本文選題：全息 + 非相干全息��； 參考：《鄭州大學(xué)》2016年碩士論文

【摘要】：全息成像技術(shù)可以記錄物光場(chǎng)的振幅與相位分布,在很多領(lǐng)域有著廣泛的應(yīng)用。非相干全息術(shù)使用非相干光源,克服了激光全息術(shù)相干散斑噪聲嚴(yán)重,對(duì)系統(tǒng)裝置穩(wěn)定性要求較高的缺點(diǎn),拓展了全息成像技術(shù)的應(yīng)用范圍。本論文主要探討基于邁克爾遜干涉儀的非相干同軸數(shù)字全息成像系統(tǒng)。本文首先介紹了非相干光全息成像技術(shù)的發(fā)展歷程與研究現(xiàn)狀,然后詳細(xì)介紹了非相干光全息成像技術(shù)的基本原理,并對(duì)幾種典型的非相干光全息成像系統(tǒng)進(jìn)行了分析。以基于邁克爾遜干涉儀的非相干光全息成像系統(tǒng)為例,探討了該系統(tǒng)點(diǎn)擴(kuò)散函數(shù)的計(jì)算方法,全息圖的記錄原理,數(shù)值再現(xiàn)算法,孿生像與零級(jí)項(xiàng)的消除方法等內(nèi)容。研究了廣義相移數(shù)字全息干涉術(shù)(GPSI)的基本原理,探討了基于衍射光相位場(chǎng)統(tǒng)計(jì)特性的相移量盲取算法在非相干光全息成像系統(tǒng)中的應(yīng)用,結(jié)合三步GPSI算法與四步GPSI算法推導(dǎo)了物光場(chǎng)再現(xiàn)公式。搭建了一種基于邁克爾遜干涉儀的非相干同軸數(shù)字全息成像系統(tǒng),并對(duì)分辨率板、鋼尺進(jìn)行了成像實(shí)驗(yàn)研究,實(shí)驗(yàn)結(jié)果表明:此系統(tǒng)可以實(shí)現(xiàn)全息圖的快速記錄與再現(xiàn),三步GPSI算法與四步GPSI算法應(yīng)用于此系統(tǒng)可以成功消除孿生像與零級(jí)項(xiàng),獲得清晰的重建像。對(duì)標(biāo)準(zhǔn)分辨率板的實(shí)驗(yàn)表明,在橫向放大率為1.6倍時(shí),系統(tǒng)的橫向分辨率可達(dá)45lp/mm。在此基礎(chǔ)上,搭建了一種基于邁克爾遜干涉儀的非相干同軸數(shù)字全息望遠(yuǎn)成像系統(tǒng),并成功對(duì)兩組反射式物體進(jìn)行了望遠(yuǎn)成像實(shí)驗(yàn)。利用重建圖像的對(duì)比度作為判斷函數(shù),對(duì)系統(tǒng)的自動(dòng)聚焦特性及相移誤差校正算法進(jìn)行了研究,實(shí)驗(yàn)發(fā)現(xiàn),此判斷函數(shù)僅適用于噪聲較低的平面物體的數(shù)字自動(dòng)聚焦與相移誤差校正,在所拍攝物體為立體結(jié)構(gòu)或重建圖像噪聲較高時(shí),這種自動(dòng)聚焦方法不適用。
[Abstract]:Holographic imaging technology can record the amplitude and phase distribution of light field, and has been widely used in many fields.Incoherent holography uses incoherent light sources, which overcomes the serious speckle noise of laser holography and requires high stability of system devices, and expands the application scope of holographic imaging technology.This paper mainly discusses the noncoherent coaxial digital holographic imaging system based on Michelson interferometer.This paper first introduces the development and research status of incoherent optical holographic imaging technology, then introduces the basic principle of incoherent optical holographic imaging technology in detail, and analyzes several typical incoherent optical holographic imaging systems.Taking the incoherent optical holographic imaging system based on Michelson interferometer as an example, the calculation method of the point diffusion function, the recording principle of the hologram, the algorithm of numerical reconstruction, the elimination of the twin image and the zero term are discussed.The basic principle of generalized phase-shifted digital holographic interferometry (GPSI) is studied. The application of phase shift blind algorithm based on the statistical characteristics of phase field of diffractive light in incoherent optical holographic imaging system is discussed.Combining three-step GPSI algorithm and four-step GPSI algorithm, the reproducing formula of object light field is derived.A noncoherent coaxial digital holographic imaging system based on Michelson interferometer is set up. The imaging experiments of the resolution plate and the steel ruler are carried out. The experimental results show that the system can record and reproduce the hologram quickly.The application of three-step GPSI algorithm and four-step GPSI algorithm to this system can successfully eliminate the twinning image and zero order term and obtain the clear reconstructed image.The experimental results of the standard resolution plate show that the lateral resolution of the system can reach 45lp / mmm when the transverse magnification is 1.6 times.On this basis, a noncoherent coaxial digital holographic imaging system based on Michelson interferometer is built, and two sets of imaging experiments are successfully carried out.Based on the contrast of reconstructed image as a judgment function, the auto-focusing characteristics and phase-shift error correction algorithm of the system are studied, and the experimental results show that,This judgment function is only suitable for digital autofocus and phase shift error correction of planar objects with low noise. This method is not applicable when the object is stereo structure or the reconstructed image is noisy.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TH744.3;O438.1

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