LBTEK TS series 1-inch optical mounts are designed for mounting optical components with a mounted diameter of 25.4 mm, supporting both left-handed and right-handed mounting configurations. They are equipped with M6×0.25 precision adjustment screws, enabling angular adjustment of ±4° in both yaw and pitch directions. After wide-temperature-range cycling tests over 15°C, the yaw/pitch angular drift of TS mounts can be controlled within 4 μrad. To more comprehensively evaluate actual positional deviations in two-dimensional space, LBTEK adopts a composite drift index as the statistical criterion. This composite metric is stricter than traditional single-axis drift analysis and more accurately reflects the stability of the mount under biaxial coupling effects. Based on this standard, the composite value of the TS series is limited to within 5 μrad. For detailed test methods and data, please refer to the curve section.