A High Precision Dynamic Autocollimator

In order to increase the precision of a high speed dynamic autocollimator, which uses quadrate detector, we propose a new method to compensate the residual measuring errors. For this purpose, a multi-tooth rotary table with precision of 0.2 seconds of arc is used to calibrate the autocollimator. From the calibration data, a polynomial interpolation compensation algorithm is used. As a result, the measuring accuracy is increased to the order of 0.8 seconds of arc and the sampling speed is not affected.