An apparatus for household or family use invented by Lemaire in the mid-19th century and inspired by the public shows of the mondo nuovo or zograscope. It is a portable box with a lens in front which provides optical views.
These optical views are translucent, and changing the angle of the light allows the image to be adjusted. For example, if the light comes from the front, the image viewed is in complete daylight; if the light ray comes through the back, the image turns nocturnal.