Wide spectral range F/2.3 prime focus spherical corrector for 3.5 M Ritchey-Chretien telescope

Details Wide spectral range F/2.3 prime focus spherical corrector for 3.5 M Ritchey-Chretien telescope Wide spectral range F/2.3 prime focus spherical corrector for 3.5 M Ritchey-Chretien telescope

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1130...68m&link_type=abstract

IN: New technologies for astronomy; Proceedings of the Meeting, Paris, France, Apr. 25, 26, 1989 (A90-37976 16-89). Bellingham,

Astronomy and Astrophysics

Astronomy

Foci, Image Resolution, Lens Design, Optical Correction Procedure, Telescopes, Error Analysis, Field Of View, Interferometry, Layouts

Scientific paper

The present three spherical-lens corrector is able to produce a wide and flat prime-focus field at the F/2.2 focus of a 3.5-m aperture Ritchey-Chretien telescope, over the 300-1100 nm spectral range. The corrector is distinguished from more conventional devices by reduced optics size, all-spherical surfaces, and greater than 1 arcsec resolution within a 30-arcmin flat field. Point-spread and encircled energy functions for different off-axis values and spectral ranges are presented to illustrate the corrector's image quality. An analysis of possible alignment errors is performed on the basis of computed interferograms.

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