方形孔径平面微透镜阵列的成像特性及应用研究

发布时间：2018-03-23 18:11

本文选题：方形孔径平面微透镜阵列　切入点：叠栅条纹　出处：《西南大学》2017年硕士论文

【摘要】：方形孔径平面微透镜阵列是采用光刻离子工艺在特殊玻璃基片上制作的微透镜阵列。这种方法制作的微透镜掩埋在玻璃基片的表面下方,不仅避免了环境温度和湿度的干扰,在光学性能方面也有表现得非常出色。与传统的微透镜阵列相比减小了透镜元之间的间隙,大大提高了填充比率,使得光信息传输得到充分利用。在光通信、光会聚、整形、成像等方面得到了广泛应用。方形孔径平面微透镜阵列与相匹配的微图形阵列叠合会产生叠栅条纹。因此,对方形孔径平面微透镜阵列叠栅条纹形成原理的研究,不仅可以拓展方形孔径平面微透镜阵列的应用范围,也为方形孔径平面微透镜阵列的进一步研究提供理论依据。本文研究了方形孔径平面微透镜阵列对微图形阵列的叠栅条纹的傅里叶原理。方形孔径平面微透镜阵列可视为正交的二维栅格线簇,以一维光栅叠栅条纹形成的傅里叶变换原理为基础,推导了方形孔径平面微透镜阵列二维叠栅条纹的傅里叶理论解析式,对低频(1,-1)级叠栅条纹进行详细讨论。重点对不同夹角下叠栅条纹的周期、放大性和同步性进行研究,并采用不同结构参数的二维栅格模版与微图形阵列进行实验研究,实验值和理论值相吻合,研究结果为方形孔径平面微透镜阵列的应用研究提供理论基础。在研究方形孔径平面微透镜阵列的成像特性时发现,当单色平行光垂直入射到微透镜阵列时,在沿光轴的特定距离观察到与透镜阵列相同的像,这种不用透镜就能对物体成像的现象叫泰伯效应。本文从一维光栅、二维周期物体的泰伯效应出发,分析了方形孔径平面微透镜阵列在菲涅尔衍射区的光场分布,运用传递函数法讨论了成像条件,分别对相移分别为1,-1,±j的三种特殊成像情况进行研究,这将拓展方形孔径平面微透镜阵列的实际应用。在应用方面,研究了微透镜阵列对OLED外部量子效率的影响。在应用新型磷光材料后,OLED的内部量子效率已经接近100%,但仅有约20%的光能出射到空气中,本文根据OLED基底、阳极层、有机发光层和空气的折射率差异导致外部量子效率低,介绍了OLED出光效率低的原因及解决方法,并结合微透镜阵列的特性,讨论不同填充率和不同排列形式对OLED出光效率的影响,并进行数值模拟,得到最优的透镜阵列参数。
[Abstract]:The square aperture planar microlens array is a kind of microlens array fabricated on special glass substrate by photolithography. The microlens made by this method is buried under the surface of the glass substrate, which not only avoids the interference of ambient temperature and humidity. Compared with the traditional microlens array, the gap between lens elements is reduced, the filling ratio is greatly increased, and the optical information transmission is fully utilized. In optical communication, optical convergence, shaping, The array of square aperture plane microlens and matched micrographic array will produce superimposed grid stripes. Therefore, the principle of grid fringe formation of square aperture plane microlens array is studied. It can not only expand the application range of square aperture plane microlens array, It also provides a theoretical basis for the further study of square aperture plane microlens array. In this paper, the Fourier principle of square aperture plane microlens array for stacking grid fringes of micrographic array is studied. The square aperture plane microlens array. Columns can be regarded as orthogonal two-dimensional grid line clusters, Based on the Fourier transform principle of one-dimensional grating grating fringe, the Fourier theory analysis formula of square aperture plane microlens array is derived. In this paper, the low frequency grating fringes are discussed in detail. The period, magnification and synchronicity of the grid fringes at different angles are studied, and the experimental study is carried out by using two-dimensional grid templates and micrographics arrays with different structure parameters. The experimental data are in agreement with the theoretical values. The results provide a theoretical basis for the application of square aperture planar microlens arrays. In the study of the imaging characteristics of square aperture planar microlens arrays, it is found that, When monochromatic parallel light is incident perpendicular to a microlens array, the same image as the lens array is observed at a specific distance along the optical axis. This phenomenon of imaging objects without a lens is called the Tyber effect. The distribution of light field of square aperture plane microlens array in Fresnel diffraction region is analyzed, and the imaging conditions are discussed by using transfer function method. Three kinds of special imaging cases with phase shift of 1 ~ 1, 卤j are studied respectively, which will expand the practical application of square aperture plane microlens array. The effect of microlens array on the external quantum efficiency of OLED is studied. The internal quantum efficiency of OLED is close to 100, but only about 20% of the light energy is emitted into the air. The external quantum efficiency is low due to the difference of refractive index between organic luminescent layer and air. This paper introduces the reason and solution of low light efficiency of OLED, and combines the characteristics of microlens array. The effects of different filling rate and arrangement on the efficiency of OLED are discussed, and the optimal lens array parameters are obtained by numerical simulation.
【学位授予单位】：西南大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN383.1

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