6533b873fe1ef96bd12d4bc3

RESEARCH PRODUCT

Study of spatial lateral resolution in off-axis digital holographic microscopy

Emilio Sánchez-ortigaManuel Martínez-corralAna DoblasJorge Garcia-sucerquia

subject

DiffractionPhysicsImage formationbusiness.industryResolution (electron density)HolographyAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic Materialslaw.inventionAngular spectrum methodOpticslawDigital holographic microscopyElectrical and Electronic EngineeringPhysical and Theoretical ChemistryInvariant (mathematics)businessPixel density

description

The lateral resolution in digital holographic microscopy (DHM) has been widely studied in terms of both recording and reconstruction parameters. Although it is understood that once the digital hologram is recorded the physical resolution is fixed according to the diffraction theory and the pixel density, still some researches link the resolution of the reconstructed wavefield with the recording distance as well as with the zero-padding technique. Aiming to help avoiding these misconceptions, in this paper we analyze the lateral resolution of DHM through the variation of those two parameters. To support our outcomes, we have designed numerical simulations and experimental verifications. Both the simulations and the experiments confirm that DHM is indeed resolution invariant in terms of the recording distance and the zero-padding provided that it operates within the angular spectrum regime.

yearjournalcountryeditionlanguage
2015-10-01Optics Communications
https://doi.org/10.1016/j.optcom.2015.04.066