Optical system, camera module and electronic equipment

Abstract

The invention relates to an optical system, a camera module and electronic equipment. The optical system sequentially comprises a first lens element with positive refractive power from an object side to an image side along an optical axis, a second lens element with negative refractive power, a third lens element, a fourth lens element, a fifth lens element with negative refractive power, a sixth lens element with positive refractive power and a seventh lens element with negative refractive power, wherein the second lens element with negative refractive power has a convex object-side surface and a concave image-side surface in a paraxial region, respectively. the third lens is further included; the fourth lens is further included; the fifth lens element with negative refractive power is further included; the sixth lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof, and at least one of the object-side surface and the image-side surface is provided with an inflection structure; for the seventh lens element with negative refractive power, the image-side surface is concave in a paraxial region thereof, and at least one of the object-side surface and the image-side surface is provided with an inflection structure; the optical system satisfies the following conditional expression, ImgH / FNO is greater than 3.00 mm; ImgH is half of the image height corresponding to the maximum field angle of the optical system, and FNO is the number of apertures of the optical system. The optical system of the above design has a large image plane and high imaging quality.

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] In recent years, because the optical lens has the function of acquiring image information, the optical lens has become the main module for image capture of electronic products. At the same time, with the rapid improvement of people's living standards and the rapid development of science and technology, people have higher and higher requirements for the imaging quality of optical lenses. Therefore, how to improve the optical characteristics of optical lenses to improve imaging effects has become an urgent problem. question. [0003] In related technologies, usually by increasing the number of lenses of the optical lens, or configuring parameters such as lens refractive power and surface shape of the lens, the optical lens can obtain higher imaging quality. However, due to t...

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Problems solved by technology

[0005] Based on this, it is necessary to provide an optical system, a camera module and an electronic device for how to better realize the problem of how to improve the imaging effect while taking into account the optical characteristics of the large image surface.

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