Semiconductor laser technology gradually matures
Most of the current green, red, and blue laser pointers are small in size, but expensive. The 50mw high power laser pointer is relatively easy to make, with a wavelength of about 532 nanometers, mature technology, and precise semiconductor process materials. The wavelength of the red laser is also 600 nanometers. This is because the current ribbon semiconductor laser technology is not very mature, so the red laser pointer is expensive and low in power. In general, the difference lies in the process, power (brightness), and color of laser pointers of different colors. The common colors of wavelength laser pointers are red light (650-660nm), green light (532nm), blue light (445-450nm) and violet light (405nm). The red laser pointer can be used indoors or under low-light conditions, providing details on some inconvenient hands. The green laser pointer can also be used outdoors during the day or long distances. Wild tourists can use it to indicate distant destinations, and if they are in danger, use it to signal distress. On construction sites, buildings can be used to indicate distance.
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The super laser pointer can set off fireworks, making it easier to burn balloons. After buying a "strong laser" online, a set of comparative experiments found that the laser pointer cigarette claims. Moreover, if the laser pointer beam does not pay attention to the surface of the human skin, it will produce a burning sensation. Obviously, the green laser pointer is not suitable as a "toy". The unit for measuring the laser pointer in watts is three milliwatts (ie 0.003 watts), and there is a power of 100,200,300,500 milliwatts, and some laser pointers can reach 10 watts. The price of these laser pointers is low, the cheapest can reach ten Euros, and the most expensive can reach hundreds of Euros. When the output power is greater than 0.4 mW, this direct laser irradiation cannot be seen by the eyes. When the output power is three, it is easy to cause damage to human eyes. In addition, if the driver of the vehicle irradiates the laser pointer with a briefcase of the sighted person, accidents are likely to occur.
2022-01-07 10:12:55
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