Small-head large-aperture pick-up lens

Abstract

The invention relates to a small-head large-aperture pick-up lens. The lens is technically characterized by sequentially comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a diaphragm from an object side to an image side along an optical axis, wherein the first lens has positive refraction power, and the object-side surface of the first lens is a convex surface; the second lens, the third lens and the fourth lens all have refractive power; the fifth lens has positive refractive power, the paraxial position of the image-side surface of the fifthlens is a plane, and at least one convex surface exists at an off-axis position of the fifth lens; the sixth lens has negative refractive power, and the image-side surface of the sixth lens is concavesurface; the object-side surface and the image-side surface of each lens are aspheric surfaces; and the diaphragm is disposed on the object side of the first lens. According to the lens, the head size of the lens is small, the screen-to-body ratio of a mobile phone is improved, the performance of the lens is not reduced, resolution is high, and the lens has a large aperture and can meet the requirement of a user for shooting clearer images.

Description

technical field

[0001] The invention relates to an optical system, in particular to a camera lens with a small head and a large aperture, which is suitable for photographing devices such as mobile phones that require a high screen-to-body ratio and high resolution. Background technique

[0002] At present, mobile phones are gradually developing in the direction of high performance and high appearance. With the emergence of folding screens, people gradually begin to demand a larger screen-to-body ratio. In order to meet the larger screen-to-body ratio, the camera lens usually sacrifices a certain lens aperture to meet the requirements of a small head. In the design of the optical system, the common practice is to achieve a smaller head by changing the thickness of the first lens. Although the aperture can be kept relatively large, the performance of the lens will still decline to a certain extent, which will affect the shooting quality of the lens. Contents of the invention...

Images