Diffraction-limited catadioptric telescopes with all spherical surfaces

Details Diffraction-limited catadioptric telescopes with all spherical surfaces Diffraction-limited catadioptric telescopes with all spherical surfaces

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001izkry..97..101t&link_type=abstract

Izvestiya Krymskoj Astrofizicheskoj Observatorii, Tom 97, p. 101 - 113 (2001)

Physics

Optics

Telescopes, Optics

Scientific paper

Optical properties of the Maksutov and Richter-Slevogt systems are compared for the focal ratios near to f/2.5. Since Richter-Slevogt two-lens corrector is afocal, this system has much more mild tolerances for better image quality and larger field of view. The modified Richter-Slevogt system is proposed, which includes a corrector with moved apart components and the small spherical lens not far from a focal plane. The typical RMS deviation of the wavefront for the proposed systems is ~=λ/30 in a flat field of view 2ω~=3° - 5° and spectral range of 2000Å width. The Richter-Slevogt system is also designed with focal ratio f/6.0 and central obscuration coefficient 0.22; it has only three different radii of curvature. Results of observations with the telescope f/2.5 constructed according to one of the proposed layouts, are in agreement with calculations.

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