Because apochromatic lenses focus colors at the same point, they allow users to fully focalize the image. Compared with uncorrected singlet lenses, apochromatic lenses can produce clearer images, making it easier to observe and obtain more accurate perception.
When the apochromatic lens first introduced, they brought revolutionary changes to the imaging method. Although the quality of lenses is being constantly improving, apochromatic lenses are still the main application in scientific and non-scientific optical applications. Some of the advantages of apochromatic lens components are as follows:
First, improved image quality. The apochromatic lens eliminates the color band, greatly improving the brightness and clarity of the image. This fact is especially true for multicolor imaging.
Second, efficient optical transmission. Unlike singlet lens, the coaxial performance of an apochromatic lens does not decrease as the aperture size increases, allowing you to use the entire transparent aperture.
Third, cost-effective production. Although apochromatic lenses can be improved, these lenses are much more expensive. For most purposes, apochromatic lenses can correct by a large extent, making it the most cost-effective way to obtain clear white light images.
In order to produce the desired color correction effect, optical lens manufacturers must use two or more types of optical glass, which have different amount of wave dispersion. Generally, the process involves concave lens elements with high dispersion and convex lens elements with low dispersion. Two lenses are installed so that the deformation of one lens closely offsets the deformation of the other one. This kind of apochromatic lens is called an apochromatic doublet lens and is the most common apochromatic lens, although there are also triplet lenses.