Optical lens

An optical lens comprising a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in order from a magnified side to a minified side, a sum of refractive powers of the first lens and the second lens being negative, a sum of refractive powers of the third lens, the fourth lens and the fifth lens being positive, the first lens being a glass lens with a negative refractive power, the second lens being a plastic lens, the third lens, the fourth lens and the fifth lens being composed of one glass lens with an Abbe number of larger than 60 and two plastic lenses, and a displacement between a focal point of the optical lens measured at 85° C. and a focal point of the optical lens measured at −40° C. being less than 10 μm, wherein the second lens has a magnified-side concave surface and a minified-side convex surface, the fifth lens has a magnified-side convex surface and a minified-side convex surface, and the minified-side convex surface of the fifth lens is not provided with any inflection point.