Dynamic interferometric wavefront sensor for strong turbulence conditions based on polarization imaging sensor

Fabian Helde; Ivo Buske

doi:10.1117/12.2600418

12 September 2021 Dynamic interferometric wavefront sensor for strong turbulence conditions based on polarization imaging sensor

Fabian Helde, Ivo Buske

Author Affiliations +

Proceedings Volume 11860, Environmental Effects on Light Propagation and Adaptive Systems IV; 118600I (2021) https://doi.org/10.1117/12.2600418
Event: SPIE Remote Sensing, 2021, Online Only

Abstract

Adaptive Optics (AO) systems for the compensation of optical turbulence in the atmosphere have been proven to work well within certain boundaries. Under strong turbulence conditions, AO based on conventional gradient wavefront sensors such as the Shack-Hartmann combined with linear least-squares reconstructors have shown to perform poorly due to the occurrence of phase singularities, that inherently cannot be reconstructed by the least-squares method. Directwavefront sensors, measuring phase differences directly rather than the gradient, avoid this problem of reconstruction. The self-referencing point-diffraction interferometer, a concept for direct-wavefront sensing that relies on the principle of spatial filtering to generate a (theoretically) unaberrated reference wave from the incoming aberrated wavefront, was early identified as a strong contender for an advanced wavefront sensor in strong turbulence conditions. Several authors have presented such systems. They make use of either the Fourier-transform method or instantaneous phase-shifted interferograms imaged by a complex optical set-up on a single image sensor. This paper evaluates a dynamic selfreferencing point-diffraction interferometer based on a pixelated polarization filter array imaging sensor for instantaneous spatial phase-shifting, promising a simpler optical set-up than other instantaneous phase-shifting approaches while retaining the advantage of less computational requirement compared with Fourier-transform methods.

Conference Presentation

Citation Download Citation

Fabian Helde and Ivo Buske "Dynamic interferometric wavefront sensor for strong turbulence conditions based on polarization imaging sensor", Proc. SPIE 11860, Environmental Effects on Light Propagation and Adaptive Systems IV, 118600I (12 September 2021); https://doi.org/10.1117/12.2600418

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available