Spherical lenses are important optical components, mainly made of materials such as optical glass, for coupling between optical fibers, between lasers and optical fibers, and between optical fibers and detectors, or for the collimation of fiber beams in thin-film filtration dense wavelength division multiplexers.Spherical lenses are also known as glass beads. It is a solid or hollow glass bead with a diameter of several microns to tens of microns, and its application fields involve various departments such as chemical industry, military industry, aerospace, transportation, petroleum, light industry, and medical treatment. It has the characteristics of good surface finish, good light reflectivity, directional reflectivity, high impact strength, chemical stability, light bulk density and so on