Optical system, lens module and electronic equipment

Abstract

The invention provides an optical system, a lens module and electronic equipment. The electronic equipment sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from the object side to the image side in the optical axis direction, wherein the first lens has a positive bending force, the object side surface of the first lens near the optical axis and near the circumference is a convex surface, and the image side surface of the first lens near the optical axis is a convex surface; the second lens has a negative bending force, and the image side surfaces of the second lens , near the optical axis and near the circumference are concave surfaces; and a fifth lens has a negative meandering force. The optical system satisfies the following conditional expressions: f14 / f < = 1.5; and TTL / f < = 1, wherein f14 is the combined focal length of the first lens, the second lens, the third lens and the fourth lens, f is the effective focal length of the optical system, and TTL is the distance from the object side surface of the first lens to the imaging surface of the optical system on the optical axis. Through the arrangement, light is in smooth transition, so that the optical system has the long-focus characteristic, meanwhile, the overall length of the optical system is small, and ultra-thinness is achieved.

Description

technical field [0001] The invention belongs to the technical field of optical imaging, and in particular relates to an optical system, a lens module and electronic equipment. Background technique [0002] With the market's requirements for high imaging quality of cameras, telephoto lenses emerged as the times require. The telephoto lens is characterized by a longer focal length, which is conducive to capturing the details of long-distance objects and achieving clear imaging. However, the lens barrel of the telephoto lens is long, which does not conform to the development trend of miniaturization and integration. [0003] In conventional optical systems, too few lenses make it difficult to achieve telephoto characteristics, and too many lenses make it difficult to achieve miniaturization. Therefore, there is a need to develop an optical system with an appropriate lens layout capable of achieving both telephoto characteristics and miniaturization. Contents of the inventio...

AI Technical Summary

Problems solved by technology

However, the lens barrel of the telephoto lens is long, which does not conform to the development trend of miniaturization and integration

[0003] In conventional optical systems, too few lenses make it difficult to achieve telephoto characteristics; too many lenses make it difficult to achieve miniaturization

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