Share Email Print
cover

Proceedings Paper

Comparison of multiframe phase-shifting algorithms with unknown value of phase shift
Author(s): Jiri Novak; Antonin Miks
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Our work analyzes several multiframe phase-shifting algorithms with unknown values of phase shifts. The presented paper offers new algorithms for evaluation of phase values in interferometric measurements. Nonlinear multi-frame phase-shifting algorithms, which use five, six and seven intensity frames to determine phase values in interferometric measurements, are described theoretically. The proposed algorithms compensate for linear phase-shift errors, i.e. miscalibration of phase-shift, which are very common in practice of interferometric measurements. The phase-shift value is assumed unknown but constant in these algorithms, so that at least four phase shifted intensity frames have to be recorded. An advantage of the described algorithms is a possibility of pointwise phase-shift calculation. An analysis of proposed algorithms with respect to possible influences on the process of interferometric measurements is also carried out. Several important potential error sources were chosen and the sensitivity and accuracy of phase evaluation algorithms was compared. The algorithms derived in this work can be used in any phase-shifting measurement technique and they offer the advantage of insensitivity to the linear phase-shift errors.

Paper Details

Date Published: 30 May 2003
PDF: 10 pages
Proc. SPIE 5144, Optical Measurement Systems for Industrial Inspection III, (30 May 2003); doi: 10.1117/12.500553
Show Author Affiliations
Jiri Novak, Czech Technical Univ. (Czech Republic)
Antonin Miks, Czech Technical Univ. (Czech Republic)


Published in SPIE Proceedings Vol. 5144:
Optical Measurement Systems for Industrial Inspection III
Wolfgang Osten; Malgorzata Kujawinska; Katherine Creath, Editor(s)

© SPIE. Terms of Use
Back to Top