Numerical Analysis of Interference Patterns
Revision as of 15:10, 19 September 2007 by DemasMa (talk | contribs) (→Artificial Neural Network Method)
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Phase Shifting Technique
- requires three phase shifted fringe patterns
- the phase shift must be known
- carefully controlled conditions must be maintained
Fourier Analysis Method
- requires carrier frequency, narrow frequency, low noise and open fringes
- estimates the phase wrapped (via arctan)
Phase-Locked Loop Algorithm
- computer simulated oscillator (VCO) needed
- phase error b/w the fringe pattern and the VCO vanishes
Artificial Neural Network Method
- requires carrier phase
- non-algorithmic (i.e. must have learning phase)
- types of learning include: supervised, unsupervised and reinforcement
- multi-layer: input, output, hidden neurons present