9 January 1984 A Solar Lyman Alpha Coronagraph
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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.
© (1984) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jacques M Beckers, Harold V Argo, "A Solar Lyman Alpha Coronagraph", Proc. SPIE 0445, Instrumentation in Astronomy V, (9 January 1984); doi: 10.1117/12.966162; https://doi.org/10.1117/12.966162
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