在測量濃度時，一般來說，必須要觸碰溶液本身才能測量。因此，本研究的主要目標是應用光學技術來測量溶液以達到非接觸可測量的研究目標。溶液的旋轉角度可以通過偏振光來測量，並且可以通過計算分析出溶液的濃度。

對於所提出的“快照系統”，為使用兩個不同厚度的雙折射晶體來產生不同的偏振態，在本研究中，穆勒矩陣可以通過頻譜和傅立葉分析知道。然後，經過一些演算法的計算，可以計算出濃度。但由於設備精度的限制，無法測量出實驗所需的精確穆勒矩陣。因此，後續的旋轉角度計算並沒有顯示出正確的趨勢。但是在偏振片的角度測量上有很好的效果。

When measuring the concentration of solution, generally speaking, the solution itself must be contacted to measure. Therefore, the main goal of this research is to apply optic to measure the solution without contact. The rotation angle of the solution can be measured by the polarized light and can be applied to calculate the concentration of the solution by analytical approach.

For the proposed "snapshot system", two birefringent crystals of different thicknesses are used to generate different polarization states. In this study, the Mueller matrix can be obtained through spectrum and Fourier analysis. Then, after some algorithmic calculations, the concentration can be calculated. However, due to the limitation of equipment accuracy, it is impossible to obtain the correct Mueller matrix by experiment. Therefore, the subsequent calculation of the rotation angle did not show the correct trend. Still, there are good results in the angle measurement of the polarizer.

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