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...

to find that n sin θ is constant across an interface. In air, the angular aperture of the lens is approximately twice this value (within the paraxial...

diffraction. In that case, the angular resolution of an optical system can be estimated (from the diameter of the aperture and the wavelength of the light)...

and in optics, it is the angular aperture (of a lens). The angular diameter can alternatively be thought of as the angular displacement through which...

Acceptance angle may refer to: Half of the angular aperture of an optical system Acceptance angle (optical fiber), the angle in an optical fiber below...

Enrichment Center that the game series takes place in. Numerical aperture Antenna aperture Angular resolution Diaphragm (optics) Waterhouse stop Bokeh Shallow...

Aperture synthesis or synthesis imaging is a type of interferometry that mixes signals from a collection of telescopes to produce images having the same...

forms and colours for varying the direction of the motion across the angular aperture and for accommodating the velocity of their motion to the effect which...

angle for a given concentration. Figure "angular aperture of sunlight" on the right shows the effect of the angular dispersion of sunlight on the acceptance...

^{2}\alpha }}\,,} where C is the concentration of the optic. For a given angular aperture α, of the incoming light, this concentration will be maximum for the...

magnification is the ratio between the apparent (angular) size as seen in the eyepiece and the angular size of the object when placed at the conventional...

the mean of visible wavelengths). This is equal to the angular resolution of a circular aperture. The Rayleigh criterion for barely resolving two objects...

Optical Aperture Synthesis Telescope, is a multi-element optical astronomical interferometer with baselines of up to 100 metres, which uses aperture synthesis...

can be applied, and shows Fraunhofer diffraction patterns for various apertures. A detailed mathematical treatment of Fraunhofer diffraction is given...

proportional to the diameter of its objective's entrance aperture. For telescopes with circular apertures, the size of the smallest feature in an image that...

In acoustics, dynamic aperture is analogous to aperture in photography. The arrays in side-scan sonar can be programmed to transmit just a few elements...

In electromagnetics and antenna theory, the aperture of an antenna is defined as "A surface, near or on an antenna, on which it is convenient to make assumptions...

Synthetic-aperture radar (SAR) is a form of radar that is used to create two-dimensional images or three-dimensional reconstructions of objects, such as...

sights is known as the 'sight radius', the longer of which produces smaller angular errors when aiming. "Sighting in" is a process in which the sight axis...

objective. The angular size of the central bright portion (radius to first null of the Airy disk) of the image diffracted by a circular aperture, a measure...

parameter describes the size of an imaginary telescope aperture for which the diffraction limited angular resolution is equal to the resolution limited by seeing...

angular resolution of an optical telescope is determined by the diameter of the primary mirror or lens gathering the light (also termed its "aperture")...

all factored in, the system must still be able to capture the finite angular aperture of sunlight. CPV systems are categorized according to the amount of...

_{\omega }} is open and symmetric over the positive real axis with angular aperture 2 ω {\displaystyle 2\omega } . Markus Haase (2006), Birkhäuser Basel...

The orbital angular momentum of light (OAM) is the component of angular momentum of a light beam that is dependent on the field spatial distribution,...

infraparietal parietal angular and twin paraller Siphonal notch Siphonal canal "Aperture shape Bean". accessed 3 January 2011. "Aperture shape Crescent". accessed...

"preset" aperture, which lets the photographer set the lens to working aperture, and then quickly switch between working aperture and full aperture without...

A very-small-aperture terminal (VSAT) is a two-way satellite ground station with a dish antenna that is smaller than 3.8 meters. The majority of VSAT antennas...

very high angular resolution. The VLT array is also complemented by four movable Auxiliary Telescopes (ATs) with 1.8-metre (5.9 ft) apertures. The VLT...

through an aperture of area dA0 and the area element dA will subtend a (solid) angle of dΩ0, which is a portion of the observer's total angular field-of-view...