As the images mechanically raced behind a revolving shutter, the illusion of motion was created.

Revolving shutters must also rotate smoothly; otherwise uneven exposure will result in ugly vertical banding in the image.

In 1835, the apparatus was upgraded by installation of a revolving shutter which was rotated by a weight-driven clockwork mechanism.

A revolving shutter in the viewer ran in synchronization with the projector shutters, blocking each eye's view of the images intended for the other eye, so that the users simply positioned the viewers in front of their eyes and looked through to see a stereoscopic 3-D image.

In the second storey (rere) of his (Bloom's) house the light of a paraffin oil lamp with oblique shade projected on a screen of roller blind supplied by Frank O'Hara, window blind, curtain pole and revolving shutter manufacturer, 16 Aungier street.