Chromospheric helium imaging photometer (an instrument for high time cadence 1083-nm wavelength solar observations)

1 July 1998

journal article
Published by Optica Publishing Group in Applied Optics

Vol. 37 (19) , 4270-4276
https://doi.org/10.1364/ao.37.004270

Abstract

The scientific motivation, design criteria, and specifications for a new ground-based instrument to observe the Sun in the He i 1083-nm spectral line is described. The instrument employs a liquid-crystal tunable Lyot-type spectral filter and an array detector that allows the full solar disk to be observed with a time cadence of minutes. We describe the telescope’s optical and mechanical features and discuss computer interface and data-reduction procedures employed. Instrument performance during the initial year of operation of the telescope at its high-altitude site is summarized.

Keywords

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