Image pickup optical lens

Abstract

The invention relates to the field of optical lenses, and discloses an image pickup optical lens, which sequentially comprises a first lens with positive refractive power, a second lens with positiverefractive power, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens from an object side to an image side; the total optical length of the image pickup opticallens is TTL, the focal length of the image pickup optical lens is f, the focal length of the second lens is f2, the center curvature radius of the object side face of the sixth lens is R11, the centercurvature radius of the image side face of the sixth lens is R12, and the following relational expressions are met: 0.95<=f / TTL; 3.50<=f2 / f<=5.00; -20.00<=(R11+R12) / (R11-R12)<=-3.00. The image pickupoptical lens provided by the invention has good optical performance and also meets the design requirements of large aperture, long focal length and ultra-thinness.

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, as the pixel area of ​​the photosensitive device continues to shrink, and the system’s requirements for imaging quality continue to increase, the eight-piece 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 requirements of large aperture, large aperture, and lens shape while having good optical performance. Long focal length, ultra-thin design requirements

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