Peering into darkness with a vortex spatial filter
Optics Letters, Vol. 26, Issue 8, pp. 497-499 (2001)
http://dx.doi.org/10.1364/OL.26.000497
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Abstract
I propose to use as a window the dark core of an optical vortex to examine a weak background signal hidden in the glare of a bright coherent source. Applications such as the detection of an astronomical object, forward-scattered radiation, and incoherent light are described whereby signal enhancements of at least 7 orders of magnitude may be achieved.
© 2001 Optical Society of America
[Optical Society of America ]
OCIS Codes
(050.1970) Diffraction and gratings : Diffractive optics
(100.5090) Image processing : Phase-only filters
(120.1880) Instrumentation, measurement, and metrology : Detection
(290.0290) Scattering : Scattering
(350.1260) Other areas of optics : Astronomical optics
Citation
Grover A. Swartzlander, Jr., "Peering into darkness with a vortex spatial filter," Opt. Lett. 26, 497-499 (2001)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-26-8-497
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