Error analysis and improvements for using parallel-shift method to test a galvanometer-based laser scanning system

William Xinzuo Li; Larry D. Mitchell

doi:10.1117/12.185301

8 September 1994 Error analysis and improvements for using parallel-shift method to test a galvanometer-based laser scanning system

William Xinzuo Li, Larry D. Mitchell

Author Affiliations +

Proceedings Volume 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (1994) https://doi.org/10.1117/12.185301
Event: Vibration Measurements by Laser Techniques: First International Conference, 1994, Ancona, Italy

Abstract

The Scanning Laser Doppler Vibrometry (SLDV) technique has brought modal testing into a new era. A galvanometer-based laser scanning system for SLDV provides the position accuracy, speed, and flexibility for data acquisition. Testing and calibrating such a scanning system to meet the precision requirements of modal testing has led to the development of the novel parallel-shift method for testing and calibration of the scanning system. This parallel-shift method can provide a cost-effect means for systematic laser scanning accuracy test. However, a number of measurement errors could be involved during the scanning accuracy test. These errors could severally affect the accuracy of the test itself. It is necessary to quantitatively determine the effects of the measurement errors to evaluate and to improve the accuracy of the test. This paper gives a detailed analysis for all the errors involved in the galvanometer-based laser scanning accuracy test using the parallel-shift method. Improvements of the test setup and test procedure are also proposed.

Citation Download Citation

William Xinzuo Li and Larry D. Mitchell "Error analysis and improvements for using parallel-shift method to test a galvanometer-based laser scanning system", Proc. SPIE 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (8 September 1994); https://doi.org/10.1117/12.185301

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