angular aperture


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Related to angular aperture: aperture angle

angular aperture

[′aŋ·gyə·lər ′ap·ə·chər]
(optics)
The angle subtended at an axial object point of an optical instrument by the radius of the entrance pupil.
References in periodicals archive ?
Therefore, to reduce the angular aperture and increase the angular resolution the number of array elements should be increased.
The Abbe equation shows that an objective lens with a large angular aperture will produce a higherresolution image than one with a smaller angular aperture.
r] is given by the angular aperture [DELTA] of the slits.
The frequency range of the following examples is f = 8 ~ 12 GHz with 401 frequency steps, the angular aperture is [theta] = 0[degrees] to 360[degrees] with 1201 angular steps.