The Natick Soldier RD&E Center (NSRDEC) has developed a standardized test platform for the performance evaluation of anti-fog coated eyewear. There currently exists no widely-established test method for the quantitative assessment of anti-fog coating efficacy. Disparate standards apply to sub-segments of the eyewear market, such as ski goggles or personal eye protection. Protective eyewear is required to prevent eye injuries and reduce solar glare. However, heavy exertion can result in fogging of the eyewear, creating negative impact on effectiveness and safety.
The Natick device uses empirical measurements of delta haze to determine effectiveness of coatings under condensation-inducing conditions. The 2nd generation test apparatus is suitable for testing spectacles and goggles. The 3rd generation device will be enhanced to test gas masks and similar items, as well as measure the effects of helmets and other items on the overall “system” effectiveness of eyewear designs. The Army has been working with eyewear manufacturers to improve the test systems design. Natick has also engaged with industry and ASTM to work toward an industry standard.
- Empirical Performance Measurement: Quantitatively assesses the efficacy of coatings while tracking environmental parameters such as temperature and humidity
- Broadly Applicable: Current device effective for spectacles and goggles; next-generation device will handle gas masks and other full face devices as well as assess overall systemic performance when used with helmets and other ancillary headgear
- Standardization: The Natick device offers potential for an industry standard performance measure for anti-fog coatings in eyewear
- 2nd generation device built and tested; 3rd generation device in development
- US Patent 8,365,619
- Potential for collaboration with US Army Soldier RD&E Center researchers to further develop and test this device for military and commercial use