Sell optical lens

Description

A lens is an optical device with perfect or approximate axial symmetry which transmits and refracts light, converging or diverging the beam. A simple lens consists of a single optical element. A compound lens is an array of simple lens with a common axis; the use of multiple elements allows more optical abberations to be corrected than is possible with a single element. Lens are typically made of optical glass(or common glass).Elements which refract electromagnetic radiation outside the visual spectrum are also called lenses: for instance, a microwave lens can be made from paraffin wax.