Goggle recommendations, 200mW, 660nm

[Boz]

Laser pointer: http://www.budgetgadgets.com/hlp181...00mw-p-5770.html?affiliate_banner_id=1&ref=26

Goggles I'm looking at: Laser Glasses - Red laser beam protection 600-740nm :: Laser Safety :: Dragon Lasers

Do you think these are suitable glasses for that kind of laser? I'm willing to shell out $50 max... If I must pay more for a pair of goggles, I'll just get a less powerful laser pointer.

 

[Boz]

bump.

 

[Machro]

Yeah I heard that dragonlaser goggles do their job well.
I have a 50mw red laser and I randomly found some goggles @ home that work perfectly.
I'M NOT SURE SO PLS CORRECT IF I'M WRONG but i think that nearly every green glass,plastic blocks 650nm...

 

[piferal]

For this power (200mW), with these goggles and for this wavelength, let pass only 0.02 mW.

Rest assured, is more than enough.

 

[Boz]

I'm really new to this, would you mind explaining to me why there is only 0.02 mW left? Because the goggles don't show how much mW it blocks

 

[piferal]

Ok, these glasses for this wavelength (621-740nm) are protection OD>4 (OD = Optical Density).

A type of goggles with protection OD4 for a one specific wavelength, only allowed to pass 0.01% of this wavelength.

OD>2 allowed to pass only 1%

OD>3 allowed to pass only 0.1%

OD>4 (in this case at this wavelength) allowed to pass only 0.01%

etc, etc....

the calculation is easy to do, 0.01% of 200mW = 0.02mW, this is what the glasses let pass.

That means it blocks 199.98mW of that wavelength.

I hope I explained well, my English is not very good