Super-large-field-of-view fish-eye lens having aspheric-structure-based lens

The invention discloses a super-large-field-of-view fish-eye lens having an aspheric-structure-based lens. The super-large-field-of-view fish-eye lens is formed by combination of eleven lens pieces and one optical filter and includes a front group optical system having a negative focal power and a rear group optical system having a positive focal power, wherein the systems are arranged from an object space to an image space along a direction of an optical axis. The front group optical system consists of the first lens piece, the second lens piece, and the third lens piece, wherein the first, second and third lens pieces are in negative crescent shapes and convex surfaces of the lens pieces face forward; and the rear group optical system includes other lens pieces and the optical filters; and the optical filter is arranged between the fifth lens pieces and an image plane. In the front group optical system, the front optical surface of the first lens piece employs an aspheric structure and the front optical surfaces of the second lens piece and the third lens piece employ spherical structures; or the front optical surfaces of the first lens piece and the second lens piece employs aspheric structures and the front optical surfaces of the third lens piece employs a spherical structure. According to the invention, the image plane of the optical system has high uniformity. The super-large-field-of-view fish-eye lens has advantages of good imaging quality, compact structure, and easy processing.