In the optical systems field, key components such as spectroscopic elements often require the use of optical materials with high-refractive indices to achieve miniaturization and lightweight characteristics. However, high-refractive index optical materials have low machinability due to their brittle characteristic. In this study, we investigated the changes in surface characteristics during precision pattern machining of high-refractive index materials; specifically, a low fracture toughness, for use in grating spectroscopic elements. The experiment involved diamond turning for the primary machining, and for the secondary pattern machining, the tool rake angle, tool feed rate, and depth of cut were set as variable conditions. Surface roughness measurements and surface quality analyses were carried out using a white-light interferometer and tool microscopy. The results provide insights into the influence of conditions on the surface properties during the machining of high-refractive index materials for grating spectroscopic components. Under the machining conditions with a tool rake angle of -65o, tool feed rate of 5,000 mm/min, and a depth of cut 10 nm, the surface roughness of Ra 8.0 nm was achieved. Based on these findings, we plan to conduct further research on the mechanical fabrication of the blaze angle for grating spectroscopic components.

The Store Automatic Fixing Equipment operates as an external force acting on fixing the Store during the flight and as a device designed to prevent the Store from being shaken when the aircraft is flying with the Store. In this paper, we derived the mathematical modeling of the Store Automatic Fixing Equipment through the analysis of the operating principles of the Equipment. The gap occurred by the external vibration forces was calculated through the mathematical model and structure analysis. And then the shape and stiffness design of the wedge, i.e., the Store Automatic Fixing Equipment was derived by the mathematical modeling and structural analysis. We made the Store Automatic Fixing Equipment and took the vibration testing under the aircraft flight conditions. We used the load cell to measure the reaction forces acting on the gap between the Store Automatic Fixing Equipment and the Store. The results of the reaction force measurements were compared with the analysis results of the design and the suitability of the Store Automatic Fixing Equipment’s design was verified based on the analysis.