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提出了一种采用光学投影成像和自扫描光电二极管列阵(SSPA)传感器实现隐形眼镜曲率、光学中心厚度和直径测量的新方法,基于此方法设计成功了一种新型隐形眼镜投影测量仪。介绍了仪器的测量原理、仪器结构、光电二极管列阵信号采集以及单片机控制系统的硬件和软件设计。该测量仪测量镜片曲率半径的精度优于±0.1mm,测量镜片光学中心厚度的精度优于±0.01mm,测量镜片直径的精度优于±0.1mm,并能分辨镜片上任何方向大于0.01mm的杂质和表面缺陷。
A new method for measuring contact lens curvature, optical center thickness and diameter using optical projection imaging and self-scanning photodiode array (SSPA) sensor is proposed. Based on this method, a new type of contact lens projection measuring instrument is successfully designed. The measuring principle, instrument structure, signal acquisition of photodiode array and the hardware and software design of SCM control system are introduced. The measuring instrument measures the curvature radius of the lens better than ± 0.1mm, the accuracy of measuring the optical center thickness of the lens is better than ± 0.01mm, the accuracy of measuring the lens diameter is better than ± 0.1mm, and the resolution of the lens in any direction greater than 0.01mm Impurities and surface defects.