Physics – Optics
Scientific paper
Dec 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993opten..32.3112s&link_type=abstract
Optical Engineering 32(12), 3112-3120, Brian J. Thompson; Ed.
Physics
Optics
Scientific paper
Future space missions, large or small, that address planetary atmospheres should have the capability to observed occultations of the Sun by the atmosphere and to monitor the solar EUV and FUV flux. To be a viable candidate, the solar spectrograph must not compete with the primary experiments for mass and power. We have designed a compact solar spectrograph that covers the spectral range from approximately 200 to 3200 angstroms. It has no moving parts and records the entire spectrum within its range in a single exposure. The solar spectrograph is based on a classical Rowland grazing incidence design. Because of the intensity of the solar flux, small apertures offer adequate throughput. The spectrum is dispersed along the Rowland circle by three gratings and recorded in three side-by-side segments on a single detector, a CCD. The strong astigmatism in the grazing incidence design is canceled in the foreoptics. We estimate that a flight-ready unit would have a mass of about 1 kg and fit in a volume 20 X 9 X 7 cm.
Broadfoot Lyle A.
Sandel Bill R.
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