Axicon

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Diagram of Axicon and resulting Bessel Beam

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.[1] It can be used to turn a Gaussian beam into an approximation to a Bessel beam, with greatly reduced diffraction.[2][3] Axicons were first proposed in 1954 by John McLeod.[4]

Axicons are used in atomic traps and for generating plasma in linear accelerators. They are used in eye surgery in cases where a ring-shaped spot is useful.

References[edit]

  1. ^ Proteep Mallik (2005). "The Axicon". Retrieved 2007-11-22. 
  2. ^ Kishan Dholakia; David McGloin, and Vene Garcés-Chávez (2002). "Optical micromanipulating using a self-reconstructing light beam". Retrieved 2007-11-22. 
  3. ^ V. Garcés-Chávez; D. McGloin, H. Melville, W. Sibbett and K. Dholakia (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. Retrieved 2007-02-06. 
  4. ^ 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.