自然验光仪光学系统的研究与设计

发布时间：2018-02-25 04:02

本文关键词： 视觉光学自然验光仪环厚法调焦光路屈光度 zemax　出处：《浙江工业大学》2012年硕士论文　论文类型：学位论文

【摘要】：光学系统作为自然验光仪的核心系统，直接关系到自然验光仪的性能和测量结果。基于各类验光仪光学系统的特性的研究，提出一种敞开视窗型光路结构代替雾视光学系统，以达到限制眼球自动调节能力的目的。基于所设计的敞开视窗型自然验光仪光路结构，通过理论分析和实验方法研究其光学成像特性，提出了一种通过测量眼底反射像环的厚度来验光的方法（简称环厚法），同时还设计了一组适合环厚法的调焦光路来实现。通过研究验光仪中调焦光学系统的光学成像特性，首先建立了调焦组的移动量与屈光度之间的关系，，设计了系统的初始结构参数，从而在Zemax中建立相应的调焦光学模型。同时，在Zemax中还建立了-20D，-15D，-10D，-5D，0D，5D，10D，15D，20D这九种人眼模型，以及整个敞开视窗型的光路结构。最后通过zemax的建模优化功能确定光学系统的设计参数，并用该光学系统对上述九种人眼模型进行模拟验光，其相对误差在6%以内。实际搭建相应的测试平台对上述九种标准模拟眼进行实验测量,其相对误差在7%以内。测量结果分析表明，运用所设计的自然验光仪光学系统进行验光具有较高的可靠性。
[Abstract]:As the core system of the natural optometry , the optical system is directly related to the performance and measurement results of the natural optometry . Based on the study of the characteristics of the optical system of various kinds of optometry instruments , an open window type optical path structure is proposed instead of the fog optic optical system to achieve the purpose of limiting the automatic adjustment ability of the eyeball . Based on the design of the optical path structure of the open window type natural optometry instrument , the optical imaging characteristics of an eye fundus reflection image ring are studied by theoretical analysis and experimental method , and a set of focusing optical paths suitable for the ring thickness method are also designed . The initial structural parameters of the system are designed based on the relation between the movement quantity and the power of the focal group , and the corresponding focusing optical model is established in Zemax , and the nine human eye models of -20D , -15d , -10D , -5D , 0D , 5D , 10D , 15d , 20D , 20D are also established in Zemax , and the optical path structure of the whole open window type is established . Finally , the design parameters of the optical system are determined through the modeling optimization function of zemax . The relative error is within 6 % . The relative error is less than 7 % . The measurement results show that the optical system of the designed natural optometry has higher reliability .

【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH786

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