Patent ID: 8365619
Filing Date: 2013-02-05
Classification: G01N

Abstract:
1. An assembly for testing the effectiveness of antifog coatings applied to eyewear lenses, the assembly comprising: an insulated chamber adapted to receive, support, and retain eyewear having lenses mounted thereon, the lenses having an anti-fog coating thereon; means for controlling the temperature and relative humidity of atmosphere in said chamber; means for providing a stream of warm moist air to said chamber and directed at the lenses; and a hazemeter for detecting and recording percentages of haze values over a selected period of times; and further comprising an anatomically accurate headform adapted to receive eyewear, the eyewear having the lenses fixed thereon; wherein said means for controlling the temperature and humidity in said chamber is adapted to maintain the temperature in said chamber between 10° C. and 12° C., and to maintain the relative humidity at less than 30%.