Projection module for e.g. overhead projector, has lens with optical axis parallel to screen, two reference mirrors for transmitting image beam from lens towards hyperbolic convex mirror which enlarges and transmits image beam

摘要

The module has a lens (41), transmitting an image beam (47) towards a reference mirror (42), having an optical axis parallel to a screen. A reference mirror (43) receives the beam from the mirror (42) to reflect the beam towards a hyperbolic convex mirror (44). The mirror (44) enlarges and transmits the beam towards a third reference mirror which transmits the beam towards the screen. An independent claim is also included for a projection apparatus having an optical engine.