Opt Express. 2022 Feb 28;30(5):8317-8329. doi: 10.1364/OE.453555.
Optofluidic microlenses are one of the crucial components in many miniature lab-on-chip systems. However, many optofluidic microlenses are fabricated through complex micromachining and tuned by high-precision actuators. We propose a kind of tunable optofluidic microbubble lens that is made by the fuse-and-blow method with a fiber fusion splicer. The optical focusing properties of the microlens can be tuned by changing the refractive index of the liquid inside. The focal spot size is 2.8 µm and the focal length is 13.7 µm, which are better than those of other tunable optofluidic microlenses. The imaging capability of the optofluidic microbubble lens is demonstrated under a resolution test target and the imaging resolution can reach 1 µm. The results indicate that the optofluidic microbubble lens possesses good focusing properties and imaging capability for many applications, such as cell counting, optical trapping, spatial light coupling, beam shaping and imaging.
光流控微透镜是许多微型芯片实验室系统中的关键组件之一。然而，许多光流控微透镜是通过复杂的微机械加工制造的，并通过高精度执行器进行调节。我们提出了一种基于光纤熔接机的熔吹法制作的可调谐光流控微泡透镜。通过改变内部液体的折射率，可以调节微透镜的光学聚焦性能。微透镜的焦斑尺寸为 2.8 µm，焦距为 13.7 µm，优于其他可调谐光流控微透镜。在分辨率测试目标下演示了光流控微泡透镜的成像能力，成像分辨率可达 1 µm。结果表明，光流控微泡透镜具有良好的聚焦性能和成像能力，可用于细胞计数、光捕获、空间光耦合、光束整形和成像等多种应用。
