Camera Optical Lens

Abstract

The invention relates to the field of optical lenses, and discloses a photographic optical lens. The photographic optical lens comprises eight lenses in total, and the eight lenses are in order from the object side to the image side: a first lens with positive refractive power, Second lens with refractive power, third lens with negative refractive power, fourth lens with positive refractive power, fifth lens with positive refractive power, sixth lens with negative refractive power, seventh lens with positive refractive power A lens and an eighth lens with negative refractive power; wherein, the focal length of the imaging optical lens is f, the total optical length of the imaging optical lens is TTL, the focal length of the second lens is f2, and the central radius of curvature of the object side of the seventh lens is R13, The central curvature radius of the image side of the seventh lens is R14, and satisfies the following relationship: 0.95≤f / TTL; -4.50≤f2 / f≤-1.90; 0.30≤(R13+R14) / (R13-R14)≤1.00. The imaging optical lens provided by the invention has good optical performance and at the same time meets the design requirements of long focal length and ultrathinness (in a long focal length system).

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 photosensitive coupling 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 ma...

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 eight-element lens structure gradually appears in the lens design. Common Although the eight-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 ultra-thin requirements while having good optical performance. , Long focal length design requirements

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