Photographing lens

Abstract

The invention discloses a photographing lens which comprises, from an object side to an image side, a first lens with positive refractive power, wherein the object side surface of the first lens is a convex surface; a second lens with refractive power; a third lens with negative refractive power, wherein the image side surface of the third lens is a concave surface near the axis and is provided with at least one point of inflexion; a fourth lens with positive refractive power, wherein the object side surface of the fourth lens is a concave surface near the axis and is provided with at least one point of inflexion, and the image side surface of the fourth lens is a convex surface; a fifth lens with negative refractive power, wherein the image side surface of the fifth lens is a concave surface near the axis and the object side surface of the fifth lens is provided with at least one point of inflexion; and a sixth lens with negative refractive power, wherein image side surface of the sixth lens is a concave surface near the axis. The photographing lens meets the following equation: f / f6<-1.0 and f / f4> 1.5, f is the effective focal length of the photographing lens, f4 is the effective focal length of the fourth lens, and f6 is the effective focal length of the sixth lens. According to the photographing lens, high pixel can be guaranteed and the field angle can be enhanced, and miniaturization of the photographing lens can be guaranteed.

Description

technical field [0001] The invention relates to the field of imaging, and more specifically, to a high-pixel and thin imaging lens. Background technique [0002] The photosensitive element of a general optical system is nothing more than a photosensitive coupling device (CCD) or a complementary metal oxide semiconductor element (CMOS). Camera lenses on electronic products such as cameras are also gradually developing in the fields of high pixel, miniaturization, and large field of view. [0003] In order to meet the requirements of high pixel and large field of view, a general camera lens needs to be equipped with a large aperture to meet the requirements of illumination. It is difficult to meet the requirements of a high-pixel photosensitive chip, which is mainly manifested in insufficient resolution, large distortion and large exit angle of the chief ray. Contents of the invention [0004] The embodiments of the present invention aim to solve at least one of the techni...

AI Technical Summary

Problems solved by technology

[0003] In order to meet the requirements of high pixel and large field of view, a general camera lens needs to be equipped with a large aperture to meet the requirements of illumination. It is difficult to meet the requirements of a high-pixel photosensitive chip, mainly due to insufficient resolution, large distortion and large main ray exit angle

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