Category:Lenses
A simple lens is an optical element with perfect or approximate axial symmetry which transmits and refracts light, concentrating or diverging the beam. A compound lens is an array of simple lenses (elements) with a common axis; the use of multiple elements allows more optical aberrations to be corrected than is possible with a single element. Manufactured lenses are made of glass or transparent plastic. Elements which refract electromagnetic radiation outside the visual spectrum are also called lenses.
By analogy a catadioptric system based on a convex mirror is customarily called a lens when used in photography, but not on a telescope.
Subcategories
This category has the following 6 subcategories, out of 6 total.
Pages in category "Lenses"
The following 53 pages are in this category, out of 53 total. This list may not reflect recent changes.