Camera lens, camera module and terminal

Abstract

The application provides a camera lens, a camera module and a terminal. The camera lens includes a first lens, a diffractive optical element and a lens module along the optical axis from the object plane to the image plane. The surface of the first lens facing the object plane is on the optical axis. It is a convex surface, and the surface facing the image side is concave at the optical axis, with positive power; the diffractive optical element has positive power and has negative dispersion properties, which includes the surface facing the object side, the surface facing the image The surface on the surface side and the diffractive surface between these two surfaces, the surface facing the object surface side is a convex surface at the optical axis, and the surface facing the image surface side is a concave surface at the optical axis; the lens module includes N lenses , at least one of the surface facing the object plane side and the surface facing the image plane side of each of the N lenses is an aspheric surface, and the lens module has a positive refractive power. The camera lens provided by the application can meet the requirements of miniaturization and high imaging quality, as well as the requirement of increasing the size of the image sensor.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to a camera lens, a camera module and a terminal. Background technique [0002] In recent years, with the development of smart terminal technology, the shooting function has become an essential feature of many smart terminals (such as smart phones). Taking a smart phone as an example, the camera lens is the core component of the camera module of the smart phone, and its technology has been developed rapidly. With the development of time and technology, user demands for the miniaturization of smartphones and high image quality (large aperture) for shooting functions are increasing. [0003] Generally speaking, the evaluation parameters of high imaging quality include optical indicators of aberrations such as chromatic aberration, monochromatic aberration (including astigmatism, distortion, spherical aberration, etc.), in order to obtain high imaging quality, a sufficiently l...

AI Technical Summary

Problems solved by technology

With the evolution of smartphone hardware performance, image sensors with larger sizes and higher resolutions (such as 1 / 2.8 inches to 1 / 2.3 inches) have begun to be widely used. As image sensors become larger and larger, the current The mainstream camera lens design scheme will inevitably lead to further increase of TTL parameters

However, due to the limitation of the size of the smartphone, it is difficult to further increase the total thickness and area of ​​the camera lens, and it will be more difficult to meet the requirements of miniaturization and high imaging quality at the same time.

[0007] To sum up, for the design of the camera lens, it is currently a severe technical challenge to meet the requirements of miniaturization and high imaging quality, but also to meet the needs of the image sensor format increase

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