Aspheric lenses are used to eliminate spherical aberration in various applications, including barcode scanning, laser diode collimation, or OEM or R&D integration. Aspheric lenses are designed with a single component, which helps to minimize the number of lenses in multi lens optical accessories.
Aspheric lenses can reduce spherical aberration. Standard spherical lens can never reach the precise focusing level provided by Aspheric lens. The essence of the irregular surface shape of an aspheric surface is to enable it to manipulate multiple wavelengths of light more accurately simultaneously, thereby obtaining clearer images.
An aspherical lens can correct the curved off axis aberration of the image field. Usually, optical designers must 'stop' their optical system to physically exclude the outermost area of the lens, which can cause image deformation near its edges. Due to the aspherical design, incident light can be better corrected to the focal point, thereby increasing the available aperture of the lens, which can provide greater luminous flux.
One of the biggest benefits of using an aspherical design is that it reduces the overall number of lenses required to obtain a given result. A single Aspheric lens can provide the same accuracy as multiple standard lenses used in series before, reducing the overall weight, size, and even the cost of the final design.