Non spherical types thumb|right|upright|An aspheric biconvex lens. Cylindrical lenses have curvature along only one axis. They are used to focus light into a line, or to convert the elliptical light from a laser diode into a round beam. They are also used in motion picture anamorphic lenses.
non spherical types thumb|right|upright|an aspheric biconvex lens cylindrical lenses have curvature along only one axis they are used to focus light into a line or to convert the elliptical light from a laser diode into a round beam they are also used in motion picture anamorphic lenses