title: Chromospheric Helium Imaging Photometer (an Instrument for High Time Cadence 1083-nm Wavelength Solar Observations).
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.
authors.forename: D F
authors.initials: DF
authors.lastname: Elmore
authors.forename: G L
authors.initials: GL
authors.lastname: Card
authors.forename: C W
authors.initials: CW
authors.lastname: Chambellan
authors.forename: D M
authors.initials: DM
authors.lastname: Hassler
authors.forename: H L
authors.initials: HL
authors.lastname: Hull
authors.forename: A R
authors.initials: AR
authors.lastname: Lecinski
authors.forename: R M
authors.initials: RM
authors.lastname: Macqueen
authors.forename: K V
authors.initials: KV
authors.lastname: Streander
authors.forename: J L
authors.initials: JL
authors.lastname: Streete
authors.forename: O R
authors.initials: OR
authors.lastname: White