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

  更多相關(guān)文章： 快照偏振 Sagnac干涉儀 白光 Stokes矢量

【摘要】：光譜成像技術(shù)集傳統(tǒng)成像和光譜學(xué)于一身從目標(biāo)中獲取空間域光譜信息,這項(xiàng)技術(shù)在早些時候主要應(yīng)用于遙感探測,到目前以廣泛應(yīng)用于生物醫(yī)學(xué)領(lǐng)域,作為生物醫(yī)學(xué)的強(qiáng)大分析工具。同時,偏振測量技術(shù)也已經(jīng)在遙感監(jiān)測,目標(biāo)識別,生物醫(yī)學(xué)領(lǐng)域有了實(shí)際應(yīng)用。因此,研究利用空間光譜技術(shù)來獲取包括線偏振、圓偏振信息在內(nèi)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(yīng)用于白光場景下的快照偏振測量技術(shù),此項(xiàng)技術(shù)結(jié)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(xì)闡述了帶色散補(bǔ)償Sangac干涉儀的結(jié)構(gòu)原理,通過對其結(jié)構(gòu)的搭建達(dá)到了同時測量至少3個偏振分量的目的,解決了多設(shè)備同時測得圖像的配準(zhǔn)問題。DCPSI結(jié)構(gòu)可以在FPA上獲得包含目標(biāo)場景偏振信息的二維強(qiáng)度條紋圖,該圖是包括總光強(qiáng)S0、線偏振分量S2、圓偏振分量S3在內(nèi)的三個斯托克斯(stokes)矢量的二維調(diào)制函數(shù)；針對這種條紋圖,采用一種解調(diào)方法：使用快速傅里葉變換(FFT)在傅里葉域中對DCPSI的二維強(qiáng)度條紋圖進(jìn)行頻率空間濾波,并獲取Stokes矢量相關(guān)空間域表達(dá)式。并且對白光場Sangcac偏振計(jì)結(jié)構(gòu)進(jìn)行了優(yōu)化,研究了其通光效率。實(shí)驗(yàn)結(jié)果證明了利用Sangac干涉儀結(jié)構(gòu)可以在白光場景下獲取相關(guān)偏振信息,并且不需要進(jìn)行結(jié)構(gòu)掃秒,避免了由于移動系統(tǒng)光學(xué)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(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TP751

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本文編號：1340916