Patent ID: 6455103
Filing Date: 2002-09-24
Classification: B82Y,C03C,G02B

Abstract:
A method for producing an inorganic multilayered optical system, comprising the steps of:(a) applying to a glass substrate a flowable composition comprising nanoscale inorganic solid particles having polymerizable and/or polycondensable organic surface groups, the flowable composition being such that when polymerized and/or polycondensed to form an organically crosslinked layer on the glass substrate and then baked to remove organic constituents and densify the layer, it has a refractive index; (b) polymerizing and/or polycondensing the organic surface groups of the solid particles, thereby forming the organically crosslinked layer; (c) applying to the organically crosslinked layer a flowable composition comprising nanoscale inorganic solid particles having polymerizable and/or polycondensable organic surface groups, the flowable composition being such that when polymerized and/or polycondensed to form an organically crosslinked layer and then baked to remove organic constituents and densify the layer, it has a refractive index that is different from the refractive index of the layer beneath; (d) polymerizing and/or polycondensing the organic surface groups of the solid particles of the flowable composition of step (c), thereby forming the organically crosslinked layer; (e) optionally repeating steps (c) and (d) at least once, thereby forming at least one more organically crosslinked layer on the layers already present; and (f) baking the multilayered substrate, thereby removing organic constituents and densifying the layers to form the inorganic multilayered optical system.