Slide projector for front and rear projection

摘要

A slide projector for both front and rear projection includes a shallow lens tunnel for mounting a simple wide-angle lens. In a first aspect, a second lens port is added to a conventional slide projector designed for front projection. A mirror pivots to invert and direct light rays from an illuminated slide to the simple wide-angle lens. In a second aspect, only the shallow lens tunnel is present and a rotating slide gate orients the slide, depending on operation in front or rear projection mode. Front projection in the second aspect requires a lens tunnel extension.