Old 08-03-2016, 12:51 PM #1
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Default Eye protection

I have purchased a 3.3 watt 445nm laser and I need adequate eye protection that won't break the bank I have some glasses already but the at only somewhere between 4.0 and 5.0 OD and I know that's not enough any help is greatly appreciated



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Old 08-03-2016, 01:04 PM #2
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Default Re: Eye protection

If your current safety glasses are actually between 4 and 5 OD, they will be sufficient for a 3.3W laser. Be sure they are rated for your 445nm wavelength!
I'm not sure what yohr budget is, but I wouldn't go with any thing less than something like these from Survival Lasers.

If your glasses protect at an OD of 4, your 3.3W laser should be reduced to 0.33mW.
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Last edited by BowtieGuy; 08-03-2016 at 01:09 PM.
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Old 08-03-2016, 01:07 PM #3
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Default Re: Eye protection

They are for the correct wavelength is there any way to actually test them?
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Old 08-03-2016, 01:18 PM #4
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Default Re: Eye protection

If your not sure of your glasses quality, I'd get a certified pair so that you know they will protect you.
I've added a link to my previous post, for some quality safety glasses at a decent price.
The only way I know of to be sure of yours, would be with an actual (destructive) test with a laser of known output and an LPM (laser power meter).

Here is a link to a thread that shows some actual destructive testing of some safety glasses.
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405nm Custom JETLASERS Ti-B (1.08W)

445nm Build "Ole Blue" (2.8W+)
445nm 1.3W JETLASERS PL-E (1.5W)

450nm Custom JETLASERS Ti-B (327mW)
462nm Solarforce T2 (2.1W)-link-
465nm 1.4mW JETLASERS Mini (1.64mW)
467nm "Maraxus" (2.3W)
515nm 30mW Ehgemus titanium (84mW)
520nm S/S build (250mW) •50mW JETLASERS Ti-B (73mW)
520nm Ehgemus Custom (1.45W) •Coleman Jr. (234mW)
-link-
532nm 1.5W Goldenstar lab (3W)
532nm 500mW JETLASERS PL-E (754mW)
532nm 100mW JETLASERS Ti-B (161mW)
532nm 5mW "Eclipse" mints tin (54mW)

589nm 80mW CNI PGL-III-C (154mW)
589nm 50mW Dragonlasers Spartan (124mW)

594nm L/G Rigel-6 "LPF Anniv. Ed." (6.7mW)
635nm 20mW JETLASERS Ti (30mW)
638nm Custom JETLASERS Ti-B (232mW)-link-
638nm "Coleman Special" (260mW)
638nm Build in sinner's "MS-SSW Stubby" (1.25W)
650nm W/L E2 (89mW) • Laserbtb PL-650 1000 (1W)
660nm S/S Build (383mW)
674nm 501B/Melles Griot u/k Build 20mW

LK-3D Projector

5W Ophir/dmm LPM

Last edited by BowtieGuy; 08-03-2016 at 01:32 PM.
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Old 08-03-2016, 01:42 PM #5
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Default Re: Eye protection

I've seen that thread I mean my hope is that the glasses never get put to the test but I need the to hold up if they ever do
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Old 08-03-2016, 02:29 PM #6
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Default Re: Eye protection

Also if the glasses are working well shouldn't it decrease the visible dot the laser creates?
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Old 08-03-2016, 02:41 PM #7
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Default Re: Eye protection

Yes, they should reduce the intensity of the dot considerably.
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405nm Solarstorm S3 (1.09W) • W/L Sonar (264mW)
405nm Custom JETLASERS Ti-B (1.08W)

445nm Build "Ole Blue" (2.8W+)
445nm 1.3W JETLASERS PL-E (1.5W)

450nm Custom JETLASERS Ti-B (327mW)
462nm Solarforce T2 (2.1W)-link-
465nm 1.4mW JETLASERS Mini (1.64mW)
467nm "Maraxus" (2.3W)
515nm 30mW Ehgemus titanium (84mW)
520nm S/S build (250mW) •50mW JETLASERS Ti-B (73mW)
520nm Ehgemus Custom (1.45W) •Coleman Jr. (234mW)
-link-
532nm 1.5W Goldenstar lab (3W)
532nm 500mW JETLASERS PL-E (754mW)
532nm 100mW JETLASERS Ti-B (161mW)
532nm 5mW "Eclipse" mints tin (54mW)

589nm 80mW CNI PGL-III-C (154mW)
589nm 50mW Dragonlasers Spartan (124mW)

594nm L/G Rigel-6 "LPF Anniv. Ed." (6.7mW)
635nm 20mW JETLASERS Ti (30mW)
638nm Custom JETLASERS Ti-B (232mW)-link-
638nm "Coleman Special" (260mW)
638nm Build in sinner's "MS-SSW Stubby" (1.25W)
650nm W/L E2 (89mW) • Laserbtb PL-650 1000 (1W)
660nm S/S Build (383mW)
674nm 501B/Melles Griot u/k Build 20mW

LK-3D Projector

5W Ophir/dmm LPM

Last edited by BowtieGuy; 08-03-2016 at 02:42 PM.
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Old 08-05-2016, 12:27 AM #8
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Default Re: Eye protection

They should indeed, but that alone is no guarantee. OD2 glasses will reduce the beam/dot brightness considerably too, but would not be safe in this application.

If you goggles actually are OD4 at 445nm they should be fine to use, but it's hard to tell remotely.
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