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Ophthalmic and Physiological Optics, Volume 44, Issue 1, Page 168-176, January 2024.Abstract Purpose Previous transverse and a handful of longitudinal studies have shown that the slope of the static accommodation response/stimulus curve declines as complete presbyopia is approached. Changes in pupillary miosis and ocular spherical aberration (SA) are also evident.
Sotiris Plainis +2 more
wiley +1 more source
Wavefront sensing based on the inverted Hartmann sensor [PDF]
arXiv, 2019 The classic Hartmann test consists of an array of holes to reconstruct the wavefront from the local deviation of each focal spot, and Shack-Hartmann sensor improved that with an array of microlenses. This array of microlenses imposes practical limitations when the wavefront is not into of visible wavelengths, e.g., the fabrication of these. Instead, we
arxiv
Wavefront sensor based on modified Talbot effect [PDF]
, 2015 Wavefront measurements are important in many fields of applied optics such as wavefront control of laser beams, optical diagnostics of the surface, human-eye aberration measurements, etc.
Bichra, Mohamed +2 more
core
Simultaneous quantification of longitudinal and transverse ocular chromatic aberrations with Hartmann–Shack wavefront sensor [PDF]
Journal of Innovative Optical Health Sciences, 2018 A simple method to objectively and simultaneously measure eye’s longitudinal and transverse chromatic aberrations was proposed. A dual-wavelength wavefront measurement system using two Hartmann–Shack wavefront sensors was developed. The wavefronts of the
Yangchun Deng +3 more
doaj +1 more source
Phase sensor for solar adaptive-optics [PDF]
, 2011 Wavefront sensing in solar adaptive-optics is currently done with correlating Shack-Hartmann sensors, although the spatial- and temporal-resolutions of the phase measurements are then limited by the extremely fast computing required to correlate the sensor signals at the frequencies of daytime atmospheric-fluctuations.
arxiv +1 more source
Software support for Shack-Hartmann wavefront sensor [PDF]
, 2011 katedra: MTI; přílohy: CD; rozsah: 59 sCílem této diplomové práce bylo navrhnout a realizovat v prostředí MATLAB programový balík pro měření vlnoplochy Shack-Hartmannovým senzorem, kde se spotdiagram, někdy též označovaný jako hartmanngram snímá pro co ...
Mastík, Jiří
core +1 more source
Thermal analysis and experimental study of end-pumped Nd: YLF laser at 1053 nm
Photonic Sensors, 2017 We have numerically analyzed the thermal effects in Nd: YLF laser rod. The calculations of temperature and stress distributions in the Nd: YLF laser rod was performed with finite element (FE) simulations.
R. M. El-Agmy, N. Al-Hosiny
doaj +1 more source
Wavefront sensing with a brightest pixel selection algorithm
, 2011 Astronomical adaptive optics systems with open-loop deformable mirror control have recently come on-line. In these systems, the deformable mirror surface is not included in the wavefront sensor paths, and so changes made to the deformable mirror are not ...
A. G. Basden +16 more
core +2 more sources
, 2010 Near-diffraction limited imaging and spectroscopy in the visible on large (8-10 meter) class telescopes has proved to be beyond the capabilities of current adaptive optics technologies, even when using laser guide stars.
King, David +4 more
core +1 more source
Optical measurements of phase steps in segmented mirrors - fundamental precision limits
, 2006 Phase steps are an important type of wavefront aberrations generated by large telescopes with segmented mirrors. In a closed-loop correction cycle these phase steps have to be measured with the highest possible precision using natural reference stars ...
Caianiello ER +6 more
core +1 more source