Camera Optical Lens

Abstract

The present invention relates to the field of optical lenses, and discloses a photographic optical lens. The photographic optical lens comprises in sequence from the object side to the image side: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The sixth lens, the seventh lens and the eighth lens; the first lens has positive refractive power; wherein, the optical total length of the imaging optical lens is TTL, the focal length of the imaging optical lens is f, and the second lens The focal length of the eighth lens is f2, the central radius of curvature of the object side of the eighth lens is R15, the central radius of curvature of the image side of the eighth lens is R16, and the following relationship is satisfied: 0.95≤f / TTL; -4.00≤ f2 / f≤‑1.90; 0.25≤(R15+R16) / (R15‑R16)≤0.90. The imaging optical lens provided by the invention not only has good optical performance, but also satisfies the design requirements of long focal length and ultrathinness.

Description

Camera optics technical field The present invention relates to the field of optical lenses, particularly a kind of portable terminals suitable for smart phones, digital cameras, etc. equipment, as well as imaging optical lenses for 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 is increasing day by day. The photosensitive device is nothing more than a photosensitive coupled device (Charge Coupled Device, CCD) or a complementary metal oxide semiconductor There are two kinds of bulk devices (Complementary Metal‑Oxide Semiconductor Sensor, CMOS Sensor), and due to The advancement of semiconductor manufacturing process technology has reduced the pixel size of photosensitive devices, and today's electronic products are more functional. The development trend is good, thin and short appearance. Therefore, the miniaturized camera lens with good imagi...

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 are still unreasonable, resulting in a lens structure that cannot meet the requirements of long focal length, Ultra-thin design requirements

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