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 an optical axis from the object surface to the image surface; the surface of the first lens facing the object surface is a convex surface at the optical axis, and the surface facing the image surface is a concave surface, having a positive focal power; the diffractive optical element has a positive focal power and includes a surface facing the object surface, a surface facing the image surface, and a diffractive surface between the two surfaces, the surface facing the object surface is a convex surface at the optical axis, and the surface facing the image surface is a concave surface at the optical axis; the lens module includes N lenses, at least one of the surface facing the object surface and the surface facing the image surface of each of the N lenses is an aspheric surface, and the lens module has a positive focal power. The camera lens provided by the application can meet the requirements of miniaturization and high image quality, and meet the demand for size increase 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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