Simple lens - Citizendia

In optics, a simple lens or singlet lens is a lens consisting of a single simple element. A lens is an optical device with perfect or approximate Axial symmetry which transmits and refracts Light, converging or diverging Typical examples include a magnifying glass or a lens in a pair of simple reading glasses. magnifying glass (called a hand lens in laboratory contexts is a convex lens which is used to produce a magnified Image of an object Glasses, also called eyeglasses or spectacles, are frames bearing lenses worn in front of the Eyes normally for vision correction,

Simple lenses are prone to chromatic and other aberrations and cannot be used by themselves for precise optical requirements. In Optics, chromatic aberration is caused by a lens having a different Refractive index for different Wavelengths of Light Aberrations are departures of the performance of an optical system from the predictions of Paraxial optics.

Some cameras with fixed lenses have however been made using a simple lens, usually a meniscus lens with the convex face outwards. A camera is a device used to capture images either as still Photographs or as sequences of moving images ( Movies or Videos. A focus free lens is a Photographic lens whose focal point is fixed at its Hyperfocal distance. A lens is an optical device with perfect or approximate Axial symmetry which transmits and refracts Light, converging or diverging 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. Eastman Kodak Company ( is an American multinational Public company which produces imaging and photographic materials and equipment Brownie was the name of a long-running and extremely popular series of simple and inexpensive Cameras made by Kodak. This article is mainly concerned with Still photography film For Motion picture film please see Film stock.

See also