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Old 06-03-2012, 02:19 PM #1
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Default Can I use 445 nm goggles for 405 nm lasers?

I have a 445 nm goggles from wicked lasers and will soon get a 405 nm diode.
My initial thought is that 445 goggles should be working with 405 lasers. This was true until I saw wicked lasers selling goggles that are made for either 405 or 445. (Separately) I know they might do that to get more money but I can't trust that thought.


Then I tried searching but all I found is this video that I can't either trust
Wicked Lasers 445nm Safety Goggle Test - YouTube


The guy basically shoots a 700 mW 405 nm laser through a 445 nm goggles and the LPM shows 15 mW.

Do I need to buy 405 nm goggles or is the 445 goggles enough?


Thanks!



Last edited by Jaximus; 06-03-2012 at 02:21 PM.
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Old 06-03-2012, 05:59 PM #2
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Default Re: Can I use 445 nm goggles for 405 nm lasers?

General rule is that if you have laser with X wavelength , googles with X+ s (where s is no more than 50) will be good. But it doesn't work backwards, for example if you have 808nm laser you can't use 650nm googles.

Last edited by btc5; 06-03-2012 at 06:01 PM.
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Old 06-03-2012, 06:02 PM #3
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Default Re: Can I use 445 nm goggles for 405 nm lasers?

Apparently most things from Wicked lasers arent that good.....If your goggles are the same as the ones shown in the video I would definitely suggest you get a certified pair!

I would suggest eagle pair. You can find them here: Survival Laser Home

Alternatively you could try these, but please note these are not certified only tested:
Cheap Safety Glasses - TESTED
Good luck
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100mW 405 PHR
700mW 405

2W 445 C6--link--
+2.3W 445 --link--
+2.5W 445 --link--

190mW 450 --link--
15mW 510nm
5mW 532 --link--
25mW 532 --link--

520mW 638 --link--
1W 638

250mW 650
250mW 780

3000 Lm C8 MTG2 @ 6 A!
Poppas mod 3A --link--
Sipik 98 Cu pill/star mod --link--
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Old 06-03-2012, 06:07 PM #4
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Default Re: Can I use 445 nm goggles for 405 nm lasers?

Quote:
Originally Posted by btc5 View Post
General rule is that if you have laser with X wavelength , googles with X+ s (where s is no more than 50) will be good. But it doesn't work backwards, for example if you have 808nm laser you can't use 650nm googles.
Nope! I wouldnt use that rule it all depends on the dyes used in the plastics, their respective absorption spectra and extinction co-efficients. As the dyes used vary widely, so do their absorption spectra. You need to look at the OD vs wavelength graph that the manufacturer supplies or should supply with the goggles.

Edit: Sorry for double post!
__________________
New to lasers & want some info on how to build a laser? Look here: Build a laser

Need info on goggles? Look here: Get safety goggles now!

FS Custom Sinner Host builds available now!


Here is my old Kryton Groove FS thread!

100mW 405 PHR
700mW 405

2W 445 C6--link--
+2.3W 445 --link--
+2.5W 445 --link--

190mW 450 --link--
15mW 510nm
5mW 532 --link--
25mW 532 --link--

520mW 638 --link--
1W 638

250mW 650
250mW 780

3000 Lm C8 MTG2 @ 6 A!
Poppas mod 3A --link--
Sipik 98 Cu pill/star mod --link--

Last edited by grainde; 06-03-2012 at 06:09 PM.
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