Precise measurement of fibers position using bundle adjustment algorithm

The focal plane of The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) is installed with 4000 optical fibers, and these fibers should precisely align the celestial target when the astronomical observation is performing. Hence, the precise coordinate of the fiber end is obligatory for tracking the celestial target. In order to acquire the precise coordinate of the fiber end on the focal plane of LAMOST, a novel algorithm for fiber end positioning based on the bundle adjustment and laser tracker is proposed in this paper. The bundle adjustment algorithm applied in the project has been implemented with special emphasis on accuracy and performance efficiency. The preliminary results show that this new bundle adjustment calibration algorithm can achieve better accuracy than conventional calibration method.