How to avoid optical lens imaging aberrations?

As light passes through each surface of an optical system, it causes various aberrations, which can lead to imaging blurring, distortion, and other defects.

Aberration is the description of the incomplete degree of optical system imaging. It is particularly important to correct the aberration and imaging effect of each optical element in the optical system.

Optical lenses can focus or diverge light to form an image of an object at the desired location and are an integral part of optical imaging and lighting systems.

When light is transmitted, it is affected by factors such as refraction, reflection, diffraction and defects of optical elements, resulting in spherical aberration, coma, astigmatism, field curvature, distortion and chromatic aberration, which will affect the final imaging effect of the entire optical system.

In addition to perfect and rational optical system design, achromatic lenses and high-quality optical components are often used to correct aberrations.

Spherical aberration, coma and astigmatism can be eliminated at some special points in the lens. This kind of lens not only meets the requirement of large aperture of the whole objective system, but also is often used in the design of large aperture microscope objective.

Not only that, but aberrations are also beneficial and fixed. However, in other cases where lenses are used, the distance between the lens and the object is often not fixed.

Therefore, a single lens cannot fully meet the requirements of aberration correction, and lens combinations and achromatic lenses are commonly used in optical systems to correct the erecting.

They consist of two or more lens elements, where the lens elements are made of different glass materials and can usually correct the color difference of blue and red wavelengths, and can mutually correct the color difference of two single lenses.

Apochromatic lenses compensate for the third wavelength to minimize the three wavelengths of the sphere and color difference, and are commonly used in precision microprocessing and imaging.