A Solar Lyman Alpha Coronagraph

Jacques M Beckers; Harold V Argo

doi:10.1117/12.966162

9 January 1984 A Solar Lyman Alpha Coronagraph

Jacques M Beckers, Harold V Argo

Proceedings Volume 0445, Instrumentation in Astronomy V; (1984) https://doi.org/10.1117/12.966162
Event: 1983 Astronomy Conferences, 1983, London, United Kingdom

Abstract

We describe an all reflecting externally and internally occulting solar coronagraph which can be used for observations of the sun in the hydrogen Lyman a line. In the particular design considered and tested, a multiple occulting disk assembly is integrated with a Gregorian telescope in such a way that (i) scattered and diffracted light is minimized, and (ii) a large effective collecting area (16 cm2) as compared to the total telescope length (95 cm) is obtained. The telescope is suncentered pointed and has a large field of view (2.3 degrees diameter). Its image can be used to feed a multiple slit spectrograph, a camera using a Lyman a interference filter or other instrumentation which can make use of the availability of a full coronal image.

Citation Download Citation

Jacques M Beckers and Harold V Argo "A Solar Lyman Alpha Coronagraph", Proc. SPIE 0445, Instrumentation in Astronomy V, (9 January 1984); https://doi.org/10.1117/12.966162

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