摘要 |
<P>PROBLEM TO BE SOLVED: To prevent occurrence of cracks on an antireflection film even if exposed to the high temperature environment such as reflow processing. <P>SOLUTION: In a lens block 8, a convex lens part 20a made of a curable resin is formed on a surface of a glass substrate 16 and an antireflection film 100 is formed on the convex lens part 20a. The antireflection film 100 is constituted of a plurality of layers formed by alternatively laminating a high refractive index layer 102 and a low refractive index layer 104, and the outermost layer of the antireflection film 100 is the low refractive index layer 104. The outermost layer and at least one layer of layers provided closer to the convex lens part 20a than the outermost layer are a mixed film formed by mixing two kinds of different inorganic materials. <P>COPYRIGHT: (C)2012,JPO&INPIT |