Aspherical lens

Definition

A lens element in which at least one face is shaped to a surface of revolution about the lens axis, including conic sections but excluding a sphere.

The use of an aspheric lens in an optical system achieves several advantages. In the following comparison the aspheric lens is compared to the classical sphere. Advantages of the aspheric lens are:

• Correction of spherical aberration
• System miniaturization
• Weight reduction

 Specifications