Chinese texts
The basic optical principles of the pinhole are commented on
in Chinese texts from the 5th century B.C.
Chinese writers had discovered by experiments that light
travels in straight lines.
The philosopher Mo Ti (470-391 B.C.) was the first to record
the formation of an inverted image with a pinhole or screen.
Mo Ti was aware that objects reflect light in all directions, and
that rays from the top of an object, when passing through a
hole, will produce the lower part of an image.