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808nm in fog vs 405nm in fog

zxn474l

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I have a fog machine but not a 405nm laser or a 808nm laser just 532nm and 650 nm which are both bright...I have seen video's on you tube with 405nm in fog to see the beam but never any 808nm with fog, is the 808nm visible in fog at all, or just the dot at the end when it shines on something? I have noticed that the more mw a laser is the more visible it is so would a 808nm laser that is 2 watts be visible in fog and would it be a dull red but still visible? I have seen where someone on here posted a question about drilling an Aixiz 5.6 mm housing to get a 9mm diode to fit in it...so that would work then? Also would the 9mm 2 watt diode be focusable with a glass lens that the red 650nm uses or does there exist a special lens to collimate this diode (808nm) in an Aixiz stock housing? If you can shed some light on these questions please be of help. THANK YOU.
 

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Any laser that has a visible beam, even barely, should be visible with a lot of fog. If you get enough fog, you can see the beam of a puny 1-5mw red pointer, so I'd think you would be able to see the beam from an 808. However, it would get pretty fat not far from the aperture and be harder to see due to the bad divergence. If I had an 808 of any power, I'd try it.
 

styropyro

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With a bunch of fog I'm sure it would be barely visible, it looks much cooler through an IR camera though!
 

Crossfire

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Any laser that has a visible beam, even barely, should be visible with a lot of fog. If you get enough fog, you can see the beam of a puny 1-5mw red pointer, so I'd think you would be able to see the beam from an 808. However, it would get pretty fat not far from the aperture and be harder to see due to the bad divergence. If I had an 808 of any power, I'd try it.
I have 700+mW of 808, just no fog machine...yet! I have to agree on the 808's bad divergence though.
 

Doofus

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You could just go get some Dry Ice from the hardware store and put it in water. Make your own fog (not as much) but enough that the beam should be visible.
 

billg519

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Just noticed this thread, so I fired up my fog machine and grabbed some IR 808nm handhelds. With the room light still on, the 2W beam shows quite well. The 1W was much less visible until I lowered the lighting in the room. I didn't take a photo simply because IR shows as a bluish gray in my video or still photos. Can't capture the 808nm deep red on camera properly.
 

diachi

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Yeah just a bit :D .

It was more scary not having any goggles though ;) . I DO NOT recommend using that kind of power WITHOUT goggles. But I had to test the laser and didn't have the time/money to buy goggles so I used a camera to see everything. If you decide to use those kind of powers without goggles then that's your choice.


Just in case anyone thought it was okay to use 1W lasers without goggles ;)
 




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