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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.
In the early 1980s–1990s, overhead projectors were used as part of a classroom computer display/projection system. A liquid-crystal panel mounted in a plastic frame was placed on top of the overhead projector and connected to the video output of the computer, often splitting off the normal monitor output.
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.
1974: The lithium-ion battery is invented by M. Stanley Whittingham, and further developed in the 1980s and 1990s by John B. Goodenough, Rachid Yazami and Akira Yoshino. It has impacted modern consumer electronics and electric vehicles. [508] 1974: The Rubik's cube is invented by Ernő Rubik which went on to be the best selling puzzle ever. [509]
Alarm Clocks. 725-2008 Prior to the year 725, no one was ever on time for anything. But that year in China, Yi Xing invented the first known alarm clock, and the descendants of his contraption ...
A carousel slide projector. The example pictured is a Kodak Carousel model 4400, dating from the mid-1980s. A carousel slide projector is a slide projector that uses a rotary tray to store slides, used to project slide photographs and to create slideshows. It was first patented on May 11, 1965, by David E. Hansen of Fairport, New York.
The firm made products for the motion picture industry. The Bell & Howell 2709 was the first all metal, commercially available motion picture camera. [ 2 ] The 2709 was so expensive that only Charlie Chaplin and three other people owned one, [ 3 ] while the rest were owned by studios.