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 ...
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 .
Overhead Projectors. Early 1960s-2015 ... In one of the greatest rivalries in the history of technology, VHS would eventually spell the death knell for Sony's rival Betamax.
GreatWarin3D.org's Keystone View Company history page is available on the site, as is a spreadsheet documenting known World War I views; Stuart A. Rose Manuscript, Archives, and Rare Book Library, Emory University: World War I stereographic library, 1918-1921; Keystone Lantern photographic slide collection, at the University of Maryland libraries
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.
Shows could be as simple as a single operator and two or three modified slideprojectors or overhead projectors and a couple of color wheels or as complex as shows with ten or more operators, 70 plus projectors (including liquid slide, liquid overhead, movie and still image models plus a vast array of highly advanced (for the time) special ...
The plant was once used to make copiers and overhead projectors, and the facilities have expanded to focus on the adhesive notepads since 1985. ... The Slinky, introduced by naval engineer Richard ...
Overhead projector and slide projector: Video projector: Primarily for continued use of older materials. Some teachers find the overhead projector more convenient for lectures depending on their teaching style. Phonograph and phonograph record: Audio cassette, 8 track tape, CD, digital audio: Used to play older or archived recordings.