aspect ratio


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aspect ratio

[′a‚spekt ‚rā·shō]
(aerospace engineering)
The ratio of the square of the span of an airfoil to the total airfoil area, or the ratio of its span to its mean chord.
(design engineering)
The ratio of frame width to frame height in television; it is 4:3 in the United States and Britain.
In any rectangular configuration (such as the cross section of a rectangular duct), the ratio of the longer dimension to the shorter.
(mechanical engineering)
In an automotive vehicle, the ratio of the height of a tire to its width. Also known as tire profile.
(nucleonics)
The ratio of the plasma diameter of a toroidal controlled fusion device to the major diameter of the torus.

Aspect ratio

In any rectangular configuration, the ratio between the longer dimension and the shorter dimension.

aspect ratio

1. In any rectangular configuration (such as the cross section of a rectangular duct), the ratio of the longer dimension to the shorter.
2. In a rectangular configuration, the ratio of the long-side to the short-side.

aspect ratio

aspect ratioclick for a larger image
The ratio of span of the wing to its chord. It also may be expressed as the ratio of the square of the span of the wing to its area. Aspect ratio (A) = span2/wing area, span/chord, span × chord/chord2, or wing area/chord2.

aspect ratio

(graphics)
The ratio of width to height of a pixel, image, or display screen. Square pixels (1:1) are considered preferable but displays are usually about 5:4.

aspect ratio

The aspect ratio states the comparison of width to height and is commonly used to describe the shape of a TV or computer screen. For example, the aspect ratio of an earlier standard-definition (SD) screen was 4:3, which is a relatively square rectangle. The 4:3 means "4 to 3," or four units wide to three units high. Today's TVs and monitors typically have a 16:9 ratio, which is a wide rectangle that is still not as wide as most movie theater (cinema) screens.

Another way of expressing the 4:3 and 16:9 ratios is 1.33:1 and 1.78:1; however, these latter designations are used mostly for cinema formats, rather than TV (see illustration below). See letterbox, screen resolution, HDTV display modes and anamorphic DVD.


The 2.39:1 Is Also 2.4:1
The anamorphic scope aspect ratio of 2.39:1 is commonly rounded up to 2.4:1.







The Letterbox Effect
Displaying a wide screen 16:9 image (right) on a standard-definition 4:3 TV (left) creates black bars on the top and bottom. Movies that retain their original, extra-wide cinema formats will create a letterbox even on today's wide screen TVs. (Image courtesy of Intergraph Computer Systems.)
References in periodicals archive ?
To understand the bearing this will have on the print process, our team evaluated not only at area ratio--which has been the historic measure of printability--but also at the area ratio's associated aspect ratios.
To determine the accuracy of plan ratio, a study has been carried out on three different aspect ratios (AR) 1.
KOH Etching Threshold Picking-up concentration voltage voltage speed Apex diameter [check] [check] [check] [check] Aspect ratio X X X X Consuming time [check] [check] [check] X
In order to evaluate the proposed effective aspect ratio model for the DGA n-MOSFET, the current densities are presented using rainbow colors in a linear scale relative to each maximum current density.
Summary of the air change rate of the building cluster in different aspect ratio m and heat flux on the building surfaces, under (a) buoyancy forces only (no incoming wind), (b) combine forces and incoming wind speed at 1 m/s, (c) 2m/s, (d) 4 m/s.
The aspect ratio (L/t) of the talc domain, which is the effective nanophase, is then calculated to be 74 for NC and TC composites, respectively, by using Eq.
A runner with a 1:1 aspect ratio showed some reduction in metal velocity, but the tendency still existed for the metal to fold over itself at the area of the ingate as well as for a small pocket of air to be entrapped.
Studies show that when the aspect ratio is decreased, the stresses in belt cords increase, while stresses along the carcass cords and circumferential stresses in the bead wires decrease.
Although not a precise tool, aspect ratio may be beneficial in choosing those smaller aneurysms at higher risk for rupture.
This image cropping is necessary because the aspect ratio (width compared to height) of a digital image is 4:3.
The dual aspect ratio feature coupled with the ability to auto switch between PAL and NTSC makes the unit an extremely versatile flat screen.