| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical element having optical performance such as superior reflection suppression performance and high design flexibility. <P>SOLUTION: The optical element has a first layer 14, a second layer 15 and a base member 11 laminated in order from the light incidence side. The first layer has an irregular structure in which a convex part 14a and a concave part 14b are alternately formed at a pitch smaller than the wavelength λ of the incident light. The second layer includes a plurality of layers 13 and 12 of which refractive indexes are different from each other. <P>COPYRIGHT: (C)2009,JPO&INPIT |
