STRAY-LIGHT SUPPRESSION IN A REFLECTING WHITE-LIGHT CORONAGRAPH

被引：26

作者：

ROMOLI, M ^{[1
]}

WEISER, H ^{[1
]}

GARDNER, LD ^{[1
]}

KOHL, JL ^{[1
]}

机构：

[1] HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA

来源：

APPLIED OPTICS | 1993年 / 32卷 / 19期

关键词：

CORONAGRAPH; POLARIMETER; STRAY LIGHT;

D O I：

10.1364/AO.32.003559

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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.

引用

页码：3559 / 3569

页数：11

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