Video-rate remote refocusing through continuous oscillation of a membrane deformable mirror

Video-rate remote refocusing through continuous oscillation of a membrane deformable mirror
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通过膜变形镜的连续振荡进行视频速率远程重新聚焦

DOI:
10.1101/2021.04.27.441576
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发表时间:
2021
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通讯作者:
Wright T
Wright T
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作者:
Wright T

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本文介绍了使用可变形镜(DM)配置快速重新聚焦显微镜采用高数值孔径(NA)物镜。采用Alpao DM97-15膜DM对40×/0.80 NA的水浸物镜在26.3次扫描s -1下,通过- 50-50 μm的离焦范围进行再聚焦。我们在200× 200 μm 2的样品中,在77 μm的离焦范围内,在视场上实现了平均Strehl度量为>.6的成像。我们描述了一种优化程序,其中镜子连续扫描,以避免与所采用的膜DM相关的已知滞后问题。这项工作表明,基于dm的重聚焦系统可以在未来用于光片荧光显微镜,以实现视频速率的体积成像。
This paper presents the use of a deformable mirror (DM) configured to rapidly refocus a microscope employing a high numerical aperture (NA) objective lens. An Alpao DM97-15 membrane DM was used to refocus a 40×/0.80 NA water-immersion objective through a defocus range of− 50–50 μm at 26.3 sweeps s− 1. We achieved imaging with a mean Strehl metric of> 0.6 over a field of view in the sample of 200× 200 μm 2 over a defocus range of 77 μm. We describe an optimisation procedure where the mirror is swept continuously in order to avoid known problems of hysteresis associated with the membrane DM employed. This work demonstrates that a DM-based refocusing system could in the future be used in light-sheet fluorescence microscopes to achieve video-rate volumetric imaging.
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