Joaquim Ferreira Dos Santos

Oct 1, 2024 | mdpi.com | Gabriel Carneiro |Joaquim Ferreira Dos Santos |Joaquim J. Sousa |António Cunha

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Aug 15, 2024 | opg.optica.org | Paul Petersen |Michael L. Jakobsen |Joaquim Ferreira Dos Santos |Christian Pedersen

We study the impact of optical aberrations in underwater scanning confocal inelastic imaging arising from refraction at oblique incidences on a refractive index-mismatched air–glass–water interface. We experimentally demonstrate that optical aberrations at non-normal incidence drastically reduce the intensity of the inelastic signal and deteriorate the system resolution. At a 2.5° incidence angle, the return signal decreases to about 20% of its peak value at normal incidence.

May 25, 2024 | onlinelibrary.wiley.com | Joaquim Ferreira Dos Santos |Hans H. Jakobsen |Paul Petersen |Christian Pedersen

1 Introduction Despite its microscopic size, planktonic organisms play a crucial role in maintaining the delicate balance of Earth's ecosystems. Both phytoplankton and zooplankton form the foundation of marine food webs, thus serving as primary food sources for countless marine species. In particular, phytoplankton significantly contributes to global oxygen production through photosynthesis,[1] playing a critical role in regulating the planet's atmospheric content.