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FrozenGate by Avery

how bad is ir from a cheap laser

E

Edd

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i bought a cheap green 100mw laser from the hong kong markets and i want to know how dangerous the ir from it is. i don't really want to put a filter on there because it would reduce power. if the beam accidentally hits my in the eye thru laser goggles, is it going to cause permanent damage. if it is all probably just put a filter on anyway.

thanks

(i found it online also Aliexpress.com : Buy BX4 S 1000mw 2000mw 450nm Adjustable Focus BURNING Blue Laser Pointer / Burn matches Light cigarettes Pop balloons&firecrackers from Reliable cigarette lighter suppliers on Shadowlaser Electronics Tech Co., Ltd.)
 





Most good safety goggles that block green also block ir. Where did you get yours?

Even if your goggles do block ir, it still should be filtered. Or you could upgrade.

That site is bad, there is much better.
 
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Those goggles are not actual laser safety goggles. They do not have an OD rating.

These would work: EaglePair

The power drop from filtering will vary. It shouldn't affect the visible green at all, but if there is alot of ir leakage, you might notice less buring power. If that is the case, you defiantly need better goggles. The ones you linked are targeted more at one wavelength, if that can even be trusted.
 
True, they do technically will work as "better than nothing". Did you read the final verdict?

True to their name, these are a "better than nothing" pair of glasses. I still recommend getting a high quality pair when money allows it, but these will prevent or significantly reduce eye damage if hit in the eye. And for $8 a piece, if anything, order them as "spectator" glasses.

I wouldn't trust my only set of eyeballs to them. The ones I linked will protect both ir and green. If you did filter the ir (the laser from that article was filtered, btw) then they would be ok for that laser, but if you really get into lasers, definitely upgrade those goggles.
 
I wouldn't trust them to block IR or even the green, they do do a very good job at blocking light in the 445nm range though, but that is about it.
 
ill probably stick with these goggles for now at least or until i get a more powerful laser, do you know where reliable ir filters are sold?
 
Here, to give you an idea of how much of the power comes from the infrared spectrum and to show you how much you really do need goggles or at least something to stop that IR.
 
Edd said:
ill probably stick with these goggles for now at least or until i get a more powerful laser, do you know where reliable ir filters are sold?
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why not just buy a green with ir filter from like laserbtb ? if u want a good cheap laser i dont see why not, the laser u have is all junk, probably tons of ir leakage.. nothx.
 
I have one of those same Uvex safety glasses and they block UV according to the manufacturer, and are very effective with 405nm and 445nm, but they are a little weak on the green so don't trust them except with UV up through 450nm.

Alan
 
mortuus said:
why not just buy a green with ir filter from like laserbtb ? if u want a good cheap laser i dont see why not, the laser u have is all junk, probably tons of ir leakage.. nothx.
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i would but i live in australia and the only way i can get lasers is smuggling them in myself
 
Pi R Squared said:
I have one of those same Uvex safety glasses and they block UV according to the manufacturer, and are very effective with 405nm and 445nm, but they are a little weak on the green so don't trust them except with UV up through 450nm.

Alan
Click to expand...

thanks for the info, do you know of any glasses like them that work with green lasers (cheap ones)
 
To be honest if you are getting into lasers $ 40 for a pair of Eagle Pair, which will block 405, 445, 520, 532 and IR (808 and 1064), is not very much. Most lasers here cost in excess of $ 100, so if you are unwilling spend $ 40 on a pair of goggles perhaps you have the wrong hobby...
 
I use IR filters regularly on my 532nm laser builds. The IR component is about 20% from my measurements, and it is not wildly all over the place either. If you don't get the green laser light in your eyes, then you are most likely safe with the IR component, too. I build and focus IR lasers using an IR camera and though the beam is more diffuse than the green beam, it is hardly larger than the size of a Quarter at 4 meters. If you are careful with your lasers in the first place, then you will be okay with any unseen and "spooky" invisible light as well.
 
I would hope all of us are careful with lasers. However, there are those times were careful is not enough, and that's were safety glasses come in.
 
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