In many laser applications, having a clear view of the process is essential. For this, transparent safety panels are often employed. However, ensuring these panels provide adequate protection is crucial, especially when working with high-intensity lasers like COâ‚‚Â and fibre lasers.
Transparent Panels for Laser Safety
For COâ‚‚Â lasers, clear polycarbonate sheets are commonly used. However, their use is only acceptable when:
The laser intensity on the panel does not exceed 10 times the Maximum Permissible Exposure (MPE) limit.
Thorough testing has been conducted and documented under worst-case conditions by the system manufacturer.
Laser Safety Panels and Eyewear
For higher-intensity CO₂ lasers or shorter-wavelength lasers like fibre lasers, certified laser attenuating panels or eyewear must be used to ensure safety.
Safety Standards for Panels and Eyewear
In the UK and EU, laser safety requirements for viewing panels and eyewear are defined by the following standards:
EN207:2017 – Laser eye protection.
EN12254:2010 – Laser safety screens for low to medium-power lasers (less than 100W or 30J).
EN ISO 19818:2021 – Provides rigorous criteria for both attenuation and resistance to laser radiation.

Key Differences:
While U.S. regulations focus solely on attenuation (the ability to reduce laser intensity), EC/UK standards emphasise both attenuation and resistance. This includes testing the panel's ability to endure specific laser intensities over time without degrading.
Decoding Laser Safety Markings
Laser safety panels and eyewear must be marked to indicate their compliance with these standards. For example:
EN207 1060-1080 DI LB5 X CE
EN12254 DI AB5 X 1060-1080 CE
ISO19818 1060-1080nm OD5 CP5 CE
What do these markings mean?
Wavelength (e.g., 1060-1080nm):Â Specifies the laser wavelength range the protection is designed for.
DI/CP:Â Indicates if the protection is for continuous or pulsed lasers.
LB5/AB5/OD5:Â Denotes attenuation level (e.g., LB5 = 100,000x reduction).
CP5:Â Indicates resistance to laser intensity during operation.
Designing for Safety
The choice of safety panels depends on the laser's power and intensity at the panel during both normal operations and potential faults. Enclosures must be designed to prevent overexposure of panels or eyewear.
The Future of Standards
ISO19818 introduces stricter requirements for both attenuation and resistance, making it more rigorous than EN207. It is anticipated that ISO19818 will eventually replace EN207, becoming the primary standard in the EU and UK.
Key Takeaways
Certified Protection Only:Â Panels and eyewear must be clearly marked with their compliance, attenuation, resistance, and CE mark.
Standards Matter:Â Without compliance with EC/UK standards, safety equipment is inadequate and not permissible in EU, UK, or affiliated countries.
Always Verify:Â When in doubt, ensure your equipment meets ISO19818 or equivalent standards to provide maximum protection.
Clear panels and proper eyewear not only enhance visibility but also ensure safety. Always prioritise certified solutions to protect personnel and maintain compliance in laser applications.
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