منابع مشابه
Linearity of the pyramid wavefront sensor.
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. We show that both the sinusoidal and the approximate linear relationship between wavefront derivative and wavef...
متن کاملMeasuring Phase Aberrations using a Pyramid Wavefront Sensor
The pyramid wavefront sensor (PWS) was initially proposed by astronomers to measure aberrations introduced by the atmosphere. More recently it has been used to measure aberrations of the human eye, and has been successfully incorporated into an adaptive optics loop to correct those aberrations. The raw sensor signal can be used as feedback to control a wavefront correcting device, or with appro...
متن کاملAdaptive optics for ophthalmic applications using a pyramid wavefront sensor.
A new adaptive optics system for the eye using a pyramid wavefront sensor interfaced in closed-loop with a piezoelectric deformable mirror is presented. Sensing parameters such as CCD integration time, pupil sampling and beam steering amplitude are tested on the bench and in vivo on several volunteers to optimize real-time optical correction. The system allows closed-loop operation at a frame r...
متن کاملCalibration and performance of a pyramid wavefront sensor for the eye
cfm?URI=FiO-2005-FThZ3.[5] Chiesa, S.; Daly, E.; Dainty, J.C.; Chamot, S.R. Adaptive optics system for retinal imaging based on a pyramid wavefront sensor. In Adaptive Optics for Industry and Medicine, Galway, Ireland, June, 2008; Dainty, J.C. Ed;Imperial College Press, 2008; Chapter 4, pp 336–341.[6] Daly, E.M.; Dainty, J.C. Proc. SPIE Opt. Sens. Detect. 2010, 7726, 7760W.[7] D...
متن کاملDifferential wavefront curvature sensor
In this paper, a wavefront curvature sensor is presented. This sensor is based on the measurements of the differentials of wavefront slopes, where the wavefront slope measurements can be achieved by a Shack-Hartmann sensor. A ShackHartmann sensor with three output collimated beams will be introduced with a lenslet array installed in each beam. By shifting two of the Shack-Hartmann grids in the ...
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ژورنال
عنوان ژورنال: Optics Express
سال: 2006
ISSN: 1094-4087
DOI: 10.1364/oe.14.011925