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projection a natural phenomenon, applied with lens since around 1550, portable box since early 17th century 730 BCE (circa) Lens: n/a burning glass? the function of the oldest known lens, the Nimrud lens, is unclear (it may only have been used for decoration), lenses were probably seldom used as a magnifying glass or as glasses before the 13th ...
By 1709 a German optician and glass grinder named Themme (or Temme) made moving lantern slides, including a carriage with rotating wheels, a cupid with a spinning wheel, a shooting gun, and falling bombs. Wheels were cut from the glass plate with a diamond and rotated by a thread that was spun around small brass wheels attached to the glass wheels.
The famous English pioneer of photographic motion studies Eadweard Muybridge built a phenakisticope projector for which he had his photographs rendered as contours on glass discs. The results were not always very scientific; he often edited his photographic sequences for aesthetic reasons and for the glass discs he sometimes even reworked ...
Because such systems are tied to a high speed video projector, the system's maximum resolution of unique angles is limited by the projector's maximum framerate. A similar system was commercially released in 1981 for the Entex Adventure Vision game console. The console, however, didn't aim for 3D visualization, but instead used the spinning ...
Neon lamps or light-emitting diodes are commonly used for low-intensity strobe applications. Neon lamps were more common before the development of solid-state electronics, but are being replaced by LEDs in most low-intensity strobe applications. Xenon flash lamps are used for medium- and high-intensity strobe applications. Sufficiently rapid or ...
An electric lamp shone up from beneath the film, casting its circular-format images onto the lens and thence through a peephole atop the cabinet. [20] The device incorporated a rapidly spinning shutter whose purpose—as described by Robinson in his discussion of the completed version—was to "permi[t] a flash of light so brief that [each ...
The 15 kW xenon short-arc lamp used in the IMAX projection system. A mercury arc lamp from a fluorescence microscope. A krypton long arc lamp (top) is shown above a xenon flashtube. The two lamps, used for laser pumping, are very different in the shape of the electrodes, in particular, the cathode (on the left). An arc lamp or arc light is a ...
A common application of the color wheel is to provide a color filter for a single-chip projector, which would otherwise only be able to display a greyscale image. The color wheel is placed in front of the light source (usually a metal-halide lamp) and spins rapidly, splitting the light into red, green, and blue primary colors. The chip then ...
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