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J. Schlarp, E. Csencsics, G. Schitter:
"Influence of Scheimpflug condition on measurements of a scanning laser line sensor for 3D imaging";
Talk: XXII World Congress of the International Measurement Confederation (IMEKO), Belfast (UK); 09-03-2018 - 09-06-2018; in: "XXII World Congress of the International Measurement Confederation (IMEKO)", (2018), 4 pages.

Satisfying the Scheimpflug condition in a rotational scanning 3D triangulation sensor system can be challenging. By violating this condition an reproducible measurement error is generated, which is caused by the out of focus projected laser point on the detector. In this work a ray-tracing simulation of the scanning system is performed, in order to determine potential aberrations. With the reference measurement of a at surface the error due to violation of the Scheimpflug condition is obtained. The error is systematic and reproducible and can be compensated by a correction polynomial, with coefficients determined by using the least squares method. Experimental results reveal, that the measurement error can be significantly reduced by the correction polynomial.

https://publik.tuwien.ac.at/files/publik_271208.pdf