Large-field-of-view achromatic lens

A large field achromatic lens, comprising:

• a first lens element, which is a meniscus lens element, including a first curved surface and a second curved surface both protruding outward to an image side;
• a second lens element, which is a meniscus lens element, including a third curved surface and a fourth curved surface both protruding outward to an image side;
• a third lens element, which is a biconvex lens element, including a fifth curved surface protruding outward to an object side, and a sixth curved surface protruding outward to the image side;
• a fourth lens element, which is a biconvex lens element, including a seventh curved surface protruding outward to the object side, and an eighth curved surface protruding outward to the image side;
• a fifth lens element, which is a biconcave lens element, including a ninth curved surface protruding outward to the image side, and a tenth curved surface protruding outward to the object side;
• wherein the first to the fifth lens elements are arranged sequentially around a same axis along the propagation direction of an incident ray, and the first to the tenth curved surfaces are arranged sequentially along the propagation direction of the incident ray;
• wherein center thicknesses of the first to the fifth lens elements are 3 mm, 3 mm, 3 mm, 3 mm and 2 mm respectively, with an allowable tolerance of 10%, an upper variation of tolerance of +5%, and lower variation of tolerance of −5%;
• and
• wherein radiuses of curvature of the first to the tenth curved surfaces are −8 mm, −15 mm, −29 mm, −10 mm, 19 mm, −32 mm, 13 mm, −70 mm, −31 mm and 15 mm respectively, with an allowable tolerance of 10%, an upper variation of tolerance of +5%, and lower variation of tolerance of −5%.