Sorts of lenses Lenses are labeled with the curvature of the two optical surfaces. A lens is biconvex (or double convex, or just convex) if both of those surfaces are convex. If the two surfaces have the same radius of curvature, the lens is equiconvex. A lens with two concave https://napkin-hk41852.ezblogz.com/55163858/렌즈-네이버-secrets