Word: electronic
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...bulky picture or cathode-ray tubes used in conventional TV sets, a beam of electrons originates in the stem of the tube and sweeps rapidly to and fro across the tube face. Its intensity is controlled by the signal from the TV station. As the beam hits dots of phosphorescent material in the tube face, they glow with a brightness proportional to the strength of the beam. This rapid action produces at least 25 still pictures per second on the screen, creating the illusion of moving images. In the new Westinghouse system, the images are also formed by producing glowing...
Prior to that time, cells were still largely scientific terra incognita. By using the electron microscope, which had recently been developed, Claude taught scientists to explore these miniature worlds and to map them. He also developed techniques for separating cell components in a centrifuge in order to help determine their functions...
...scientist at Canada's Ontario Research Foundation has found a convenient way to overcome the microscope's handicap; Physicist Eric J. Chatfield has devised an adapter system that enables the electron-microscope user to get three-dimensional images. His optical stereo, which he developed at a cost of only $25,000-less than the price of a typical electron-microscope-operates on an ingenious yet simple principle reminiscent of Hollywood's experiments with 3-D movies in the 1950s...
...obtain the two views that are necessary to create a three-dimensional picture, Chatfield added an extra magnetic coil to the electron microscope. The coil deflects the microscope's electron beam as it scans a target so that the microscope actually looks at the same object from two different angles. The separate images are fed into an ordinary color-TV set, which displays one view in red and the other in green; the set's blue circuitry, ordinarily needed to give the viewer a full spectrum of colors, is disconnected. When a viewer looks at the screen while...
...stereo system is so effective that the Canadian subsidiary of Britain's Cambridge Instruments Ltd., the world's leading manufacturer of scanning electron microscopes, plans to market the Chatfield 3-D adapter in the near future for about $6,500 (the microscopes themselves run from $40,000 to $80,000). Chatfield's new technique might even be based on a bigger scale-as the basis for 3-D television...