With the growing role played by optical devices in measurement, communication, and photonics, there is a clear need for characterizing optical components. A basic and useful parameter, especially for imaging systems, is the Modulation Transfer Function, or MTF. Over the past few decades new instruments, including the laser interferometer, the CCD Camera, and the Computer have revolutionized the measurement and calculation of the MTF. This has made what was once a tedious and involved process into virtually an instantaneous measurement.