Disclosed are a lens and an LED (
light emitting diode) lamp with the lens. The lens comprises a light inlet end and a light outlet end, wherein the light input end is a revolving parabolic surface revolution
solid which uses the optic axis as the rotation axis, the periphery of the light inlet end is a revolving parabolic surface, a
light source containing cavity is formed in the small end of the light input end, a convex spherical surface is formed at a spherical cap of the
light source containing cavity, an intersection angle between the end face of the light outlet end and the optic axis is an
acute angle, a plurality of strip-shaped convex surfaces which are connected are arranged on the end face of the light outlet end, and light rays shot into the side wall of the
light source containing cavity through the periphery of the light inlet end are reflected to the end face of the light outlet end through the periphery of the light inlet end. According to the lens and the
LED lamp with the lens, the lens reflects the light rays through the periphery of the revolving parabolic surface, and converges the light rays through the convex spherical surface. Furthermore, the end face of the light outlet end is an
oblique plane which forms the
acute angle with the optic axis, the plurality of the strip-shaped convex surfaces which are connected are arranged, rectangular spots of 80 degrees*20 degrees are formed after the light rays are reflected through the end face of the light outlet end, an then are emitted out, and therefore a light outlet range is wide, the lens and the
LED lamp with the lens are simple in structure and low in cost, and optical
utilization rate of the
LED lamp with the lens is improved.