6533b851fe1ef96bd12aa046

RESEARCH PRODUCT

Focal squeeze in axicons

Carlos J. Zapata-rodríguezFlorencio E. Hernandez

subject

PhysicsDiffractionWavefrontGeometrical opticsbusiness.industryAstrophysics::Instrumentation and Methods for AstrophysicsPhysics::OpticsFresnel lensConical surfaceAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic Materialslaw.inventionOptical axisOpticslawPosition (vector)Fresnel numberElectrical and Electronic EngineeringPhysical and Theoretical Chemistrybusiness

description

The on-axis irradiance distribution of a truncated conical wavefront is evaluated in terms of the Fresnel number of the focusing geometry. In agreement with geometrical optics, a focal line of increasing intensity is generated for extremely high Fresnel numbers. Otherwise clear deviations may be observed for the position of the maximum irradiance along the optical axis. A remarkable focal squeeze appears and, for decreasing Fresnel numbers, this effect manifests stronger. An analytical formula is provided for the fast evaluation of the focal squeeze.

yearjournalcountryeditionlanguage
2005-10-01Optics Communications
https://doi.org/10.1016/j.optcom.2005.05.007