玻璃透镜模压成形工艺试验研究

Experimental Study on Molding Process of Glass Lens

非球面玻璃透镜因具有较佳成像质量和成像分辨率广泛应用于高质量镜头,而玻璃模压成形技术在制造非球面玻璃透镜时具有成本低、效率高等优势.针对我国对非球面玻璃透镜模压成形技术尚未完全掌握的困境,对非球面模具的超精密磨削加工和玻璃透镜的模压成形工艺进行研究.采用B轴控制固定点斜轴磨削方式并结合形状误差补偿技术,获得形状精度为165nm,表面粗糙度为19nm的非球面碳化钨模具.选用低熔点DZK-3玻璃球,在精密模压成形机床上开展模压成形实验研究,确定了该玻璃的合适模压温度,研究了温度、速率等参数对形状精度和表面粗糙度的影响规律.

Aspheric glass lens is usually used as the high-quality camera lens because it can capture the high-quality and high-resolution images,and the glass molding process（GMP）has the advantages of low cost,suitable for mass production,meeting the need of environment protection and others.This paper dealt with GMP technique of ultra-precision grinding and molding process technology.Based on B-axis controlling and the fixed-point grinding and form error compensation technique,the high precision aspherical die was machined,the form accuracy of PV 165 nm,RMS 19 nm.The glass molding experiment which using the glass preform of spherical DZK-3was carried out on the multi-steps ultra-precision glass molding machine.The suitable range of molding temperature was obtained,and the relationship between molding parameters and profile deviation,surface roughness was studied.