人眼实际观察状态下的自由曲面眼镜片的透射波前像差测量

Measurement of Transmission Wavefront Aberration of Freeform Spectacle Lenses in Real Viewing Condition of Human Eye

基于人眼-镜片联合模型提出了一种实际观察状态下测量自由曲面镜片波前像差的方法,该方法不同于焦度计及现有的哈特曼-夏克波前像差传感器测量眼镜片后表面波前像差的方法。阐述了一种在实际观察状态下眼镜片顶球面上的波前像差测量方法的原理。基于该原理设计、研制了相应的测量装置,并使用该测量装置自动扫描测量得到眼镜片顶球面上的波前像差和配戴者屈光度参数。实验结果验证了该测量装量可以实现模拟实际观察状态下自由曲面镜片波前像差的测量,有助于评价自由曲面镜片的成像质量和加工质量,以及指导镜片的设计和优化。

A wavefront aberration measurement method for freeform spectacle lenses in real viewing condition is proposed based on the human eye-spectacle lens model.The method is different from the existing focimeter and the Hartmann-Shack wavefront aberration measurement method in which the wavefront aberration on the back surface of spectacle lenses is measured.The principle of wavefront aberration measurement for spectacle lenses on its vertex sphere in real viewing condition is demonstrated.Based on the principle,the corresponding experimental measurement apparatus is designed and built.Experiments of scanning and measuring spectacle lenses are carried out to obtain the wavefront aberration and wearer power on the vertex sphere.The measurement results verify that wavefront aberration measurement for freeform spectacle lenses in real viewing condition can be achieved by the proposed method.The findings assist in evaluating the manufacturing and image qualities of freeform spectacle lenses.The results also guide design and optimization of the lenses.