Results 261 to 270 of about 2,243,893 (300)
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Improved linear response in a modal wavefront sensor.
Journal of The Optical Society of America A-optics Image Science and Vision, 2019The modal wavefront sensor provides a direct and less computationally intensive way, relative to a zonal wavefront sensor, of estimating the various aberration modes present in a beam of light.
Santanu Konwar, B. Boruah
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x–y curvature wavefront sensor
Optics Letters, 2015In this Letter, we propose a new curvature wavefront sensor based on the principles of optical differentiation. The theoretically modeled setup consists of a diffractive optical mask placed at the intermediate plane of a classical two-lens coherent optical processor. The resulting image is composed of a number of local derivatives of the entrance pupil
Manuel P, Cagigal, Pedro J, Valle
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Tomographic diffractive microscopy with a wavefront sensor
Optics Letters, 2012Tomographic diffractive microscopy is a recent imaging technique that reconstructs quantitatively the three-dimensional permittivity map of a sample with a resolution better than that of conventional wide-field microscopy. Its main drawbacks lie in the complexity of the setup and in the slowness of the image recording as both the amplitude and the ...
Ruan, Y. +10 more
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Improvements to the modal holographic wavefront sensor
Applied Optics, 2016The Zernike coefficients of a light wavefront can be calculated directly by intensity ratios of pairs of spots in the reconstructed image plane of a holographic wavefront sensor (HWFS). However, the response curve of the HWFS heavily depends on the position and size of the detector for each spot and the distortions introduced by other aberrations.
Fanpeng, Kong, Andrew, Lambert
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Absolute calibration of a Shack-Hartmann wavefront sensor for measurements of wavefronts
OPTO, 2019A high-quality flat wave front is usually used to calibrate the Shach-Hartmann wave-front sensors. The article discusses the possibility of calibrating sensors with spherical wave fronts.
A. Nikitin +7 more
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A fast wavefront reconstructor for the nonlinear curvature wavefront sensor
Adaptive Optics Systems VI, 2018The Nonlinear Curvature Wavefront Sensor (nlCWFS), first proposed by Guyon, determines wavefront shape from images of a reference beacon in a number of planes between the pupil and focal plane of a telescope. We describe a new algorithm that rapidly recovers the low-order aberrations accurately enough to allow practical use of the nlCWFS in an adaptive
Michael Hart +2 more
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Wavefront reconstruction using smartphone based wavefront sensors
SPIE Proceedings, 2015Smartphone camera system has the capability of being integrated into powerful field-sensing tools, capturing data and sharing these data with computing servers or cloud experts. The purpose of this work is to implement a wavefront sensor based on the smartphone platform, which has many potential applications in thin-films and bio-related sensing areas.
Zhenyu Yang, Qiwen Zhan
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Study of the Optical Atmospheric Distortions using Wavefront Sensor Data
Russian Physics Journal, 2021P. Kovadlo +4 more
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Investigation on the wavefront stability of wavefront sensors
2008Master of Science (Precision Engineering)
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Effects of the LGS geometry on the Shack-Hartmann wavefront sensor and the Pyramid wavefront sensor
Adaptive Optics Systems IXIn this work we study the effects of the laser guide star (LGS) on the measurements of both the Shack-Hartmann wavefront sensor (SHWFS) and the Pyramid wavefront sensor (PWFS). We started by describing the LGS geometry and the general effects on each wavefront sensor.
Oyarzun, Francisco +5 more
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