Consumers generally use laser pointers
Green lasers are very popular these days, especially by astronomers and astronomers. The green laser emits a light beam with a wavelength of 532 nanometers, and the measured value of the red laser beam is 630 nanometers. According to a test conducted by the National Institute of Standards and Technology (NIST) in 2013, if 44% of the green and red laser beams tested (122 laser tests in total) do not meet federal safety standards, about 90%. What's more worrying is that nearly half of the test pointers emit light beams that are twice the limit set by federal regulations.
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As you may know, green high powered laser pointer are much more powerful and are generally classified as Class 3a lasers in the United States because they measure less than 5 milliwatts. However, please pay attention to label permissions. Laser is another major development in the 20th century after atomic energy, computers, semiconductors, and human beings. It is called "the fastest knife", "the most standard foot", "the brightest light" and "singular laser". The brightness is about 10 billion times that of the sun. Laser has a very obvious characteristic: directional light, high brightness, very pure color, high energy, etc. At present, it is widely used in various aspects of life such as industry and medical treatment. Laser pointer is a product that laser enthusiasts particularly love, especially for its high brightness and high energy characteristics. Consumers will use astronomical stars, funny cats, burning some combustibles and other entertainment purposes.
2021-11-30 11:54:08
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