菲涅尔微棱镜对成像对比度影响的实验研究（英文）  

Experimental Study on Contract Sensitivity for Fresnel Microprisms

作　　者：付明磊 范婷超[2] EUGENE Antonov 陆春校 张文其 来进晟 DMYTRO Manko FU Ming-lei;FAN Ting-chao;EUGENE Antonov;LU Chun-xiao;ZHANG Wen-qi;LAI Jin-sheng;DMYTRO Manko(Zhejiang Fuchunjiang Communication Group Co.,Ltd,Hangzhou 311499,China;College of Sciences,Zhejiang University of Technology,Hangzhou 310023,China;Institute for Information Recording of National Academy of Sciences of Ukraine,Kiev 03113,Ukraine;Yiwu Academy of Science and Technology,Zhejiang University of Technology,Yiwu,Zhejiang 322001,China)

机构地区：[1]浙江富春江通信集团有限公司,杭州311499 [2]浙江工业大学理学院,杭州310023 [3]乌克兰国家科学院信息记录研究所,乌克兰基辅03113 [4]浙江工业大学义乌科学技术研究院,浙江义乌322001

出　　处：《光子学报》2019年第12期128-134,共7页Acta Photonica Sinica

基　　金：International Science and Technology Cooperation"Belt and Road" Special Project of Zhejiang Province(No.2015C04005)

摘　　要：模拟眼科诊断中常用的视标测试法,搭建了测试对象通过菲涅耳微棱镜的成像系统,使用光电探测法测试成像的分辨率,获得了不同对比度视标条件下的实验数据.实验结果表明,通过成像系统获得的实验数据与传统的视标测试法获得的临床数据具有一致性.同时,随着使用的菲涅耳微棱镜棱镜度数增大,视标对比度呈现近似等比例下降规律.实验结果分析得出,色散和衍射是引起菲涅耳微棱镜成像对比度恶化的主要原因,并提出了一种采用带有喷涂铬层的中性玻璃滤光片提高成像对比度的解决方案.Optotype test method in the field of ophthalmic diagnosis was simulated.The contrast sensitivity of visual images through Fresnel microprisms was investigated.An imaging system for stroke test objects through Fresnel microprisms was set up.Experimental data on contract were obtained using new electronic method for registering the resolution of test stroke images.The experimental data obtained by the imaging system is consistent with the visual acuity data obtained by the traditional optotype test method.It was stated that applying microprisms noticeably reduce the contrast of test stroke optotypes which is diminishing proportionally to the prism strength and to the initial contrast value of the optotypes.The main reason for the reducing of the contrast and for the worsening of the resolution of optical images when using prisms is the white light chromatism and the diffraction of light beams at the microrelief of microprisms with different prismatic strength.The practical ways for the diminishing effect of reducing the contrast of the test optotypes are proposed by adopting the neutral glass filters with a sprayed layer of chromium.

关 键 词：菲涅尔微棱镜 光学图像 对比度 视敏度 视标测试 

分 类 号：O439[机械工程—光学工程] O435[理学—光学]