberration by two orthogonal transverse ray aberration. In this study, we present an instantaneous optical measure system, so we also use it to observe the change of the atmosphere refract index if the atmosphere is heated by fire. We will use CodeV to simulate this testing system for predication. We also test the ability of the projector and CCD camera we use. For projector, we test the gamma curve of the projector and find a way to optimize it. For CCD camera, we test the crosstalk of different color of this CCD, then we use a mathematical way to correct it. At last, we find a solution to correct the problem of projector’s grayscale ability, the answer is that we need to project more fringe to the mirror we want to test, such as N-bucket phase shifting algorithm.
    In section B, we present an advanced laser lidar optical system, we use Risley prism pair to control the direction of diode laser, and then we use an off-axis parabolic mirror to make sure that the laser signal reflected by the object far away will go into the optical sensor. In the section, we design a Risley prism pair for this optical system, and we also calculate the maximum sensing distance of this lidar system. At last, we finish the program of finding the relationship between the direction of laser and the rotation angle of Risley prism pair.

    摘要 I Abstract II 目錄 III 圖目錄 V 表目錄 VVIII Section.A 第一章 緒論 1 1-1 研究背景 1 1-2 研究動機 3 第二章 基礎理論 4 2-1 波前像差與橫向像差 4 2-2 Zernike多項式與波前重建 6 2-3 三步相移 10 2-4 雷射投影機性質介紹 13 2-5 掃描式雷射投影機與波前量測 16 第三章 實驗架構與儀器校正 19 3-1 實驗架構 19 3-2 CCD不同顏色間干擾校正 22 3-3 CCD不同顏色間干擾校正情況 27 3-4 投影機伽馬校正 31 3-5 實驗步驟 33 第四章 實驗數據分析 37 4-1 實驗數據分析 37 4-2 三步相移與多步相移法比較 40 4-3 空氣受熱擾動情形觀測 44 Section.B 第五章 雷射雷達原理介紹 46 5-1 雷射雷達量測原理 49 5-2 雷射雷達光學元件介紹 50 5-3 雷射雷達輻射度學計算 55 第六章 雷射雷達設計 59 6-1 光學元件設計 59 6-2 雷射雷達指向性計算 61 6-3 雷射波長對光學元件之影響 64 第七章 結論 67 參考文獻 69

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