Physics – Optics
Scientific paper
Jul 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7736e..94o&link_type=abstract
Adaptive Optics Systems II. Edited by Ellerbroek, Brent L.; Hart, Michael; Hubin, Norbert; Wizinowich, Peter L. Proceedings o
Physics
Optics
Scientific paper
Adaptive pupil masking can be used to reduce the halo and increase the peak intensity of a point spread function (PSF) using an adaptive pupil mask. Areas of the pupil where the residual wavefront aberrations are large are selected and masked using a spatial light modulator. The technique can be used as a standalone system on a smaller telescope without adaptive optics or in conjunction with an adaptive optics system to further improve the PSF. We find by simulation that for a 1 m telescope and using an 8 × 8 system we can increase the peak intensity by 40 % and reduce the FWHM by 76 % to near the diffraction limit. For an 8 m class telescope with a 16×16 pupil mask and adaptive optics the intensity was found to increase by 23 % and the FWHM reduced from 0.022" to 0.018". We also examine the effects of the adaptive pupil mask on the diffraction limited PSF. The square blocking elements result in a square diffraction pattern superimposed on the standard circular diffraction pattern. The relative strengths of each depend on the fraction of the pupil which is blocked.
Love Gordon D.
Myers Richard M.
Osborn James
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