Nonstandard representations of aspheric surfaces in a telescope design

Details Nonstandard representations of aspheric surfaces in a telescope design Nonstandard representations of aspheric surfaces in a telescope design

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apopt..23..520r&link_type=abstract

Applied Optics (ISSN 0003-6935), vol. 23, Feb. 15, 1984, p. 520-522. NASA-supported research.

Physics

Optics

7

Lens Design, Mirrors, Reflecting Telescopes, Spaceborne Telescopes, Surface Geometry, Aberration, Asphericity, Optical Correction Procedure

Scientific paper

Space-based telescopes for sub-mm astronomy may require large, segmented primary mirrors. While spherical segments are the easiest to manufacture and test, a fast sphere produces large aberrations which must be corrected by one or more aspheric surfaces. Attention is presently given to an f/10 system with an f/0.7 spherical primary mirror and a field of view of + or - 1.5 min of arc. The third and fourth mirrors are conics, and the secondary is a 24th-degree power series on a base sphere. For sub-mm astronomy, a reasonable target for this design is a diffraction-limited image at 30 microns. In an effort to improve performance, the Wassermann-Wolf (1949) approach to aspheric design was applied.

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