Laser pointers are often used for hiking activities
Many laser pointers are red and are so cheap to buy today because the diodes, including the mirror layer, are easy to evaporate and cut in mass production. Depending on the effort and requirements for light purity, there may be considerable differences in quality and price. Red light is good for the human eye, but it is far less perceptible than green light. Due to the high contrast with the light surface, the luminous red high powered laser pointer is of course very suitable for various presentations; the red laser pointer is also used for measurement purposes or various adjustments. The very low performance limit prescribed by the law is sufficient for these purposes, without any problems, and minimizing physical risks. As a comparison: an old light bulb provides about 50,000 times the power, but to a large extent it is not suitable as a luminous pointer. Imagine how many large batteries the flashlight uses and how short their duration is.
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The laser pointer can be used for hiking or outdoor activities. The brightness of higher power green laser pointer is enough to scare large wild animals, which makes them very suitable for hiking and camping. In these cases, the laser pointer can also be used as a practical survival tool, because it can be used as a rescue signal in emergency situations, in day and night conditions, at very long distances, aircraft and other parties are You can see this signal. For example, in the night of August 2010, after the rescue team found a red laser pointer, they rescued two men and a boy from the swamp and used the precisely aligned laser pointer as a laser rifle sight to aim the gun. The reporter learned that the visible laser laser pointer toy is designed as a portable pen toy. A common set of red, green, blue, purple and other lights. The laser pointer currently manufactured and used is 200mW. The General Administration of Quality Supervision, Inspection and Quarantine has "laser pointer, laser pointer". "Pen"-Firearms product quality, child safety risk warning and consumer reminder "Instructions not to buy high-power laser pointers that use laser pointers as toys for children to sell, sold when China announced the implementation of the "grading system" in China. The reporter visited and found that some companies Laser pointer toys are still on sale, but there are no graded packaging, labels, and warning signs.
2021-12-24 09:10:47
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