Rayleigh criterion
The condition that two point sources are just resolved when the central maximum of one Airy disc coincides with the first minimum of the other, giving a minimum resolvable distance r = 0.61 lambda / NA.
The condition that two point sources are just resolved when the central maximum of one Airy disc coincides with the first minimum of the other, giving a minimum resolvable distance r = 0.61 lambda / NA.
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