Fabrication experiments on supersmooth optics for extrasolar planet detection

Details Fabrication experiments on supersmooth optics for extrasolar planet detection Fabrication experiments on supersmooth optics for extrasolar planet detection

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1113...56f&link_type=abstract

IN: Reflective optics II; Proceedings of the Meeting, Orlando, FL, Mar. 27-29, 1989 (A90-39027 17-74). Bellingham, WA, Society o

Physics

Optics

1

Extrasolar Planets, Imaging Techniques, Power Spectra, Coronagraphs, Diffraction Patterns, Hubble Space Telescope, Light Scattering, Mirrors

Scientific paper

The direct detection of extrasolar planets by imaging will require reductions in scattered and diffracted light by factors in excess of 1000 within one arcsecond of a bright source. While diffraction can be reduced by a number of approaches, small angle scatter can only be reduced by controlling midspatial frequency figure errors. The surface requirements are reviewed and their meaning when compared to the data base of existing mirrors is considered. Experiments are discribed that were successful in reducing midspatial frequency figure so that the scatter level was 500 times less than diffraction for a 25-cm spherical mirror.

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