Low-distortion wide-angle lens

Abstract

A low-distortion wide-angle lens comprises a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), a diaphragm (S), a fifth lens (L5), a sixth lens (L6), a seventh lens (L7), an eighth lens (L8), a ninth lens (L9) and a tenth lens (L10), which are sequentially arranged from an object side to an image side along an optical axis, wherein the third lens (L3), the fifth lens (L5) and the seventh lens (L7) have negative focal power, and the sixth lens (L6) and the tenth lens (L10) have positive focal power. Through reasonable placement and matching of the positive and negative focal power lenses and the concave and convex lenses, optical distortion of imaging is reduced, the lens is enabled not to be virtually focused in a temperature range of -30 DEG C to 70 DEG C, and imaging pixels are further improved. Due to the reasonable arrangement of the lenses, the requirement of tolerance sensitivity between the lenses can be reduced, meanwhile, the overall size of the lens can be reduced, the weight can be reduced, and the cost can be saved.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to a low-distortion wide-angle lens. Background technique [0002] Wide-angle and low-distortion images are required in video conferencing, but in ordinary lenses, the distortion will become more serious as the viewing angle increases, resulting in highly distorted images. A lens is disclosed in the prior art, which has the characteristics of low distortion and can effectively reduce the degree of image distortion, but it has high cost, large volume, no temperature compensation function, and does not take into account both wide-angle and low distortion. Contents of the invention [0003] In order to make up for the above-mentioned defects, the object of the present invention is to provide a low-distortion wide-angle lens, which not only takes into account the wide-angle and low distortion, but also has the advantages of small size, low cost, low tolerance sensitivity and n...

AI Technical Summary

Problems solved by technology

[0002] Wide-angle and low-distortion images are required in video conferencing, but in ordinary lenses, the distortion will be more serious as the viewing angle increases, resulting in highly distorted images

A lens is disclosed in the prior art, which has the characteristics of low distortion and can effectively reduce the degree of image distortion, but it has high cost, large volume, no temperature compensation function, and does not take into account both wide-angle and low distortion.

Images