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I bought a laser pointer, bought from the Internet, I asked how far it can shine, he said eight kilometers, but I don’t have the photos so far to think, the ground near the sky plane, I experiment a little, actually doesn’t seem live, may I ask how you can test a number of Rechargeable Laser Pointer to shine far?

Standard 100MW laser pointer can ignite games. Typically laser pointer over the label is not real power, companies will often put high label on a low power laser pointer to increase the price. Real high power laser pointer can test it by the power meter. The finest laser pointer at the shot is most concentrated in the beam energy, so the games in this position are most likely to point forward.

Ordinary do indication blue laser pointer, ballpoint pen or stall on the green, the price of 100 yuan. Children do not use the laser pointer. There is more power in green, red, blue and the like. The prices vary with the size of the performance steps and differently. 100 to several thousand.

Easy and intuitive to say that the laser beam has such a high cohesive energy. 100mW output power of the 500mw red laser pointer is, 100 MW power is concentrated in a few mm² area power. Think of 0.1 joules of energy per second on such a small area of ​​10e-6m² heating, the energy density is very high. Natural make is rapid rise in temperature of the radiation spot to achieve a burning effect. And some laser flashlight has function that allows the parallel light beam emitted converging spot to be concentrated on a smaller area, focusing, burning effect further improved. But even so, if you want to burn out fabric, wood, plastic or something, the more popular 200mW power lasers must also need at least a few seconds of continuous irradiation in the same place again and encountered the same white or color laser materials more. So there is no wounding meaning.

This is how you can find laser pointers on the Internet

Of course the green 1000mw laser pointer increases with distance attenuation bad, so now the market even the most powerful 1000mw445nm laser blue laser flashlight at 2m buy basically everything outside of the burned anymore.But even without a high-power laser (50 mW or more) laser pointer can also damage the eyes on the opposite greater distances (as the imaging principle of the eye, the eye lens is used to capture the light convergence on the retinal imaging, and this convergence is more powerful, in capable of being fired in the eyes of an enlarged times the energy density of the laser beam projected onto the retina as soon as retinal damage) – so whichever laser pointer burns, the laser eye injury is cause for concern.

Laser pointer

Yesterday, members of the public Schilling told reporters to reflect, to the children some time ago, bought a new laser pointer toy, did not think a few days later, said the boy could not see anything to the hospital before we know is one blame laser pointer blue.”Laser pointers in the market for selling children’s toys, if used improperly, can damage your eyes.” Ms. Lee said ophthalmologists, eyes after being irradiated with a laser beam, eye tissues absorb the laser light after rapid temperature rise occur tissue necrosis, resulting in loss of cell function. Especially children, sensitive eye tissue, as soon as the laser beam reaches the retinal macula, would cause serious eye damage if after a long exposure time, and even lead to blindness.

Reporters learned that the visible blue laser pointer toy is designed as a portable pen toy, a common set of red, green, blue and purple lights, etc. Currently the manufacture and use of a laser pointer 200mW, AQSIQ has “laser pointer, laser -Gun product quality child safety risk warnings and consumer tips “indicating do not buy to use a laser pointer as a toy for children to sell high-power laser pointers to sell, China issued China’s implementation of the” grading system “at the time of sale. Reporters visited found that some companies are still in the sale of laser pens toys, but no level packaging and labeling, warning signs.

Tags: blue laser pointer, Green laser pointer, red laser pointer, Yellow laser pointer