Results 11 to 20 of about 2,243,893 (300)
Linearity of the pyramid wavefront sensor
Optics Express, 2006 The pyramid wavefront sensor is very similar to the Fourier knife-edge test, but employs dynamic modulation to quantify the phase derivative. For circular modulation, we compare approximate geometrical optics calculations, more exact diffraction calculations, and experimental results.
Anna, Burvall +3 more
openaire +3 more sources
WISH: wavefront imaging sensor with high resolution
Light: Science & Applications, 2019 Wavefront sensing is the simultaneous measurement of the amplitude and phase of an incoming optical field. Traditional wavefront sensors such as Shack-Hartmann wavefront sensor (SHWFS) suffer from a fundamental tradeoff between spatial resolution and ...
Yicheng Wu, M. Sharma, A. Veeraraghavan
semanticscholar +2 more sources
Non-modulated pyramid wavefront sensor. Use in sensing and correcting atmospheric turbulence [PDF]
Astronomy & Astrophysics, 2023 Context. The diffusion of adaptive optics systems in astronomical instrumentation for large ground-based telescopes is rapidly increasing and the pyramid wavefront sensor is replacing the Shack-Hartmann as the standard solution for single conjugate ...
G. Agapito +4 more
semanticscholar +1 more source
On-sky Reconstruction of Keck Primary Mirror Piston Offsets Using a Zernike Wavefront Sensor [PDF]
Astrophysical Journal, 2022 The next generation of large ground- and space-based optical telescopes will have segmented primary mirrors. Co-phasing the segments requires a sensitive wavefront sensor capable of measuring phase discontinuities.
M. V. van Kooten +5 more
semanticscholar +1 more source
Variation on a Zernike wavefront sensor theme: Optimal use of photons [PDF]
Astronomy & Astrophysics, 2021 Aims. The Zernike wavefront sensor (ZWFS) is a concept belonging to the wide class of Fourier-filtering wavefront sensors (FFWFSs). The ZWFS is known for its extremely high sensitivity and low dynamic range, which makes it a unique sensor for second ...
V. Chambouleyron +8 more
semanticscholar +1 more source
The bright pyramid wavefront sensor [PDF]
Techniques and Instrumentation for Detection of Exoplanets X, 2021 submitted proceedings to SPIE SPIE Optical Engineering + Applications 2021, Techniques and Instrumentation for Detection of Exoplanets ...
Gerard, Benjamin +3 more
openaire +2 more sources
Focal-plane-assisted pyramid wavefront sensor: Enabling frame-by-frame optical gain tracking [PDF]
Astronomy & Astrophysics, 2021 Aims. With its high sensitivity, the pyramid wavefront sensor (PyWFS) is becoming an advantageous sensor for astronomical adaptive optics (AO) systems.
V. Chambouleyron +4 more
semanticscholar +1 more source
On-sky validation of image-based adaptive optics wavefront sensor referencing [PDF]
Astronomy & Astrophysics, 2021 Differentiating between an exoplanet signal and residual speckle noise is a key challenge in high-contrast imaging. Speckles are due to a combination of fast, slow and static wavefront aberrations introduced by atmospheric turbulence and instrument ...
N. Skaf +16 more
semanticscholar +1 more source
Light: Advanced Manufacturing, 2023 The widely used Shack –Hartmann wavefront sensor (SHWFS) is a wavefront measurement system. Its measurement accuracy is limited by the reference wavefront used for calibration and also by various residual errors of the sensor itself. In this study, based
Yi He +5 more
semanticscholar +1 more source
Light: Advanced Manufacturing, 2022 Adaptive optics systems are used to compensate for wavefront distortions introduced by atmospheric turbulence. The distortions are corrected by an adaptable device, normally a deformable mirror.
A. Zepp, S. Gładysz, K. Stein, W. Osten
semanticscholar +1 more source