Yt. Yang et al., APPLICATION OF AN ADAPTIVE NOISE CANCELING TECHNIQUE TO A STRAIGHTNESS MEASUREMENT SYSTEM BASED ON OPTICAL-ACTIVITY, Optical engineering, 34(1), 1995, pp. 21-25
The theory and methods of adaptive noise cancelling (ANC) are discusse
d briefly. By theoretical analysis and experimental studies, the ANC t
echnique is successfully applied in the straightness measurement syste
m based on optical activity. The experimental results of various align
ment measurements for long and short distances are processed by the AN
C technique, and it shows that the compensation effect after filtering
under different conditions is 30% to 80%.