Photographic lens

Abstract

The invention provides a photographic lens. The photographic lens sequentially comprises, from an object side to an image side along an optical axis, a first lens with negative focal power, wherein the object side surface of the first lens is a concave surface; a second lens with focal power, wherein the image side surface of the second lens is a concave surface; a third lens with focal power; a fourth lens with negative focal power, wherein the object side surface of the fourth lens is a concave surface; a fifth lens with focal power, wherein the object side surface of the fifth lens is a convex surface; and a sixth lens with focal power. At least one of the first to sixth lenses is a glass lens; and the axial distance SAG31 between the intersection point of the object side face of the third lens and the optical axis and the effective radius vertex of the object side face of the third lens and the axial distance SAG32 between the intersection point of the image side face of the third lens and the optical axis and the effective radius vertex of the image side face of the third lens meet the condition that (SAG31-SAG32) / (SAG31 + SAG32) is larger than -2.0 and smaller than -1.0. The problem that high image quality and high and low temperature adaptability of a photographic lens in the prior art are difficult to consider at the same time is solved.

Description

technical field [0001] The present invention relates to the technical field of optical imaging equipment, in particular to a photographic lens. Background technique [0002] At present, the development of the field of optical imaging is becoming more and more mature. Taking the camera lens of a mobile phone as an example, the traditional mobile phone lens is generally composed of multiple plastic lenses to ensure the lightweight and low cost of the mobile phone lens. However, due to the material problem of the plastic lens itself, In a high temperature or low temperature environment, deformation is easy to occur, and due to the limitation of materials, the image quality is sacrificed, making it difficult for the final imaging effect to meet the needs of users. At the same time, users have also put forward higher requirements for the size of photographic lenses. Ultra-thin, large shooting range and large aperture are more and more favored by users. At the same time, it is ens...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a photographic lens to solve the problem that the photographic lens in the prior art has high image quality and the ability to adapt to high and low temperatures, and it is difficult to take into account at the same time

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