光子学报, 2018, 47 (7): 0708002, 网络出版: 2018-09-16
贝塞尔光束的互补光束设计与优化
Construction and Optimization of the Complementary Beam of Bessel Beam
无衍射光束 贝塞尔光束 空间光场调控 计算全息 遗传算法 光场再现 Non-diffracting beam Bessel beam Modulation of spatial optical field Computer generated hologram Genetic algorithm Light field reproduction
摘要
提出无衍射贝塞尔光束的互补光束概念.基于惠更斯-菲涅尔原理和光场的相干叠加性, 给出了其频谱的一般形式.利用遗传算法搜索频谱相位分布的最优解, 使得扫描互补光束光片场的强度分布与贝塞尔光片旁瓣强度分布几乎一致, 二者相减可消除旁瓣的影响, 从而获得大视场均匀的理想薄光片.将其应用在光片荧光显微成像中, 可有效去除离焦背景噪声, 提高成像质量.
Abstract
The idea of propagation-invariant Complementary Beam (CB) to Bessel beam was proposed. Based on the Huygens-Fresnel principle and the superposition of coherent light field, the general form of CB′s spectrum is suggested. The phase distribution of complex amplitude spectrum is optimized with the aid of genetic algorithm, in doing so the scanning complementary beam light-sheet enables to approximate the side lobes of Bessel light-sheet to the utmost. Thus, the substraction of two scans can eliminate the influence of the side lobes to produce a large FOV, homogeneous and thin light-sheet. The employment of the complementary beam into light-sheet fluorescence microscopy is a promising method to reduce the background signal as well as enhance the imaging quality.
贾昊, 于湘华, 杨延龙, 周兴, 严绍辉, 刘超, 雷铭, 姚保利. 贝塞尔光束的互补光束设计与优化[J]. 光子学报, 2018, 47(7): 0708002. JIA Hao, YU Xiang-hua, YANG Yan-long, ZHOU Xing, YAN Shao-hui, LIU Chao, LEI Ming, YAO Bao-li. Construction and Optimization of the Complementary Beam of Bessel Beam[J]. ACTA PHOTONICA SINICA, 2018, 47(7): 0708002.