An axicon is a specialized type of lens which has a conical surface. An axicon images a point source into a line along the optic axis, or transforms a laser beam into a ring. It can be used to turn a Gaussian beam into an approximation to a Bessel beam, with greatly reduced diffraction. Axicons were first proposed in 1954 by John McLeod.
- Proteep Mallik (2005). "The Axicon". Archived from the original on Nov 23, 2009. Retrieved 2007-11-22.
- Garcés-Chávez, V.; McGloin, D.; Melville, H.; Sibbett, W.; Dholakia, K. (Sep 12, 2002). "Simultaneous micromanipulation in multiple planes using a self-reconstructing light beam". Nature 419 (6903): 145–7. Bibcode:2002Natur.419..145G. doi:10.1038/nature01007. PMID 12226659. Archived from the original on Sep 19, 2006.
- McLeod, John H. (1954). "The axicon: A new type of optical element". J. Opt. Soc. Am. 44 (8): 592. doi:10.1364/JOSA.44.000592.
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