Wireless presenter pen laser pointer with usb receiver
Although the US standard limits the visible light intensity of portable laser pointers to 5 milliwatts, even at this intensity, direct laser exposure to the eyes can still cause temporary flash blindness. If this happens repeatedly, or if someone is exposed to the laser without blinking or quickly looking away, you may cause permanent damage to your eyes. A green laser of 5000mW can be achieved, but it is usually not a pen shape. Some 5W 532nm/520nm lasers on the market sell for thousands of dollars. Therefore, they are usually used in professional fields such as scientific experiments, ultra-long-distance positioning, and airport bird control systems. If you need a 5000mW green laser pointer, it is very large and it is difficult to achieve the best stability. Before buying, you need to choose different power for different purposes.
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When astronomy enthusiasts use the high powered laser pointer to point to the stars, they need to pay attention not to use the star pointer frequently or for a long time, so as not to hinder others from seeing the stars and taking pictures. For astronomical purposes, the 5000mW green laser is very dangerous and may cause the plane to crash. To avoid accidental injury in crowded public places, you should stop using laser pointers. Some high-power products have strong thermal effects and cannot be used continuously for a long time, especially semiconductor lasers that are sensitive to temperature. High-output combustion lasers are indeed often used by the military. From our example above, the output power of the burning laser pointer (to signal the position of the enemy to the helicopter pilot) is often used. The 1000mW 980nm infrared laser is not only a thermal laser, but also an excellent military tool.
2021-12-13 11:39:38
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