Our paper “Cascading optofluidic phase modulators for performance enhancement in refractive adaptive optics” has made it onto the home page of SPIE, the international society for optics and photonics, as a news story: “Adaptive optics with cascading corrective elements”.

“Researchers from the University of Freiburg, Germany, have made a significant advance in AO microscopy through the demonstration of a new AO module comprising two deformable phase plates (DPPs).”

The SPIE homepage, with "Adaptive optics with cascading corrective elements" among the latest news stories.

The article describes the key innovation — two ultra-thin correctors in one beam path, each doing what it does best — like this:

“In this AO configuration, similar to hi-fidelity loudspeakers with separate woofer and tweeter units, one of the optical modulators is optimized for low-spatial frequency aberrations, while the second is used for high-frequency correction.”

Figure from the paper: (a) the optical bench, in which laser light excites fluorescent micro-beads and the return path passes through two cascaded DPPs before the camera; (b) how each DPP flattens part of the distorted wavefront in turn; (c) images of the beads without and with adaptive optics, the corrected one resolving individual beads. Scale bar 20 micrometers.

Original news source: “Adaptive optics with cascading corrective elements” https://spie.org/news/adaptive-optics-with-cascading-corrective-elements

The paper is open access:

Original paper: “Cascading optofluidic phase modulators for performance enhancement in refractive adaptive optics” https://doi.org/10.1117/1.AP.2.6.066005