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Line 12: and <math>(\xi,\eta)</math> are spatial frequency in the x- and y-plane, respectively. The OTF accounts for [[aberration in optical systems\|aberration]]~~, which the limiting frequency expression above does not~~. The magnitude is known as the '''Modulation Transfer Function (MTF)''' and the phase portion is known as the '''Phase Transfer Function (PTF)'''. In imaging systems, the phase component is typically not captured by the sensor. Thus, the important measure with respect to imaging systems is the MTF.

Optical transfer function: Difference between revisions