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眼底成像仪的相机光学系统由照明系统和成像系统组成,其中照明系统设有固视光源、可见照明光源和近红外对焦光源,采用近红外光源对焦可以不用药物对眼睛进行散瞳处理。在成像系统中设置调焦镜,具备±20D 的屈光度补偿功能。
工作距离 Working distance |
>24mm | ||||||||||||||||||||||||||||||
成像模式 Imaging mode |
近红外观察、对焦,可见光拍照 Near-infrared observation,focusing,visible light photography |
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瞳孔大小 Pupil size |
免散瞳3mm Dilation-free 3mm |
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视网膜分辨率 Retinal resolution |
中心视场优于7 μm,边缘视场优于15μm Central field of view better than 7 μ m edge field of view better than 15 μ m |
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屈光度补偿范围 Refractive compensation range |
-20D~+20D | ||||||||||||||||||||||||||||||
视场 Field of view |
45° | ||||||||||||||||||||||||||||||
成像谱段 Imaging spectrum |
可见光: RGB彩色(450- 700) Visible light:RGB color(450-700) 近红外 780nm Near Infrared:780nm 固视光:650nm Fixation light:650nm |
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MTF | 大于0.2@分辨率对应像方线对 Greater than 0.2@resolution corresponding image side line pairs |