包含直角棱镜的第一镜片组作为系统的前固定组。采用系统的运动组及像面与第一镜片组不共轴的结构形式设计一个满足56°视场（FOV）角、2.5倍光学变焦及600万像素要求的手机摄像镜头。利用全动型变焦距透镜高斯光学法计算镜头结构，用Code-V优化镜头系统，畸变为-5%～5%，弥散斑大小均匀，调制传输函数（MTF）值在空间频率20 lp/mm处大于0.8，184 lp/mm处大于0.1。公差分析验证了镜头的合理性。

The first lens including the right-angle prism is considered to be the first fix group of the system. The non-coaxal structure with the movement group and the group concluding the image plane and the first lens are used to design a camera lens with 56° field of view （FOV）, 2.5× optical zoom, and 600 megapixel. The lens structure is calculated by the Gaussian optical theory of the full auto zoom lens and then optimized by Code-V. The system distortion scope is between -5% and 5%, spot basic sizes are homogeneous, and the modulation transfer function （MTF） values are more than 0.8 and 0.1 when the frequency space is 20 lp/mm and 184 lp/mm, respectively. Tolerance analysis proves the rationality of the lens.