Wide-angle lens

Abstract

The invention discloses a wide-angle lens, which sequentially comprises a first lens with negative focal power from an object side to an imaging surface along an optical axis, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; a diaphragm; the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; the object side surface and the image side surface of the fourth lens are convex surfaces; the fifth lens has negative focal power, the object side surface of the fifth lens is a convex surface near the optical axis, and the image side surface of the fifth lens is a concave surface near the optical axis; the sixth lens has positive focal power, the object side surface of the sixth lens near the optical axis is a convex surface, and the image side surface of the sixth lens is a convex surface; and the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface. The wide-angle lens has the advantages of large imaging target surface, high imaging quality, small distortion, light weight and small size.

Description

technical field [0001] The invention relates to the technical field of imaging lenses, in particular to a wide-angle lens. Background technique [0002] With the development of the mobile Internet and the popularity of social networking, video, and live broadcasting software, people are more and more fond of photography, and their pursuit of imaging effects is more diverse. They require both high-definition image quality and relatively high Wide angle of view to record more information, which makes wide-angle high-definition imaging lens more attention. [0003] Because the wide-angle lens generally has large distortion, the edge imaging effect will be poor, and because the effective focal length of the wide-angle lens is short, the surrounding light will have a large compression deformation. Of course, the wide-angle lens has its own unique perspective and sense of envelopment, but it appears seriously distorted for the flat changing background. It is a difficult problem ...

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Problems solved by technology

But at the same time, the disadvantage is that the product volume and weight are too large

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