本文選題：超分辨 + 光瞳濾波�。� 參考：《北京理工大學(xué)》2015年碩士論文

【摘要】：本文旨在探索一種大視場(chǎng)局部超分辨成像系統(tǒng)的設(shè)計(jì)理念與方法，該系統(tǒng)的成像特點(diǎn)使其能夠廣泛應(yīng)用于偵查、救援等領(lǐng)域。達(dá)到該目標(biāo)的主要難點(diǎn)在于：如何實(shí)現(xiàn)超分辨，以及如何將超分辨技術(shù)與現(xiàn)有的光學(xué)設(shè)計(jì)方法相結(jié)合。在對(duì)光學(xué)超分辨方法廣泛調(diào)研的基礎(chǔ)上，我們選用應(yīng)用最為廣泛的光瞳濾波技術(shù)作為實(shí)現(xiàn)大視場(chǎng)局部超分辨成像的主要技術(shù)途徑，研究?jī)?nèi)容也主要針對(duì)光瞳濾波技術(shù)展開。 本文的主要研究成果如下： （1）光瞳濾波器的結(jié)構(gòu)設(shè)計(jì)和優(yōu)化 應(yīng)用Toraldo理論，在Matlab中編寫了超分辨光瞳濾波器的優(yōu)化設(shè)計(jì)算法，，從而設(shè)計(jì)得到最優(yōu)的結(jié)構(gòu)參數(shù)（包括各環(huán)帶的半徑及相位透過率）。應(yīng)用該算法，我們成功地設(shè)計(jì)了二段式、三段式、四段式以及連續(xù)分布式的位相型光瞳濾波器。 （2）光學(xué)系統(tǒng)及光瞳濾波器的整體超分辨效果仿真 我們獨(dú)立探索出一種應(yīng)用通用光學(xué)設(shè)計(jì)軟件ZEMAX對(duì)光瞳濾波器進(jìn)行建模仿真的方法。通過在常規(guī)光學(xué)系統(tǒng)的光瞳處引入特殊面形GRID PHASE，可以近似模擬光瞳濾波器對(duì)基底光學(xué)系統(tǒng)的影響，并由系統(tǒng)點(diǎn)擴(kuò)散函數(shù)獲得超分辨的評(píng)價(jià)指標(biāo)量值，實(shí)現(xiàn)了對(duì)帶有光瞳濾波器的光學(xué)系統(tǒng)的整體分析和仿真。 （3）超分辨光學(xué)系統(tǒng)的公差分析 考慮到實(shí)際光瞳濾波器的加工或?qū)嶒?yàn)誤差，創(chuàng)新性地應(yīng)用動(dòng)態(tài)數(shù)據(jù)交換技術(shù)在Matlab與ZEMAX間建立通信，對(duì)其可能產(chǎn)生的偏心、位置公差、位相公差進(jìn)行了分析，并編寫了相應(yīng)的計(jì)算模擬程序。 （4）超分辨實(shí)驗(yàn)樣機(jī)搭建 根據(jù)設(shè)計(jì)的超分辨光學(xué)系統(tǒng)，進(jìn)行了合理的實(shí)驗(yàn)器件選型，完成光學(xué)元件加工、機(jī)械結(jié)構(gòu)設(shè)計(jì)加工，最終在光學(xué)平臺(tái)上實(shí)現(xiàn)了超分辨聚焦實(shí)驗(yàn)和分辨率板實(shí)驗(yàn)，有效驗(yàn)證了超分辨光瞳濾波的技術(shù)方法。 （5）大視場(chǎng)局部超分辨的實(shí)現(xiàn) 受到小凹成像的啟發(fā)，我們創(chuàng)新性提出了機(jī)械掃描和光楔掃描實(shí)現(xiàn)大視場(chǎng)、局部超分辨成像的方案，克服了超分辨光瞳濾波器引起的旁瓣增強(qiáng)的技術(shù)缺陷。
[Abstract]:The purpose of this paper is to explore the design idea and method of a large field of view local super-resolution imaging system, which can be widely used in investigation, rescue and other fields because of its imaging characteristics.The main difficulties to achieve this goal are how to achieve superresolution and how to combine the super-resolution technology with the existing optical design methods.Based on the extensive investigation of optical super-resolution methods, we choose the most widely used pupil filtering technology as the main technical approach to realize local super-resolution imaging in large field of view, and the research content is mainly focused on pupil filtering technology.The main research results of this paper are as follows:Structure Design and Optimization of pupil filterBased on Toraldo theory, an optimal design algorithm of super-resolution pupil filter is developed in Matlab, and the optimal structural parameters (including radius of each ring band and phase transmittance) are obtained.Using this algorithm, we successfully design two-stage, three-segment, four-segment and continuous distributed phase pupil filters.Simulation of whole Super-resolution effect of Optical system and pupil filterWe have independently explored a method of modeling and simulation of pupil filter using general optical design software ZEMAX.By introducing a special plane shape GRID PHASE into the pupil of a conventional optical system, the influence of pupil filter on the substrate optical system can be approximately simulated, and the evaluation index value of super-resolution can be obtained from the point diffusion function of the system.The whole analysis and simulation of optical system with pupil filter are realized.Tolerance Analysis of Super-Resolution Optical systemConsidering the processing or experimental error of practical pupil filter, the communication between Matlab and ZEMAX is established innovatively by using dynamic data exchange technology, and the possible eccentricity, position tolerance and phase tolerance are analyzed.The corresponding computer simulation program is written.Construction of Super-Resolution Experimental prototypeAccording to the design of super-resolution optical system, reasonable experimental device selection is carried out, optical element processing and mechanical structure design and machining are completed. Finally, super-resolution focusing experiment and resolution plate experiment are realized on the optical platform.The method of super-resolution pupil filtering is verified effectively.Realization of local superresolution in large field of viewInspired by the concave imaging, we creatively propose a scheme of mechanical scanning and wedge scanning to realize large field of view and local super-resolution imaging, which overcomes the technical defect of sidelobe enhancement caused by super-resolution pupil filter.
【學(xué)位授予單位】：北京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN713

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本文編號(hào)：1751900