Analysis of optimal detection range performance of LiDAR systems applying coaxial optics

In this study, the optimal detection range performance of a LiDAR system employing coaxial optics is analyzed. On analyzing laser beam diameter, beam divergence angle, light-receiving area, and receiving light intensity, the optimal detection range was exhibited when the collimator focal length was 6.5 mm, the laser-beam divergence angle was 1.23 mrad, and the hole of the receiving mirror was 1.4 mm. Furthermore, the maximum deviation of the optical scan angles with respect to the mechanical angles of the polygon mirror and the MEMS mirror were analyzed as -0.99° and +4.54° in the x-axis and y-axis directions, respectively.