Time And Frequency Benchmark Focus Green Laser Pointer
The high-precision green laser pointer is not only of great significance in the fields of communications, securities, aviation, national defense, etc. As the most basic physical quantity, it also has a fundamental role in improving the national scientific research level. "The slightest difference in time will bring the error of thousands of miles. For example, when the spacecraft is docked, once the time difference is one millionth of a second, there will be a distance deviation of 300 meters." Zhang Shougang said. Therefore, the so-called high precision must be at least 100 billionths of a second accurate. For the accuracy of one hundredth of a second, Zhang Shougang has led the key laboratory of time-frequency benchmarking for many years, focusing on the generation and maintenance of high-precision time-frequency. Expand the quantum frequency standard, time-frequency measurement and control, time-frequency transmission, and punctuality The basic research on the application of green laser pointer in methods and methods such as time user system.
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The first criterion for judging time performance is the weight of the punctual laboratory's green laser pointer when it is calculated in international atomic time. The greater the weight, the more important this punctuality lab is. At present, there are more than 400 atomic clocks in the world. As a rule, the International Time Bureau calculates and publishes the international standard time every month based on the atomic clock data of various places. As one of the most important punctuality laboratories in the world, the time-frequency benchmark key green laser pointer laboratory contributes to the weight of international atomic time calculations in the forefront of the world. This shows that our atomic clock has high accuracy. The performance of time is quite good.
2020-02-18 03:44:18
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