IR filter my 532nm?

Cons: less total output power, though IR contributes zero to visibility of beam. requires special safety glasses blocking both 532nm and IR light

Pros: high % of exiting light will be 532nm. only safety glasses blocking 532nm light are needed

either way you would not want a direct hit to the eye.

most here will say get one.

Shakenawake said:

Cons: less total output power, though IR contributes zero to visibility of beam. requires special safety glasses blocking both 532nm and IR light

Pros: high % of exiting light will be 532nm. only safety glasses blocking 532nm light are needed

either way you would not want a direct hit to the eye.

most here will say get one.

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So you have less power for burning, but you still can't get hit in the eye with or without it. I don't see the point or why it'd be recommended, then.

the safety glasses are the main reason. look at the price difference:

Ones blocking both:Eagle Pair® 190-540nm & 800-2000nm Laser Safety Goggles

Ones blocking only 190nm-540nm: Eagle Pair® 190-540nm Standard Laser Safety Goggles

You should check if it's already ir filtered. Most high quality lasers that are DPSS are filtered, and seeing as yours is going to be ~300mW in a GB which i think would be good quality lasers it may already be filtered...

NKO29 said:

You should check if it's already ir filtered. Most high quality lasers that are DPSS are filtered, and seeing as yours is going to be ~300mW in a GB which i think would be good quality lasers it may already be filtered...

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Nahh, it's from laserbtb.com, where IR filters are optional for an additional $1.68 I think it is.

Shakenawake said:

the safety glasses are the main reason. look at the price difference:

Ones blocking both:Eagle Pair® 190-540nm & 800-2000nm Laser Safety Goggles

Ones blocking only 190nm-540nm: Eagle Pair® 190-540nm Standard Laser Safety Goggles

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Because I plan to buy LOTS of lasers throughout my time with this hobby, I probably want the more expensive glasses anyways. However, I can see where to someone only buying 1 laser, an IR filter for $2 is smarter than a whole new pair of glasses for $25 extra.

Thanks for the quick and helpful response!

No problem, remember that only DPSS lasers without IR filters would need the special glasses. as others stated most high quality companies do include the IR filter. If you ever get a pure IR laser, (most here are not interested by those, and question the motives of those who are) the glasses will obviously work for it too. Some common DPSS wavelengths: 473nm, 532nm, 589nm, 594.5nm, and 671nm. note that the glasses I linked to would be useless for the yellow and red light of the last three wavelengths

the reason IR is so dangerous is because you can't detect it, so your iris doesnt contract to limit incoming light when it's IR. this danger is somewhat negated in 532nm lasers as you can see the 532 light and it will provoke a response from your iris. like I said, either way, a direct hit will mess your eyes up

Best advice, get the IR filter !

Get the filter. Most glasses will block the green, but not the IR, so even if you get hit in the eye while wearing goggles, an unfiltered beam could still do damage, Also, it doesn't make the beam brighter, and there most likely wont be enough IR coming out of a 300mW green to add to the burning power.

crazyspaz said:

Get the filter. Most glasses will block the green, but not the IR, so even if you get hit in the eye while wearing goggles, an unfiltered beam could still do damage, Also, it doesn't make the beam brighter, and there most likely wont be enough IR coming out of a 300mW green to add to the burning power.

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Alrighty, thanks!