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2. Overhead projector - Wikipedia

   en.wikipedia.org/wiki/Overhead_projector

   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.

3. Projector - Wikipedia

   en.wikipedia.org/wiki/Projector

   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 .

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5. Enlarger - Wikipedia

   en.wikipedia.org/wiki/Enlarger

   In the 1870s hand-coloured enlargements from carte-de-visite prints and daguerreotypes as well as existing negatives were offered for sale in London, England for two shillings for an A4 print, and three pounds for a life size bust. R. L. Elliot & Company, of King's Road could print up to 25" x 20" from quarter plate negatives in 1878 using ...

6. Slide projector - Wikipedia

   en.wikipedia.org/wiki/Slide_projector

   Slide projector light generation and collimation system: from left to right, mirror / reflector, bulb, condenser lens 1, green-tinted heat-absorbing glass, condenser lens 2; a centrifugal fan, used to cool the bulb, is visible at the top of the picture. A projector has three main optical elements: [3]: 39–40

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   The post Prime Day projector deals 2022: XGIMI Horizon, Elfin, & more on sale appeared first on BGR. There are tons of phenomenal TV deals available right now, especially if you’re looking for a ...

8. LCD projector - Wikipedia

   en.wikipedia.org/wiki/LCD_projector

   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 ...

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   AOL latest headlines, entertainment, sports, articles for business, health and world news.