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Advantages of Aspheric Lenses

Feb. 26, 2021

The most significant advantage brought by the aspheric lens is that it can correct spherical aberration. Spherical aberration is produced by using the surface of a Spherical Lens to focus or align light. Therefore, in other words, all spherical surfaces, regardless of whether there are any measurement errors and manufacturing errors, will have spherical aberration. Therefore, they will need a non-spherical or aspherical surface to correct it. By adjusting the conic constant and aspheric coefficient, any aspheric lens can be optimized to minimize aberrations.

Aspheric Lens

Aspheric Lens

Performance benefits

Although there are many different technologies on the market to correct the aberrations caused by the spherical surface, these other technologies are far less than what an Aspheric Lens can provide in terms of imaging performance and flexibility. Another widely used technique involves increasing f/# by "shrinking" the lens. Although this can improve the quality of the image, it will also reduce the luminous flux in the system. Therefore, there is a trade-off between the two.

System advantages

Aspheric lenses allow optical element designers to correct aberrations with fewer optical elements than traditional spherical elements, because the former provides more aberration corrections than the latter can provide with multiple surfaces. .

Optical systems that use more optical components may negatively affect optical and mechanical parameters, resulting in more expensive mechanical tolerances, additional calibration steps, and more AR coating requirements.

"Aspheric lens" includes any object that is not spherical. However, when we use the term here, we are specifically talking about a subset of aspheric lenses, which have a radius of curvature and whose radius changes radially according to the center of the lens. Rotationally symmetric optical element. The aspheric approach can improve image quality, reduce the number of components required, and reduce the cost of optical design.

If necessary, please feel free to contact the Aspheric Lens Supplier