Q-type非球面技术在超短焦全景镜头设计中的应用

Application of Q-type Asphere in the Design of Super Short-focus Panoramic Lens

介绍了Q-type新型非球面多项式算法及其相比于传统非球面多项式在加工、制造方面的优势.引入超短焦全景镜头焦距与分辨率的关系,利用Q-type非球面技术,设计了一款焦距0.657mm,焦距像高比≤0.184的全景镜头.该镜头由7组8片透镜组成,包含4面非球面透镜.设计结果表明:在空间频率为227lp/mm处,调制传递函数值大于0.3,接近衍射极限;在垂直半视场角45°～90°的环景边缘区域,图像角分辨率达到了1.163 7mm/(°),使得环景展开后有较高分辨率,表明Q-type非球面技术在超短焦全景镜头设计中有一定优越性.

The Q-type novel aspherical polynomials and its advantages are introduced in the aspect of algorithm,fabrication and manufacturing relative to the traditional aspherical polynomial-based aspheres.The Q-type formulation is applied to design a panoramic lens based on the relationship of super short-focus panoramic lens′ focus and resolution.The designed panoramic lens′ focus is 0.657 mm and ratio of focus and image height is less than 0.184,which includes 4 aspheric surface.This result shows that the spatial pixel of scenic circle area with half vertical field 45°～90° is up to 1.163 7 mm/(°),and the modulation transformation function is greater than 0.3 at the spatial frequency of 227 lp/mm.The result demonstrates the Q-type formulations is certain advantages in super short-focus panoramic lens.