Wide-angle lens and camera

Abstract

The invention relates to a wide-angle lens and a camera; the lens comprises a former group with the negative optical power, a latter group with the positive optical power and an optical filter, wherein the former group comprises a first concave lens and a second concave lens; the latter group comprises a first convex lens, a second convex lens and a third convex lens which are arranged in sequence from an object space to an image space; and the optical filter is arranged at the back of the third convex. The invention also provides the camera based on the wide-angle lens; the wide-angle lens adopts the fewer lenses and achieves the greater viewing field angle according to the arrangement of all the lenses and reduces the manufacturing cost thereof. The wide-angle lens has simple structure, reduces the production difficulty thereof and low manufacture cost; the optical overall length of the wide-angle lens is less than 28mm; the height of the module of the wide-angle lens can be designed to be shorter so that the wide-angle lens can be used as vehicle-mounted wide-angle lens, monitoring lens and the like to be used and better meets the smallness and skillfulness of the camera; and the full viewing field of the wide-angle lens reaches 200 degrees, which can meet the wider view finding range.

Description

technical field [0001] The invention relates to an optical lens, in particular to a wide-angle lens and a video camera. Background technique [0002] Modern imaging devices have been widely used in various fields. When the imaging device is used in some specific fields, a wide-angle lens is required to increase the field of view. Wide-angle lenses are an important component of some large-field-of-view projects, such as surveillance devices, car rearview mirrors that have become increasingly popular in recent years, and so on. The imaging performance of the lens and the size of the field of view determine the quality of the wide-angle lens, so the performance of the lens and the field of view become important considerations in the design of the wide-angle lens. In order to ensure high imaging quality and brightness and achieve a sufficient field of view, digital imaging systems require a large space to refract light. Often, the number of lenses is increased, high-quality mat...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the prior art wide-angle lens needs more lenses when it wants to achieve a larger field of view, which brings about the problem of higher cost

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