Practical numerical propagation of arbitrary wavefronts through PIAA optics

Details Practical numerical propagation of arbitrary wavefronts through PIAA optics Practical numerical propagation of arbitrary wavefronts through PIAA optics

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7731e.150k&link_type=abstract

Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave. Edited by Oschmann, Jacobus M., Jr.; Clampin

Physics

Optics

1

Scientific paper

The phase-induced amplitude apodization (PIAA) coronagraph utilizes highly aspheric optics to produce a strongly apodized beam without the large loss of light that would result from using a graded transmission mask. The rapid variations in surface curvature at the edge of the PIAA apodizing optic creates large wavefront phase changes that cannot be adequately represented in conventional Fourier-based diffraction propagation algorithms. A rapid technique is required for propagating arbitrarily-aberrated wavefronts through the system. An alternative numerical method has been proposed that combines a high-accuracy algorithm to compute edge diffraction effects with a quick modified angular spectrum propagator that handles wavefront errors. We present the results of applying this method to realistically aberrated wavefronts as compared to more complex and time consuming techniques.

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