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Laser glasses

Death Ray

New member
Hi guys, help me if im wrong,
Class I and II laser no need glasses = under 5mw.
Class III laser yes = over 5mw.

Now i know how to choose the wavelength, but i don't know how to choose the OD safety level, because i don't know how to compare the laser output and power to the right glasses... So i'm actually using this logic...

IF:
OD1 = 10^1 = it means that light is x10 times less bright.
OD2 = 10^2 = it means that light is x100 times less bright.
OD3 = 10^3 = it means that light is x1.000 times less bright.

So the goal is to keep the light power same as the light that can produce a simple laser pointer """"under 5mw!!!""". Because we can immagine that lasers under 5mw """no need glass protections""".

for exemple: 1.000 mw laser/1000 = 1mw. = It means that if i wear an OD3 glasses i can see the output as a simple 1mw laser pointer, and that should be enought, and it's not possible that if the bright is x1.000 times less it can still make you blind... I think that """with the right wavelength glasses""" the brightness is directly proportional to the output power.
right???

paul1598419

0
If you removed the decimal point in your example in the last paragraph then that would make more sense. A 1.0000000000 mW laser IS a 1 mW laser all by its lonesome. This type of question comes up so often there are threads with many posts that will answer any question you might have. Good luck.

RedCowboy

0
LPF Site Supporter
OD 0.0 = 100% Transmittance
OD 1.0 = 10% Transmittance
OD 2.0 = 1% Transmittance
OD 3.0 = 0.1% Transmittance
OD 4.0 = 0.01% Transmittance
OD 5.0 = 0.001% Transmittance
OD 6.0 = 0.0001% Transmittance

Note : Make sure you look at the coverage graph for your glasses.

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