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Old 10-26-2013, 04:12 AM #33
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Default Re: UV LED saftey concern

Sorry HD, but I'm not getting how that image supports your belief in any way?


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Old 10-29-2013, 11:08 PM #34
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Default Re: UV LED saftey concern

Doesn't that image show that anything 180-390nm is actually blocked by the cornea or lens of a "normal" eye so it is not very likely to harm your retina? I think that is all MagnaMagicBtu (HD) is suggesting. It might harm your cornea or lens of course. Also the OP stated the wavelength could be up to 400nm and it looks like some of that would get through, especially with younger eyes.

Also UV is "easier" to block because it is in the energy range of electronic energy transitions (like the transition to anti-bonding orbitals in ozone), as opposed to rotational, vibrational, or translational energy transitions. The number of potential (anti-bonding) orbitals gets quite high with even fairly simple molecules so there is bound to be one electronic transition that fits your photon once it has enough energy to interact with electronic energy levels. This is also why UV is more dangerous, you don't want your molecular bonds messed with.

I hope I remember my statistical mechanics and inorganic chemistry classes correctly.

Last edited by Asmodian; 10-29-2013 at 11:11 PM.
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