An optical vortex coronagraph with a vortex lens provides high contrast imaging over a narrow band of wavelengths. Here we report broadband experimental results by use of a vortex hologram and a dispersion-compensating grating.
© 2012 OSA
P. Kanburapa and G. A. Swartzlander, "White-Light Optical Vortex Coronagraph," in Frontiers in Optics 2012/Laser Science XXVIII, OSA Technical Digest (online) (Optical Society of America, 2012), paper FTh4E.2.
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