I've worked on steering our Optical Tweezers instrument using Acousto Optical Deflectors. Here's an example of what it can do. We're trapping four 1 um silica microspheres in water using a single 1064nm laser that is time shared between the beads (it hops between them at a fast rate). Then we can program the AODs to steer the beads around in whatever patterns we want.
Our group attended the 2005 Biophysical Society annual meeting in Long Beach, California.
Continue reading 2005 Biophysical Society Meeting, Long Beach