發(fā)布時間：2018-01-03 02:11

  本文關(guān)鍵詞：空間調(diào)制光譜偏振測量技術(shù)研究　出處：《中國科學(xué)技術(shù)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 偏振 空間調(diào)制 誤差分析 實驗研究

【摘要】：光譜偏振探測技術(shù)是一種融合偏振技術(shù)和光譜技術(shù)的新型遙感探測技術(shù),可以獲取目標(biāo)光學(xué)輻射的偏振度、偏振角、偏振橢率、光譜等多維信息。近些年來,此技術(shù)在天文觀測、目標(biāo)識別以及醫(yī)學(xué)診斷等領(lǐng)域的應(yīng)用得到了快速發(fā)展,研究和發(fā)展光譜偏振探測技術(shù),對遙感探測有重要意義。本論文首先介紹偏振探測技術(shù)的研究背景以及偏振探測技術(shù)的主要應(yīng)用領(lǐng)域,調(diào)研了國內(nèi)外調(diào)制型偏振探測技術(shù)的發(fā)展?fàn)顩r,分析和討論了偏振探測的相關(guān)理論,介紹了利用斯托克斯參量進行偏振測量的原理和幾種常見調(diào)制類型的Stokes參量偏振測量方法,并描述了各自的優(yōu)缺點;然后分析和討論了基于復(fù)合光楔的空間振幅調(diào)制偏振光譜探測技術(shù)的相關(guān)理論,推導(dǎo)了基于單復(fù)合光楔和雙復(fù)合光楔結(jié)構(gòu)下的空間振幅調(diào)制偏振光譜探測技術(shù)的探測原理和測量方程,對雙復(fù)合光楔結(jié)構(gòu)形式進行了分析,篩選出較為理想的光楔結(jié)構(gòu)模型;對空間調(diào)制光譜偏振測量系統(tǒng)中的關(guān)鍵偏振器件誤差進行了研究,分析了關(guān)鍵誤差因子對偏振測量的影響,針對復(fù)合光楔的中心誤差提出了雙光束測量的誤差標(biāo)定方法;最后對空間調(diào)制光譜偏振探測系統(tǒng)展開了實驗研究,對單、雙復(fù)合光楔結(jié)構(gòu)形式進行實驗研究,確定了后續(xù)實驗采用的光楔結(jié)構(gòu)形式;采用窄帶濾光片和光譜定標(biāo)光源相結(jié)合的方式對系統(tǒng)進行光譜定標(biāo)實驗,獲取了分立光譜通道下不同入射偏振態(tài)條件下2D光譜偏振調(diào)制的圖像數(shù)據(jù),對圖像原始數(shù)據(jù)進行解調(diào),解調(diào)得到的偏振度測量精度分別為Q≤2.5%,U≤4.2%,V≤7.1%,解調(diào)結(jié)果與雙復(fù)合光楔延遲器的軸心偏移誤差造成不同參數(shù)之間的串?dāng)_理論分析結(jié)果吻合。
[Abstract]:Spectral polarization detection technology is a new remote sensing technology combining polarization technology and spectral technology. It can obtain the polarization degree, polarization angle, polarization ellipticity, spectrum and other multi-dimensional information of the target optical radiation in recent years. The application of this technique in astronomical observation, target recognition and medical diagnosis has been rapidly developed, and spectral polarization detection technology has been studied and developed. This paper first introduces the research background of polarization detection technology and the main application fields of polarization detection technology, and investigates the development of modulation polarization detection technology at home and abroad. The related theory of polarization detection is analyzed and discussed. The principle of polarization measurement using Stokes parameter and several common modulation methods of polarization measurement of Stokes parameters are introduced. Their advantages and disadvantages are described. Then the theory of spatial amplitude modulation polarization spectrum detection based on composite wedge is analyzed and discussed. The detection principle and measurement equation of the spatial amplitude modulation polarization spectrum detection technique based on the single and double composite wedge structures are derived and the structure forms of the double composite optical wedges are analyzed. The ideal wedge structure model is selected. The key polarization device errors in the spatial modulation spectral polarization measurement system are studied, and the influence of the key error factors on the polarization measurement is analyzed. An error calibration method for double beam measurement is proposed for the center error of composite wedge. Finally, the spatial modulation spectral polarization detection system is studied experimentally, and the structure of single and double composite optical wedges is studied, and the structure of optical wedge used in subsequent experiments is determined. The spectral calibration experiment was carried out by combining narrow band filter and spectral calibration light source. The image data of 2D spectral polarization modulation under different incident polarization state in discrete spectral channel were obtained. The demodulation of the original image data shows that the measurement accuracy of polarization degree is Q 鈮，

本文編號：1371915