Instead, aspheric lenses ha ve a profile that changes in curvature across the surface. This type of lens is designed to reduce spherical and optical aberrations without the need for a multi-lens ...

Figure 7.1a shows a plano convex lens element with a spherical radius, imaging an axial point from infinity. The spherical aberration is quite evident. The high angle of incidence of the upper ...

Aspheric lenses have at least one surface that is not a true sphere. The aspheric profile used is frequently a conic surface of revolution about the lens axis, matched in design to the shape of the ...

Beneficially also a correctly formed aspheric lens surface may cancel or control spherical aberration. As a result, more laser energy can be concentrated into a smaller area. Benefiting from a ...

(From Tamron lens literature) The optical system of the new SP AF 14mm F/2.8 Aspherical (IF) lens, composed of 14 elements in 12 groups, includes two Hybrid Aspherical lens elements. These large ...