Laser Pointer Science Fair Projects
The "laser pointer" is generally used for news reports, education and tour guides. The user uses it to project a light spot or a light spot directed at an object. From the point of view of its function, it does not belong to the category of toys. To buy children's green laser pointer and laser guns, you must choose regular channels. Please stop buying products without laser radiation category information, brand model or warning instructions. When consumers buy children's toy guns, they can check the outer packaging, try the product, or consult the sales staff to confirm whether the toy contains a laser. Consumers are advised not to buy toys with laser ignition or laser aiming functions for children. If you have purchased related products, please check carefully whether the laser radiation category is Class 1. We have seen how to use invisible or infrared laser beams, but what about visible colors like 532nm green? The short answer is yes. Use visible colors such as green, red, blue, or even purple/purple. For several key reasons, the most commonly used visible colors are green and red.
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First, the green laser of the same power is 5-7 times brighter than other colors. Therefore, you can get better visibility at the same power level and low power consumption. This allows more time for ground personnel to use the laser after a charge. This is essential for the successful completion of the mission or exercise. The 200mW green laser beam is 5 times brighter than the 200mW red laser beam and 7 times brighter than the 200mW purple laser beam. This is something the military should keep in mind when choosing the right model for any training or exercise in the real world. These high-efficiency lasers usually emit light in the green spectrum. Unlike red lasers, the green spectrum occurs at different wavelengths, including invisible infrared radiation. The shorter the green light wavelength, the more obvious the photothermal damage. In one study, 90% of green laser pointers tested with an output power greater than 5 mW, which is the threshold for "high power" lasers.
The output power of most high powered laser pointers is adjusted to 1 mW, which is relatively harmless in most cases. The radiation output of the tested laser causing damage ranges from less than 5 mW to more than 1000 mW. Many people now like to use the portable laser pointer as a toy. This kind of device is also often used in occasions such as speech. The US Food and Drug Administration (FDA) recently issued a warning through the MedWatch system that the laser light emitted by a handheld laser pointer may be harmful to the eyes. However, there are still many people who suffer eye damage due to the laser beam emitted by the laser pointer.
2021-12-13 11:39:55
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