LaserFreak Forum
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- Mo 13 Okt, 2008 12:08 am
- Forum: Lasersafety
- Thema: Hazards of 400 nm lasers?
- Antworten: 2
- Zugriffe: 15332
Hi, 400nm is UV-A radiation and can go through the epidermis (upper skin layer) to the dermis. There it can cause short lasting changes of the skin colour, like tan. Much more dangerous is the fact, that UV-A may cause skin cancer by indirect DNA damage . But I think, with a Class 4 laser the risk ...
- Do 02 Okt, 2008 6:35 pm
- Forum: Components & materials
- Thema: Fusion-pumped laser emitting 400 nanometer light - possible?
- Antworten: 1
- Zugriffe: 19455
Fusion-pumped laser emitting 400 nanometer light - possible?
Hi: Is it physically-possible to design and build a 400 nm laser that is directly-"pumped" by aneutronic nuclear fusion and in which the active lasing medium/gain-medium is a rare-earth crystal? The "pump" is the part of the laser that excites the atoms in the laser medium. Hydrogen-Boron fusion is ...
- Do 02 Okt, 2008 6:31 pm
- Forum: Lasersafety
- Thema: Hazards of 400 nm lasers?
- Antworten: 2
- Zugriffe: 15332
Hazards of 400 nm lasers?
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...