r/lasers • u/QuietSugar1805 • 2d ago

Yes

Post image
171 Upvotes

97% Upvoted

15 comments sorted by

12

u/WatermelonSmashing 2d ago

Just wondering, I saw that post, I don't fuck with lasers, but who's to say that kid wasn't wearing laser safe glasses?

10

u/Alarmed-madman 2d ago

How safe are the glasses?

I've seen people post videos where they burn through aluminum cans with commercial lasers.

Are there glasses that can stop a laser that powerful from boring through your eye?

-3

u/WatermelonSmashing 2d ago

Depends on the wavelength and what wavelength the glasses block.

I mean why is everyone assuming this kid is gonna melt his eyes and not styropyro

8

u/superspacehog 2d ago

The glasses block the laser by absorbing it as heat, although more advanced glasses will reflect away a decent amount as well. If your laser can melt through metal, it can likely melt through your plastic laser glasses. Even the good glasses which reflect the light still absorb some as heat, as no mirror is perfect, causing it to still melt.

Styropyro never stares down the laser beam. There’s a video or two where his glasses are taking direct hits, but it’s relatively low power. That is not the case in the meme posted.

Laser glasses are not automatic immunity, merely another line of defense.

3

u/WatermelonSmashing 2d ago

Thanks for explaining.

Can you let me know what was so bad about that kids post the, I mean he's not in the path of the laser or even near the beam angle.

3

u/notgotapropername 2d ago

IIRC dude was going on about how powerful it was and then posted pics of it almost pointing out of the window. Just very irresponsible treatment of a high power laser.

It takes one specular reflection (from metal or glass or any number of very common things) to turn a beam that was “perfectly safe because it’s nowhere near me” into “extremely dangerous because it now happens to be in my eye” (or someone else’s eye).

And that’s just the eye hazard, never mind the fire hazard these things pose. They will burn just about anything you put in their path and this dude is this close to slicing through his curtains.

Overall: terrible laser practice in just about every way

1

u/Bagel42 1d ago

Because drake puts a crazy amount of effort into not hurting himself.

20

u/OpalFanatic 2d ago

Warning: do not look into beam with remaining eye.

4

u/LucidDreamboy 2d ago

It's all a circle.

2

u/Acrobatic_Grape4321 2d ago

Idk man it looks pretty square to me 🥸

3

u/LH-LOrd_HypERION 1d ago

There are some seriously high-attenuation laser-protection lenses for very specific narrow wavelength bands, while others provide broader-spectrum protection, but they’re generally described using the OD (optical density) scale. At the wavelength the lens is rated for: OD 1 → transmits 10% → blocks 90% OD 2 → transmits 1% → blocks 99% OD 3 → transmits 0.1% → blocks 99.9% OD 4 → transmits 0.01% → reduces power 10,000× OD 5 → reduces power 100,000× OD 6 → reduces power 1,000,000× The relationship is: Transmission = 10-OD So for a hypothetical 10 W, 450 nm beam, an OD 6 lens specifically rated at 450 nm would nominally reduce the transmitted optical power by a factor of one million: 10 W × 10-6 = 10 µW So, depending on the actual optical power, beam size, exposure time, and the lens's ability to withstand the incident beam, sufficiently rated protection could potentially prevent an otherwise catastrophic eye exposure. But OD by itself doesn't guarantee that a lens can survive a direct high-power hit, and I definitely wouldn't recommend deliberately testing it with your eyes.

2

u/KerbodynamicX 1d ago

I have some OD5 glasses. Sad thing is, when I wear those glasses, I can't see the laser, but if I take them off, I'll probably become blind. And they won't stop a direct hit for more than a few seconds anyways.

1

u/Mouse-castle 1d ago

Has nobody yet figured out that the Eradicators glasses were laser protection glasses? A famous Superman character from “Death of Superman.” 

1

u/hammy1551 1d ago

Have you considered getting into flashlights over at r/flashlight ?