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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 .
The opaque projector, or episcope is a device which displays opaque materials by shining a bright lamp onto the object from above. The episcope must be distinguished from the diascope , which is a projector used for projecting images of transparent objects (such as films), and from the epidiascope , which is capable of projecting images of both ...
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.
The Magic Lantern Society maintains a list of active lanternists, which contains more than 20 performers in the U.K. and around eight performers in other parts of the world (Europe, U.S., Canada, Australia and New Zealand). [97] Dutch theatre group Lichtbende produces contemporary magical light spectacles and workshops with magic lanterns. [98]
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 .
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Projection (mathematics), any of several different types of geometrical mappings Projection (linear algebra), a linear transformation P from a vector space to itself such that P 2 = P
In the early days of film the word "photoplay" was quite commonly used for motion pictures. This illustrates how a movie can be thought of as a photographed play.Much of the production for a live-action movie is similar to that of a theatre play, with very similar contributions by actors, a theatre director/film director, producers, a set designer, lighting designer, costume designer, composer ...