6533b832fe1ef96bd129ad0f

RESEARCH PRODUCT

Zone plates with cells apodized by Legendre profiles

Manuel Martínez-corralPedro AndrésJorge Ojeda-castaneda

subject

PhysicsDiffractionFocus (geometry)business.industryMaterials Science (miscellaneous)Spectral densityZone plateIndustrial and Manufacturing Engineeringlaw.inventionsymbols.namesakeOpticsFourier transformApodizationlawsymbolsTransmittanceBusiness and International ManagementbusinessLegendre polynomials

description

By apodizing the cells of a zone plate and changing the opening ratio, it is possible to shape the relative power spectrum of its foci. We describe a novel procedure that leads to an analytical formula for shaping the focus power spectrum by using apodizers expressible as the Legendre series; these act on cells of arbitrary opening ratio. Our general result is used to design zone plates that have missing foci and to discuss a synthesis procedure using apodizers with various opening ratios. Our applications can also be used for shaping the power spectrum of 1-D gratings.

https://doi.org/10.1364/ao.29.001299