Matthiessen's ratio: Difference between revisions
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In [[optics]], '''Matthiessen's ratio''' is the ratio between the distance from the centre of the [[lens]] to the [[objective]], versus the lens [[radius]]<ref name='shand'>{{Cite journal |
In [[optics]], '''Matthiessen's ratio''' is the ratio between the distance from the centre of the [[lens]] to the [[objective]], versus the lens [[radius]]<ref name='shand'>{{Cite journal |
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| issn = 0042-6989 |
| issn = 0042-6989 |
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Revision as of 14:54, 29 November 2010
 | This article focuses only on one specialized aspect of the subject. (October 2010) |
In optics, Matthiessen's ratio is the ratio between the distance from the centre of the lens to the objective, versus the lens radius[1].
This is of particular importance in fish, where the value may decrease from as high as 3.6 to 2.3[1], decreasing the focal ratio of the lens. A higher focal ratio is thought to compensate for the relatively high Matthiessen’s ratio brought about by constraints of small eye size during early development. This provides a means for larval fish to focus images from different distances, before the ability to accommodate is gained[1].
References
- ^ a b c Shand, J. (1999). "Optics of the developing fish eye: comparisons of Matthiessen's ratio and the focal length of the lens in the black bream Acanthopagrus butcheri (Sparidae, Teleostei)". Vision research. 39 (6): 1071–1078. ISSN 0042-6989.
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