Photographing optical lens

Abstract

The invention provides a photographing optical lens. The photographing optical lens includes a first lens with negative refractive power, an aperture, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power and a fifth lens with negative refractive power which are sequentially distributed in a direction from an objectside to an image side. The focal length of the first lens is f1; the focal length of the second lens is f2; the on-axis thickness of the second lens is d3; an on-axis distance from the image side surface of the second lens to the object side surface of the third lens is d4; the on-axis thickness of the third lens is d5; the on-axis thickness of the fourth lens is d7; an on-axis distance from the image side surface of the fourth lens to the object side surface of the fifth lens is d8; and the curvature radius of the object side surface of the third lens is R5. The f1, f2, d3, d4, d5, d7, d8 andR5 satisfy the following relational expressions that -1.00 <=(f1+f2) / f<=0.10; 12.00<=d3 / d4<=20.00; 5.00<=R5 / d5<=11.00; 8.00<=d7 / d8<=14.00. The photographing optical lens has the advantages of excellent optical performance and capability of satisfying wide-angle and ultra-thin design requirements.

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 mainstrea...

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 requirements of the system for imaging quality are constantly improving. Although the common five-element lens already has better optical performance, but its focal power, lens spacing and lens shape settings still have certain irrationality, resulting in a lens structure that cannot meet the design requirements of large aperture, ultra-thin, and wide-angle while having good optical performance.

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