Add to Del.icio.us Add to Reddit Post to Digg Submit to Newsvine Store at Furl Add to Yahoo Myweb Post to Stumbleupon Post to Google


Periodic Table - Chemistry Definitions - Test your knowledge - Add to Favorites - Useful Resources - Link to Us

Fresnel lens definition

 A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

 


an aspheric lens whose surface is broken up into many concentric annular rings.  Each ring refracts incident rays to a common focus, so that a very large-aperture and small f-number thin aspheric lens results.  Not to be used for precision focusing applications.

See also:

furanocoumarins definition
g-factor definition
Formula Weight definition
functional pattern definition
function definition