Wide-band coronagraph with sinusoidal phase in the angular direction

Optics Express
Ourui MaFanzhen Hou

Abstract

We suggest a new phase mask coronagraph that can work in a wide band of wavelengths. The phase mask has alternatively sinusoidal and uniform functions in the angular direction. We compare it with the four-quadrant phase mask coronagraph and vortex phase mask coronagraph. Through numerical tests, we find that the new mask gives a deep extinction of star light and has a small inner working angle. It is also shown that this mask has a better performance in chromatism than the others for a wide band of wavelengths.

References

Jan 5, 2006·Optics Letters·Gregory FooGrover A Swartzlander
Jun 14, 2006·Optics Letters·Grover A Swartzlander
Oct 10, 2006·Physical Review Letters·Jae Hoon LeeGrover A Swartzlander
Nov 21, 2007·Optics Letters·Naoshi BabaNobuyuki Hashimoto
Jul 9, 2008·Optics Express·Grover A SwartzlanderDaniel W Wilson
Dec 10, 2009·Optics Express·Manuel P CagigalJosé E Oti

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Citations

Feb 12, 2014·Optics Express·Fanzhen HouOurui Ma

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