Optical imaging lens

Abstract

The invention relates to the technical field of lenses. The invention discloses an optical imaging lens, which comprises lenses from the first to the tenth which are sequentially arranged from an object side to an image side along an optical axis, wherein the first lens is a convex-convex lens having a positive refractive index; the second lens is a convex-convex lens having a positive refractiveindex; the third lens is a concave-concave lens having a negative refractive index; the fourth lens has a positive refractive index and a convex object side surface; the fifth lens is a concave-concave lens having a negative refractive index; the sixth lens is a convex-convex lens having a positive refractive index; the seventh lens is a concave-concave lens having a negative refractive index; theeighth lens is a convex-concave lens having a negative refractive index; the ninth lens is a convex-convex lens having a positive refractive index; the tenth lens is a concave-convex lens having a negative refractive index; and the second lens and the third lens are glued to each other, the fourth lens and the fifth lens are glued to each other, the sixth lens and the seventh lens are glued to each other, and the eighth lens and the ninth lens are glued to each other. The optical imaging lens has the advantages of good infrared confocality, good imaging quality, small defocusing or defocusing-free property at high and low temperatures.

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 science and 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, and vehicle monitoring. Therefore, the requirements for optical imaging lenses are also It is getting higher and higher, but the long-focus optical imaging lens currently on the market, such as the optical imaging lens with a focal length of 75mm, has poor infrared confocal performance. When the visible focus is switched to infrared, the infrared mode is seriously out of focus; , the out-of-focus is serious; and the MTF is low, and the imaging resolution is low, which cannot meet the increasing requirements. Contents of the invention [0003] The object of the present in...

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Problems solved by technology

[0002] With the continuous advancement of science and 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, and vehicle monitoring. Therefore, the requirements for optical imaging lenses are also It is getting higher and higher, but the long-focus optical imaging lens currently on the market, such as the optical imaging lens with a focal length of 75mm, has poor infrared confocal performance. When the visible focus is switched to infrared, the infrared mode is seriously out of focus; , the out-of-focus is serious; and the MTF is low, and the imaging resolution is low, which cannot meet the increasing requirements

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