2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/229876An experimental set-up for the measurement of the Casimir effect at separations larger than a few microns is presented. The apparatus is based on a mechanical resonator and uses a homodyne detection technique to sense the Casimir force in the plane-parallel configuration. First measurements in the 3-10 micrometer range show an unexpected large force probably due to patch effects.Proceedings of the workshop On the 60 Years on Casimir EffectQuantum Physicstext