'Virtual triple Schmidt' - Wide field two-stage optics

Details 'Virtual triple Schmidt' - Wide field two-stage optics 'Virtual triple Schmidt' - Wide field two-stage optics

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1013..182m&link_type=abstract

IN: Optical design methods, applications, and large optics; Proceedings of the Meeting, Hamburg, Federal Republic of Germany, Se

Physics

Optics

Design Analysis, Instrument Errors, Optical Equipment, Wave Fronts, Apertures, Mirrors, Optical Correction Procedure, Virtual Properties

Scientific paper

The design concept of an unobscured-wide-field two-stage optical system based on a virtual triple Schmidt (VTS) configuration is presented. It is pointed out that the single large aperture and field-partitioning capability of two-stage systems can lower material and fabrication costs, making the VTS optics suitable for ground-based and space telescopes. The VTS design combines a Schmidt-camera first stage and a second stage comprising two back-to-back Schmidt systems as a 1:1 relay. Aspheric Schmidt correction is achieved at the relayed pupil location for all three systems. The effects of the separation between the error-producing surface and the aperture stop are discussed; the performance of the wavefront-correction system is analyzed; and extensive diagrams, drawings, and graphs of projected performance data are provided.

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