Camera Optical Lens

Abstract

The invention relates to the field of optical lenses, and discloses a photographic optical lens, which sequentially includes from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a positive refractive lens The third lens with positive refractive power, the fourth lens with positive refractive power, the fifth lens with negative refractive power, the sixth lens with positive refractive power and the seventh lens with negative refractive power; the overall focal length of the imaging optical lens is f, the focal length of the second lens is f2, the focal length of the fifth lens is f5, the focal length of the seventh lens is f7, the radius of curvature of the object side of the fourth lens is R7, the first The radius of curvature of the image side of the four lenses is R8, and satisfies the following relational expressions: -4.00≤f2 / f≤-1.50; 3.20≤f5 / f7≤7.50; R7 / R8≤-3.20. The imaging optical lens of the present invention has good optical performances such as large aperture, wide-angle, and ultra-thin.

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 seven-element lens structure gradually appears in the lens design. Common Although the seven-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. Wide-angle, ultra-thin design requirements

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