Aspheric surface

An aspheric surface is a special curved surface whose surface shape is different from that of a spherical surface. In the field of optics, aspheric lenses are used to improve aberrations and deformations, and to improve the clarity and visual comfort of the lenses because of their special shape design. The design of the aspheric lens can make the lens lighter, thinner and flatter, while maintaining excellent impact resistance, making it safe for the wearer. The surface arc of the aspheric lens is aspheric design, which has the advantages of clearer, easier and more natural than the spherical design lens.

In addition, the mathematical characteristics of aspheric workpieces can also be divided into several categories. One type is a rotational aspheric surface with symmetry, such as a rotational paraboloid, a rotational ellipsoid, a rotational hyperboloid, and a rotational high-order aspheric surface, etc. The other type is an aspheric surface with two axes of symmetry, such as a toric surface, a cylindrical surface, etc. There is also a free surface without symmetry. Compared with other types of aspheric surfaces in optoelectronic systems, aspheric surfaces can also be divided into secondary aspheric surfaces and high-order aspheric surfaces.