Li Shaokang, Li Gang, Yang Pengfei, Wang Zhihui, Zhang Pengfei, Zhang Tiancai
Opt Express. 2020 Nov 23;28(24):36122-36130. doi: 10.1364/OE.408945.
We present two sets of versatile high-numerical-apeture objectives suitable for various cold-atom experiments. The objectives are assembled entirely by the commercial on-shelf singlets. The two objectives are initially optimized at working wavelength of 852 nm with a standard 5-mm silica optical flat window. They have numerical apertures of NA=0.55 and NA=0.78, working distances of 23 and 12.8 mm, diffraction-limited fields of view of 98 and 15 μm, and spatial resolutions of 0.94 and 0.67 μm, respectively. These performances are simulated by the ray-tracing software and experimentally confirmed by imaging line patterns and a point-like emitter on a resolution chart. The two objectives can be further reoptimized at any single wavelengths from ultraviolet to near infrared and for various optical flat window with different thickness by only tuning one of lens spacing. The two objectives provide convenient and flexible options to observe and address individual atoms in single atom arrays or optical lattices for various cold-atom experiments.
我们展示了两组适用于各种冷原子实验的通用高数值孔径物镜。这些物镜完全由市售的单透镜组装而成。这两组物镜最初在852nm工作波长下，使用标准的5mm石英光学平板窗口进行了优化。它们的数值孔径分别为NA = 0.55和NA = 0.78，工作距离分别为23mm和12.8mm，衍射极限视场分别为98μm和15μm，空间分辨率分别为0.94μm和0.67μm。这些性能通过光线追迹软件进行了模拟，并通过对线图案和分辨率测试图上的点状发射器进行成像得到了实验证实。通过仅调整透镜间距之一，这两组物镜可以在从紫外到近红外的任何单一波长下，针对不同厚度的各种光学平板窗口进一步重新优化。这两组物镜为各种冷原子实验中观察和操控单原子阵列或光学晶格中的单个原子提供了方便且灵活的选择。
