Optical elements having cured coating film
AssigneeHoya Corporation
InventorsEiichi Yajima, Yoshitane Watanabe, Keitaro Suzuki, Tetsunori Matsukura
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Abstract
An optional element having a cured coating film on optical base material wherein the cured coating film is prepared with a coating composition comprising an organosilicon compound and modified stannic oxide-zirconium oxide composite colloidal particles which are obtained by partially or fully coating the surface of stannic oxide-zirconium oxide composite colloidal particles with tungstic oxide-stannic oxide composite colloidal particles. The formed cured coating film is excellent in hot water resistance, and light-resistance and weathering resistance are not impaired even when the antireflection film made by vepor deposition of inorganic oxides is applied on the cured coating film.
Claims18
An optical element having a cured coating film on an optical base material wherein the cured coating film is prepared with a coating composition comprising 100 parts by weight of an organosilicon compound and 1 to 500 parts by weight coated stannic oxide-zirconium oxide composite colloidal particles which are obtained by partially or fully coating the surface of stannic oxide-zirconium oxide composite colloidal particles with tungstic oxide-stannic oxide composite colloidal particles.
Dependencies are inferred from the claim text.