Results 11 to 20 of about 96,711 (321)

Optimization of Virtual Shack-Hartmann Wavefront Sensing [PDF]

open access: yesSensors, 2021
Virtual Shack–Hartmann wavefront sensing (vSHWS) can flexibly adjust parameters to meet different requirements without changing the system, and it is a promising means for aberration measurement.
Xian Yue   +5 more
doaj   +2 more sources

A demonstration of wavefront sensing and mirror phasing from the image domain [PDF]

open access: bronze, 2014
In astronomy and microscopy, distortions in the wavefront affect the dynamic range of a high contrast imaging system. These aberrations are either imposed by a turbulent medium such as the atmosphere, by static or thermal aberrations in the optical path,
Benjamin Pope   +5 more
openalex   +5 more sources

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

open access: greenarXiv, 2020
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.
Sebastiaan Y. Haffert   +2 more
arxiv   +3 more sources

Differential wavefront sensing and control using radio-frequency optical demodulation [PDF]

open access: gold, 2021
Differential wavefront sensing is an essential technique for optimising the performance of many precision interferometric experiments. Perhaps the most extensive application of this is for alignment sensing using radio-frequency beats measured with quadrant photodiodes.
Daniel D. Brown   +4 more
arxiv   +2 more sources

Underwater Turbulence Detection Using Gated Wavefront Sensing Technique [PDF]

open access: yesSensors, 2018
Laser sensing has been applied in various underwater applications, ranging from underwater detection to laser underwater communications. However, there are several great challenges when profiling underwater turbulence effects.
Ying Bi   +4 more
doaj   +2 more sources

Spexwavepy: an open-source Python package for X-ray wavefront sensing using speckle-based techniques [PDF]

open access: yesJournal of Synchrotron Radiation
In situ wavefront sensing plays a critical role in the delivery of high-quality beams for X-ray experiments. X-ray speckle-based techniques stand out among other in situ techniques for their easy experimental setup and various data acquisition modes ...
Lingfei Hu   +2 more
doaj   +2 more sources

Angle-sensitive pixel design for wavefront sensing [PDF]

open access: greenarXiv, 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.
Guoan Zheng
arxiv   +3 more sources

Experimental wavefront sensing techniques based on deep learning models using a Hartmann-Shack sensor for visual optics applications [PDF]

open access: yesScientific Reports
Wavefront sensing is essential in visual optics for evaluating the optical quality in systems, such as the human visual system, and understanding its impact on visual performance. Although traditional methods like the Hartmann-Shack wavefront sensor (HSS)
Juan Sebastián Ramírez-Quintero   +3 more
doaj   +2 more sources

Shack-Hartmann Wavefront Sensing of Ultrashort Optical Vortices [PDF]

open access: yesSensors, 2021
Light beams carrying Orbital Angular Momentum (OAM), also known as optical vortices (OV), have led to fascinating new developments in fields ranging from quantum communication to novel light–matter interaction aspects. Even though several techniques have
Alok Kumar Pandey   +4 more
doaj   +2 more sources

Integrated coronagraphy and wavefront sensing with the PIAACMC [PDF]

open access: green, 2023
Uncorrected wavefront errors create speckle noise in high-contrast observations at small inner-working angles. These speckles can be sensed and controlled by using coronagraph integrated wavefront sensors. Here, we will present how the Phase Induced Amplitude Apodized Complex Mask Corongraph (PIAACMC) can be integrated with both a Self-Coherent Camera (
Sebastiaan Y. Haffert   +2 more
arxiv   +3 more sources

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