HYDROPHILIC OPTICAL MEMBER AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To provide an optical member such as glass which can maintain visibility for a long time. SOLUTION: This hydrophilic optical member consists of a substrate 2 such as glass and a hydrophilic thin film 1 comprising a metal oxide containing at least SiO formed on the surface of the substrate 2. The SiO is included by >=20 wt.% to 100 wt.% of the hydrophilic thin film 1. Water drops depositing on the hydrophilic thin film 1 spread to form a thin film on the surface of the substrate due to the high hydrophilicity of SiO and do not deposit as drops. Therefore, the optical member shows high visibility.