David L. Fried: Difference between revisions
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'''David L. Fried''' is a [[scientist]], best known for his contributions to [[ |
'''David L. Fried''' is a [[scientist]], best known for his contributions to [[optics]]. Fried described what has come to be known as '''Fried's seeing diameter''', or '''r0''' (usually pronounced r-naught). The seeing diameter is effectively a limiting aperture due to atmospheric turbulence, and is found either empirically or statistically. The seeing diameter limits optical resolution. Note that it is a diameter, not a radius, even though r is used as the variable. |
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Typical values for Fried's seeing diameter in the visible spectrum may range from less than 1 cm (you can detect turbulence with your eye) to 20 cm on [[Haleakala|Mt. Haleakala]]. |
Typical values for Fried's seeing diameter in the visible spectrum may range from less than 1 cm (you can detect turbulence with your eye) to 20 cm on [[Haleakala|Mt. Haleakala]]. |
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* Fried, D. L. (1966) "Optical resolution through a randomly inhomogeneous medium for very long and very short exposures", J. Opt. Soc. Amer. 56:1372-9 |
* Fried, D. L. (1966) "Optical resolution through a randomly inhomogeneous medium for very long and very short exposures", J. Opt. Soc. Amer. 56:1372-9 |
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* Fried, D. L. (1965) "Statistics of a Geometric Representation of Wavefront Distortion", J. Opt. Soc. Amer., 55:1427-1435. |
* Fried, D. L. (1965) "Statistics of a Geometric Representation of Wavefront Distortion", J. Opt. Soc. Amer., 55:1427-1435. |
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[[Category:Physicists|Fried, David L]] |
[[Category:Physicists|Fried, David L]] |
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Revision as of 01:21, 16 October 2006
David L. Fried is a scientist, best known for his contributions to optics. Fried described what has come to be known as Fried's seeing diameter, or r0 (usually pronounced r-naught). The seeing diameter is effectively a limiting aperture due to atmospheric turbulence, and is found either empirically or statistically. The seeing diameter limits optical resolution. Note that it is a diameter, not a radius, even though r is used as the variable.
Typical values for Fried's seeing diameter in the visible spectrum may range from less than 1 cm (you can detect turbulence with your eye) to 20 cm on Mt. Haleakala.
References
- Fried, D. L. (1966) "Optical resolution through a randomly inhomogeneous medium for very long and very short exposures", J. Opt. Soc. Amer. 56:1372-9
- Fried, D. L. (1965) "Statistics of a Geometric Representation of Wavefront Distortion", J. Opt. Soc. Amer., 55:1427-1435.
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