Use of the fast Fourier transform for calculating the diffraction pattern of large telescope mirrors

Details Use of the fast Fourier transform for calculating the diffraction pattern of large telescope mirrors Use of the fast Fourier transform for calculating the diffraction pattern of large telescope mirrors

Jan 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979crasb.288...61v&link_type=abstract

Academie des Sciences (Paris), Comptes Rendus, Serie B - Sciences Physiques, vol. 288, no. 4, Jan. 29, 1979, p. 61-63. In Frenc

Physics

Diffraction Patterns, Fast Fourier Transformations, Mirrors, Telescopes, Airy Function, Atmospheric Turbulence, Light (Visible Radiation), Polishing, Ultraviolet Microscopy

Scientific paper

A fast Fourier transform program was used to calculate the diffraction spots of the Canada-France-Hawaii and the Pic-du-Midi Observatory mirrors on the basis of Hartmann test results. The latter mirror is shown to be practically diffraction limited in the visible but to give in the ultraviolet an image of speckles with radius of the order of the theoretical Airy spot. The method appears to be particularly well suited for evaluating the quality of mirrors for space telescopes.

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