| abstract |
A microlens array having a substrate and microlenses of a substantially circular profile provided on the substrate and each arranged such that a major axis and a minor axis thereof, which pass through a center of the substantially circular profile and intersect at 90 degrees, are substantially equal in length to each other, and sectional forms at faces vertical to an axis parallel to the major axis or the minor axis are, respectively, made of the same curved shape at any position. |