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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 2 — Jan. 27, 2014
  • pp: 1884–1895

Wide-band six-region phase mask coronagraph

Fanzhen Hou, Qing Cao, Minning Zhu, and Ourui Ma  »View Author Affiliations

Optics Express, Vol. 22, Issue 2, pp. 1884-1895 (2014)

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An achromatic six-region phase mask coronagraph, used for the detection of exoplanets, is proposed. The mask has six regions in angular direction and could work in wideband. Furthermore, a six-level phase mask, as an example of the six-region phase mask, is theoretically investigated. According to numerical simulations, this specific mask has a deep elimination of starlight, good performance of achromatism and small inner working angle. As a single phase mask, the ratio of the remaining starlight of the six-level phase mask to the total incident starlight is less than 0.001 when the wavelength is between 500 nm and 600 nm.

© 2014 Optical Society of America

OCIS Codes
(070.6110) Fourier optics and signal processing : Spatial filtering
(100.2980) Image processing : Image enhancement
(110.2970) Imaging systems : Image detection systems
(110.6770) Imaging systems : Telescopes
(350.1260) Other areas of optics : Astronomical optics

ToC Category:
Imaging Systems

Original Manuscript: December 11, 2013
Revised Manuscript: January 8, 2014
Manuscript Accepted: January 13, 2014
Published: January 21, 2014

Fanzhen Hou, Qing Cao, Minning Zhu, and Ourui Ma, "Wide-band six-region phase mask coronagraph," Opt. Express 22, 1884-1895 (2014)

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