Abstract

To reduce the level of stray light in a new-generation externally occulted space coronagraph, we consider new concepts for its external occulter and its associated diaphragm and report extended measurements of their light-rejection properties. The experimental setup, which includes an artificial Sun, uses both photometric and CCD imaging techniques and permits the study of the sensitivity to misalignement of the instrument’s performance. Conic occulters that have either a multithreaded or a polished surface are found to give performances superior to those of the classical three-disk system and further are highly tolerant to misalignement. Serrated diaphragms outperform circular ones, as the bulk of the diffracted light is diverted from the coronagraphic objective.

© 2000 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
External occulter laboratory demonstrator for the forthcoming formation flying coronagraphs

Federico Landini, Sébastien Vives, Mélanie Venet, Marco Romoli, Christophe Guillon, and Silvano Fineschi
Appl. Opt. 50(36) 6632-6644 (2011)

Computation of the diffracted field of a toothed occulter by the semi-infinite rectangle method

Mingzhe Sun, Hongxin Zhang, Heyang Bu, Xiaoxun Wang, Junlin Ma, and Zhenwu Lu
J. Opt. Soc. Am. A 30(10) 2140-2149 (2013)

Reduction of Scattered Light in the Coronagraph

Gordon Newkirk and David Bohlin
Appl. Opt. 2(2) 131-140 (1963)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (12)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (3)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription