Plano-convex Lenses present a curved interface and a planar interface. They are for instance the microlenses situated on top of a wafer, and also encountered in macroscopic optical systems. Plano-convex lenses are useful for collimating diverging...

Concave lenses are considered to be negative lenses because light waves passing through them diverge, or are scattered away from, a focal point or centerline. This divergence occurs because the lens is thinner in the center and thicker on the...

Double convex (DCX) lenses have two convex surfaces with equal radii. They have focal points on both sides of the lens; these and the points at twice the focal length are used to locate objects and images. Since both surfaces...