Camera Optical Lens

Abstract

The invention discloses an imaging optical lens, which comprises in sequence from the object side to the image side: a first lens with negative refractive power, a second lens with negative refractive power, a third lens with positive refractive power, and a negative lens with negative refractive power. The fourth lens with refractive power; wherein, the focal length of the imaging optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, and the focal length of the fourth lens is f4, so The central radius of curvature of the object side of the second lens is R3, the central radius of curvature of the image side of the second lens is R4, the axial thickness of the third lens is d5, and the image side of the third lens is to The on-axis distance of the object side of the fourth lens is d6, and satisfies the following relationship: -2.70≤f1 / f≤-1.20; -3.00≤f2 / f≤-1.50; -3.50≤f4 / f≤-2.00 ; 3.00≤R3 / R4≤10.00; 3.00≤d5 / d6≤6.00. The imaging optical lens provided by the invention has good optical performance and also satisfies the design requirement of wide-angle.

Description

technical field [0001] The invention relates to the field of optical lenses, in particular to an imaging optical lens suitable for portable terminal devices such as smart phones and digital cameras, and imaging devices such as monitors and PC lenses. Background technique [0002] In recent years, with the rise of smart phones, the demand for miniaturized photographic lenses has been increasing, and the photosensitive devices of general photographic lenses are nothing more than photocoupled devices (Charge Coupled Device, CCD) or complementary metal oxide semiconductor devices (Complementary Metal -Oxide Semiconductor Sensor, CMOS Sensor), and due to the improvement of semiconductor manufacturing process technology, the pixel size of photosensitive devices has been reduced, and today's electronic products are developing with good functions and thin, light and small appearance. Therefore, it has Miniaturized camera lenses with good imaging quality have become the mainstream in...

AI Technical Summary

Problems solved by technology

However, with the development of technology and the increase of diversified needs of users, the pixel area of ​​the photosensitive device is constantly shrinking, and the system’s requirements for imaging quality are constantly improving. Although the common four-piece lens already has better optical performance, but its focal power, lens spacing and lens shape settings are still unreasonable, resulting in a lens structure that cannot meet the wide-angle design requirements while having good optical performance

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