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  1. D

    4W laser without optics

    Is the reflection of a 4W laser without optics as dangerous to my eyes like the reflection with lenses? I have googles but I need to be sure
  2. D

    Paralele beams on the same spot or converging beams for a projector

    I want to build a projector with multiple lasers, but creating a knife edge array is not that simple. If the beams converge on the first mirror and are not parallel, I assume that they will create different patterns for each laser at an angle
  3. D

    Is a PC 450W PSU good for powering drivers?

    I got 450w PC PSU is it safe to use it to power laser drivers?
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    Is an unfocused 4W laser do dangerous at 5 meters?

    I will buy a 4w laser, I want to know if the laser will be unfocused and have a spread of around 20cmx20cm(8"x8") at a distance of 5 meters. Will it be dangerous if it will hit the eyes?
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    New and hungry

    Hello I always wanted to play with lasers and now my dream is coming true. So I will ask all the possible question about lasers that I can think of before I buy my first laser. The first question will be about the danger of an unfocused 4W laser at around 5 meters distance




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