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]]