Copy editor: 李博
收稿日期: 2024-08-08
网络出版日期: 2024-11-25
基金资助
国家重点研发计划(2021YFF0700303)
国家自然科学基金(62075177)
Three dimensional tomographic microscopy based on large-field optical sectioning structured illumination
Received date: 2024-08-08
Online published: 2024-11-25
提出一种大视场结构照明光切片显微(large-field optical sectioning structured illumination microscopy, LF-OS-SIM)技术,以实现对厚样品的三维层析显微成像。该技术利用一维光栅投影生成条纹结构光场,并结合空间光调制器(spatial light modulator, SLM)对结构光的频谱进行快速相移。与传统的结构照明光切片显微技术相比,LF-OS-SIM的成像视场(field of view,FOV)提升至原有的4.7倍。同时,利用空间光调制器(spatial light modulator,SLM)进行数字相移,获得了20 帧/s的切片速度。利用LF-OS-SIM对硬币、三维分布的荧光小球、生物样品进行了三维层析显微成像,结果发现LS-OS-SIM的成像视场达1 030×780 μm2,轴向层析成像精度达4.0±0.39 μm。由于其大视场、高分辨率和快速切片速度的优势,LS-OS-SIM有望在工业微器件和生物样品的三维成像中得到广泛应用。
温同强 , 陈肖霏 , 温凯 , 郜鹏 . 基于大视场结构光照明的三维层析显微成像技术[J]. 陕西师范大学学报(自然科学版), 2024 , 52(6) : 38 -47 . DOI: 10.15983/j.cnki.jsnu.2024323
This study introduces a technique known as large-field optical sectioning structured illumination microscopy(large-field optical sectioning structured illumination microscopy, LF-OS-SIM) designed for three-dimensional tomographic microscopic imaging of thick specimens. The technique utilizes a one-dimensional grating projection to generate a striped structured light field, in conjunction with a spatial light modulator (spatial light modulator, SLM) for fast phase-shifting of the structured light spectrum. Compared to conventional OS-SIM techniques that are based on SLM/DMD projection, LF-OS-SIM enhances the spatial bandwidth product (spatial bandwidth product, SBP) by 4.7 times. Additionally, digital phase-shifting using the SLM is implemented to achieve a slicing speed of 20 frames per second. The LF-OS-SIM was employed for three-dimensional tomographic microscopic imaging of objects such as coins, three-dimensionally distributed fluorescent beads, and biological specimens. The results indicated that the imaging field of view (FOV) for LS-OS-SIM reached 1 030×780 μm3, with an axial tomographic imaging accuracy of 4.0±0.39 μm. Given its wide field of view, high resolution, and rapid slicing capabilities, LS-OS-SIM is anticipated to be extensively applied in the three dimensional imaging of both industrial microdevices and biological samples.
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