Wide-angle imaging lens

Abstract

The invention discloses a wide-angle imaging lens. The wide-angle imaging lens comprises a first lens having negative refraction power, a second lens having refraction power, a third lens having positive refraction power, a fourth lens having positive refraction power, a fifth lens having negative refraction power, and a sixth lens having refraction power which are sequentially distributed from the object side to the image side; the image side surface of the first lens is a concave surface and is made of plastics; the object side surface of the second lens is a convex surface; the image side surface of the second lens is a concave surface; the image side surface of the third lens is a convex surface; the image side surface of the fourth lens is a convex surface; and the object side surface of the sixth lens is a convex surface. The wide-angle imaging lens satisfies the condition that 1.1<f1 / f4<0, wherein f1 is the effective focal length of the first lens, and f4 is the effective focal length of the fourth lens. The wide-angle imaging lens of the invention is small in size, can maintain high image quality and has a super wide field of view.

Description

technical field [0001] The invention relates to optical imaging technology, in particular to a wide-angle imaging lens. Background technique [0002] Currently, photosensitive elements of optical imaging systems include charge-coupled device (charge-coupled device, CCD) or complementary metal-oxide semiconductor (complementary metal-oxide semiconductor, CMOS) image sensors. With the development of semiconductor process technology, the pixel size of the photosensitive element is getting smaller and smaller, correspondingly, the imaging lens also needs to have a smaller size and higher imaging quality. At the same time, as the application fields of imaging lenses become wider and wider, the demand for shooting range is also wider and wider. Therefore, in order to meet the requirements of a wide field of view, the number of lenses is generally increased, but this is not conducive to the miniaturization and weight reduction of the lens; as the angle increases, the off-axis aber...

AI Technical Summary

Problems solved by technology

Therefore, in order to meet the requirements of a wide field of view, the number of lenses is generally increased, but this is not conducive to the miniaturization and weight reduction of the lens; as the angle increases, the off-axis aberration also increases sharply, which is not conducive to improving imaging Quality; at the same time, the incident height of light is more conducive to the correction of off-axis aberrations, and the incident height is reflected in the lens size, so miniaturization is not conducive to expanding the field of view

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