Physics – Optics
Scientific paper
Jul 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apopt..32.3559r&link_type=abstract
Applied Optics (ISSN 0003-6935), vol. 32, no. 19, p. 3559-3569.
Physics
Optics
13
Coronagraphs, Electron Density (Concentration), Light (Visible Radiation), Optical Reflection, Polarimeters, Retarding, Irradiance, Linear Polarization, Ultraviolet Radiation
Scientific paper
An analysis of stray-light suppression in the white-light channel of the Ultraviolet Coronagraph Spectrometer experiment for the Solar and Heliospheric Observatory is reported. The white-light channel consists of a reflecting telescope with external and internal occultation and a polarimeter section. Laboratory tests and analytical methods are used to perform the analysis. The various stray-light contributions are classified in two main categories: the contribution from sunlight that passes directly through the entrance aperture and the contribution of sunlight that is diffracted by the edges of the entrance aperture. Values of the stray-light contributions from various sources and the total stray-light level for observations at heliocentric heights from 1.4 to 5 solar radii are derived. Anticipated signal-to-stray-light ratios are presented together with the effective stray-light rejection by the polarimeter, demonstrating the efficacy of the stray-light suppression design.
Gardner Larry D.
Kohl John L.
Romoli Marco
Weiser Heinz
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