Angular aperture - Alchetron, The Free Social Encyclopedia
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Angular aperture - Alchetron, The Free Social Encyclopedia
The angular aperture of a lens is the angular size of the lens aperture as seen from the focal point a 2 arctan ( D 2 f ) 2 arctan ( D 2 f ) where f is the focal length D is the diameter of the aperture. In a medium with an index of refraction close to 1, such as air, the angular aperture
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