Lego Optics Lab: Filter Rotator

When working with an optics lab, on occasion you might need a mechanism to rotate filters such as a polarized filter. I’ll demonstrate how I built a filter rotator for my Lego Optics lab. I used the Lego Technic turntable gear and other Lego bits to build it.

The polarized filter came from a handheld electronic game that the batteries leaked and ruined (I try to salvage what I can from broken things before recycling them) and cut it to fit on the turntable gear.

See the set of pictures below for step-by-step instructions to build the filter rotator:

The filter rotator can be mounted on a Lego base plate (48 X 48 studs) to be used in optics lab experiments.