摘要目的 按照变焦光学系统设计原理,设计一款可供电子助视器使用的10X变倍比的有限远共轭距连续变焦光学系统.方法 利用高斯光学原理进行变焦光学系统初始结构设计,利用光学设计软件对系统进行像差校正和件能评价,包括调制传递函数(MTF)、点列图和弥散斑直径分析,并通过公差灵敏度分析和蒙特卡罗法对变焦光学系统的容差能力进行研究.结果 所设计的变焦光学系统为四组元结构,分前固定组、变倍组、中间固定组和补偿组,共10片透镜,采用机械补偿方式,光学筒长84 mm,前截距316 mm.可以实现10～60 mm的连续变焦,倍率变化范嗣为-0.03～-0.3.变焦轨迹平滑,整个变焦过程无渐晕,图像质量清晰稳定.结论 借助高斯光学理论和像差理论能够设计出符合电子助视器使用要求的大变倍比有限远共轭距连续变焦光学系统.

abstractsObjective To describe the principle and technique for designing a 10X continuous zoom optical system with a fixed finite conjugate distance as an E-vision aid device. Methods After the initial structure was designed by using Gaussian optics, optical design software was used to perform aberration correction and optical property evaluation which included modulation transfer function (MTF), spot diagram and diffuse spot diameter. The performance stability of the system was predicted by using a tolerance sensitivity analysis and the Monte Carlo method. Results The mechanically compensated zoom lens designed for an E -vision aid device combines four group components: a fixed front group, a moving variator, a fixed middle group and a compensator that includes a total of 10 lenses, an optical tube length of 84 mm and a front intercept distance of 316 mm. The zoom lens could achieve 10-60 mm continuous zoom and a magnification range from -0.03 to -0.3 without any image vignetting or obvious fluctuation in image quality. Conclusion A continuous zoom optical system with a fixed finite conjugate distance and large zoom ratio can be designed for an E-vision aid device with the help of Gaussian optics and aberration theory.