Frequency, phase and amplitude determining method for e.g. frequency-scanning interferometry, involves accomplishing common adjustment and optimization of correction table, window function and/or interpolation

• Main Authors: TRITTLER, STEFAN, WIELER, MATTHIAS
• Format: Patent
• Language: English; German
• Published: 14.08.2008
• Subjects: COLORIMETRY; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; RADIATION PYROMETRY; TESTING

The method involves filtering input data with a window function, and accomplishing an evaluation of the input data by a fast fourier transformation (FFT). Situation of maximum of an amount of FFT-coefficient is determined, and an interpolation with help of the FFT-coefficient is accomplished. A freq...