Translator Disclaimer
Paper
30 January 2003 Reconstructing wave fronts with varying Hartmann rays
Author Affiliations +
Abstract
Following the development of a Hartmann-Shack sensor with a variable pitch, we needed a data analysis method that does not require a priori the locations of the foci of the lenslets. Thus we developed a method for retrieving the wave front from a Hartmann-Shack sensor using a two-dimensional Fourier demodulation technique. Digital demodulation is applied twice on the pattern, along two orthogonal axes. This provides both phase gradient components in real space, smoothed over the extent of the array. If necessary, a Fourier reconstruction can be used to obtain the corresponding wave front from the gradient components. The technique is rather robust to Poisson and white noise and to relatively large deviations of the foci. The method was tested successfully on a mirror with known large aberrations.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yuval Carmon and Erez N. Ribak "Reconstructing wave fronts with varying Hartmann rays", Proc. SPIE 4840, Future Giant Telescopes, (30 January 2003); https://doi.org/10.1117/12.457967
PROCEEDINGS
6 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

AOLI near diffraction limited imaging in the visible on...
Proceedings of SPIE (August 09 2016)
A compact high-throughput imaging EUV/FUV spectrometer
Proceedings of SPIE (February 24 2003)
Pupil geometry and pupil reimaging in telescope arrays
Proceedings of SPIE (August 01 1990)
Model-based wavefront control for CCAT
Proceedings of SPIE (November 10 2011)

Back to Top