Confocal 39739 94693083 2006-12-16T12:30:32Z Keesiewonder 2518337 add to category optics '''Confocal''' means having the same [[Focus (geometry)|foci]]. * In [[conic section]]s, it is said of two [[ellipse]]s, two [[hyperbola]]s, or an ellipse and a hyperbola which share both foci with each other. If an ellipse and a hyperbola are confocal, they are [[perpendicular]] to each other. * In [[optics]], it means that one [[Focus (optics)|focus]] or image point of one lens is the same as one focus of the next [[lens (optics)|lens]]. ==See also== *[[Confocal laser scanning microscopy]] *[[Confocal microscopy]] [[Category:Elementary geometry]] [[Category:Optics]] [[de:Konfokal]]