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1960年发明的激光,所以有那么多的用途,在于它的三个神奇的特点。 第一个特点是激光的单色性好。我们通常看到的可见光,波长为0.4至0.76微米。阳光表面上是白色,实际上是由红、橙、黄、绿、青、蓝、紫等多种颜色的光按一定强度比例混合而成。就是平常所见到的单色光,也含有一定波长范围,如0.63至0.76微米的波长,都是红色光。 然而,一般激光波长范围只有万分之儿微米,这就已经比普通阳光单色性好上千倍。单色性好的氦-氖激光,其波长范围更能缩小到千亿分之几微米。波
The laser invented in 1960, so there are so many uses, lies in its three magical features. The first feature is the monochromatic laser good. The visible light we normally see, with a wavelength of 0.4 to 0.76 microns. The sun is white on the surface, in fact, by the red, orange, yellow, green, blue, purple and other colors of light by a certain percentage of the intensity of mixing. Is usually seen monochromatic light, but also contains a certain wavelength range, such as 0.63 to 0.76 micron wavelength, are red light. However, the general laser wavelength range is only a few tenths of microns, which is already thousands of times better than normal sunlight monochromaticity. Monochromatic good helium-neon laser, its wavelength range can be reduced to a few thousandths of micrometers. wave