Optical imaging lens

Abstract

The invention relates to the technical field of lenses, and discloses an optical imaging lens. The optical imaging lens comprises a first optical lens to an eighth optical lens in sequence along an optical axis from an object side to an image side, wherein the first optical lens is a convex concave lens with a positive refractive index; the second optical lens is a convex concave lens with a negative refractive index; the third optical lens is a planoconcave lens with the negative refractive index; the fourth optical lens is a convex convex lens with a positive refractive index; the fifth optical lens is a concave concave lens with a negative refractive index; the sixth optical lens is a convex convex lens with a positive refractive index; the seventh optical lens is a concave convex lenswith a positive refractive index; and the eighth optical lens is a convex concave lens with a negative refractive index, and |R71| is less than 43, |R721| is greater than 20, |R81| is greater than 10,and |R82| is greater than 25. By use of the optical imaging lens, stray light is optimized, a stray light ghost energy ratio is under an E-7 order of magnitude, a whole picture is almost free from ghosts, and the optical imaging lens has the advantages of good imaging quality, large light transmission, high energy use ratio and good low-luminance night vision effect, and more light enters.

Description

technical field [0001] The invention belongs to the technical field of lenses, and in particular relates to an optical imaging lens. Background technique [0002] With the continuous advancement of technology, optical imaging lenses have also developed rapidly in recent years, and are widely used in various fields such as smart phones, tablet computers, video conferencing, security monitoring, etc. Therefore, the requirements for optical imaging lenses are also getting higher and higher. , in addition to requiring miniaturization, more and more attention is paid to the improvement of optical performance and imaging quality. However, most of the existing optical imaging lenses have serious stray light, which affects the imaging effect, and stray light ghosts are likely to cause image misjudgment. In bad situations, the image is noisy and unclear. Contents of the invention [0003] The object of the present invention is to provide an optical imaging lens to solve the above...

AI Technical Summary

Problems solved by technology

However, most of the existing optical imaging lenses have serious stray light, which affects the imaging effect, and stray light ghosts are likely to cause image misjudgment. In bad situations, the image is noisy and unclear

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