2020/12/03 by Sebastiaan Y. Haffert, Haffert, Sebastiaan Y., Christoph U. Keller +4
Engineering · Physics and Astronomy · #Adaptive optics and wavefront sensing #Advanced Measurement and Metrology Techniques #FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Surface Roughness and Optical Measurements #astro-ph.IM
paper · pdf · doi:10.48550/arxiv.2012.02336
10 pages, 7 figures, submitted to SPIE
arxiv created 2020/12/03 · openalex publication_date 2020/12/03 · arxiv updated 2020/12/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 Shack-Hartmann 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.