Where is the best laser pointer for stars?
Laser pointers can be abused when they are directed at people or treated as toys. The light emitted by the green laser pointer sight aimed at the eye can be more destructive than looking directly at the sun. When a bright beam is aimed at car drivers, airplane pilots, or even people holding a cup of hot coffee, its unexpected effects can cause serious accidents. According to the Laser Institute of America, a woman reported how other mothers she knew bought laser pointers for their children so that they could imitate Luke Skywalker and Darth Vader in Star Wars. In some countries, these powerful laser pointers (especially those with higher motors) may be illegally owned or used. Therefore, after purchasing these products, you (the customer) shall bear all the responsibilities and obligations for determining and satisfying the requirements and restrictions for the use or resale of these products in accordance with the laws and regulations of your country/region. In the case of resale, you also agree to include this rating in the product description so that any potential buyer can also make an informed buying decision. Under normal circumstances, the 6mW laser is extremely unlikely to cause damage. Especially considering that almost all success will come from far away, or reflections that deflect the beam, double the distance, and reduce the laser power. In most accidents, the beam will diverge/diffract to such an extent that it does not even pose a danger. Most people use a laser beam to take images because the beam is exactly the same as the beam coming out of the camera. If you can reproduce the event, the beam may be different.
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For visible light beams, 5mW at night is sufficient, and about 35mW in a well-lit room. The 50mw laser has a highly visible green line at night, and under low light conditions, any green line above this appears very bright. I have a laser pointer in my house, which emits a green beam (wavelength of 532 nm). It uses two LR03 batteries. When these batteries were almost completely depleted, I noticed something: by looking at the pointer (the beam is no longer emitting), I can see a small light...red! Therefore, the green laser. The indicator has a red diode. In my green high powered laser, the initial red light does not exist: it is absorbed by the material, and the latter emits a "green" photon during the passage of the previous green photon. If I see a red diode when the rechargeable battery is dead, it is because the stimulated emission is no longer enough and no more rays are formed (for connoisseurs: there must be a population inversion between the ground state electrons and the excited electrons. If the battery is empty , The population inversion is no longer possible: the initial red photon emission is too slow).
2021-12-13 11:20:15
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