ASI’s FW-1000 filter wheel utilizes a closed-loop DC servomotor to provide high speed (less than 40 milliseconds between adjacent positions) and low vibration operation (less than 3 x 10-4 kg-m2/s maximum vibration torque impulse). The unit employs a high-resolution rotary encoder for positional feedback and utilizes non-volatile flash memory to store programmable filter sequences and delays. Motion can be triggered by TTL input pulse, and the controller will output a TTL sync pulse upon arrival at the commanded filter position. The closed-loop design allows for precise control of speed and velocity profiles. 

are available to hold eight 25 mm, or six 32mm, filters. Optional high-speed shutters can be added, and multiple wheels can be controlled from a single controller. Adapters are available to attach the system to the excitation or emission ports of any research-grade microscope, and the unit can be easily configured for OEM applications.