为解决非接触式眼压计的量值溯源问题,深入分析了眼压检测中所涉及的Imber-Fick以及Glodmann眼压计的原理,设计了一套非接触式眼压计检定用模拟人眼装置,采用角膜与巩膜复合结构,控制模拟人眼在溯源和检测时相同的角膜变形量与内压预设值,并利用L型转矩平衡法,将模拟人眼的外部标准眼压值溯源至质量与长度.实验结果表明,装置具有良好的测量重复性和稳定性,分辨率高达1 Pa,且压力连续可调,整体扩展不确定度达到0.08 kPa(k =2).%To solve the value traceability of non-contact tonometer,through deeply analyzing of the Imber-Fick and Glodmann tonometer principle that involved in the intraocular pressure testing,a model eye device for non-contact tonometer is independently designed and developed,where the composite structure of the cornea and sclera,and the system correction method are adopted,the same corneal deformation and the inner pre-set pressure are controlled both during the testing and tracing,the external standard value of intraocular pressure are traced back to the quality and length,using a L-shaped torque balance.The experimental results show that the device has good repeatability and stability,where the resolution is up to 1 Pa,and pressure is continuously adjustable.The expanded uncertainty reaches at 0.08 kPa (k =2).
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