Sub-Rayleigh optical vortex coronagraphy
2012 (English)In: Optics Express, ISSN 1094-4087, Vol. 20, no 3, 2445-2451 p.Article in journal (Refereed) Published
We introduce a new optical vortex coronagraph(OVC) method to determine the angular distance between two sources when the separation is sub-Rayleigh. We have found a direct relationship between the position of the minima and the source angular separation. A priori knowledge about the location of the two sources is not required. The superresolution capabilities of an OVC, equipped with an l = 2 N-step spiral phase plate in its optical path, were investigated numerically. The results of these investigations show that a fraction of the light, increasing with N, from the secondary source can be detected with a sub-Rayleigh resolution of at least 0.1 lambda/D.
Place, publisher, year, edition, pages
2012. Vol. 20, no 3, 2445-2451 p.
IdentifiersURN: urn:nbn:se:uu:diva-172064DOI: 10.1364/OE.20.002445ISI: 000300499500051OAI: oai:DiVA.org:uu-172064DiVA: diva2:513323