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Infrared (IR) Spectroscopy: Overview01:09

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A balloon-borne infrared coronagraph.

R M Macqueen

    Applied Optics
    |January 14, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A stratospheric balloon-borne coronagraph successfully observed the outer solar corona at 2.2 micrometers. This study details the instrument

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    Area of Science:

    • Solar physics
    • Astronomy
    • Optical instrumentation

    Background:

    • Observing the outer solar corona requires specialized instruments to minimize stray light.
    • Stratospheric balloon platforms offer advantages for solar observation by reducing atmospheric interference.

    Purpose of the Study:

    • To successfully deploy and operate a stratospheric balloon-borne coronagraph for outer solar corona observation.
    • To characterize stray light origins and wavelength dependence within the instrument.

    Main Methods:

    • Utilized a coronagraph with external occultation (three straight edges) and an axial Lyot component.
    • Employed a scanning mechanism involving rotation of the rear Lyot section.
    • Conducted stray light measurements at 0.5, 0.8, and 2.2 micrometers.

    Main Results:

    • Successfully obtained observations of the outer solar corona at 2.2 micrometers.
    • Identified origins of stray light within the coronagraph system.
    • Deduced a wavelength dependence for scattered light originating from the objective lens.

    Conclusions:

    • The stratospheric balloon-borne coronagraph is a viable instrument for outer solar corona studies.
    • Understanding and minimizing stray light is critical for accurate coronal observations.
    • The instrument's design and measurement capabilities were validated.