Design and experimental test of an optical vortex coronagraph

Using an optical vortex coronagraph （OVC） is one of the most promising techniques for di- rectly imaging exoplanets because of its small inner working angle and high throughput. This paper presents the design and laboratory demonstration performance of an OVC based on liquid crystal polymers （LCPs）...

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Bibliographic Details
Published in:Research in astronomy and astrophysics 2017-05, Vol.17 (6), p.101-106
Main Authors: Liu, Cheng-Chao, Ren, De-Qing, Zhu, Yong-Tian, Dou, Jiang-Pei
Format: Article
Language:English
Subjects:
Adaptive optics
Coronagraphs
Extrasolar planets
instrumentation: coronagraph
Laboratories
Laboratory tests
Liquid crystal polymers
Liquid crystals
methods: laboratory
Optics
Polymers
techniques: optical vortex
Vortices
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Summary:Using an optical vortex coronagraph （OVC） is one of the most promising techniques for di- rectly imaging exoplanets because of its small inner working angle and high throughput. This paper presents the design and laboratory demonstration performance of an OVC based on liquid crystal polymers （LCPs） at 633 nm and 1520 nm. The OVC can deliver good performance in laboratory tests and achieve a contrast of 10-6 at an angular distance of 3A/D, which can be implemented for imaging young giant exoplanets in combination with extreme adaptive optics.
ISSN:1674-4527
2397-6209
DOI:10.1088/1674-4527/17/6/60