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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 .
Kodak introduces the first 8 mm amateur motion picture film, cameras, and projectors. [16] 1934 – The 135 film cartridge is introduced, making 35 mm easy to use for photography. 1935 Becky Sharp, the first feature film made in the full-colour "three-strip" version of Technicolor, is released.
Overhead projectors were introduced into U.S. military training during World War II as early as 1940 and were quickly being taken up by tertiary educators, [14] and within the decade they were being used in corporations. [15] After the war they were used at schools like the U.S. Military Academy. [13] The journal Higher Education of April 1952 ...
Simulation of a spinning zoopraxiscope An early projector and seats from a movie theater. The main precursor to the movie projector was the magic lantern.In its most common setup it had a concave mirror behind a light source to help direct as much light as possible through a painted glass picture slide and a lens, out of the lantern onto a screen.
2004: First podcast, invented by Adam Curry and Dave Winer, is a program made available in digital format for download over the Internet and it usually features one or more recurring hosts engaged in a discussion about a particular topic or current event. [544] [545] [546] 2005: YouTube, the first popular video-streaming site, was founded
Victor offered many models of 16mm projectors, most with only minor variations, but prior to military contracts won during World War II, all were made and sold in very small numbers, from 20 units to usually no more than a couple of thousand units. The company was a large producer of lantern slides using their "Featherweight" method- a one ...
The slide images were too small for unaided viewing, and required enlargement by a projector or enlarging viewer. Photographic film slides and projectors have been replaced by image files on digital storage media shown on a projection screen by using a video projector , or displayed on a large-screen video monitor .
[67] [70] Kinemacolor projectors were installed in some 300 cinemas in Britain, and 54 dramatic films were produced. Four dramatic short films were made in Kinemacolor in the US in 1912–1913, [ 71 ] and one in Japan in 1914.