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  2. Overhead projector - Wikipedia

    en.wikipedia.org/wiki/Overhead_projector

    In contrast, a modern LCD or DLP projector often uses an Ultra-high-performance lamp which has a higher luminous efficacy and lasts for thousands of hours. [5] A drawback of that technology is the warm up time required for such lamps. Older overhead projectors used a tubular quartz bulb which was mounted above a bowl-shaped polished reflector.

  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 .

  4. Fractus Learning Launches Ultimate Classroom Guide to ...

    lite.aol.com/tech/story/0022/20241021/9259275.htm

    Fractus Learning has rolled out an updated guide to help educators choose the right classroom projectors for the 2024-25 school year. Wade Gegan, the author, put together reviews of twelve highly-rated projectors to help schools find the best match for their unique needs.

  5. 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 ...

  6. Photography - Wikipedia

    en.wikipedia.org/wiki/Photography

    This is an accepted version of this page This is the latest accepted revision, reviewed on 8 January 2025. Art and practice of creating images by recording light For other uses, see Photography (disambiguation). Photography of Sierra Nevada Photography is the art, application, and practice of creating images by recording light, either electronically by means of an image sensor, or chemically ...

  7. Samsung Freestyle: Everything We Know About This Smart ... - AOL

    www.aol.com/news/samsung-freestyle-everything...

    This year, we reported on the best gadgets of CES 2022, but if there was one device that really got our attention, it was the charming Samsung Freestyle — a home theater projector like no other.

  8. Video projector - Wikipedia

    en.wikipedia.org/wiki/Video_projector

    A projector in a standard form factor: The PG-D2870 projector from Sharp, which uses Digital Light Processing technology An image from a video projector in a home cinema. A video projector is an image projector that receives a video signal and projects the corresponding image onto a projection screen using a lens system.

  9. Slide projector - Wikipedia

    en.wikipedia.org/wiki/Slide_projector

    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 .

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