本文選題：微透鏡陣列 + 泰伯效應(yīng)　； 參考：《西南大學(xué)》2016年碩士論文

【摘要】：信息化時代,人們不僅需要更多更新的器件去獲取、控制、傳輸信息,而且對信息的獲取速度、信息質(zhì)量、信息的多樣化提出更高的要求。要達到這些目的,需要各種光電器件控制光的行為,例如成像、聚焦、耦合、分束、調(diào)制等行為。微透鏡陣列作為一種重要的微光學(xué)元器件,被應(yīng)用于各種領(lǐng)域,如并行共焦成像系統(tǒng),也是波前測量系統(tǒng)的關(guān)鍵組件。方形孔徑平面微透鏡陣列是一種充分考慮受光面積和填充系數(shù)的光器件,除了具備常規(guī)的聚焦、成像、耦合等功能,對其更深層次光學(xué)特性的挖掘也是研究的重要方面。當(dāng)單色平行光垂直入射到周期性結(jié)構(gòu)的透明物體(如透射光柵)時,將會在沿光軸方向特定距離觀察到周期結(jié)構(gòu)物體的像,這種不用透鏡而僅靠光的衍射就可對周期物體成像的現(xiàn)象,稱為自成像,又稱泰伯效應(yīng)。周期結(jié)構(gòu)的方形孔徑平面微透鏡陣列在單色平行光照射下,在沿光軸傳播方向觀察到了自成像現(xiàn)象,因此本文討論了微透鏡陣列的泰伯效應(yīng)。在研究微透鏡陣列光學(xué)特性的過程中,發(fā)現(xiàn)微透鏡陣列對相應(yīng)微圖形陣列有莫爾顯示效應(yīng),莫爾條紋對細微位移、形變和轉(zhuǎn)動非常敏感,因而常被用于光學(xué)檢測、光學(xué)校準、文檔加密防偽等,對于微透鏡陣列的莫爾顯示效應(yīng)的研究將進一步拓展微透鏡陣列的應(yīng)用領(lǐng)域。本論文的主要研究內(nèi)容如下:1.對方形孔徑微透鏡陣列的泰伯(Talbot)效應(yīng)進行實驗研究,利用傳遞函數(shù)法分析了該陣列的菲涅耳衍射區(qū)的光場復(fù)振幅分布,討論了泰伯像成像的條件。實驗中,在特定位置處可觀察到三種交替出現(xiàn)的清晰成像,實驗測得的成像距離與理論值吻合。選用不同參數(shù)的方形孔徑微透鏡陣列,泰伯子像成像規(guī)律總體不變,當(dāng)中心距大于孔徑邊長且小于兩倍孔徑邊長時泰伯子像像元間出現(xiàn)交疊現(xiàn)象。方形孔徑微透鏡陣列在分數(shù)泰伯平面可觀察到清晰的呈棋盤狀分布的泰伯子像,這將拓展微透鏡陣列的實際應(yīng)用。2.由許多透光圓孔周期性排列組成的點陣與同周期的微圖形構(gòu)成的陣列重疊,發(fā)生相對轉(zhuǎn)動時,莫爾圖案出現(xiàn),該莫爾圖案是微圖形的放大。對于方形孔徑微透鏡陣列也觀察到了相同的莫爾圖案變化現(xiàn)象,我們對產(chǎn)生這種現(xiàn)象的莫爾顯示機理進行探究。
[Abstract]:In the information age, people not only need more updated devices to obtain, control and transmit information, but also put forward higher requirements for the speed, quality and diversification of information. To achieve these goals, various optoelectronic devices are required to control the behavior of light, such as imaging, focusing, coupling, beam splitting, modulation and so on. As an important microoptic component, microlens array has been applied in various fields, such as parallel confocal imaging system, and it is also a key component of wavefront measurement system. Square aperture planar microlens array is a kind of optical device which fully considers the optical area and filling coefficient. In addition to the conventional focusing imaging coupling and other functions mining deeper optical properties is also an important aspect of the research. When a monochromatic parallel light is vertically incident to a transparent object with periodic structure (such as a transmission grating), the image of the periodic structure will be observed at a specific distance along the optical axis. The phenomenon that the periodic object can be imaged by diffraction without a lens is called self-image, also known as the Tyber effect. The phenomenon of self-imaging along the optical axis of the periodic square aperture plane microlens array is observed under monochromatic parallel light irradiation. Therefore, the Tyber effect of the microlens array is discussed in this paper. In the course of studying the optical properties of the microlens array, it is found that the microlens array has moire display effect on the corresponding micrographic array, and moire fringe is very sensitive to the fine displacement, deformation and rotation, so it is often used in optical detection and optical calibration. The research on the moire display effect of the microlens array will further expand the application field of the microlens array. The main contents of this thesis are as follows: 1. The Talboteffect of square aperture microlens array is studied experimentally. The complex amplitude distribution of the Fresnel diffraction region of the array is analyzed by using the transfer function method, and the imaging conditions of the Taib image are discussed. In the experiment, three kinds of clear imaging can be observed alternately at a certain position, and the imaging distance measured by the experiment is in agreement with the theoretical value. Using square aperture microlens array with different parameters, the imaging law of the Taiber sub-image is not changed. When the center distance is larger than the aperture side length and is less than twice the aperture edge length, the overlap phenomenon appears between the Taiber sub-image pixels. The square aperture microlens array can observe the clear table-like distribution of the taiper subimages in the fractional Tyber plane, which will expand the practical application of the microlens array. 2. The lattice composed of periodic arrangement of many transparent circular holes overlaps with the array of micrographs in the same period. When relative rotation occurs, the moire pattern appears and the moire pattern is magnified by the micrograph. The same moire pattern was observed in square aperture microlens array, and the moire display mechanism was investigated.
【學(xué)位授予單位】：西南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TH74;O435

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