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

(a) Scheme of the tilt and wobble motion during the experiment. (b) Two separated coordinates are used to describe the effects by the tilt and wobble. The height from the laser to the plane of the turntable is h + H.