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  2. Slide projector - Wikipedia

    en.wikipedia.org/wiki/Slide_projector

    A 1960 slide projector. A slide projector is an optical device for projecting enlarged images of photographic slides onto a screen.Many projectors have mechanical arrangements to show a series of slides loaded into a special tray sequentially.

  3. Epson - Wikipedia

    en.wikipedia.org/wiki/Epson

    Headquartered in Suwa, Nagano, Japan, [4] the company has numerous subsidiaries worldwide and manufactures inkjet, dot matrix, thermal and laser printers for consumer, business and industrial use, scanners, laptop and desktop computers, video projectors, watches, point of sale systems, robots and industrial automation equipment, semiconductor ...

  4. Projector - Wikipedia

    en.wikipedia.org/wiki/Projector

    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. A virtual retinal display, or retinal projector, is a projector that projects an image directly on the retina instead of using an external projection screen.

  5. Snell & Wilcox Zone Plate - Wikipedia

    en.wikipedia.org/wiki/Snell_&_Wilcox_Zone_Plate

    The Snell & Wilcox Test Chart #2 (or SW2) is used for general adjustments of video processors, mixing equipment, and display devices such as CRT TVs and projectors. Main features and tests allowed by the chart are: [12] [14] [3] Boundary markers (arrows for overscan check) Interlace check (black box with oblique white line)

  6. Overhead projector - Wikipedia

    en.wikipedia.org/wiki/Overhead_projector

    Overhead projectors normally include a manual focusing mechanism which raises and lowers the position of the focusing lens (including the folding mirror) in order to adjust the object distance (optical distance between the slide and the lens) to focus at the chosen image distance (distance to the projection screen) given the fixed focal length ...

  7. Slide cube projector - Wikipedia

    en.wikipedia.org/wiki/Slide_Cube_projector

    The Slide Cube Projector is a slide projector and system, manufactured and marketed by Bell & Howell, which was introduced in 1970 and marketed through the 1980s.The projector derived its name from its transparent cubical plastic slide storage magazine, approximately 5.5 cm (2.2 in) in each dimension (a bit larger than a standard 135 film slide mount), that held 36 to 44 slides, depending on ...

  8. Carousel slide projector - Wikipedia

    en.wikipedia.org/wiki/Carousel_slide_projector

    Less well-known but plentiful is a family of projectors based around a design originated by Sawyer's and later sold under other brand names. That manufacturer's first slide projectors, in the late 1950s, had used straight trays. In 1963, Sawyer's Rotomatic, the first version using circular trays (called Rototrays), was introduced.

  9. Video projector - Wikipedia

    en.wikipedia.org/wiki/Video_projector

    Video projectors can have a mechanism similar to local backlight dimming to achieve higher contrast ratios by using 6 DLP chips: 3 for display, and 3 for local dimming. [11] [12] A few camcorders have a built-in projector suitable to make a small projection; a few more powerful "pico projectors" are pocket-sized, and many projectors are portable.

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