Direct control on optical micro-tools using a high resolution LCD

Alexander Jesacher, Severin Fürhapter, Stefan Bernet, and Monika Ritsch-Marte

Medical University of Innsbruck, Division for Biomedical Physics, Müllerstrasse 44, A-6020 Innsbruck, Austria

We present a new setup for holographical steering of laser tweezers using a reflective high resolution spatial light modulator (SLM). Moving trapped objects in the focal plane of a microscope objective is possible without the need for time consuming re-calculation of holograms. Arbitrary light distributions can be created and controlled independently just by "mouse-dragging" the hologram window at the SLM display. In addition, undesired diffraction orders are suppressed using adequately calculated Fresnel holograms.

Email: monika.ritsch-marte@uibk.ac.at

Address: Division for Biomedical Physics, Medical University of Innsbruck,, Müllerstr. 44, A-6020 Innsbruck, Austria