New technology mirror coronagraph with extended applications

Raymond N. Smartt; Serge L. Koutchmy; Stephen A. Colley; R. Caron; Rainer Schwenn; Sergio R. Restaino

doi:10.1117/12.19200

1 July 1990 New technology mirror coronagraph with extended applications

Raymond N. Smartt, Serge L. Koutchmy, Stephen A. Colley, R. Caron, Rainer Schwenn, Sergio R. Restaino

Proceedings Volume 1236, Advanced Technology Optical Telescopes IV; (1990) https://doi.org/10.1117/12.19200
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

Abstract

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.

Citation Download Citation

Raymond N. Smartt, Serge L. Koutchmy, Stephen A. Colley, R. Caron, Rainer Schwenn, and Sergio R. Restaino "New technology mirror coronagraph with extended applications", Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); https://doi.org/10.1117/12.19200

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