Choosing the Right Laser Safety Goggles: A Buyer’s Guide

1. Identify Your Laser’s Specifications

• Wavelength (nm): UV, visible, or infrared?
• Power (Watts): Continuous wave (CW) or pulsed?
• Class: Class 3B/4 lasers always require goggles.

1. Understand Optical Density (OD)
   Use the formula: OD = log₁₀(Incident Power / Safe Power). For a 10W laser needing 0.001W exposure, OD = log₁₀(10/0.001) = 4.
2. Certifications Matter
   Ensure compliance with ANSI Z136.1 (U.S.) or EN 207 (EU) standards.
3. Test for Fit and Visibility
   Poorly fitting goggles or dark lenses can cause accidents. Opt for wraparound designs with side protection.

Pro Tip: Label your goggles with their wavelength/OD to avoid mix-ups in shared workspaces!