Figure 5.

The voltage-to-angle relationships of the sensing channels CH${}_1$ and CH${}_3$ of the optical sensor. CH${}_1$_clockwise and CH${}_1$_anticlock represent the outputs of CH${}_1$ when the sensor rotates from −100${}^{\circ }$ to 100${}^{\circ }$, and then back to −100${}^{\circ }$. CH${}_1$_predicted is the predicted output value of channel CH${}_1$. Similarly, CH${}_3$_clockwise, CH${}_3$_anticlock, and CH${}_3$_predicted represent the corresponding readings of CH${}_3$.