Optical lens

The utility model relates to an optical lens which is integrally of a square structure, and the axial thickness of the optical lens is gradually increased from one corner to the opposite corner. An incident plane is arranged on one side of the optical lens, and an emergent plane is arranged on the other side of the optical lens. The incident surface is a spherical convex surface, so that the light beam focusing path is shorter, and the focusing energy is more concentrated. And the emergent surface is an aspheric convex surface, so that refraction light paths of light with different wavelengths can be changed, the light with different wavelengths can be focused on one point, and the focusing effect and the energy concentration ratio of a light beam formed by the light with different wavelengths can be improved. Compared with a traditional single-piece optical lens, the focusing position of emergent light can be adjusted up and down and left and right, and the difficulty in adjusting the focusing position is ef