光学学报, 2020, 40 (14): 1411003, 网络出版: 2020-07-23
液晶透镜爬山自动对焦算法研究 下载: 1189次
Research on Liquid Crystal Lens Hill Climbing Autofocus Algorithm
成像系统 液晶透镜 光焦度 自动对焦 对焦评价函数 imaging systems liquid crystal lens focal power autofocusing focusing evaluation function
摘要
提出一种液晶透镜爬山自动对焦算法。液晶透镜是一种可电控调焦透镜,具有良好的透镜性能。传统玻璃透镜成像系统中的爬山法自动对焦功能一般需要音圈马达带动透镜使之不断移动来寻找最佳清晰像面位置。而所提算法的自动对焦则是通过改变电压来完成的,整个对焦过程不需要任何的机械移动即可实现大范围对焦,使对焦系统的小型化成为可能。实验结果表明,液晶透镜的对焦性能良好,成像解析度高。
Abstract
In this study, we propose the liquid crystal lens hill climbing autofocus algorithm. The liquid crystal lens is an electronically controlled focusing lens, which exhibits good lens performance. In a traditional glass lens imaging system, the hill climbing autofocus function requires the voice coil motor to continuously move the lens for obtaining the optimal clear image plane position. The autofocus function of the proposed algorithm is obtained by varying the voltage. Thus, the entire large-scale focusing process can be realized without any mechanical movement, miniaturizing the focusing system. The experimental results show that the liquid crystal lens exhibits good focusing performance and high imaging resolution.
兰天成, 兰荣华, 陈晓西, 杜爽, 朱学辉, 张俊瑞, 李其昌, 叶茂. 液晶透镜爬山自动对焦算法研究[J]. 光学学报, 2020, 40(14): 1411003. Tiancheng Lan, Ronghua Lan, Xiaoxi Chen, Shuang Du, Xuehui Zhu, Junrui Zhang, Qichang Li, Mao Ye. Research on Liquid Crystal Lens Hill Climbing Autofocus Algorithm[J]. Acta Optica Sinica, 2020, 40(14): 1411003.