| 摘要 |
PURPOSE:To produce a lens of a complex shape without requiring a grinding or polishing stage by pouring sol contg. a metal alkoxide as starting material into a lens mold, converting the sol into gel, taking out the gel, taking out the gel, drying and sintering it. CONSTITUTION:Sol contg. a metal alkoxide such as tetraethoxysilane as starting material is poured into a lens mold and converted into gel. This gel is taken out, dehydrated by drying and sintered to produce a lens. Thus, the lens can be produced without carrying out grinding or polishing. This method is applicable to the production of a nonspherical lens. |
