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Thread: How should I choose a burning laser?

  1. #1
    Unenlightened
    Join Date
    May 2017
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    1

    Post How should I choose a burning laser?

    Hello, guys.
    I'm a rookie and understand the knowledge of the product is not much, now, i want to buy a cheap and true burning laser, I do not know how much the minimum power for green, blue or red laser to burn something, i want to buy a green burning laser, please give me some advice, thank you

  2. #2

    Default Re: How should I choose a burning laser?

    Please be extra careful, these things will burn your eye faster than you can blink. Don't have them in any household with kids around, they are too risky.
    Burning lasers will blind you just bouncing a reflection from a table top. You need to prepare for them like you would for any dangerous activity, get and wear proper gear, especially eye protection. High density welding goggles are a good thing unless you can afford frequency specific filters and lasers. ($$$)
    Burning lasers is a fuzzy term, even a modest size laser will pop a balloon or ignite a match, but they are not going to melt engines or cause siding to burst into flame.
    Military lasers that can do that are in the 100 kilowatt class and need an airplane to power them.
    Ordinary mortals can build/buy lasers in the 0-10 watt range and the laws require lasers to be labeled according to their power levels. Afaik, the US limit for lasers sold to consumers is under 10 milliwatt, but that surely has many loopholes and exceptions.
    I've been very pleased with a well priced (about $20) green laser pointer from Sanwu ( https://www.sanwulasers.org ), it runs on a standard 18650 rechargeable battery and is an effective pointer even in daylight. They offer more costly units, but I have no need of those.
    Note that this is merely a very high performance pointer, not a 'burning laser', although it certainly would pop a balloon. It still gives me enough concern that I always keep it locked and with the diffuser cap screwed on, because all it takes is one slip. These things are like loaded guns, waiting for the unwary.

  3. #3
    Unenlightened
    Join Date
    Sep 2017
    Posts
    1

    Default Re: How should I choose a burning laser?

    Quote Originally Posted by etudiant View Post
    Please be extra careful, these things will burn your eye faster than you can blink.
    What would you guess is the minimum milliwatt needed to wound but not kill a house fly or mosquito? I don't want to kill the fly outright for fear of burning stuff in the background or potential eye damage (although with a strong laser, I'd also invest in eye protection).

  4. #4

    Default Re: How should I choose a burning laser?

    Quote Originally Posted by kenneth_dart View Post
    What would you guess is the minimum milliwatt needed to wound but not kill a house fly or mosquito? I don't want to kill the fly outright for fear of burning stuff in the background or potential eye damage (although with a strong laser, I'd also invest in eye protection).
    I would not recommend using a laser for this, even with something lower power, it is too easy to get careless shining it around after an insect.

  5. #5

    Default Re: How should I choose a burning laser?

    Quote Originally Posted by kenneth_dart View Post
    What would you guess is the minimum milliwatt needed to wound but not kill a house fly or mosquito? I don't want to kill the fly outright for fear of burning stuff in the background or potential eye damage (although with a strong laser, I'd also invest in eye protection).
    Fly eyes are compound eyes, thousands of little units much like pixels in a camera sensor and even a very bright light won't blind them. Remember they have no eyelids, so they are adapted to seeing the sun directly all day long.
    So the task is really to burn them. That will take more than a 1 watt laser, which is instant retina burn for humans. Seeing the fly while wearing the needed welder goggles is difficult. Find a better method is my strong recommendation.

    The idea does work, I remember reading about a mosquito zapper that relied on laser pulses to fry the insects. I never saw the device, but presumably the beam only hit mosquitoes that flew into the trap, as the liability otherwise would be intolerable.

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