Method for measuring eccentric angle of turntable with continuous modulation period and transposition compensation

The invention relates to a method for measuring an eccentric angle of a turntable with continuous modulation period and transposition compensation, which comprises the following steps of: calculating an eccentric angle by continuously measuring a periodic value of a turntable light modulation signal and a periodic change value in a circle of the turntable and an accumulated value of measured periodic values in a half circle; the calculation error when the number of scribed lines or teeth of the turntable is an odd number in an earlier-stage proposed method is corrected; in order to avoid an abnormal turntable eccentric angle calculation value caused by a periodic variation value error of an angle near +/-pi/2 multiple, a transposition calculation angle compensation method is adopted. The method serves as a low-cost and high-efficiency all-round dead-angle-free eccentric angle measuring method, and provides a basis for adjusting the eccentricity or coaxiality of a turntable type component. 本发明涉及一种连续调制周期和转位补偿的转