The two-dimensional hollow turntable is a high-end scientific research instrument that integrates high-precision angle positioning and innovative structural design. Its core feature is the design of a through hole in the center of the platform, which provides unobstructed physical channels for optical paths, probes, or cables while achieving two-dimensional rotation around the pitch and azimuth axes. This design perfectly solves the spatial obstruction and signal interference problems faced by traditional solid turntables in complex system integration, and has become an indispensable basic equipment for modern cutting-edge laboratories