偏振干涉術使用在量測旋光效應及葡萄糖濃度; Polarization Interferometer for Measurement of Optical Rotation and Concentration Glucose

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Title:	偏振干涉術使用在量測旋光效應及葡萄糖濃度;Polarization Interferometer for Measurement of Optical Rotation and Concentration Glucose
Authors:	蔡姓賢;Xing-Xian Cai
Contributors:	機械工程研究所
Keywords:	偏振干涉術;旋光效應;葡萄糖濃度量測;旋光量測;Polarization Interferometer;Optical Rotation;C
Date:	2007-03-09
Issue Date:	2009-09-21 11:56:33 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	本論文提出以偏振干涉術之旋光效應及葡萄糖濃度量測系統，我們成功的量測出偏振旋轉角，再經由偏振旋轉角和葡萄糖濃度之關係，取得葡萄糖液體之正確濃度值。在系統中，我們加入適當相位延遲角之相位延遲波片，可使系統量測靈敏度大幅提升。解相位部份，採用偏振片於0°、90°、45°及-45°使訊號呈兩兩正交，最後再經由訊號擷取卡及Labview程式做反正切函數動作，得出偏振旋轉角之相位變化量。此系統最大優點為成本低廉，使用元件皆採用常見之光學元件，如B.S.、偏振片、相位延遲波片、四分之一波片及檢光器。實驗之呂薩加圓長寛比例為26，換算成相位對應偏振旋轉角之斜率為57，系統解析度為0.35。經由實驗結果分析，本系統靈敏度為0.0197 (deg/mg/dl)，偏振旋轉角解析度為3.5×10-4 degree，換算濃度值為1.6×10-2 (mg/dl)。 A polarization interferometer for measurement of optical rotation and concentration glucose system is presented. The thesis focuses on the development and test of a polarization interferometer for measuring optical rotation. The optical rotation angle variation can be detected by measuring the phase difference of two orthogonal circularly polarized waves. By means of placing a phase retarder into polarization interferometer, the measuring resolution of optical rotation and concentration of glucose liquid improved. With this system, the sensitivity is about 0.0197 (deg/mg/dl) when the phase retardation of the phase-variable wave plate is 178 degree. The measurement of optical rotation angle of glucose solution with resolution of 3.5×10-4 degree can be achieved, corresponding to concentration resolution of 1.6×10-2 (mg/dl).
Appears in Collections:	[Graduate Institute of Mechanical Engineering] Electronic Thesis & Dissertation

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