LBTEK 16 mm Coaxial Alignment Plate is a rapid embedded beam alignment tool with a through-hole at the center, providing convenience for beam alignment and simplifying the optical path collimation process. In beam focusing applications, its central through-hole facilitates viewing the position of the focused spot; typically, the beam at the focal point can pass directly through the hole. By sliding the coaxial rod back and forth along the optical path, one can observe the spot position to determine whether the optical path is coaxial with the coaxial system.