New measuring method of fiber alignment in precision torsion pendulum experiments
Wang Bing-Jie, Xu Li, Zeng Wei-You, Wang Qing-Lan
       

(a) Summarizing the grayscale by column to get the distribution in the horizonal direction. The diffraction pattern shows symmetrically besides the two edges. (b) Searching the local maximum change in the manual chosen range to determine the center of the torsion fiber.