Noun
pinhole camera (plural pinhole cameras)
(photography) A simple lensless device for producing a photographic image, consisting of an enclosed box with film or some other flat photosensitive surface on one interior side and a tiny hole in the opposite side.
A hole in the cave wall will act as a pinhole camera and project a laterally reversed, upside down image on a piece of paper. Source: Internet
Projection is not limited to perspective projections, such as those resulting from casting a shadow on a screen, or the rectilinear image produced by a pinhole camera on a flat film plate. Source: Internet
As this trait developed, the eye became effectively a pinhole camera which allowed the organism to dimly make out shapes—the nautilus is a modern example of an animal with such an eye. Source: Internet
He created the first pinhole camera after observing how light traveled through a window shutter. Source: Internet
New Haven:Yale University Press. pg 39 In the book, he was also the first to study the phenomenon of the pinhole camera citation and delved further into the way the eye itself works. Source: Internet