Hazards of 400 nm lasers?

Discussion in 'Laser Safety' started by GreenXenon, Oct 2, 2008.

  1. GreenXenon

    GreenXenon New Member

    Hi:

    What hazards -- other than thermal burns -- does a 400-nanometer-wavelength continuous [i.e. non-pulsed] laser of Class 4 intensity pose to human skin?

    As far as I know, 400 nm is the longest wavelength classified as "black light".

    Class 4 laser: http://en.wikipedia.org/wiki/Laser_safety#Class_4


    Thanks,

    Green Xenon
     
    GreenXenon, Oct 2, 2008
    #1
  2. aly

    aly Well-Known Member

    This is Near Ultraviolet light or UV-A.
    Almost everything about this and other types of UV light can be found here:
    http://en.wikipedia.org/wiki/Ultraviolet

    400nm laser class 4 is just a powerful and concentrated UV-A light. Take care of your skin and eyes.
     
    aly, Jun 15, 2009
    #2