The client can require the appearance of laser pointer pen
Production and technological development needs to promote the scientists to explore new luminescence mechanism to generate new high performance light source. In 1958, Townes and sister Fu Ese ? Xiaoluo the maser and optical, spectroscopy combined theoretical knowledge, the paper introduces the open cavity of key recommendations, and to prevent the laser coherence, direction , line width, and noise properties. The same period, Basov and general Huoluo Fu, who also proposed to achieve light amplification by stimulated emission of radiation principles of the program. The client can require the appearance of green laser pointer .
Since then, many laboratories the world have been involved in the development of a fierce competition to see who can successfully build and operate the world's first laser. In 1960, the American physicist Theodore Maiman in Miami, Florida ? research laboratory, barely won the worldwide development of competition. He used to stimulate a high-strength flash tube inside the ruby crystal of chromium atoms, resulting in a considerable concentration of the thin red beam of light, when it is fired at a certain point, it can reach higher temperatures than the sun. The client can put forward some specific requirements for the body material of laser pointer pen .
"Maiman design" caused the scientific community's shock and suspicion, because scientists have been looking and looking forward to a helium-neon laser. Although Maiman introduced the first practical laser scientists in the field, but in court, on in the end who invented the technology debate, once aroused much controversy. One contender is the "Laser" ("stimulated emission type optical frequency amplifiers," the acronym) ? Gordon Gould, inventor of the term. He studied at Columbia University Ph.D. 1957, made the word. At the same time, the inventor of the maser Townes and Xiao Luo also developed the concept of the laser. Final decision by the court, Townes paperwork for research in Gould as early as 9 months to become the winner. The length of this kind of 100mW green laser pointer is 5.5cm.
But Maiman's invention of the laser power has not been shaken. December 1960, Iranian-born American scientist Jia Wan rate finally succeeded in making people and running the world's first gas laser - He-Ne laser. In 1962, there are three groups of researchers almost simultaneously invented the semiconductor laser. In 1966, scientists have developed into a range of wavelengths can be continuously adjusted in the organic dye laser. In addition, the output energy, high power, and do not rely on the grid of chemical lasers have come out. As with all the salient features of the laser, which was soon used in industry, agriculture, precision measurement and detection, communications and information processing, medical, military and other areas, and in many areas caused a revolutionary breakthrough. The diameter of red ray 200mW green Laser Pointer is 1cm.
Except for military laser communications, night vision, warning, and other aspects, ranging variety of laser weapons and laser-guided weapons has also been put into practical use. Laser as a heat source. Small laser beam, and with great power, such as the use of lens focus can be concentrated to a small area of energy on an enormous heat. For example, people use laser focus and high energy, a variety of materials can be processed, a needle can be drilled in 200 holes; laser on the body as a biological cause irritation, mutation, burning, evaporation and other effects means, in medicine, agriculture, practical application and achieved good results. The size of 50mW blue violet laser pointer can be customized.
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