New demands for modern production Nowadays, in modern manufacturing production, higher requirements for precision and efficiency have driven more demand for automation; Especially for quality inspection and control processes, the application of automated solutions can replace manual labor and complete more time-consuming and labor-intensive work. In order to help manufacturers meet the demand for automated quality testing, API has been leading and developing flexible automation solutions that meet the requirements of the times since its establishment. Therefore, the 9D LiDAR based on OFCI optical frequency domain interferometry measurement technology emerged. With its ultra-high measurement accuracy, extraordinary measurement efficiency, and automated non-contact measurement methods, it has become an outstanding solution that transcends the times in the field of large-sized precision measurement. Figure 1: API 9D LiDAR (9D LADAR) API 9D LiDAR The API 9D LiDAR adopts Optical Frequency Domain Interferometry (OFCI) technology, which is suitable for non-contact and accurate measurement of workpieces or target objects in various environments and complex working conditions such as workshops, laboratories, and fields. It has micrometer level measurement accuracy and extraordinary measurement efficiency, and can quickly measure the size of workpieces and capture surface point cloud data. When working, the 9D LiDAR generates broad-spectrum optical interference, detects signals, and collects measurement data. Its sensitivity is more than 100 times higher than t