Patent ID: 6793339
Filing Date: 2004-09-21
Classification: G02B,G02C

Abstract:
An optical lens comprisinga lens element; and an asymmetric reflectance, light absorbing coating including at least four alternating layers of Silica (SiO2) and Chromium (Cr), Niobium (Nb) or Zirconium (Zr) metal; and wherein the thickness and/or number of the respective layers are selected to provide an anti-reflective effect on the eye side of the optical lens and a desired colour on the other side of the optical lens, wherein the asymmetric reflectance, light absorbing coating includes alternating layers of silica and niobium metal and an additional niobium oxide (Nb2O5) and/or silica (SiO2) layer of such thicknesses to provide a desired colour to the optical lens.