| 摘要 |
A method for forming a preform mass of thermoplastic material into a lens by compression molding between a pair of molds without the formation of air bubbles or the entrapment of air pockets in the finished lens by preheating the preform mass and molds, and further continuing to apply increased pressure while increasing the temperature or maintaining a predetermined temperature and pressure until the mass has been compressed between the two molds into the shape of a substantially finished lens.
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