Ultrafast focal reducer design for ~2-m-class telescopes

Details Ultrafast focal reducer design for ~2-m-class telescopes Ultrafast focal reducer design for ~2-m-class telescopes

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5523...31b&link_type=abstract

Current Developments in Lens Design and Optical Engineering V. Edited by Mouroulis, Pantazis Z.; Smith, Warren J.; Johnson, R.

Computer Science

Scientific paper

An ultra-fast focal reducer design originally intended for use with spherical primary mirrors (published in Optical Engineering, February, 2003), has been adapted for use as a retro-fit for existing telescopes of ~2m pupil diameter that have aspheric mirrors. The focal reducer has only one aspheric surface, located at the aperture stop, and can provide speeds up to f/0.75 while maintaining a wide field with pixel-limited resolution and a broad spectral passband. Examples have been computed for Ritchie-Chretien, Dall-Kirkham and Cassegrain systems, and for use at the prime focus of mirrors with non-zero conic constants.

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