建立了非共轴阵列照明下的眼底成像数学模型，采用照明光路与成像光路独立设计方法，提出了一种微小型眼底相机光学系统，以避免传统眼底相机中人眼角膜与网膜物镜反射杂光对视网膜图像的干扰.设计了6阵列环形光源照明光路系统，长度仅17.9 mm，实现眼底视网膜有效照明线视场不小于12 mm；成像光路系统采用二次成像设计，光学调制传递函数优于0.2@91 lp/mm，畸变小于5%，长度仅为75 mm.仿真与设计结果表明，该眼底相机光学系统有效抑制了光路中的杂散光，有利于获得高对比度视网膜图像.研究结果可为高像质、小型化以及低杂光眼底相机发展提供设计参考.

The mathematical model of fundus imaging under the non-coaxial array illumination is established. A micro optical system of fundus camera is proposed by using the independent design method of illumination light path and imaging light path, which avoids the interference of human cornea and omental objective reflected light on the retina image in the traditional fundus camera. The design of 6-array ring light source illumination system is completed, which is only 17.9 mm in length and the effective illumination line field of fundus retina is not less than 12 mm. The secondary imaging design is adopted in the imaging optical system.The modulation transfer function is better than 0.2@91 lp/mm and the distortion is less than 5% with 75 mm length. The simulation and design results show that the optical system of the proposed fundus camera can effectively suppress the stray light in the optical path which is conducive to obtaining high contrast retinal image. The results can provide a design reference for the development of high image quality, miniaturization and low stray light fundus camera.