| 摘要 |
A lens array includes a plurality of concave-shaped lens faces, each of which has an outer peripheral edge portion and which is formed at a bottom of a recess, wherein a height of the peripheral edge portion from a face apex portion of the lens face is shorter than a height from the peripheral edge portion to an opening portion of the recess on a top surface, wherein a cylindrical surface is formed which is defined by the opening portion as an upper end and the peripheral edge portion as a lower end. |
