Close

Search

Search Menu
Photonics Media Photonics Buyers' Guide Photonics EDU Photonics Spectra BioPhotonics EuroPhotonics Vision Spectra Photonics Showcase Photonics ProdSpec Photonics Handbook
More News

Phase Contrast Produces Dynamic, Multiple-Beam Optical Tweezers

Facebook Twitter LinkedIn Email Comments
Using generalized, phase-contrast-based encoding onto a spatial light modulator, researchers at the Risø National Laboratory in Roskilde, Denmark, have demonstrated a nonmechanical method to produce an array of optical trapping beams whose position, size, shape and intensity can be individually manipulated. They created the trapping patterns on the parallel-aligned, liquid-crystal-type light modulator from Hamamatsu Photonics with a Sony VGA-resolution liquid crystal projector element controlled by a PC. The modulator divided the beam from a 200-mW, 830-nm SDL diode laser into multiple optical trapping beams with approximately 1.3 mW of power. As described in the July 15 issue of Optics Express, the researchers used the system to "mouse control" as many as 16 2-µm polystyrene beads simultaneously.

Photonics Spectra
Oct 2002
Research & TechnologyTech Pulse

Comments
back to top
Facebook Twitter Instagram LinkedIn YouTube RSS
©2019 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA, info@photonics.com

Photonics Media, Laurin Publishing
x Subscribe to Photonics Spectra magazine - FREE!
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.