An aspheric lens or asphere is a lens whose surface profiles are not portions of a sphere or cylinder. In photography, a lensassembly that includes an aspheric element is often called an aspherical lens.
Aspheric Lens are used to eliminate spherical aberration in a range of applications,including bar code scanners, laser diode collimation, or OEM or R&D integration. Aspheric lenses utilize a single element design which helps minimize the number of lenses found in multi-lens optical assemblies. Said another way, unlike conventional lenses with a spherical front surface, aspheric lenses have a more complex front surface that gradually changes in curvature from the center of the lens out of the edge of the lens. This reduction in total element count not only helps decrease system size or weight, but also simplifies the assembly process. Integrating aspheres into an application such as focusing the output of a laser diode may not only decrease total cost, but may also outperform assemblies designed with traditional spherical optical lenses.
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