A triplet lens is a type of optical lens system that consists of three individual lens elements arranged in a specific configuration. This arrangement is designed to reduce optical aberrations, such as chromatic aberration and spherical aberration, which can distort images. The three lenses typically include two convex lenses and one concave lens. The convex lenses help to converge light rays, while the concave lens counters some of the aberrations introduced by the convex lenses.
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