Telecentric optical lens

A telecentric optical lens, comprising a first lens to a fifth lens which are successively and coaxially arranged along a transmission direction of an incident light ray;

• wherein the first lens is a plano-concave negative lens which comprises a first curved surface and a second curved surface;
• the second lens is a meniscus negative lens which comprises a third curved surface and a fourth curved surface;
• the third lens is a meniscus negative lens which comprises a fifth curved surface and a sixth curved surface;
• the fourth lens is a biconvex positive lens which comprises a seventh curved surface and a eighth curved surface;
• and
• the fifth lens is a plano-concave negative lens comprises a ninth curved surface and a tenth curved surface;
• two curved surfaces of each lens are a light incident surface and a light emergent surface, respectively, the first curved surface to the tenth curved surface are successively arranged along the transmission direction of the incident light ray, the first curved surface, the third curved surface, the fourth curved surface, the fifth curved surface, and the sixth curved surface, and the ninth curved surface are all convex along the transmission direction of the incident light, the seventh curved surface is convex opposite to the transmission direction of the incident light, the second curved surface and the tenth surface are planar surfaces, a radius of curvature of the first curved surface is −50±5% millimeters, radiuses of curvature of the third curved surface to the ninth curved surface are −121±5%, −80.1±5%, −606±5%, −100±5%, 250±5%, −200±5%, and −150±5%, respectively, and the unit is millimeter.