2026-04-13T01:28:18Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/243102025-12-05T14:48:02Zcom_2072_1057col_2072_478821col_2072_478917

00925njm 22002777a 4500 dc López-Quesada, Carol author Andilla i Salla, Jordi author Martín Badosa, Estela author 2012-04-23T07:15:06Z 2012-04-23T07:15:06Z 2008 Optical aberration due to the nonflatness of spatial light modulators used in holographic optical tweezers significantly deteriorates the quality of the trap and may easily prevent stable trapping of particles. We use a Shack-Hartmann sensor to measure the distorted wavefront at the modulator plane; the conjugate of this wavefront is then added to the holograms written into the display to counteract its own curvature and thus compensate the optical aberration of the system. For a Holoeye LC-R 2500 reflective device, flatness is improved from 0.8¿ to ¿/16 (¿=532 nm), leading to a diffraction-limited spot at the focal plane of the microscope objective, which makes stable trapping possible. This process could be fully automated in a closed-loop configuration and would eventually allow other sources of aberration in the optical setup to be corrected for. Òptica Optics Correction of aberration in holographic optical tweezers using a Shack-Hartmann sensor