Angular aperture: Difference between revisions

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Revision as of 20:50, 21 April 2005

The angular aperture of a lens is the apparant angle of the lens aperture as seen from the focal point:

a=2\arctan {\frac {A}{2f}}

where

f

A

is the diameter of the aperture

@@ Line 1: / Line 1: @@
-The '''angular aperture''' of a [[lens (optics)|lens]] is the apparant angle of the lens [[aperture]] as seen from the [[focal point]]:
+The '''angular aperture''' of a [[lens (optics)|lens]] is the apparant [[angle]] of the lens [[aperture]] as seen from the [[focal point]]:
+:<math>a = 2 \arctan \frac {A} {2 f}</math>
-<center>
-<math>a = 2 \arctan \frac {A} {2 f}</math>
-</center>
 where