METHOD FOR MANUFACTURING SINGLE CRYSTAL OPTICAL LENS

摘要

The invention provides a fabrication process for single-crystal optical lenses wherein, in a processing step for a single-crystal lens, at least one heating treatment is implemented after a member is cut out of a single-crystal matrix material having a melting point of greater than 2,000°C to less than 2,900°C and before a lens assembling step. In this case, the heating treatment is preferably implemented at a temperature that is 0.50 times to 0.67 times as high as the melting point.