6533b855fe1ef96bd12b0626

RESEARCH PRODUCT

Focal shift in optical waves with off-axis focus

Carlos J. Zapata-rodríguezManuel Martínez-corralGenaro Saavedra

subject

DiffractionPhysicsWave propagationbusiness.industryOptical beamAstrophysics::Instrumentation and Methods for AstrophysicsPhysics::OpticsAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsOpticsBessel beamFocal lengthFresnel numberElectrical and Electronic EngineeringPhysical and Theoretical ChemistryFocus (optics)businessFocal shift

description

We present a formulation for a suitable description of the focal shift in optical waves that have an off-axis focus. This shift that is primarily produced along the chief axis is given in terms of the focal distance and depends only on a parameter that is named as the generalized Fresnel number. Any non-uniform, either truncated and non-apertured optical beam with off-axis focus may be considered.

https://doi.org/10.1016/s0030-4018(02)02280-0