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Two-color System
The two-color system of projection is a name given to a variety of methods of projecting a full-color image using (only) two different single-color projectors. James Clerk Maxwell first suggested he had discovered such a projection system, but it was not reproduced until the 1950s, when Edwin Land accidentally noticed a similar effect while working on his three-color system of projection. Despite Land's later work on the subject, the physics Physics is the natural science that studies matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge which r ... behind the success of this system of projection (and similar methods of apparent full-color projection involving only one color of light, sometimes in different polarizations) is not clearly understood since it involves not only the projected light but also the human visual system's response to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Movie Projector
A movie projector is an optics, opto-mechanics, mechanical device for displaying Film, motion picture film by projecting it onto a movie screen, screen. Most of the optical and mechanical elements, except for the illumination and sound devices, are present in movie cameras. Modern movie projectors are specially built video projectors. (see also digital cinema) Many projectors are specific to a particular film gauge and not all movie projectors are film projectors since the use of film is required. Predecessors The main precursor to the movie projector was the magic lantern. In its most common setup it had a concave mirror behind a light source to help direct as much light as possible through a painted glass picture slide and a lens, out of the lantern onto a screen. Simple mechanics to have the painted images moving were probably implemented since Christiaan Huygens introduced the apparatus around 1659. Initially candles and oil lamps were used, but other light sources, such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Clerk Maxwell
James Clerk Maxwell (13 June 1831 – 5 November 1879) was a Scottish mathematician and scientist responsible for the classical theory of electromagnetic radiation, which was the first theory to describe electricity, magnetism and light as different manifestations of the same phenomenon. Maxwell's equations for electromagnetism have been called the " second great unification in physics" where the first one had been realised by Isaac Newton. With the publication of "A Dynamical Theory of the Electromagnetic Field" in 1865, Maxwell demonstrated that electric and magnetic fields travel through space as waves moving at the speed of light. He proposed that light is an undulation in the same medium that is the cause of electric and magnetic phenomena. (This article accompanied an 8 December 1864 presentation by Maxwell to the Royal Society. His statement that "light and magnetism are affections of the same substance" is at page 499.) The unification of light and electrical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edwin Land
Edwin Herbert Land, ForMemRS, FRPS, Hon.MRI (May 7, 1909 – March 1, 1991) was an Russian-American scientist and inventor, best known as the co-founder of the Polaroid Corporation. He invented inexpensive filters for polarizing light, a practical system of in-camera instant photography, and the retinex theory of color vision, among other things. His Polaroid instant camera went on sale in late 1948 and made it possible for a picture to be taken and developed in 60 seconds or less. Life and career Edwin Land was born to Jewish parents in Bridgeport, Connecticut, to Matie () and Harry Land, a Russian scrap-metal dealer. Growing up, he was known to take apart household appliances, such as a mantel clock and the family's new gramophone, as well as blowing all the house's fuses when he was six years old. He was scolded by his father when taking apart a phonograph and he vowed that "nothing or nobody could stop me from carrying through the execution of an experiment" He ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Three-color System
''Sancai'' ()Vainker, 75 is a versatile type of decoration on Chinese pottery using glazes or slip, predominantly in the three colours of brown (or amber), green, and a creamy off-white. It is particularly associated with the Tang Dynasty (618–907) and its tomb figures, appearing around 700. Therefore, it is commonly referred to as Tang Sancai in Chinese. Tang sancai wares were sometimes referred in China and the West as ''egg-and-spinach'' by dealers, for their use of green, yellow, and white, especially when combined with a streaked effect. The Tang Dynasty three-color glazed pottery is the treasure of ancient Chinese ceramic firing techniques. It is a kind of low-temperature glazed pottery popular in the Tang Dynasty. The glaze has yellow, green, white, brown, blue, black and other colours. The yellow, green, and white colour-based are most predominant, so people call it "Tang Sancai." Because the Tang Sancai is unearthed in Luoyang earliest and is found the most in L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physics
Physics is the natural science that studies matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. "Physical science is that department of knowledge which relates to the order of nature, or, in other words, to the regular succession of events." Physics is one of the most fundamental scientific disciplines, with its main goal being to understand how the universe behaves. "Physics is one of the most fundamental of the sciences. Scientists of all disciplines use the ideas of physics, including chemists who study the structure of molecules, paleontologists who try to reconstruct how dinosaurs walked, and climatologists who study how human activities affect the atmosphere and oceans. Physics is also the foundation of all engineering and technology. No engineer could design a flat-screen TV, an interplanetary spacecraft, or even a better mousetrap without first understanding the basic laws of physic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
