Image pickup lens

Abstract

The invention discloses an image pickup lens. With the image pickup lens adopted, the problem that the field-of-view angle of a three-piece lens in the prior art is relatively small can be solved. According to the technical schemes of the invention, the image pickup lens includes three sets of lenses which are arranged sequentially along an optical axis from an object side to an image side. The first lens is a negative-optical power lens, and the image-side surface of the first lens is a concave surface. The second lens is a positive-optical power lens, and the object-side surface of the second lens is a convex surface. The third lens is a positive-optical power lens, and the image-side surface of the third lens is a convex surface. The lenses satisfy a relationship that -0.9<f1 / f<-0.5, wherein f1 is the focal length of the first lens, and f is the effective focal length of the entire image pickup lens. According to image pickup lens of the present invention, a simplified three-piece lens design is adopted; the optical power, concave surfaces and convex surfaces of the lenses are combined, and therefore, the total optical length of the image pickup lens can be effectively reduced,and a requirement for a wide field-of-view angle can be satisfied, and imaging quality can be improved.

Description

technical field [0001] The invention relates to an optical system composed of lenses, in particular to an imaging lens. Background technique [0002] In recent years, with the advancement of the technology industry, imaging systems have been developing towards multi-functions, such as mobile phone image communication, smart home monitoring systems, and automotive imaging systems. However, traditional imaging lenses are long in length and large in size. , which is not conducive to the miniaturization of application equipment. In order to save space, most imaging lenses adopt a three-piece lens design, but most of the existing three-piece lenses have a field of view angle below 80 degrees, and the first piece is mostly a positive power lens. design. Due to the application requirements of the imaging system, the field of view angle needs to reach more than 80 degrees or even reach 160 degrees. However, the existing three-piece lens design is difficult to meet the requirements ...

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the advancement of the technology industry, imaging systems have been developing towards multi-functions, such as mobile phone image communication, smart home monitoring systems, and automotive imaging systems. However, traditional imaging lenses are long in length and large in size. , which is not conducive to the miniaturization of application equipment. In order to save space, most imaging lenses adopt a three-piece lens design, but most of the existing three-piece lenses have a field of view angle below 80 degrees, and the first piece is mostly a positive power lens. design

Due to the application requirements of the imaging system, the field of view angle needs to reach more than 80 degrees or even reach 160 degrees. However, the existing three-piece lens design is difficult to meet the requirements of wide angle, large aperture and short system length. Therefore, it also has certain limitations. room for improvement

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