The Development Level Is Far Behind The International Green Laser Pointer
At present, around the generation, maintenance and application of standard time. The National Time Service Center has formed a green laser pointer atomic clock-punctuality-time-time "discipline chain of time and frequency; and features time-signal-orbit Technology advantages of satellite navigation system research and development. Space technology, mapping, earthquake, transportation, communication and other industries and departments are receiving and applying time service from this "time team." High-performance atomic clocks are national strategic resources. Because Historical reasons. The development level of high-performance green laser pointers atomic clocks is far behind the international advanced level.
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Without its own atomic clock, it will be subject to others in the core technology of the time-frequency field. In 2004, after Zhang Shougang resigned from the Paris Observatory in France and returned to China, on the suggestion of the current President of the Chinese Academy of Sciences Bai Chunli, he gave up his original job in Shanghai, returned to his hometown of Shaanxi, and came to the only Chinese Academy of Sciences engaged in time-frequency science and technology research. The National Time Service Center has formed a scientific research team from scratch to concentrate on the development of high-performance atomic clocks. The National Time Service Center is zero-based in this respect. At the time, there was no cold atom research in the whole Xi'an area. But the new atomic clock I studied just needed cold atom technology. So it is conceivable that the green laser pointer is difficult.The duration of the green laser pointer will vary depending on the power output. The portable green laser can light up in 10 seconds at the official operating temperature (25°). If the working time is extended, the output power may be attenuated until it is not bright. Prolonged work can damage laser diodes and crystals, or even burn them out. Industrial collimating lasers can operate continuously 24 hours a day at room temperature with the correct cooling system. The part directed at the laser should be fixed during operation. Ordinary light travels through air at 300,000 meters per second. Lasers travel through the air at a speed of 300,000,000 meters per second. A laser travels through air three times as fast as a vacuum. Laser light travels through glass at 2/3 the speed of a vacuum.
2020-02-18 03:40:46
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