| 摘要 |
The invention relates to a wide-angle lens and an image photographing device, and aims to provide a novel wide-angle lens in consideration of mirror surface reflection. The wide-angle lens is used for performing image photographing through an image photographing sensor and has a visual angle which is larger than 180 DEG, wherein a front lens set, a transparent optical element and a back lens set are successively arranged from an object side to an image side. Furthermore the wide-angle lens is provided with an aperture (S). The front lens set is composed of a lens (L1) and a lens (L2) and has a negative diopter and two recessed lens surfaces which face the image side. The incident surface and the emitting-out surface of a transparent optical element (L2) are planar surfaces. The back lens set is composed of a lens (L4), ..., and a lens (L8) and has a positive diopter. In the front lens set, the two recessed lens surfaces are respectively provided with wide-wavelength low-reflection coatings (11,12) with light splitting reflectivity of less than 1% in a wavelength range of 400nm to 800nm. |
