| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical element including a photocatalyst layer formed of photocatalyst particles and capable of obtaining high transmissivity, and to provide an optical device equipped with the same.SOLUTION: The present invention includes a translucent base material 2 and a photocatalyst layer 4 formed of photocatalyst particles 5 and provided on the translucent base material 2. The photocatalyst layer 4 includes a thin region 6 whose thickness is 4 nm or less, and an average film thickness of the photocatalyst layer 4 is 1 nm or more and 9 nm or less. Moreover, arithmetic average roughness (Ra) of the photocatalyst layer 4 is 1 nm or more and 50 nm or less. |
