Different types of lenses Lenses are labeled through the curvature of the two optical surfaces. A lens is biconvex (or double convex, or maybe convex) if both of those surfaces are convex. If each surfaces hold the identical radius of curvature, the lens is equiconvex. A lens with two concave https://napkinring32985.mybloglicious.com/44986982/온라인-쇼핑몰-fundamentals-explained