The aspect ratio or proportions of a two-dimensional shape is the ratio of its longer dimension to its shorter dimension. It is also applied to two characteristic dimensions of a three-dimensional shape, especially for the longest and shortest 'axes' or for symmetrical objects (e. g. rods) that are described by just two measures (e. g. length and diameter). In such cases, the aspect ratio may evaluate to a value less than one (e. g. consider very short and very long rods). The aspect ratio of a torus is the ratio of the major axis R to the minor axis r. In Geometry, a torus (pl tori) is a Surface of revolution generated by revolving a Circle in three dimensional space about an axis Coplanar
In aviation, the aspect ratio of aircraft tapered wings is found by dividing the square of the wing span {b} by the total wing area (S):
AR = b2/S
If the wing has a constant chord, the aspect ratio is the result of dividing the wingspan (b) by the value of the chord (c):
AR = b/c
Similarly, if the value of the mean geometric chord is known, the aspect ratio is the result of dividing the wingspan by the value of the mean geometric chord:
AR = b/cmean
The term is most commonly used with reference to:
- aspect ratio (image)
- computer display standard
- paper size
- pixel aspect ratio
- tire code
- tire sizing
- aspect ratio (wing) of aircraft or birds
- aspect ratio (optics) of a lens diameter or longest dimension relative to its thickness
| 16: | 15: | 12: | |
|---|---|---|---|
| :8 | 2:1 | 3:2 | |
| :9 | 16:9 | 5:3 | 4:3 |
| :10 | 8:5 | 3:2 | |
| :12 | 4:3 | 5:4 | 1:1 |
- 1. In reference to Aircraft, chord refers to the distance between the leading edge and trailing edge of a Wing, Horizontal stabilizer or Vertical stabilizer A chord of a Curve is a geometric Line segment whose endpoints both lie on the curve The aspect ratio of an Image is its width divided by its height Various computer display standards or display modes have been used in the history of the Personal computer. There have been many standard sizes of Paper at different times and in different countries but today there are two widespread systems in use the international standard (A4 Pixel aspect ratio (PAR in Computer graphics terminology is a mathematical Ratio that describes how the horizontal length of a Pixel in an imaging Tire code or Tyre code - Automobile Tires are described by an alphanumeric code, which is generally molded into the Sidewall of the Plus sizing is the practice of changing a specific tire to a larger size while compensating with reductions in other aspects of the tire's size so that the new tire has the same In Aerodynamics, the aspect ratio of a wing is defined as the square of the wing span divided by the wing area Birds ( class Aves) are bipedal endothermic ( Warm-blooded) Vertebrate animals that lay eggs. See also Aberration in optical systems, Astigmatism (eye An Optical system with astigmatism is one where rays that propagate In Industrial design, product developers must choose numerous lengths distances diameters volumes and other characteristic quantities. 3 = 4:3
- Computer monitors (VGA, XGA, etc), SDTV
- 1. The term Video Graphics Array ( VGA) refers specifically to the display hardware first introduced with the IBM PS/2 line of computers in 1987, but through its widespread XGA, the Extended Graphics Array, is an IBM display standard introduced in 1990. 414… = √2:1
- International paper sizes (ISO 216)
- 1. A series Paper in the A series format has a 1\sqrt{2} aspect ratio although this is rounded to the nearest millimetre 5 = 3:2
- 35 mm film
- 1. 35 mm film is the basic Film gauge most commonly used for both still Photography and Motion pictures, and remains relatively unchanged since its 618…
- Golden ratio
- 1. In Mathematics and the Arts two quantities are in the Golden ratio if the Ratio between the sum of those quantities and the larger one is the 6 = 16:10 = 8:5
- 1. 6 = 15:9 = 5:3
- Widescreen computer monitors (WXGA, etc. A widescreen image is a film computer or television image with a wider and shorter aspect ratio than the standard Academy frame developed during the Classical Comparison chart WQUXGA display - 3840 x 2400 pixels (commercially available since Nov 2007 )
- 1. 7 = 16:9
- HDTV
See also
- Ratio
- Equidimensional ratios in 3D
Dictionary
aspect ratio
-noun
- The ratio of an object's longest dimension to its next-longest dimension.
- The ratio of width to height in a flat surface or 2-dimensional abstract construction, such as an image, character, or pixel. 4:3 (or 1.33:1) is the standard ratio for NTSC video. 1.85:1 and 2.35:1 are the most common aspect ratios for motion pictures.
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