一次性多角度漫射光譜量測系統;One-snap multi-angle diffused reflection spectrum measuring system

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/72925

Title:	一次性多角度漫射光譜量測系統;One-snap multi-angle diffused reflection spectrum measuring system
Authors:	陳虹伶;Chen, Hong-Ling
Contributors:	光電科學與工程學系
Keywords:	光譜;漫射;皮膚;spectrum;diffused reflection;skin
Date:	2017-03-17
Issue Date:	2017-05-05 17:16:59 (UTC+8)
Publisher:	國立中央大學
Abstract:	在醫學上非侵入式檢測生物的方式逐漸成為重要的檢測方式，所以光譜的檢測開始被應用在醫學疾病的研究上。而皮膚的病變常因病徵的相似而容易有誤判的狀況，所以我們想透過不同角度的光譜量測來探討是否能由角度與光譜的關係來進行疾病的診斷。為了得到更多的光譜資訊，來達到更精準的判斷，本實驗將研究樣本不同角度的漫射光譜。為了達到這個目的，本實驗將建立一個量測光譜的系統，它可以一次收取不同角度的光譜資訊，並且不用擔心樣本在量測不同角度之光譜資訊的過程中因實驗時間過久而量測失準。首先，使用臺灣青銅金龜當樣本做研究，觀察金龜子的背殼在不同角度的光譜結構。隨著接收到的反射角度越大光譜的峰值會逐漸往短波長移動，。0度對應的顏色是橘黃色而60度對應的顏色是黃綠色。再來研究人類皮膚的光譜資訊，分析不同角度的情況下，皮膚光譜內帶有的黑色素、血紅素以及帶氧血紅素濃度比例，隨接收到的反射角越大，其濃度隨角度變小。再使用另一個分析方法，分析皮膚散射光經過系統的光學量測幾何特性。根據這個方法發現皮膚組織內吸收和散射對反射光譜貢獻程度的差異，以及樣本正負角度範圍的對稱性。 ;The biological detection using non-invasive way in medicine is becoming an important detected method, so spectral detection began to be applied in medical disease research. The pathological changes of human skin are easy to be misjudged owing to that the symptoms are too similar, so we want to use the spectrum at different angles to study the disease diagnosis. In order to obtain more spectral information to achieve more exact judgments, we will research the spectral structure at different angles. To realize this target, we set up a system to measure spectrum, which collects the spectral information of multi-angle in one time, and we do not concern about that it will take too long to measure multi-angle spectral information and causing inaccurate. First of all, we take a Taiwanese bronze scarab as a sample and observe the result of this sample in multi-angle spectral measurement. As the received reflection angle is larger, the peaks of the spectrum gradually move to the short wavelength. 0 degree corresponding to the color is yellow and 60 degree corresponding to the color is green. Next, we research the spectrum information of human skin. In different angles spectrum, we analyze the skin spectrum with melanin, hemoglobin and oxyhemoglobin concentration ratio. As the received reflection angle is larger, the concentration decreases. And then we use another method to analyze the skin scattered light through the system with geometrical characteristics. According to this method, we find the difference in the contribution of absorption and scattering to the reflection spectrum in the skin tissue and the symmetry of the angle in positive and negative.
Appears in Collections:	[Graduate Institute of Optics and Photonics] Electronic Thesis & Dissertation

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