A microscope that magnifies and projects its images onto a screen.
A small data projector that is used with smartphones and other mobile devices. Introduced in 2008, microprojectors either plug into, or the mechanism is built into, the device. A microprojector can emit an image onto any handy flat surface typically up to 20" in bright light and up to 50" in the dark. See data projector
and pocket projector
Weighing less than six ounces and accepting resolutions up to 1280x768, this 3M microprojector was designed to project images from cellphones and media players. (Image courtesy of 3M, www.3m.com)