Optical lens

An embodiment of the utility model provides an optical lens comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged from an object space to an image space along an optical axis, the first lens has positive focal power, the second lens has positive focal power or negative focal power, and the eighth lens has negative focal power or positive focal power. The third lens has positive focal power or negative focal power, the fourth lens has negative focal power, the fifth lens has positive focal power, the sixth lens has positive focal power, the seventh lens has negative focal power, and the eighth lens has positive focal power. The optical lens provided by the embodiment of the utility model has the characteristics of large aperture, high resolution and large target surface, and simultaneously meets the use requirements at the temperature of-40 DEG C to 95 DEG C. 本实用新型实施例提供一种光学镜头，包括沿光轴从物方到像方依次排列的第一透镜、第二透镜、第