Results 121 to 130 of about 4,053 (141)
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SPIE Proceedings, 2003
The method of reconstruction of wavefront modes such as the Hartmann one is considered. Complete data about modes using magnification of number of measured numerical performances of the image created by each of them, not using magnification of number of the subapertures is offered.
Gennadii Degtyarev +3 more
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The method of reconstruction of wavefront modes such as the Hartmann one is considered. Complete data about modes using magnification of number of measured numerical performances of the image created by each of them, not using magnification of number of the subapertures is offered.
Gennadii Degtyarev +3 more
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Digital pyramid wavefront sensor
Imaging and Applied Optics, 2013We demonstrate the possibility of sensing defocus and a combination of defocus and astigmatism aberrations using a digital pyramid wavefront sensor based on a spatial light modulator which allows easy modulation of the pyramid without the need for moving parts.
Vyas Akondi +3 more
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1998
Abstract The development of adaptive optics has fostered a new generation of wavefront sensors, instruments with speeds and sensitivities that are orders of magnitude greater than anything known before 1970. Compensation for atmospheric turbulence requires the measurement of randomly distorted wavefronts in real time, using only a faint ...
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Abstract The development of adaptive optics has fostered a new generation of wavefront sensors, instruments with speeds and sensitivities that are orders of magnitude greater than anything known before 1970. Compensation for atmospheric turbulence requires the measurement of randomly distorted wavefronts in real time, using only a faint ...
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Hybrid wavefront sensor for the fast detection of wavefront disturbances
Applied Optics, 2012Strongly aberrated wavefronts lead to inaccuracies and nonlinearities in holography-based modal wavefront sensing (HMWS). In this contribution, a low-resolution Shack-Hartmann sensor (LRSHS) is incorporated into HMWS via a compact holographic design to extend the dynamic range of HMWS.
Shihao, Dong +2 more
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Fast holographic wavefront sensor
SPIE Proceedings, 2006In this talk we will present a new zonal wavefront sensor. The device is able to take a single incident beam and diffract it into multiple beams with different focal locations, according to the presence and strength of particular aberrations. The Zernike terms in the beam are simply read out according to the location of the foci on the image plane ...
Peter Dyrud, Geoff Andersen
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CMOS integrated wavefront sensor
2001We report on a CMOS implementation of an integrated Hartmann wavefront sensor (WFS) formed by an array of 8×8 addressable quad-cells with an analog demultiplexor and sampling-rate controller integrated on-chip.
Davies W. de Lima Monteiro +2 more
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Wavefront reconstruction for the Shack-Hartmann wavefront sensor
SPIE Proceedings, 2002The Shack-Hartmann wavefront sensor is a powerful tool for optical analysis. A vital step in the data analysis chain involves reconstructing the wavefront incident upon the lenslet array from hundreds or thousands of slope measurements. We discuss here the basics of reconstruction and the differences in reconstruction for the case of Hartmann and Shack-
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