Old 04-17-2016, 11:57 PM #1
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Default question on safety glasses and IR dangers..

Got a 5 w 450nm and ordered some cheap goggles which cover the wavelengths of like 405-450 nm , they are green coloured material. I have also removed the lens of my laser and although ima self described noob I didn't see anything in front of the diode that looked like a IR filter. Laser came from China and I can imagine it's unlikely it has an IR filter (unless it is inside the diode module where it isn't visible). Question is even if my glasses block 450nm waves but the laser lacks an IR FILTER will I be endangering my vision using only the 405-450nm goggles? Also is there a way to test if the laser has IR filter? I would appreciate greatly any insight by a qualified hobbies the. Thanks again, Derek


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Old 04-18-2016, 12:19 AM #2
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Default Re: question on safety glasses and IR dangers..

405-450nm lasers don't emit IR. Only 473nm, 589/593.5nm and 532nm do.
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Old 04-18-2016, 12:28 AM #3
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Default Re: question on safety glasses and IR dangers..

Quote:
Originally Posted by Razako View Post
405-450nm lasers don't emit IR. Only 473nm, 589/593.5nm and 532nm do.
Razako is correct, but I'd like to add that 473nm and 589/593.5nm manufacturers almost always install an IR filter. Because 532nm is very cheap, it tends to be the main culprit with IR leakage.

In addition, your laser probably is not 5W. It is more likely 1-2W being that it is from China and the 5W diodes are quite expensive.
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Old 04-18-2016, 12:36 AM #4
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Default Re: question on safety glasses and IR dangers..

Is it impossible that a Chinese company could produce a 5 w diode for cheap? Maybe they reverse engineered the high quality ones or something??
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Old 04-18-2016, 12:37 AM #5
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Default Re: question on safety glasses and IR dangers..

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Is it impossible that a Chinese company could produce a 5 w diode for cheap? Maybe they reverse engineered the high quality ones or something??
Where did you buy from and what was the cost?
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Old 04-18-2016, 12:39 AM #6
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Default Re: question on safety glasses and IR dangers..

Quote:
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Is it impossible that a Chinese company could produce a 5 w diode for cheap? Maybe they reverse engineered the high quality ones or something??
Short answer is no.
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Old 04-18-2016, 12:43 AM #7
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Default Re: question on safety glasses and IR dangers..

https://m.fasttech.com/p/3863104
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Old 04-18-2016, 12:47 AM #8
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Default Re: question on safety glasses and IR dangers..

Quote:
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Judging by the cost and the appearance of the diode it would seem that that laser uses an A-140 or an M-140 diode which would be 1 or 2 watts respectively. You should be glad that it is not 5W, as you should wait until you have more experience before you handle one of those.
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Old 04-18-2016, 12:47 AM #9
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Default Re: question on safety glasses and IR dangers..

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Probably in the 1-2W range. Still not bad for the price you paid. A REAL 5W laser will cost you $250-300+
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Old 04-18-2016, 12:49 AM #10
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Default Re: question on safety glasses and IR dangers..

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If you believe that, I've got a bridge to sell you.

You'll be lucky to get over 1.5W.
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Old 04-18-2016, 12:54 AM #11
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Default Re: question on safety glasses and IR dangers..

Based off your looking at the pics would u say the lenses is glass or acrylic
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Old 04-18-2016, 01:02 AM #12
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Default Re: question on safety glasses and IR dangers..

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Based off your looking at the pics would u say the lenses is glass or acrylic
Using an acrylic lens with a laser of this power would be a very bad idea. The lens would be melted quite quickly. It is almost certain to be glass.
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Old 04-18-2016, 01:07 AM #13
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Default Re: question on safety glasses and IR dangers..

Do you think the lenses is acrylic or glass from the pics u saw on the site
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Old 04-18-2016, 01:12 AM #14
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Default Re: question on safety glasses and IR dangers..

Quote:
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Do you think the lenses is acrylic or glass from the pics u saw on the site
I said already that the lens is almost certainly glass. It is difficult to determine from a single image whether the lens is acrylic or glass, but it looks to me to be a glass lens.
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