Essilor International (Compagnie Generale D'Optique)
发明人:
Karl Citek,Gilles Baillet,Francisco De Ayguavives,Gabriel Keita
申请号：
US14023864
公开号：
US09000390B2
申请日:
2013.09.11
申请国别(地区):
US
年份:
2015
代理人:
摘要：
An index value is calculated for rating an eyeglass with respect to protection against UV hazard. The index value is based on an integrated UV transmission value through the eyeglass and an integrated UV reflection value related to a back face of the eyeglass. Thus, the index value takes into account actual wearing conditions where UV eye exposure is due either to transmission through the eyeglass or reflection on the eyeglass back face. Respective index values obtained for a set of eyeglasses allow easy sorting of the eyeglasses with respect to UV protection efficiency.
