title: Fast digital hologram generation and adaptive force measurement in liquid-crystal-display-based holographic tweezers.
abstract: Computer-generated holograms in conjunction with spatial light modulators (SLMs) offer a way to dynamically generate holograms that are adapted to specific tasks. To use the full dynamic capability of the SLM, the hologram computation should be very fast. We present a method that uses the highly parallel architecture of a consumer graphics board to compute analytical holograms in video real time. A precice characterization of the SLM (Holoeye LC-R-2500) and the adaption of its settings to our near-infrared application is necessary to guarantee an efficient hologram reconstruction. The benefits of a fast computation of adapted holograms and the application of an efficient SLM are demonstrated by measuring the trapping forces of holographic tweezers.
authors.affiliation: Institut für Technische Optik, Pfaffenwaldring 9, 70569 Stuttgart, Germany.
authors.forename: Marcus
authors.initials: M
authors.lastname: Reicherter
authors.forename: Susanne
authors.initials: S
authors.lastname: Zwick
authors.forename: Tobias
authors.initials: T
authors.lastname: Haist
authors.forename: Christian
authors.initials: C
authors.lastname: Kohler
authors.forename: Hans
authors.initials: H
authors.lastname: Tiziani
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Osten