| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent contamination of an objective lens of an optical pickup device existing within an optical disk device. <P>SOLUTION: A protective film consisting of a photocatalyst (TiO<SB>2</SB>of a rutile type) is formed on a surface of an objective lens 6 of the optical pickup device on the side opposite to an optical disk. <P>COPYRIGHT: (C)2003,JPO |
