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  2. 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

  3. Telop - Wikipedia

    en.wikipedia.org/wiki/Telop

    At the same time, Gray also developed a Telojector, a gun-turret style slide projector for 2 in × 2 in (51 mm × 51 mm) slides which had two projectors, facilitating easier lap dissolves between the two. The Telop III was introduced in 1954, was a refinement of the previous makes. Reduced to a single-channel version of the Telop, the Telop III ...

  4. Stereopticon - Wikipedia

    en.wikipedia.org/wiki/Stereopticon

    A stereopticon is a slide projector or relatively powerful "magic lantern", which has two lenses, usually one above the other, and has mainly been used to project photographic images. These devices date back to the mid 19th century, [ 1 ] and were a popular form of entertainment and education before the advent of moving pictures .

  5. 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 .

  6. Carousel slide projector - Wikipedia

    en.wikipedia.org/wiki/Carousel_slide_projector

    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.

  7. LCD projector - Wikipedia

    en.wikipedia.org/wiki/LCD_projector

    Liesegang LCD Projector. An LCD projector is a type of video projector for displaying video, images or computer data on a screen or other flat surface. It is a modern equivalent of the slide projector or overhead projector.