Abstract

A white light vortex coronagraph was used to experimentally achieve sub-resolution detection. The angular location of the centroid $\gamma$, and the angular extent of circular pinhole sources $\mathrm{\Theta }$, were measured to within errors of $\delta \gamma =\pm 0.015\lambda /D$ and $\delta \mathrm{\Theta }=\pm 0.026\lambda /D$. This technique has two advantages over conventional imaging: simple power measurements are made and shorter exposure times may be required to achieve a sufficient signal-to-noise ratio.

© 2014 Optical Society of America

Obtaining spatial information from an extremely unresolved source

Grover A. Swartzlander
Opt. Lett. 36(24) 4731-4733 (2011)

Optical vortex coronagraphy with an elliptical aperture

Garreth J. Ruane and Grover A. Swartzlander
Appl. Opt. 52(2) 171-176 (2013)

Astronomical demonstration of an optical vortex coronagraph

Grover A. Swartzlander, Erin L. Ford, Rukiah S. Abdul-Malik, Laird M. Close, Mary Anne Peters, David M. Palacios, and Daniel W. Wilson
Opt. Express 16(14) 10200-10207 (2008)

Sub-Rayleigh optical vortex coronagraphy

E. Mari, F. Tamburini, G. A. Swartzlander, A. Bianchini, C. Barbieri, F. Romanato, and B. Thidé
Opt. Express 20(3) 2445-2451 (2012)

Separation of coherent and incoherent light using image plane vortex phase masks

Abbie T. Watnik, Shawn Divitt, and Matthew Hart
J. Opt. Soc. Am. A 40(7) 1372-1381 (2023)