One-billion-pixel large-depth-of-field optical system and imaging method

The invention relates to the field of industrial detection equipment, in particular to a billion-pixel large-depth-of-field optical system and an imaging method.The optical system comprises a front lens group A, a diaphragm B and a rear lens group C which are sequentially arranged in the light incidence direction; the front lens group A comprises a positive meniscus lens A1, a negative meniscus lens A2, a biconcave lens A3, a biconvex lens A4 and a biconvex lens A5 which are sequentially arranged along the incidence direction of light from left to right, and the rear lens group C comprises a positive meniscus lens C1, a negative lens C2, a positive lens C3 and a positive meniscus lens C4 which are sequentially arranged along the incidence direction of the light from left to right. The used target surface of the optical system is large in size, and the chief ray angle of an edge field of view is small. 本发明涉及工业检测设备领域，尤其涉及一亿像素大景深光学系统及成像方法，光学系统包括沿光线入射方向依次设置的前镜组A、光阑B、后镜组C；所述前镜组A包括沿光线自左向右入射方向依次设置的正月牙透镜A1、负月牙透镜A2、双凹