In the time that it takes to blink an eye, laser radiation damage to the eye may have already occurred. Unprotected exposure of your eyes to lasers can result in the development of cataracts or even a corneal burn, which can result in vision loss.
If you are working with or around lasers, it is very important to understand the consequences of laser radiation exposure and the safety precautions you should take when working around them.
There are three main ranges of light wavelengths:
- Ultraviolet – 100-400 nm
- Visible – 440-750 nm - The visible range of laser light goes from violet to red just like a rainbow.
- Infrared – 750nm to 1mm (Laser Welding frequency belongs to the IR-light range (Infra-Red)
Infrared lasers pose a particular hazard. Because they cannot be seen, they do not trigger the eye’s blink reflex.
Our Welding Lasers use the dangerous Infrared laserlight
The intensive fiber laser light radiate in the visible spectrum but invisible for humans, is especially dangerous to the eye. Fibre laser radiation penetrate through to the retina which can be destroyed irrevocably by relatively little radiation.
Misdirected laser radiation can come directly from the laser and threaten the eyes as a result of a faulty parameter setting, an opened cover, a displaced mirror etc. Other hazards include skin burn or inﬂammation from combustible materials as a result of misdirected laserradiation. The greatest hazard, however, usually stems from reﬂected laser radiation: the major share of the laser radiation is reﬂected by coldmaterial ﬁrst. To this we can add reﬂections of work piece edges, as a result of turbulence in the weld pool etc.
Misdirected radiation and reﬂections must be blocked off. That is why the law stipulates that the laser beam and the work zone must be in an enclosure. Beyond that, all those present, and the machine operators in particular, should wear protective goggles that are appropriate for the laser radiation being used. Fbre laser radiation are very dangerous to the eye and require special protective measures andapproved safety goggles.
Standard protective welding goggles made of glass or acrylic glass are not suitable at all,
as glass and acrylic glass allow ﬁbre laser radiation to pass through!
The classes are as follows:
- Class 1: the radiation is not dangerous and no protection equipment needed
- Class 1M: the radiation is not dangerous when used without optical instruments but may become dangerous when used in combination with optical instruments - no protective equipment required if used without optical instruments
- Class 2: The radiation emitted is not dangerous due to aversion responses including the blink reﬂex – no protective equipment needed
- Class 2M: The radiation emitted is not dangerous due to aversion responses including the blink reﬂex but may become dangerous when used with optical instruments - no protective equipment required if used without optical instruments
- Class 3R: The radiation from these lasers exceeds the maximum permissible exposure values so is dangerous to the eyes and safety glasses are recommended
- Class 3B: Direct laser view is dangerous so safety glasses are mandatory ⇒ fiber laser welding
- Class 4: Both direct and diffuse radiation is dangerous so personal safety equipment is necessary ⇒ all handheld fiber laser welding machines and laser cleaning Machines belongs to class 4
This class 4 covers most powerful and dangerous lasers
Class 4 lasers can cause permanent eye injury through either direct exposure or reflected light.
They can also burn the skin and cause fires.
All lasers used in welding industry, surface cleaning industry and metal cutting industry are Class 4.
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.
Laser system eye and skin hazards are addressed in the laser safety standards. In many use situations, special laser eye protective devices are required. According to the safety standard, this eyewear must be labeled with both the optical density (protective factor) and wavelength(s) for which the protection is afforded. The protective eyewear must be compatible with the manufacturer’s specifications for the laser system in use, to ensure that the eyewear is suitable. In addition to the primary hazard of the laser beam, there may be a considerable eye hazard from high levels of secondary radiation. The safety standard requires that the eyes be protected from this secondary radiation in addition to the primary laser beam. A precaution must be added here—standard safety glasses alone do not provide protection. Any laser eyewear, plain or prescription, must be labeled with the wavelength(s) of protection and the optical density at that wavelength(s). In some laser systems, infrared light may be leaked into the workplace. Thus the eyewear should provide primary beam protection, secondary radiation protection, and also infrared protection.
Use only in fully Mass tinted glasses, with fully protection in the glasses itself.
Never use surface coated glasses as the slightest scratch in the tiny surface coating makes your glases unsafe and not more usable for laser welding!
Don't let your eyes destroy by cheaper but coated safety glasses!!
Lasermach laser welding protection glasses - laser welding protection goggles - laser welding protection face shields - laser welding protection helmets - laser welding protection for eyes
- Never point the laser beam at anyone’s eyes!
- Do not look directly into a laser beam!
- Always wear protection glasses!
- If the laser light accidentally strikes your eyes,
- close your eyes and immediately move your head out of the laser beam.
- Do not use any focusing optical device to look at the laser beam while working with lasers.