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.