CAJ | 학술논문

为了降低眼球的自动调节功能对屈光度测量的影响，建立了敞开视窗型自然验光仪光学系统。对该系统的光学成像特性、屈光度测量方法等进行研究，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。首先，介绍了敞开视窗型自然验光仪的光路结构及工作原理。接着，通过理论分析得出屈光度与远点距之间的关系，并提出环厚法用于测量远点距。然后，在Zemax软件中建立相应的光学模型进行仿真测试，最后，通过搭建相应的光学系统对九种模拟眼进行实验测量。实验结果表明：九种模拟眼测量的相对误差控制在7%以内。该光学系统具备结构紧凑、成本低、准确、稳定可靠等特点，能够满足屈光度测量的要求。
위료강저안구적자동조절공능대굴광도측량적영향，건립료창개시창형자연험광의광학계통。대해계통적광학성상특성、굴광도측량방법등진행연구，제출료일충통과측량안저반사상배적후도래험광적방법（간칭배후법），동시환설계료일조괄합배후법적조초광로래실현。수선，개소료창개시창형자연험광의적광로결구급공작원리。접착，통과이론분석득출굴광도여원점거지간적관계，병제출배후법용우측량원점거。연후，재Zemax연건중건립상응적광학모형진행방진측시，최후，통과탑건상응적광학계통대구충모의안진행실험측량。실험결과표명：구충모의안측량적상대오차공제재7%이내。해광학계통구비결구긴주、성본저、준학、은정가고등특점，능구만족굴광도측량적요구。
In order to reduce the impact of eye’s self-control on the diopter measuring, an open-view optical system of natural refractor is established and its optical imaging characteristics and diopter measuring method are investigated. And a method of optometry by measuring the ring thick of the reflection image, rings thick method for short, is proposed. Firstly, the optical path of the open windows type natural refractor and its working principle are introduced. Next, the relationship between diopter and far point distance is obtained through theoretical analysis and the ring thick method is proposed to measure the far point distant. Then, build related eye models to verify the optical system’s simulation performance by Zemax. Finally, set up the related optical system to test nine simulation eyes. The experimental results indicate that the relative error of the nine simulation eyes is controlled within 7%. These results satisfy the requirement of diopter measuring very well and the optical system is characterized by compact structure, low cost, good accuracy, and high stability.