Learning to weld with a non-aircraft project

Ed Haywood wrote:
Don't know much about the science of it, but I know that the different types
of laser protective glasses that I've been issued in the military are not
dark at all. They are simple plastic safety glasses with a very light
colored, slightly reflective coating. I assume it employs some sort of
polarizing or refractory principle to disrupt the beam. We never carry
them.


LASER is special in that it is monochromatic, or one color. If you know
the type of laser, you can build a lens that will filter exactly one
wavelength. A dark lens takes the brute fore method of blocking everything.

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"Ignorance is mankinds normal state,
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