本文關鍵詞：帶色散補償?shù)腟agnac干涉儀系統(tǒng)在白光場快照偏振測量中的應用　出處：《合肥工業(yè)大學》2016年碩士論文　論文類型：學位論文

  更多相關文章： 快照偏振 Sagnac干涉儀 白光 Stokes矢量

【摘要】：光譜成像技術集傳統(tǒng)成像和光譜學于一身從目標中獲取空間域光譜信息,這項技術在早些時候主要應用于遙感探測,到目前以廣泛應用于生物醫(yī)學領域,作為生物醫(yī)學的強大分析工具。同時,偏振測量技術也已經(jīng)在遙感監(jiān)測,目標識別,生物醫(yī)學領域有了實際應用。因此,研究利用空間光譜技術來獲取包括線偏振、圓偏振信息在內的各類偏振信息的測量系統(tǒng)具有必要性和迫切性。本文提出一種應用于白光場景下的快照偏振測量技術,此項技術結合Sangac干涉儀原理和空間快照偏振測量方法,解決了在空域中對二維Stokes參數(shù)的測量問題。詳細闡述了帶色散補償Sangac干涉儀的結構原理,通過對其結構的搭建達到了同時測量至少3個偏振分量的目的,解決了多設備同時測得圖像的配準問題。DCPSI結構可以在FPA上獲得包含目標場景偏振信息的二維強度條紋圖,該圖是包括總光強S0、線偏振分量S2、圓偏振分量S3在內的三個斯托克斯(stokes)矢量的二維調制函數(shù)；針對這種條紋圖,采用一種解調方法：使用快速傅里葉變換(FFT)在傅里葉域中對DCPSI的二維強度條紋圖進行頻率空間濾波,并獲取Stokes矢量相關空間域表達式。并且對白光場Sangcac偏振計結構進行了優(yōu)化,研究了其通光效率。實驗結果證明了利用Sangac干涉儀結構可以在白光場景下獲取相關偏振信息,并且不需要進行結構掃秒,避免了由于移動系統(tǒng)光學器件所帶來的不必要誤差。
[Abstract]:Spectral imaging technology combines traditional imaging and spectroscopy technology to acquire spatial spectrum information from target. This technology is mainly applied to remote sensing detection earlier, and is widely used in biomedicine as a powerful tool for biomedical analysis. At the same time, polarization measurement technology has also been applied in the field of remote sensing monitoring, target recognition and biomedicine. Therefore, it is necessary and urgent to study the measurement system of all kinds of polarization information, including linear polarization and circularly polarized information, using spatial spectrum technology. In this paper, a snapshot polarization measurement technology applied to white light scene is proposed. The technology combines the principle of Sangac interferometer and the spatial snapshot polarization measurement method to solve the problem of measuring two-dimensional Stokes parameters in airspace. The structure and principle of the Sangac interferometer with dispersion compensation is expounded in detail. By constructing its structure, at least 3 polarization components can be measured at the same time, and the image registration problem of multi device simultaneous measurement is solved. The DCPSI structure can obtain two-dimensional fringe intensity target scene contains polarization information in FPA, the figure is three Stokes, including the total intensity of S0 linear polarization components S2, S3, circular polarization (Stokes) two-dimensional vector modulation function; the fringe pattern, using a kind of demodulation method: Fast Fourier transform (FFT) in the Fourier domain in the two-dimensional intensity of DCPSI fringe frequency spatial filter, and obtain the Stokes vector space domain expression. The structure of Sangcac polarimeter in white light field is optimized and its luminous efficiency is studied. The experimental results prove that using Sangac interferometer structure, we can get relative polarization information in white light scene, and do not need to scan for structure, which avoids unnecessary errors caused by optical devices in mobile system.
【學位授予單位】：合肥工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TP751

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本文編號：1340916