Optical imaging lens

Abstract

The invention provides an optical imaging lens, which is characterized in that a first lens has positive focal power, the object side surface of the first lens is a convex surface, a second lens has negative focal power, the image side surface of the second lens is a concave surface, a third lens has focal power, the object side surface of the third lens is a convex surface, a fourth lens has positive focal power, the image side surface of the fourth lens is a convex surface, a fifth lens has negative focal power, the object side surface of the fifth lens is a convex surface, the image side surface of the fifth lens is a concave surface, in the first lens, the second lens, the third lens and the third lens, a diffractive optical element is arranged on one surface of at least one lens, and the diffraction efficiency of the diffractive optical element on light with the wave band ranging from 470 nm to 650 nm is larger than 80%, and the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the optical imaging lens and the effective focal length f of the optical imaging lens meet the condition that TTL/f is smaller than 0.95. According to the invention, the problem that in the prior art, an optical imaging lens is poor in imaging quality is solved.

Description

technical field [0001] The present invention relates to the technical field of optical imaging equipment, in particular to an optical imaging lens. Background technique [0002] In recent years, with the rapid development of electronic terminal equipment such as smart phones, consumers have higher and higher demands for miniaturization, ultra-thinness and high imaging quality of camera equipment. As an important aberration affecting imaging quality, chromatic aberration is usually caused by optical materials having different refractive indices for different colors of light. Excessive chromatic aberration can easily affect the imaging quality of optical imaging lenses, resulting in poor imaging quality of optical imaging lenses. [0003] That is to say, the optical imaging lens in the prior art has the problem of poor imaging quality. Contents of the invention [0004] The main purpose of the present invention is to provide an optical imaging lens to solve the problem of p...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide an optical imaging lens t

Images