Modified Rumsey Telescope and associated elasticity design for active aspherization

Gerard R. Lemaitre

doi:10.1117/12.269067

21 March 1997 Modified Rumsey Telescope and associated elasticity design for active aspherization

Gerard R. Lemaitre

Proceedings Volume 2871, Optical Telescopes of Today and Tomorrow; (1997) https://doi.org/10.1117/12.269067
Event: Optical Telescopes of Today and Tomorrow, 1996, Landskrona/Hven, Sweden

Abstract

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.

Citation Download Citation

Gerard R. Lemaitre "Modified Rumsey Telescope and associated elasticity design for active aspherization", Proc. SPIE 2871, Optical Telescopes of Today and Tomorrow, (21 March 1997); https://doi.org/10.1117/12.269067

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