Optical system, camera module and electronic equipment

Abstract

The invention discloses an optical system, a camera module and electronic equipment. The optical system includes: a first lens having positive refractive power; a second lens element with negative refractive power; a third lens element with positive refractive power, the image-side surface of the third lens element being convex in a paraxial region; a fourth lens element with refractive power; the fifth lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. A sixth lens element with refractive power; a seventh lens element with positive refractive power; an eighth lens element with negative refractive power, wherein the image-side surface of the eighth lens element near the optical axis is a concave surface; the object side surfaces and the image side surfaces of the first lens, the second lens, the fourth lens and the seventh lens are convex surfaces and concave surfaces at positions near the optical axis respectively; the optical system satisfies the relationship: 1.2 < = TTL / Imgh < = 1.3. According to the optical system provided by the embodiment of the invention, good imaging quality can be taken into account while light, thin and miniaturized design is realized.

Description

technical field [0001] The invention relates to the technical field of photography and imaging, in particular to an optical system, a camera module and electronic equipment. Background technique [0002] With the development of camera technology, the market demand for portable electronic devices such as smartphones, smart watches, and smart glasses has increased significantly, and consumers have higher and higher requirements for the imaging quality and functions of lenses. Not only do they require lenses to be thinner and smaller, At the same time, a higher image quality should be achieved. The lens can obtain image information and is the main module of electronic equipment to realize image capture. With the rapid improvement of people's living standards and the rapid development of science and technology, the pixel size of the image sensor closely matched with the lens is continuously reduced, which requires the lens to achieve higher quality imaging effects. [0003] At...

AI Technical Summary

Problems solved by technology

However, the increase in the number of lenses will increase the difficulty of lens design, processing and assembly, and the camera module with multi-chip design is often a large-scale structure in electronic equipment, which increases the volume of the lens; while the traditional compression method (Such as reducing the number of lenses) Although the size of the camera module can be shortened, it often leads to a decrease in image quality. The device maintains good imaging quality during the miniaturization design process, which is difficult to meet consumers' high-definition imaging needs for lenses

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