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macscanfly
4.99mW Green Laser Toy


Joined: 01 Feb 2010
Posts: 9

PostPosted: 2/01/10, 10:19 PM    Post subject: need some Reply with quote

i bought a 50mw green laser without an IR filter does this mean its bad for my eyes when it reflects off something or even if im just shining it on the floor or wall?


one other thing is there anyway i could make sure or check if its really 50mw
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jatwood
Nexus Laser


Joined: 23 Dec 2009
Posts: 102

PostPosted: 2/04/10, 6:40 PM    Post subject: Reply with quote

A laser without an IR filter will produce IR radiation which can bounce off surfaces and go into your eye without your knowledge of it happening. Essentially it would be like shining the laser into your eye without you knowing about it. There are things you can buy online that measure a lasers power but if the laser you bought is a cheap laser without an IR filter it probably means that it isnt actually shining 50mw of green light.
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macscanfly
4.99mW Green Laser Toy


Joined: 01 Feb 2010
Posts: 9

PostPosted: 2/06/10, 1:17 AM    Post subject: Reply with quote

okay so your saying it will mess up my eyes if its a true 50mw? just on the floor or wall
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jatwood
Nexus Laser


Joined: 23 Dec 2009
Posts: 102

PostPosted: 2/07/10, 12:10 AM    Post subject: Reply with quote

im not saying it will, im saying you wont be able to tell if its hitting your eye or not. the invisible light it gives out can bounce just like the visible light. If that happens long enough then you will probably suffer some eye damage.
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leftkidney
Elite Laser


Joined: 21 Jul 2010
Posts: 141

PostPosted: 7/31/10, 6:24 AM    Post subject: Reply with quote

from what I understand, IR that comes out is unfocused and is in a "cone"shape so it defuses a lot after like 1 foot or so - maybe this is not as bad

but someone correct me if I am wrong (on that one and this one) but cant you just get a IR filter and cut it into a small thingie that you can put in your lens cap assuming you have a lens cap?
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proffski
Phoenix Laser


Joined: 30 Jul 2010
Posts: 81
Location: Gloucestershire UK

PostPosted: 8/20/10, 9:34 AM    Post subject: Reply with quote

Not worth taking risks with leaking I.R. radiation in any laser.

More on the subject here: http://www.elektor.com/news/caution-high-infrared-power-levels-from-gr een.1484315.lynkx
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etnie1031
Nexus Laser


Joined: 12 Jul 2010
Posts: 109

PostPosted: 8/20/10, 9:36 AM    Post subject: Reply with quote

on my cheap 50mw laser, the IR stays collimated with the laser beam pretty well, so i take the risk. I only bought it since im waiting for my laser. When I do get my laser, i probably won't be using my cheap one as much.
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malhombre
55mW Advanced Wicked Laser


Joined: 26 Jul 2010
Posts: 73
Location: Bama

PostPosted: 8/20/10, 10:37 AM    Post subject: Reply with quote

proffski, thanks for the link!
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