基于液体透镜自动聚焦显微成像系统设计
Auto-Focus Technique of Microimaging System Based on Liquid Lens
DOI: 10.12677/OE.2018.83018, PDF,    科研立项经费支持
作者: 张子辉*, 王淑荣, 黄 煜：中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室，吉林 长春
关键词: 光学设计；液体透镜；微调焦系统；无运动部件；显微成像；Optical Design； Liquid Lens； Micro Zoom System； No Moving Elements； Microscopic Imaging
摘要: 设计一种新型自动聚焦显微成像系统，该设计在不移动显微镜或像面情况下，利用液体透镜调节显微成像系统筒镜焦距，对物距离焦进行补偿。本文介绍了微流体透镜调焦方法，理论推导出物距与筒镜焦距的关系曲线。通过ZEMAX优化，设计出一套自动聚焦显微成像系统。该系统以数值孔径为0.25的10×无穷远平常消色差显微为物镜，以液体透镜和4片球面透镜为筒镜，空间分辨率达到1.22微米，物距可离焦范围为±0.5 mm。在不同物距离焦情况下，系统光学传递函数在72 lp/mm处均大于0.2。该设计具有结构紧凑、无机械运动部件、反应速度快等特点，大幅降低了光机系统复杂性。
Abstract: A new auto focusing micro imaging system was designed. The liquid lens was used to adjust the focal length of the system’s tube lens to compensate the defocus of the objective distance without moving the microscope or the image plane. This paper introduced the focusing method of the micro fluid lens. The relationship between the objective length and the focal length of the tube lens was deduced. And the auto focusing micro imaging system was designed by ZEMAX optimization. The numerical aperture of the 10× objective lens is equal to 0.25. And the tube lens includes one liquid lens and four lenses. The spatial resolution of the optical system is less than 1.22 μm within the scope of the object distance ±0.5 mm. The system’s modulation transfer function (MTF) of all fields at Nyquist frequency (72 lp/mm) is larger than 0.2. This optical system not only could compensate the distance of the object, but also has the advantages of compact structure, no mechanical moving parts, fast reaction speed etc.
文章引用：张子辉, 王淑荣, 黄煜. 基于液体透镜自动聚焦显微成像系统设计[J]. 光电子, 2018, 8(3): 131-139. https://doi.org/10.12677/OE.2018.83018

参考文献

[1] 卢洋, 鄢志丹, 崔芳芳, 等. 光学显微镜聚焦系统设计[J]. 化工自动化及仪表, 2013, 40(11): 1399-1403.
[2] Wilson, T. (1990) Confocal Microscope. Academic Press, New York.
[3] Pawley, J.B. and Masters, B.R. (2008) Handbook of Biological Confocal Microscopy. Journal of biomedical Optics, 13, 029902. [Google Scholar] [CrossRef] 
[4] Amberg, M., Oeder, A., Sin-zinger, A., et al. (2007) Tuneable Planar Integrated Optical Systems. Optics Express, 15, 10607-10614. [Google Scholar] [CrossRef] 
[5] Li, J., Baird, G., Lin, Y.H., Ren, H., et al. (2005) Refractive-Index Matching between Liquid Crystals and Photopolymers. Society for Information Display, 13, 1017-1026. [Google Scholar] [CrossRef] 
[6] Robert, A.H. and Feenstra, B.J. (2003) Video-Speed Electronic Paper Based on Elec-trowetting. Nature, 25, 383-385.
[7] Ren, H. and Wu, S.T. (2005) Variable-Focus Liquid Lens by Changing Aperture. Applied Physics Letters, 86, 211107. [Google Scholar] [CrossRef] 
[8] Lee, J.-K., Park, K.-W., Lim, G.-B., et al. (2012) Variable-Focus Liquid Lens Based on a Laterally-Integrated Thermopneumatic Actuator. Journal of the Optical Society of Korea, 16, 22-28. [Google Scholar] [CrossRef] 
[9] 许谊, 徐毓娴, 惠梅, 等. 微分相衬干涉显微镜定量测量表面形貌[J]. 光学精密工程, 2001, 3(9): 226-229.
[10] Zhang, W., Li, D. and Guo, X. (2013) Optical Design and Optimization of a Micro Zoom System with Liquid Lenses. Journal of the Optical Society of Korea, 17, 447-453. [Google Scholar] [CrossRef] 
[11] 汪伟, 沈志学. LCTF机载高光谱相机光学系统设计[J]. 光子学报, 2015, 44(7): 0711003.
[12] 卢宝莉, 刘育梁, 王新伟. 基于单相机–双棱镜的小型三维质问获取系统[J]. 光子学报, 2016, 45(7): 0710004.
[13] 高永锋, 张变, 宋光辉, 等. 虹膜识别镜头的光学设计[J]. 激光与光电子进展, 2017(54): 012204.

为你推荐