Optical image pick-up lens

Abstract

The invention relates to the field of an optical lens, and discloses an optical image pick-up lens. The optical image pick-up lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side, wherein the first lens has positive refractive power; the second lens has negative refractive power; the third lens has negative refractive power; the fourth lens has negative refractive power; the fifth lens has positive refractive power; a focal length of the fifth lens is f5; an overall focal length of the optical image pick-up lens is f; an on-axis distance from an image side surface of the third lens to an object side surface of the fourth lens is d6; an on-axis thickness of the fourth lens is d7; a curvature radius of an object side surface of the third lens is R5; a curvature radius of the image side surface of the third lens is R6; and the following relational expressions are met: a ratio of f5 to f is greater than or equal to 1.50 and smaller than or equal to 4.50, a ratio of d6 to d7 is greater than or equal to 4.50 and smaller than or equal to 5.30, and a ratio of (R5+R6) to (R5-R6) is greater than or equal to0.00 and smaller than or equal to 1.00. The optical image pick-up lens provided by the invention meets design demands for a large aperture, a wide angle and thinning when having excellent optical performance.

Description

[0001] 【Technical field】 [0002] 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. [0003] 【Background technique】 [0004] 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 -OxideSemiconductor 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, they have good Miniaturized camera lenses with image quality have becom...

AI Technical Summary

Problems solved by technology

However, with the development of technology and the increase of diversified needs of users, as the pixel area of ​​the photosensitive device continues to shrink, and the system’s requirements for imaging quality continue to increase, the five-element lens structure gradually appears in the lens design. Common Although the five-element lens already has good optical performance, its focal power, lens spacing and lens shape settings still have certain irrationality, resulting in a lens structure that cannot meet the needs of large aperture, large aperture, and lens shape while having good optical performance. Ultra-thin, wide-angle design requirements

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