The properties of optical vortices produced with spiral phase plates have recently found interesting applications in astronomical coronagraphy. Here we review the characteristics of the optical vortex coronagraph. Our simulations show that the intensity of an on-axis star can be fainted by 10 orders of magnitude, thus allowing the detection of close faint sources like extrasolar planets. We also discuss the expected coronagraphic performances achievable with a stepped spiral phase plate. Springer Science+Business Media B.V. 2009.
Light's orbital angular momentum and optical vortices for astronomical coronagraphy from ground and space telescopes / Barbieri C.; Tamburini F.; Anzolin G.; Bianchini A.; Mari E.; Sponselli A.; Umbriaco G.; Prasciolu M.; Romanato F.; Villoresi P.. - In: EARTH MOON AND PLANETS. - ISSN 0167-9295. - ELETTRONICO. - 105:2-4(2009), pp. 283-288. [10.1007/s11038-009-9325-8]
Light's orbital angular momentum and optical vortices for astronomical coronagraphy from ground and space telescopes
Umbriaco G.;
2009
Abstract
The properties of optical vortices produced with spiral phase plates have recently found interesting applications in astronomical coronagraphy. Here we review the characteristics of the optical vortex coronagraph. Our simulations show that the intensity of an on-axis star can be fainted by 10 orders of magnitude, thus allowing the detection of close faint sources like extrasolar planets. We also discuss the expected coronagraphic performances achievable with a stepped spiral phase plate. Springer Science+Business Media B.V. 2009.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
