New technology mirror coronagraph with extended applications

Details New technology mirror coronagraph with extended applications New technology mirror coronagraph with extended applications

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1236..206s&link_type=abstract

IN: Advanced technology optical telescopes IV; Proceedings of the Meeting, Tucson, AZ, Feb. 12-16, 1990. Part 1 (A91-23201 08-89

Astronomy and Astrophysics

Astronomy

1

Coronagraphs, Imaging Techniques, Mirrors, Solar Corona, Astronomical Photography, Silicon, Solar Observatories, Telescopes

Scientific paper

General design considerations of objective-mirror coronagraphs are presented. A 1-m-focal-length prototype reflecting coronagraph based on a 5.5-cm aperture spherical superpolished silicon mirror objective is described. The design is simple off-axis reflection from the objective to a conventional coronagraph optical system (occulting disk, field lens, Lyot stop, and imaging system). This instrument has produced the first images of the emission corona using a ground-based reflecting coronagraph. A second prototype instrument based on a 15-cm aperture superpolished fused-silica mirror is also described.

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