Abstract: The knowledge of where one has measured the response of a structure is sometimes as important as the response measured. This paper describes a method for the calibration of the horizontal and vertical scanners in a laser Doppler vibrometer. The residual of the scanner position with respect to a first-order and second-order regression model will be discussed. Comparisons will be made to vendor measured scanner characteristics. Detailed analysis of the scanner calibration data will result in a very accurate knowledge of where the measured data from a structure is located and directed. Moreover, this knowledge will enhance the accuracy of 3D laser vibrometry. !12
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