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. (December 2009)
diffraction pattern matching Dawes' limit
Dawes' limit is a formula to express the maximum resolving power of a microscope or telescope. It is so named after its discoverer, W. R. Dawes
, although it is also credited to Lord Rayleigh.
The formula takes different forms depending on the units.
|R = 4.56/D
||D in inches, R in arcseconds
|R = 11.6/D
||D in centimeters, R in arcseconds
||D is the diameter of the main lens (aperture)
||R is the resolving power of the instrument
- ^ Dawes, W.R., Catalogue of Micrometrical Measurements of Double Stars.
In: Memoirs of the Royal Astronomical Society, Vol. 35, p.137 1867, Bibcode: 1867MmRAS..35..137D