A super wide-angle imaging lens

Abstract

The invention relates to an ultra-wide-angle imaging lens. The ultra-wide-angle imaging lens successively comprises a lens piece I, a lens piece II, a lens piece III, a diaphragm, a lens piece IV, a lens piece V, a lens piece VI, a glass light filtering piece and an imaging side from an object side to an imaging side, wherein the lens piece II and the lens piece IV are aspheric plastic-cement lens pieces, and the lens piece I is a lens with negative folding force; the lens piece II is a convex-concave lens, the convex surface faces to the object side, and the concave surface faces to the imaging side; the lens piece III is a flat convex lens, the plane of the flat convex lens is close to the object side, and the convex surface faces to the imaging side; the lens piece IV is a concave-convex lens, the concave surface faces to the object side, and the convex surface faces to the imaging side; the lens piece V is a double-convex lens; the lens piece VI is a concave-convex lens, the concave surface faces to the object side, and the convex surface faces to the imaging side. Parts of lenses of an optical system are made of plastic cement, so that the weight of the ultra-wide-angle imaging lens can be effectively lighted, the imaging capability under the low-light environment is enhanced, and besides, a six-piece structure is adopted, so that the optical total length is shortened.

Description

technical field [0001] The invention relates to the field of optical devices, in particular to an ultra-wide-angle imaging lens for automobiles. Background technique [0002] The optical lens is an essential part of the machine vision system, which directly affects the quality of the image and affects the realization and effect of the algorithm. Optical lenses can be divided into short-focus lenses, medium-focus lenses, and telephoto lenses in terms of focal length; wide-angle, standard, and telephoto lenses in terms of field of view; fixed-aperture fixed-focus lenses and manual aperture fixed-focus lenses in terms of structure. Auto iris fixed focus lens, manual zoom lens, auto zoom lens, auto iris electric zoom lens, electric triple variable lens, etc. [0003] At present, with the continuous rapid development of our country's economy, the number of private cars has increased sharply. Now buying a car and taking a driver's license test have become a common phenomenon. Nov...

AI Technical Summary

Problems solved by technology

Traditional car cameras have poor imaging effects, small field of view, and small aperture

Images