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How to Select the Best Laser Safety Eyewear Products

 

How to Select Laser Safety Eyewear


Laser Eyewear Selection Tips

There is an ever-expanding array of complex and sophisticated laser systems in use today. For laser personnel, Laser Safety Officers (LSOs) in material processing, military, medical, research and development, applications demand high-performance safety eyewear options. When selecting the most appropriate laser protective eyewear, LSOs need to consider the working environment, viewing conditions, operational and performance specifications of the laser as well as beam delivery systems.

The ultimate goal in selecting laser eye protection is to provide comfortable and stylish eyewear that laser personnel will wear with protection levels (optical densities) that properly reduce potentially hazardous laser exposure to levels at or below maximum permissible exposure (MPE) levels.

Our laser protective eyewear is available in a variety of technologies such as glass, polycarbonate, and nanospec (thin-film-coated glass). Filters are available using absorptive or reflective dielectric thin-film technology. Absorptive lens filters are made using high-impact, high-optical quality polycarbonate or glass materials. Light absorption at a specific laser wavelength is expressed in terms of optical density (OD). It is calculated by the following equations:

OD = -log10T = -log10(I/Io ) = log10 (1/T )

Where:

  • T = Transmittance at the wavelength of interest
  • Io = Intensity of incident beam
  • I = Intensity of transmitted beam

Polycarbonate, Glass, and Nanospec (Thin-Film-Coated) Laser Protective Eyewear

Polycarbonate laser protective eyewear provides LSOs with excellent low-cost, lightweight safety solutions in a wide variety of frame styles. Some frame styles allow the insertion of a prescription insert, yielding the user a custom pair of eyewear.

Absorbing glass filters generally provide higher ODs and better visible light transmission (VLT) values at a slightly higher cost per pair when compared to polycarbonate laser safety eyewear.

Nanospec or thin-film-coated filters provide precise protection at specific laser wavelengths and have excellent VLT values. Precise vapor depositions of alternate HI-LO index of refraction dielectric coatings or films are applied directly to absorptive polycarbonate or glass filter materials. This technology provides laser protection by reflective and absorptive properties.

By understanding the absorptive and reflective characteristics of various laser filter technologies, Laservision can create custom filters. We are able to bond or laminate two (or more) types of filters together to extend the spectral protection range of a single type of eyewear filter to cover a broader range of laser wavelengths.

If you have any further questions please contact us or give us a call at 651-357-1800. We are available to answer any of your questions during standard business hours, Monday-Friday, 8:00 AM to 5:00 PM.