Optical imaging lens

The invention provides an optical imaging lens. The optical imaging lens comprises a lens barrel; a plurality of lenses, which are arranged at intervals along the axial direction of the lens cone; a base layer; the surface of one side of the transition layer is connected with the substrate layer; the microstructure film layer is connected with the surface of the other side of the transition layer, a plurality of microstructures are arranged on the surface of the side, away from the substrate layer, of the microstructure film layer, and the refractive indexes of the microstructures are gradually reduced in the direction away from the lens. According to the invention, the problem of large reflectivity deviation of the surface of the lens in the prior art is solved. 本发明提供了一种光学成像镜头。光学成像镜头包括镜筒；透镜，透镜为多个，且多个透镜沿镜筒的轴向间隔设置；基底层；过渡层，过渡层的一侧表面与基底层连接；微结构膜层，微结构膜层与过渡层的另一侧表面连接，微结构膜层远离基底层的一侧表面具有多个微结构，微结构的折射率向远离透镜的方向逐渐减小。本发明解决了现有技术中透镜的表面存在反射率偏差大的问题。