Optical lens, camera module, and terminal device

An optical lens comprising four lenses having refractive power, from an object side to an image side along an optical axis, the four lenses sequentially comprising:

• a first lens, a second lens, a third lens, and a fourth lens;
• the first lens having negative refractive power, an object side surface of the first lens being concave near the optical axis, and an image side surface of the first lens being convex near the optical axis;
• the second lens having positive refractive power, an object side surface of the second lens being convex near the optical axis, and an image side surface of the second lens being concave near the optical axis;
• the third lens having positive refractive power, an object side surface of the third lens being concave near the optical axis, and an image side surface of the third lens being convex near the optical axis;
• and
• the fourth lens having negative refractive power, an object side surface of the fourth lens being convex near the optical axis, and an image side surface of the fourth lens being concave near the optical axis;
• wherein the optical lens satisfies following relationships:
• 65°<FOV<75°, 1.2<ImgH/F<1.4;
• and
• wherein FOV is a maximum field of view of the optical lens, ImgH/F is a diameter of a largest effective imaging circle on an imaging plane of the optical lens, and F is an effective focal length of the optical lens.