已经表明，研磨至接近完成的尺寸对于降低制造成本和提高成品圆顶的质量很重要。 使用这种方法，可以将与各向异性和地下破坏有关的光学畸变问题降至最低。 地下损伤已显示会降低蓝宝石的强度。 已经量化了地下破坏的深度，并且显示出可以通过抛光后热处理来提高室温强度。
However, the extremely high hardness and brittleness of sapphire make it difficult to obtain defect-free surfaces. The surface/subsurface damages induced by brittle fracture would reduce sapphire's strength and increase the subsequent polishing time. Therefore, the material removal mode, brittle or ductile, plays a vital role in quality control of the machined surface.
You can call us and get the more information, we also supply all kinds of Spherical Lenses, waiting for your calling.