4P超薄800万像素镜头设计

发布时间：2018-12-08 08:30

【摘要】：针对手机镜头很难同时实现高成像质量和短总长的实际问题,通过对初始结构进行优化设计,得到一款全部采用光学塑料为透镜材料的超薄手机镜头。镜头采用四片式结构,光阑位于镜头前方,镜片全部采用偶次非球面。该镜头总长4.49 mm,F数为2.4,视场角为65.5°,焦距为3.71 mm,在探测器Nyquist频率处MTF均大于0.14,在半Nyquist频率处MTF均大于0.46,且畸变小于1.5%。光学系统各视场的均方根半径小于3.5μm。采用索尼公司的IMX111型号CMOS探测器,最大分辨率为3264×2448。通过模拟计算,得到该手机镜头的离焦量为144μm。通过调焦,可以在物距大于10cm时,得到像质较好的图像。通过灵敏度分析,镜头公差满足加工要求。该镜头设计长度较短,采用非球面塑料透镜,生产成本较低,成像性能良好,满足手机镜头的使用要求。
[Abstract]:Aiming at the practical problem that it is difficult for mobile phone lens to achieve high imaging quality and short total length at the same time, an ultra-thin mobile phone lens with optical plastic as lens material is obtained by optimizing the initial structure. The lens is four-slice structure, the diaphragm is in front of the lens, and the lens is even aspherical. The total length of the lens is 2.49 mm,F, the angle of view is 65.5 掳, the focal length is 3.71 mm, the MTF is more than 0.14 at the Nyquist frequency of the detector, the MTF is more than 0.46 at the semi-Nyquist frequency, and the distortion is less than 1.5. The root mean square radius of each field of view of the optical system is less than 3.5 渭 m. Sony's IMX111 CMOS detector is used with a maximum resolution of 3264 脳 2448. The defocus of the lens is 144 渭 m. By focusing, better image quality can be obtained when the object distance is larger than 10cm. Through sensitivity analysis, the lens tolerance meets the processing requirements. The design length of the lens is short, the aspherical plastic lens is used, the production cost is low, the imaging performance is good, and it can meet the requirements of the mobile phone lens.
【作者单位】：长春理工大学电子信息工程学院;
【基金】：国家自然科学基金(60977011)
【分类号】：TN929.53

【参考文献】