3D Imaging with Double-Helix Point Spread Function and Dynamic Aberration Correction Using a Deformable Mirror
3D Imaging with Double-Helix Point Spread Function and Dynamic Aberration Correction Using a Deformable Mirror
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DOI：
10.1016/j.optlaseng.2022.107044
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发表时间：
2022-03-23
影响因子：
4.6
通讯作者：
Buettner, Lars
中科院分区：
文献类型：
--
作者：
Bilsing, Clemens;Radner, Hannes;Buettner, Lars
通过波动相边界（例如自由水表面或液滴）的基于成像的测量通常具有较高的不确定性，这是由于边界处光的折射变化。本文提出了一种新颖的测量系统，既可以用一台摄像机进行三维成像，又可以对光在一个边界上的传播进行像差校正。3D成像是通过引入双受阻点扩散函数（DH-PSF）来实现的。动态引入的相位边界的像差的测量与菲涅耳引导星星（FGS）和校正与变形镜在闭环系统中具有低延迟。测量系统和自适应光学图像校正的特点是通过一个线性致动器和演示测量通过振荡液滴。对于后者，使用自适应光学可以将参考流的不确定性降低58%。该技术有可能测量复杂的三维流动，光学难以访问，而不修改的实验装置。可能的应用是优化燃料电池以减少化石能源的消耗。
Imaging-based measurements through fluctuating phase boundaries such as free water surfaces or droplets have usually a higher uncertainty due to the changing refraction of light at the boundary. In this paper, a novel measurement system is presented for both 3D imaging with only one camera and aberration correction of light propagation through one boundary. 3D imaging is achieved by introducing a Double-Helix Point Spread Function (DH-PSF). The dynamically introduced aberrations of the phase boundary are measured with a Fresnel Guide Star (FGS) and are corrected with a deformable mirror in a closed-loop system with low latency. The measurement system and the adaptive optics image correction were characterized by means of a linear actuator and a demonstration measurement through an oscillating droplet. For the latter, the uncertainty of a reference flow could be lowered by 58 % using adaptive optics. The technique has the potential to measure complex three-dimensional flows that are optically difficult to access without modification of the experimental setup. Possible applications are optimizations of fuel cells for reducing the consumption of fossil energy.