Sunday, 28 December 2014

Magic lantern


The Magic lantern is an early type of image projector project pictures on sheets of glass. It was developed in the 7th century and was commonly used for educational and entertainment purposes.

"The magic lantern used a concave mirror in back of a light source to direct as much of the light as possible through a small rectangular sheet of glass—a "lantern slide"—on which was the painted or photographic image to be projected, and onward into a lens at the front of the apparatus. The lens was adjusted to optimally focus the plane of the slide at the distance of the projection screen, which could be simply a white wall, and it therefore formed an enlarged image of the slide on the screen.
Apart from sunlight, the only light sources available at the time of invention in the 16th century were candles and oil lamps, which were very inefficient and produced very dim projected images. The invention of the Argand lamp in the 1790s helped to make the images brighter"

"http://en.wikipedia.org/wiki/Magic_lantern"

The creator the project was to be debated over time and was said to be Christiaan Huygens and was claimed to have developed the device in the late 1650's

Christiaan Huygens "was a prominent Dutch mathematician and scientist. He is known particularly as an astronomer,physicist, probabilist and horologist.
Huygens was a leading scientist of his time. His work included early telescopic studies of the rings of Saturn and the discovery of its moon Titan, the invention of the pendulum clock and other investigations in timekeeping. He published major studies of mechanics and optics, and a pioneer work on games of chance." 

"http://en.wikipedia.org/wiki/Christiaan_Huygens" 

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