The surface testing of aspheric and optical part is especially difficult, which is big scale and high precision.
尤其是大型高精度的非球面光学零件，面形检测难度更大。
2
The further research may provide an effective and reliable quantitative testing method for the exact-grinding and initial polishing of aspheric surfaces.
它的深入研究，将为大口径非球面精磨和初抛光阶段提供一种有效、可靠的定量检测手段。
3
The mold employed fluidcylinder, secondary gate, secondary locating with pyramidal face and guide pillars, which ensured the precision of the plastic aspheric lens.