EXTENDED AVERAGING AND DATA WINDOWING TECHNIQUES IN PHASE-STEPPING MEASUREMENTS - AN APPROACH USING THE CHARACTERISTIC POLYNOMIAL THEORY

The extended averaging technique and the data windowing technique used in phase-stepping are investigated using the characteristic polynomia ls. II is shown that the phase measurement algorithms derived using th e extended averaging technique are not in general more efficient and m ay require more samples than those obtained directly from the rules of the characteristic polynomial theory. (C) 1998 Society of Photo-Optic al Instrumentation Engineers.