3D Imaging with Double-Helix Point Spread Function and Dynamic Aberration Correction Using a Deformable Mirror

Research output: Contribution to journalResearch articleContributedpeer-review



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.


Original languageEnglish
Article number107044
Number of pages11
JournalOptics and lasers in engineering
Publication statusPublished - Jul 2022

External IDs

unpaywall 10.1016/j.optlaseng.2022.107044
Mendeley 48206d94-988d-3918-b9e2-28697aa805ce
WOS 000804810800004



  • Aberration Correction, Adaptive Optics, Depth-Resolving Microscopy, Double-Helix Point Spread Function, Flow Measurement, Particle Tracking Velocimetry