Ads
related to: overhead projector identification- Epson Projectors
Delivering Display Solutions.
For Every Environment.
- 3-Chip 3LCD Technology
Exceptional Color Accuracy.
No Rainbow Effect. Learn More.
- Deals, Sales & Promotions
Shop Special Promotions.
Find the Right Product for You.
- Color Projectors
Up to 4,6000 Lumens.
Ideal for Presentations & Play.
- Epson Projectors
Search results
Results From The WOW.Com Content Network
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.
In the late 1950s and early 1960s, overhead projectors began to be widely used in schools and businesses. The first overhead projector was used for police identification work. [citation needed] It used a celluloid roll over a 9-inch stage allowing facial characteristics to be rolled across the stage. The United States military in 1940 was the ...
Pages in category "Projectors" The following 37 pages are in this category, out of 37 total. ... Polylux (overhead projector) Profile Projector; Projection booth;
The Polylux was an overhead projector produced in the German Democratic Republic (GDR). It also functioned as a generic name for overhead projectors in the GDR. The Polylux was produced in the VEB (Volkseigener Betrieb: people’s enterprise) Phylatex-Physikgeräte DDR, in Frankenberg near Chemnitz (then known as Karl-Marx-Stadt). It was ...
It is a modern equivalent of the slide projector or overhead projector. To display images, LCD (liquid-crystal display) projectors typically send light from a metal-halide lamp through a prism or series of dichroic filters that separates light to three polysilicon panels – one each for the red, green and blue components of the video signal ...