Using the generalised-optical differentiation wavefront sensor for laser guide star wavefront sensing

Sebastiaan Y. Haffert; Christoph U. Keller; Richard Dekany

doi:10.1117/12.2562610

13 December 2020 Using the generalised-optical differentiation wavefront sensor for laser guide star wavefront sensing

Sebastiaan Y. Haffert, Christoph U. Keller, Richard Dekany

Proceedings Volume 11448, Adaptive Optics Systems VII; 114481T (2020) https://doi.org/10.1117/12.2562610
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

Laser guide stars (LGS) are used in many adaptive optics systems to extend sky coverage. The most common wavefront sensor used in combination with a LGS is a Shack-Hartmann wavefront sensor (SHWFS). The ShackHartmann has a major disadvantage for extended source wavefront sensing because it directly samples the image. In this proceeding we propose to use the generalized-Optical Differentation Wavefront Sensor (g-ODWFS) a wavefront sensor for wavefront sensing of LGS. The g-ODWFS uses only 4 pixels per sub-aperture, has little to no aliasing noise and therefore no spurious low-order errors and has no need for centroid gain calibrations. In this proceeding we show the results of simulations that compare the g-ODWFS with the SHWFS.

Conference Presentation

Citation Download Citation

Sebastiaan Y. Haffert, Christoph U. Keller, and Richard Dekany "Using the generalised-optical differentiation wavefront sensor for laser guide star wavefront sensing", Proc. SPIE 11448, Adaptive Optics Systems VII, 114481T (13 December 2020); https://doi.org/10.1117/12.2562610

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