aperture angle

aperture angle

[′ap·ə·chər ‚aŋ·gəl]
(optics)
The angle subtended by the radius of the entrance pupil of an optical instrument at the object.
References in periodicals archive ?
In XZ plane, the low gain (2.1 dBi) at the 2.4 GHz is compensated by an aperture angle of 77[degrees] compared to 33[degrees] and a gain of 5.5 dBi at 5.8 GHz.
We consider a model of a nanotube of conical form with the geometrical parameters: the height H, the thickness w, the aperture angle [alpha], and the bottom and the top radii [R.sub.b] and [R.sub.t], respectively (se Figure 1).
There is a long-range sensor that goes out to about 820 feet and at an aperture angle of 18[degrees], so it senses objects in a long, narrow cone.
2.12 Aperture Angle Optimization for Visibility Problems in Graphics and Computer Vision
To calculate the parabola, a mathematical analysis was performed to find the values that satisfy the design criteria, like: diameter, aperture angle, and concentration ratio.
In such case, the beam aperture angle is not the same for all the beams of the cluster and three angles are needed to characterize the beams' shape.
The microscope combines an in-lens field emission gun with an aperture angle control lens, optimizing large probe currents (up to 200 nA) for operation at the smallest probe diameter.
The JSM-7800F combines an in-lens field emission gun with an aperture angle control lens, optimizing large probe currents (up to 200 nA) for operation at the smallest probe diameter.
Featuring a revolutionary design with sustainability and functionality at its core, eno is characterised by the lever's precise 90 degree aperture angle. While conventional single-lever mixer taps provide a mixture of cold and warm water in the neutral lever position, eno reduces hot water consumption by solely supplying cold water, ensuring that no additional energy costs are incurred.
This proves problematic in panorama applications, since remote objects or objects outside the aperture angle cannot be detected.
These 3D ADCIGs are functions of both the aperture angle and the reflection azimuth.