Diagram of Louis Daguerre's diorama. One picture was painted on front of cloth and illuminated by window M), reflected from mirror E): shutter A) could be moved silently across to cut out light. Second picture was painted on the back of the cloth and when shutters N, N) were opened the second picture was illuminated. Louis Daguerre (1787-1851) a French artist and photographer. Dated 19th century