摘要
提出了一种光学、数字图像处理技术相结合的可扩大光学系统焦深的新型成像技术。利用轴锥镜产生无衍射光,无衍射光束具有中心光斑直径小且传播距离远的特性,将无衍射光理论与技术应用到成像系统中可加大焦深且无需调焦。介绍了大焦深成像系统的基本原理,分析了系统的焦深,建立了大焦深成像系统实验模型,并用图像复原方法对实验图像进行了较好的恢复。实验结果证明采用无衍射光与图像处理技术相结合增大成像系统焦深的方法能使成像系统在较大的范围内有较好的成像质量。
A new imaging method employing optics and image processing technology to extend depth-of-focus is proposed. The non-diffracting beam generated by an axicon has a small central spot diameter and a long non-diffracting distance of transmission, so the depth-of-focus of non-diffracting imaging system can be extended as well focalization is unnecessary. In this paper, the imaging theory of non-diffracting imaging system is explored, the depth-of-focus is analyzed, and the system process is modeled. The experimental images are restored in the image restoration method. Results validate the effect and feasibility of this imaging method.
出处
《光电子技术》
CAS
2008年第2期89-92,共4页
Optoelectronic Technology
基金
国家自然科学基金资助项目(30470489)
关键词
大焦深成像系统
无衍射光
轴锥镜
图像处理
large depth-of-focus imaging system
non-diffracting beam
axicon
image processing
