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中文摘要：
通过傅里叶光学理论和透镜成像理论对轴棱锥线 聚焦与凸透镜点聚焦两种成像系统进行分析, 并探讨了它们对成像系统焦深的影响。利用ZEMAX光学设计软件,仿真模拟出系统在不同轴 向距离的截面 光强分布图。以蓝光LED为光源,对这两种成像系统进行实验验证,拍摄不同轴向距离处的 截面光强分布 图。结果表明,轴棱锥所具有的线聚焦特性,能将光线连续地会聚到沿轴线不同位置上,图 像的清晰度高, 且在最大无衍射距离内无需调焦,具有更大的焦深；理论分析、仿真模拟与实验结果相吻合 。
英文摘要：
The axicon line focusing and convex lens imaging systems are analyzed and the effect on their imaging system＇s focal depth is explored via the Fourier optics theory and the lens imaging theory. The optical design software of ZEMAX is used to stimulate the cross-section optical intensity distributions of the system at different axial distances. Taking the blue LED as the light source in the experiment, these two imaging systems are verified and the cross-section optical intensity distributions at different axial distance are photographed. Results show that the line focusing characteristics of axicon can focus light continuously to the points along the axis, and that the resolution of images is higher. It is no need to ad- just focus within the maximum non-distraction distance, and the focal depth is larger. The theretical anal- ysis, numerical simulation and experimental results are consistent.
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