SELECTING THE RIGHT LASER PROTECTION
Determine the laser wavelength used in your application. If you are using tunable systems or multiple wavelength systems, consider all applicable wavelengths. Spectrum Laser Services offers laser eye protection for single and multiple wavelength applications. In many instances it’s desirable to incorporate protection for all applicable wavelengths into one pair of eyewear.
Laser Mode, Output Parameters and Exposure Conditions
To determine these factors, ask: Is your laser’s output continuous, pulsed or repetitively pulsed? For continuous wave lasers, consider the laser’s power (Watts) and viewing conditions. Examine the laser station for potential risk of direct or reflective exposure (Diffused Reflections, Specular Reflections, or Retro-reflections). Is your laser’s output pulsed? For single pulsed lasers, consider the pulse energy (Joules) and pulse and duration (seconds). For multiple pulsed lasers consider pulse energy (J) or average power (W), as well as the pulse rate (Hertz) or pulse count.
Required Optical Density
Once the laser’s wavelength, mode, output parameters and exposure conditions are considered, optical density (OD) can be calculated. Optical density is a measurement of the filters ability to absorb light. The required optical density for laser protection varies directly with the laser’s power or energy output. Please note that laser safety filters are labeled with the OD specifications for the corresponding wavelengths. Exposure (MPE) limits define the point at which laser light is no longer harmful to the human eye. These standards provide complicated formulas for calculating required optical density based on predefined maximum exposure limits.
The final step in selecting eyewear is considering the viewing conditions. Will you be wearing protective eyewear for extended periods? If so, comfort and fit should be primary considerations. Do you wear prescription eyewear? If so, you may want to consider the g1 goggle or f9 spectacle, which fit over most glasses or our prescription laser eye protection. Please contact us for a prescription options guide and prescription chart for our eyewear. Do you have special visible transmission requirements? Some applications require high visible transmission or excellent color recognition. In many instances the user must visualize a beam for laser alignment. When visible light is at a premium, consider High Visibility Laser Eye Protection. Our number one concern is your safety. Call us with the specifics of your laser application and we will ask the right questions to make certain that you get the right eyewear for your application. If what you need is not listed, we will customize a filter for you. We also offer laser safety windows, barriers and curtains, signs, training, publications and accessories. Please ask about these products.