Angle-sensitive pixel design for wavefront sensing [PDF]
arXiv, 2013 Conventional image sensors are only responsive to the intensity variation of the incoming light wave. By encoding the wavefront information into the balanced detection scheme, we demonstrate an image sensor pixel design that is capable to detect both the local intensity and wavefront information simultaneously.
arxiv
Large dynamic range Shack-Hartmann wavefront sensor based on adaptive spot matching
Light: Advanced ManufacturingThe Shack-Hartmann wavefront sensor (SHWS) is widely used for high-speed, precise, and stable wavefront measurements. However, conventional SHWSs encounter a limitation in that the focused spot from each microlens is restricted to a single microlens ...
Jiamiao Yang +5 more
doaj +1 more source
Shack-hartmann wavefront sensor with holographic lenslet array for the aberration measurements in a speckle field [PDF]
, 2008 The application of a Shack-Hartmann sensor with holographic lenslet array to the measurements of wavefront aberrations in a speckle field is offered.
Dan’ko, V.P. +4 more
core
Shack–Hartmann wavefront sensors based on 2D refractive lens arrays and super-resolution multi-contrast X-ray imaging [PDF]
, 2020 Andrey Mikhaylov +6 more
openalex +1 more source
IEEE Photonics Journal, 2017 Solar ground layer adaptive optics (GLAO), containing a large field of view (FOV) wavefront sensor (WFS) and one deformable mirror (DM), can be used to reduce and stabilize the seeing effectively over a wide FOV. As the brain of the GLAO system, the real-
Lin Kong +4 more
doaj +1 more source
Adaptive optics with programmable Fourier-based wavefront sensors: a spatial light modulator approach to the LOOPS testbed [PDF]
arXiv, 2019 Wavefront sensors encode phase information of an incoming wavefront into an intensity pattern that can be measured on a camera. Several kinds of wavefront sensors (WFS) are used in astronomical adaptive optics. Amongst them, Fourier-based wavefront sensors perform a filtering operation on the wavefront in the focal plane. The most well known example of
arxiv
Detection of Micro-Probe Displacement Using a Shack-Hartmann Wavefront Sensor [PDF]
, 2012 Hanno Dierke +2 more
openalex +1 more source
Into nonlinearity and beyond for Zernike-like wavefront sensors [PDF]
Context: Telescopes like the Extremely Large Telescope (ELT) and the Giant Magellan Telescope (GMT) will be used together with extreme adaptive optics (AO) instruments to directly image Earth-like planets. The AO systems will need to perform at the fundamental limit in order to image Earth twins.
arxiv +1 more source
On Phase Unwrapping via Digital Wavefront Sensors [PDF]
arXivIn this paper, we derive a new class of methods for the classic 2D phase unwrapping problem of recovering a phase function from its wrapped form. For this, we consider the wrapped phase as a wavefront aberration in an optical system, and use reconstruction methods for (digital) wavefront sensors for its recovery.
arxiv
RISTRETTO: a comparative performance analysis of the unmodulated Pyramid wavefront sensor and the Zernike wavefront sensor [PDF]
The RISTRETTO instrument, a proposed visible high-contrast, high-resolution spectrograph for the VLT, has the primary science goal of detecting reflected light from nearby exoplanets and characterizing their atmospheres. Specifically, it aims to atmospherically characterize Proxima b, our closest temperate rocky exoplanet, located $37 mas$ from its ...
arxiv +1 more source