手机镜片非球面面形精度PV评价标准分析

PV Evaluation Standard Analysis of Mobile Phone Lens Aspheric Surface Accuracy

光学元件的面形精度是评价其是否符合要求的重要指标,一般使用峰谷PV值作为评价标准,即元件表面最高点与最低点的差值。PV值在用UA3P检测仪进行测量时具有较大的波动性,易受环境影响。为更有效地对手机镜片非球面面形精度做出评价,通过实验检讨了三种评价标准PV、PV、PVq对真实表面的反映情况,结果显示PV、PVq对环境因素相对不敏感,可以在一定程度上排除脏污点等奇异点对测量结果的不良影响;同时证明PV、PVq对检测精度的变化相对不敏感,以及在批次生产中具有较好的评价稳定性。

Optical surface accuracy is an important index to determine whether optical components accord with requirements. Peak-to-valley （PV） value used as an evaluation standard is the difference between the highest point and the lowest point of the surface. PV value detected by UA3P detector has great variation, which is easy to be af-fected by environment. In order to evaluate the accuracy of mobile phone lens aspheric surface more effectively, three evaluation standards of PV, PV20 and PVq to reflect the actual surface are discussed through experiments. The results show that PV20 and PVq are relatively insensitive to environment factors and the adverse effects on measure-ment results from singular points such as dirty points can be eliminated to some extent. Meanwhile, it is proved that PV20 and PVq are relatively insensitive to detection accuracy variation and they have better evaluation stability in batch production.