Optimizing phase-shift algorithm for incoherent optical distance measurement

Holger Hess; Martin Albrecht; Markus Grothof; Stephan Hussmann; Nikolaos Oikonomidis; Rudolf Schwarte

doi:10.1117/12.486736

21 August 2003 Optimizing phase-shift algorithm for incoherent optical distance measurement

Holger Hess, Martin Albrecht, Markus Grothof, Stephan Hussmann, Nikolaos Oikonomidis, Rudolf Schwarte

Proceedings Volume 5086, Laser Radar Technology and Applications VIII; (2003) https://doi.org/10.1117/12.486736
Event: AeroSense 2003, 2003, Orlando, Florida, United States

Abstract

Many concepts for incoherent optical distance measurement, based on the time-of-flight (TOF) principle, are discussed in the past, but they differ in complexity and accuracy. The used modulation techniques and evaluations methods require different signal sources, which are controllable in frequency or phase delay in high precision. Development effort and outlay of TOF-systems will be reduced with the use of standard logic devices. The restrictions of these devices permit a limited number of phase or frequency steps, but the combination of standard logic devices and the principle of Phase-Shift Interferometry (PSI) offers the possibility to design a plain and precise system, at very low cost. Over the past 20 years many evaluation algorithms for PSI have been presented in different applications. The phase angle of an ideal interferogram is determinable with only three or four sampling values, but the usage of more sampling values will suppress emitter and detector non-linearities, phase shift errors and noise generally. This paper will present the design of the optimal phase-shift algorithm based on Fourier analysis of the complete recorded interferogram.

Citation Download Citation

Holger Hess, Martin Albrecht, Markus Grothof, Stephan Hussmann, Nikolaos Oikonomidis, and Rudolf Schwarte "Optimizing phase-shift algorithm for incoherent optical distance measurement", Proc. SPIE 5086, Laser Radar Technology and Applications VIII, (21 August 2003); https://doi.org/10.1117/12.486736

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