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As copying technology advanced, Thermofax machines were subsequently marketed as a method of producing transparencies (viewgraphs) for overhead projector presentations. A sheet of heat-sensitive clear stock was placed on top of the original, and passed through a ThermoFax, producing a black image on the clear stock.
An overhead projector works on the same principle as a slide projector, in which a focusing lens projects light from an illuminated slide onto a projection screen where a real image is formed. However some differences are necessitated by the much larger size of the transparencies used (generally the size of a printed page), and the requirement ...
Overhead projector in operation, with a transparency being flashed. A transparency, also known variously as a viewfoil or foil (from the French word "feuille" or sheet), or viewgraph, is a thin sheet of transparent flexible material, typically polyester (historically cellulose acetate), onto which figures can be drawn.
3M Public Relations and Corporate Communications 3M Center, Building 225-1S-15 St. Paul, MN 55144-1000. About 3M. 3M captures the spark of new ideas and transforms them into thousands of ingenious ...
3M Launches First-of-Its-Kind Streaming Projector 3M Streaming Projector Uses New Roku® Streaming Stick Providing Access to Hundreds of Channels Practically Anywhere ST. PAUL, Minn.--(BUSINESS ...
3M just got done pushing out its MPro 120, and here at CES we're already feasting our eyes on the MPro 150. For all intents and purposes, this is just an MPro 120 with 1GB of internal storage and ...
It works with an overhead projector. The panel consists of a translucent LCD, and a fan to keep it cool. The projection panel sits on the bed of the overhead projector, and acts like a piece of transparency. The panels have a VGA input, and sometimes Composite (RCA) and S-Video input. Later models have remotes, with functions such as 'freeze ...
A projector or image projector is an optical device that projects an image (or moving images) onto a surface, commonly a projection screen. Most projectors create an image by shining a light through a small transparent lens , but some newer types of projectors can project the image directly, by using lasers .