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The first document camera, also known as a visualizer, was developed by WolfVision and Elmo and launched at the Photokina Trade Fair in 1988. [4] [5] The widespread use of computers, projectors, and popular presentation programs such as Microsoft PowerPoint in meeting rooms led to overhead projectors being used less frequently. [citation needed]
The company was renamed G.K. Elmo-sha (エルモ社, "Elmo & Co.") in 1933, an abbreviation for "Electricity Light Machine Organization". [2] The first 8mm projector (model Hayabusa) was released three years later, in 1936, [ 1 ] and the Elmoflex series of 6×6 TLR cameras was introduced in the early 1940s. [ 3 ]
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 .
Second, American shows were generally built around the overhead projector with the liquids in large clock cover glasses. Shows in England and Europe, in contrast, used modified 2" sq. slide projectors which had their dichroic heat filters (one or both) removed and employed two three or even four layers of slide cover glasses with one or two ...
This digital projector can even replace your TV, especially if you want to watch your favorite movies and TV shows up to 150 inches high on your wall. The picture is definitely bright enough to ...
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