Modified Rumsey Telescope and associated elasticity design for active aspherization

Details Modified Rumsey Telescope and associated elasticity design for active aspherization Modified Rumsey Telescope and associated elasticity design for active aspherization

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997spie.2871..436l&link_type=abstract

Proc. SPIE Vol. 2871, p. 436-449, Optical Telescopes of Today and Tomorrow, Arne L. Ardeberg; Ed.

Physics

Optics

2

Scientific paper

The three-mirror Rumsey telescope is a flat field anastigmat. Compared to the curved field Schmidt telescope, its compactness and full achromaticity are particularly interesting features for potential CCD mosaics. In counterpart the difficulties involved in aspherizing the three mirrors explain the fact that no such telescope is presently being built for larger sizes than 30-cm primaries. This paper provides solutions to this problem via active optics methods; it considers the case where the tertiary is linked in a continuous geometry to the primary, both mirrors being aspherized from a same sphere. The optical and elasticity designs of a 1-meter telescope are presented. The active aspherization can be achieved as well by stress polishing as in situ at the telescope.

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