带椭圆孔径的光学涡旋日冕仪。

Optical vortex coronagraphy with an elliptical aperture.

作者信息

Ruane Garreth J, Swartzlander Grover A

机构信息

Chester F. Carlson Center for Imaging Science, Rochester Institute of Technology, 54 Lomb Memorial Dr., Rochester, NY 14623, USA.

出版信息

Appl Opt. 2013 Jan 10;52(2):171-6. doi: 10.1364/AO.52.000171.

DOI:10.1364/AO.52.000171

PMID:23314632

Abstract

An optical vortex coronagraph that makes efficient use of a larger fraction of the clear aperture of a Cassegrain-type telescope is described. This design incorporates an elliptical subaperture rather than the conventional circular subaperture. We derive a new vortex phase mask that maintains the same theoretical contrast of a circularly symmetric vortex coronagraph.

摘要

描述了一种能有效利用卡塞格伦型望远镜更大比例通光孔径的光学涡旋日冕仪。这种设计采用了椭圆形子孔径而非传统的圆形子孔径。我们推导了一种新的涡旋相位掩膜，其保持了与圆对称涡旋日冕仪相同的理论对比度。