超高分辨率多色光显微镜,通过具有扩展焦点深度的无色超振荡透镜实现
Wenli Li1,2,3, Pei He1,2,3, Dangyuan Lei4
1Ningbo Institute of Northwestern Polytechnical University, College of Mechanical Engineering, Northwestern Polytechnical University, Xi'an, 710072, China.
Nature communications
|August 22, 2023
概括
研究人员开发了一种新的超振荡镜头 (SOL) 用于多色超分辨率成像. 这种先进的光学设备能够对神经元结构进行详细的3D成像,以提高焦点深度和减少色谱分散.
科学领域:
- 光学和光子学 在光学和光子学.
- 纳米技术纳米技术
- 生物医学成像技术 生物医学成像技术
背景情况:
- 平面超振荡镜头 (SOL) 是用于远场亚波长聚焦的衍射装置.
- 传统的SOL在焦点深度 (DoF),色差分散和斑点大小方面面临限制,这是由于数值孔径的权衡.
- 实现多色子衍射极限成像需要克服这些固有的局限性.
研究的目的:
- 使用多目标遗传算法 (GA) 设计一个非色素双相SOL.
- 为了实现长时间的DoF,定制工作距离 (WD),最大限度地减少主叶片大小,并抑制侧叶片强度.
- 为了实现远场多色超分辨率成像,提高性能和实用性.
主要方法:
- 应用多目标遗传算法 (GA) 来优化SOL设计.
- 制造一个二进制相的SOL.
- 同时多色聚焦的实验验证.
- 将SOL与用于3D成像的商业光显微镜集成.
主要成果:
- 证明了蓝色,绿色和红色光束的同时聚焦.
- 在WD为428μm时,获得了直径为~0.5λ的光学针和DoF>10λ的光学针.
- 成功完成了神经元结构的3D超分辨率多色光成像.
结论:
- 开发的非色彩SOL克服了传统的限制,提供了长时间的DoF和抑制的色彩分散.
- 这项研究提出了用于远场多色超分辨率成像的实用方法.
- SOL为成像系统提供了一种可行的方法,可以最大限度地减少复杂的样品定位和光漂白.
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