Analysis and compensation method for installation error in measuring gear tooth flank with laser interferometry

The installation position errors of a measured gear are unavoidable when measuring gear tooth flank form deviation with laser interferometry, causing mistakes when using the simulated phase difference as a measurement reference to calculate the form deviation. In order to avoid manufacturing many standard gears as measurement references, a compensation method for the installation errors of the measured gear has been developed. In this process, the actual installation position of the measured gear can be traced by modifying the theoretical position parameters using the ray-tracing method. Experimental results show that this method is feasible. Thus, the simulated phase difference that compensate for installation errors can be utilized as a measurement reference in calculating the form deviation of the measured gear.