This is our actuator. It is sort of like a GM-20 but much better. These are commonly used as shutters and beam actuators, for example on beam tables that use actuators to bring mirrors into and out of the beam. This is not particularly fast, but is very smooth and reliable. It simply operates by voltage. If you put 6 volts to the coils the mirror will move +15 degrees. If you put 12 volts, you get +30 degrees. So it is completely linear and also bidirectional (-6V will move -15 degrees).
We're in the process of creating a half inch round version as well. We believe it will be popular due to the smaller package size. Basically you'd be able to slide it right into a post mount holder. The smaller actuator has many of the same properties as the large one you see there (linear position versus voltage profile, high coil impedance around 50 ohms for low current operation, high quality construction).
These developments are only vaguely related to our scanner developments, which work on a completely different principle.