Country or region: United States
Subject: Inventor
Invention:
Simple calendar
Rand, Edwin Herbert, American inventor. 1909 was born on May 7th in Bridgeport, Connecticut. Rand studied at Harvard University. In the mid-1930s, when he was still studying, he put forward a very wonderful idea. It has long been known that light will be polarized when it passes through some organic crystals (such as Bartolin's Iceland spar). But it is difficult to find enough useful organic spar. Rand suddenly thought that if many small pieces of spar are arranged together in the same direction, it may be possible to replace large pieces of spar for polarization experiments. Therefore, Rand designed a series of experimental methods. He embeds SPAR in transparent plastic, so that SPAR can be arranged very neatly without dislocation. So there was the commercial name "polarizer". 1937, rand founded the commercial joint-stock company of polarizer. The polarizer soon replaced the Nicol prism used in the polarimeter. Polarizers can also be used as safety glasses and glasses, and are also suitable for avoiding dazzling sunlight (as Marius discovered a century ago, such reflected light is generally polarized). Rand dropped out of school to take up this profitable business venture. Rand never got a degree, but on the other hand, he got six honorary degrees. Since then, he has made several inventions, including a set of binocular observation devices that can produce three-dimensional effects. Rand also developed a new color photography system. The system can be composed of two colors (one of which can be white) to achieve full-color effect. This seems to need to modify Jan-Helmholtz's color vision theory, which suggests that panchromatic color can be composed of three primary colors. Rand's originality, the most outstanding achievement is the Rand polarized camera invented by 1947. This camera can get photos directly within a few seconds after pressing the shutter. The camera is equipped with a double film composed of negative and positive paper, and a packaged chemical liquid is placed between them. These chemical liquids can be precipitated in time and developed into positive films automatically.