Simple lens
From Wikipedia, the free encyclopedia
In optics, a simple lens or singlet lens is a lens consisting of a single simple element. Typical examples include a magnifying glass or a lens in a pair of simple reading glasses.
Simple lenses are prone to chromatic and other aberrations and cannot be used by themselves for precise optical requirements.
Some cameras with fixed lenses have however been made using a simple lens, usually a meniscus lens with the convex face outwards. In such examples the lens aperture is made small and in some cases (such as the Kodak Brownie 127 camera}, the film plane is curved to reduce the impact of aberrations.
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