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Lasers are Dangerous to Eyes

Experts classify laser emitting devices according to the wavelength and power of the beams they generate, and, consequently on how much danger they pose to users.

Because laser beams are so tightly focused, they are quite dangerous. Even a small amount of laser light can cause permanent eye injury, burning the retina, and therefore government regulations control exposure.

Most of the danger from laser light comes from the heat, but at some wavelengths (not the wavelength we use:1076nm IR) there are also dangerous photo-chemical effects. With high-powered lasers, even reflected diffuse light can damage eyes. However, most of the danger from laser beams comes from its coherence, concentrating an intense amount of energy upon a tiny spot of the retina, destroying photoreceptor cells.

Infrared lasers, mostly used in our handheld laser Welding Machines, pose a particular hazard.

Because they cannot be seen, they do not trigger the eye’s blink reflex.

Powerful lasers in the 400-1400 nm range penetrate the eyeball and heat the retina. At other wavelengths, the cornea and lens absorb the energy, leading to cataracts or burns. The retina has no pain receptors, so exposed workers often don’t even know they’ve been injured until they detect the resulting vision problems.

Our Selected Safety eyewear for laser welding

Good Eyes Safety Requires Wearing Protective Eyewear When Using Welding or Cleaning Lasers

Glasses and goggles are clasified by its Optical Density (OD).

That is the base-0 logarithm of the attenuation factor by how much the filter reduces the beam’s power. For example, glasses with OD 2 reduce the laser beam by a factor of 100 (10²), glasses with OD 3 reduce the laser beam by a factor of 1000 (10³), ... Required eyewear must reduce the OD to a power below the maximum permissible exposure.
You must also make certain the lenses and frames of the glasses are physically strong enough to take a direct hit from the laser without breaking. Therefore, you must also take into account their damage threshold. The OD and light wavelengths the glasses protect against must be printed on the frames or in the glass.
Also, laser operators must wear the glasses specifically for that laser’s wavelength. Laser glasses for another machine, with a beam of a different wavelength, are not safe even if their OD is just as high or their laser frequency is different.

Coated protection goggles are not alowed as a small scratch in the coating makes them useless!! The lens material must contain the laser absobtion material thru all the lens-material.

GREEN Type 1 Eyewear Filter Material for Laser Welding

GREEN - VLT 62+ - OD7+

Green Colour protection

Recommended for all wobble laser welding material
Very good visibility
Red pointer fully visible
Good protection
Optical Density for Wleding laser Light: OD 7+ CE
Filter: 190~450nm OD7+ & 800~1100nm OD7+
Visible Light Transmittance rate: VLT 62-64% : very clear and good view
Fully coloured material, no scratchable coating
Resist frontal laser shots

GREEN Type 2 Eyewear Filter Material for Laser Welding

Dark GREEN - VLT 42+ - OD6

Dark Green protection for high sensible eyes NEW!

Recommended for all laser welding material
Very good visibility
More tempering the melting pool light
Special for welders complaining on too bright light
Red pointer fully visible
Good protection
Optical Density for Wleding laser Light: OD 6+ CE
Filter: 850~1300nm OD6
Visible Light Transmittance rate: VLT 42-44% : very clear and good view
Fully coloured material, no scratchable coating
Resist frontal laser shots

ORANGE Type 3 Eyewear Filter Material for Laser Welding

BRAUN VLT 46% - OD8+

Braun Colour Protection

Recommended for bright Splattering welding material
Very good visibility
Red pointer fully visible
Good protection
Optical Density for Wleding laser Light: OD 8+ CE
Filter: 190~540nm OD3+ & 800~1100nm OD8+
High protection against laser light
Visible Light Transmittance rate: VLT 52-56%: very clear and good view
Fully coloured material, no scratchable coating

OUR SELECTED LASER WELDING SAFETY EYEWEAR For LASER WELDING

1064 ~ 1084 nm FIBER LASER SAFETY GLASSES - 1064 ~ 1084 nm YAG LASER SAFETY GOGGLES

Our selected eyeware for welding laser protection

Full range of excellent laser protective eyeware from Lasermach

Model 01 - Multi adjustable Frame Goggles

Excellent fitting Frame goggles for everyone

Model 05 - Ultra light adjustable protection Spectacle

Best in class for lightness and flexibility

Model 08 - Frame Fit-over Good fitting Protection

Goggles for eveyone with and without prescription glasses!

Model 11 - Frame Fit-over

Good fitting Protection Goggles for eveyone!

MODEL 10 - O-FRAME 2.0 PRO Ventilated Ski Type Goggles with Laser Welding protective Lenses

SKI TYPE Goggles for the Active moving Welder

Whenn you want full protection in any position, this is the one you need!

Vertical, horizontal, above your head, this goggle stays on your head and gives you in any position a perfect protection

Face shield Mini

Laser Face Shield

Standard Delivery with our machines

Laser Welding helmet full cover: comfort model

Face Shield full cover - High Comfort (new 2023 - 10)

Heavy Duty Laser Welding helmet full cover: comfort model with steel shield protection cover

Heavy Duty Face shield Full cover with Steel protection - High comfort

Protection Windows for safety cabins

The main application range is for our windows laser welding enclosures.

Laser Protection windows:

Maximum Dimensiosn : 1640 mm x 1000 mm

Safety windows for laser welding and laser cleaning

Protection Folie for Normal windows laser protection

Laser Protection Removable Film for Laser Welding and laser cleaning applications

Laser protection film for lasers in the IR laser welding and laser cleaning range

Get our Laser Welding Eyes protection special

Lasermach laser welding protection glasses - laser welding protection goggles - laser welding protection face shields - laser welding protection helmets - laser welding protection for eyes

GOTO our Download page to download the manual and price list

Absorbtion Protective goggles or reflecting protective goggles?

Which Protective goggles are the best?

Never use coated protection Glasses !!!

Every little scratch let full acces to your eye !!

Use only fully coloured lenses, with fully protection in the lenses itself.

Never use coated glasses as the slightest scratch in the coating makes your glases unsafe and not more usable!

Don't let your eyes destroy by cheaper coated safety glasses!!

Check how we are Testing our Laserwelding protection goggles !

Full power frontal shots from very nearby with high power laser shots - only good laser welding glasses resist this test!

Difference Between Optical Density and Absorbance

For absorbance measurements, the optical density (O.D.) is a logarithmic measurement of the percent transmission (%T) and it can be represented by the equation, A = log10 100 / %T.

The key difference between optical density and absorbance is that the optical density measurement takes both, the absorption and scattering of light, into consideration whereas absorbance measurement takes only the absorption of light into consideration. Optical density (OD) is the degree to which a refractive medium retards transmitted rays of light while absorbance is a measure of the capacity of a substance to absorb light of a specified wavelength.

That means a protection goggle with:

1 O.D. allows 10% of light to be transmitted through the sample = 10 times weaker
2 O.D. allows 1% of light to be transmitted through the sample = 100 times weaker
3 O.D. allows 0.1% of light to be transmitted through the sample = 1000 times weaker
4 O.D. allows 0.01% of light to be transmitted through the sample= 10.000 times weaker …

In other words, if a protection goggle has an O.D. (Optical Density) equal to 3, this means that only 1 photon of light out of 1,000 (10³) will be pass thru the protection goggle, if it has an O.D. equal to 7, this means that only 1 photon of light out of 10.000.000 will be pass thru the protection goggle. This means the light passing thru will be 1000 or 10.000.000 times less for the frequency indicated.

VISIBLE LIGHT TRANSMISSION (VLT)

When deciding which kind of lenses to purchase, a good place to start is with the visible light transmission (VLT). The higher the VLT percentage is, the lighter the lens tint will be. Higher VLT percentage lenses will allow for more light to travel through the lens that will then hit the eye. Alternatively, lenses with a lower VLT percentage will have a darker tint and will block more light from coming through to the eye.

Visibility Light Transmission (VLT) – Color and visibility of specific color ranges often are significantly affected by laser glasses and goggles. Think about sunglasses - when wearing sunglasses to block the sun, (often less expensive) sunglasses do an effective job of blocking the sun. However, everything is much more difficult to see because not a lot of light generally is coming through. Other times with (typically more expensive) sunglasses, the sun is blocked and everything else looks very similar to how it would without the glasses. We have selected the lenses with the highest VLT % with the highest protection possible for your Eyes and giving the nicest and clearest view of the objects.

Laser protection class 4 applies to our Wobble manual laser welding equipment when in operation.

Different measures are therefore required on the customer side to ensure laser safety, such as the appropriate training of employees, wearing special protective equipment and setting up a separate laser safety area.