n. a device consisting of two consecutive disks that operate in opposing directions. The front disk is completely opaque but has four slits to aid in the viewing of an image on the back disk. If both disks are rotating at the optimal speed, then the picture on the back disk will appear stationary and normal. However, if the speed is not appropriate, the image on the back disk will appear distorted. [first constructed by Joseph Antoine Ferdinand Plateau (1801-1888), Belgian inven
ANORTHOSCOPE: “An anorthoscope is comprised of two rotating disks, one behind the other, that when moving correctly allow the eye to see a perfect image on the back disk.”