1Institut de Planétologie et d’Astrophysique de Grenoble, Univ. Grenoble-Alpes CNRS (France) 2Jean Monnet Univ., Saint-Etienne (France) 3Univ. Côte d’Azur, Observatoire de la Côte d’Azur, CNRS, Laboratoire Lagrange (France) 4INAF, Osservatorio di Astrosica e Scienza dello Spazio di Bologna (France)
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Wavefront sensors (WFS) have now become core components in the fields of metrology of optical systems, biomedical optics, or adaptive optics systems for astronomy. However, none of the designs used or proposed so far achieve simultaneously a high spatial resolution at the pupil of the tested optical system and absolute measurement accuracy comparable to those of modern laser-interferometers. This paper presents an improved WFS concept that reaches both previous goals. The device is named Crossed-Sine Phase wavefront Sensor (CSPS) and is based on a fully transparent gradient phase filter located inside a small, compact measurement head. The theoretical principle of the sensor is described in Fourier optics formalism. Numerical simulations confirm that a measurement accuracy of /100 RMS is achievable. The CSPS also offers the advantages of being quasi-achromatic and working on spatially or spectrally extended natural or artificial light sources.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
François Hénault,Yan Feng,Jean-Jacques Correia,Alain Spang, andLaura Schreiber
"Wavefront sensing with PHASONG: the phase gradient analyser", Proc. SPIE 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI, 131007E (26 August 2024); https://doi.org/10.1117/12.3013213
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François Hénault, Yan Feng, Jean-Jacques Correia, Alain Spang, Laura Schreiber, "Wavefront sensing with PHASONG: the phase gradient analyser," Proc. SPIE 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI, 131007E (26 August 2024); https://doi.org/10.1117/12.3013213