Four-piece type imaging lens group

Abstract

A four-piece type imaging lens group from an object side to an image side successively includes a first lens which is close to an optical axis and has the positive refractive power, a second lens, a third lens, and a fourth lens; at least one of the second lens, the third lens and the fourth lens is close to the optical axis and has the positive refractive power, and at least one surface of an object side surface and an image side surface of at least one lens of the lenses is an aspheric surface; the focal distances of the first lens to the fourth lens are f1, f2, f3 and f4 respectively; the focal distance of the four-piece type imaging lens group is f, half of a visual angle of the four-piece type imaging lens group is HFOV, the image side surface of the first lens has at least one inflection point Inf, and the four-piece type imaging lens group meets 0.70<=|f / f1|<=1.0 and HFOV>=35 deg.

Description

technical field [0001] The invention relates to an optical imaging system, in particular to a four-chip imaging lens group. Background technique [0002] Existing imaging lens groups are suitable for imaging lens groups in electronic products such as mobile phones, smart phones, tablet computers, notebook computers, and cameras. With the continuous development of such electronic products, they gradually tend to be light, thin and small in design, but at the same time require high performance. Therefore, the imaging lens group is developed towards a thinner and more compact overall size. In order to improve the resolution and meet the high image quality For a high-quality imaging range, such as fullHD (High Definition) with a resolution specification of 1920×1080, the imaging lens group also needs to develop in a wider-angle direction. [0003] As for the existing imaging lens groups, although it is revealed that there are four-piece imaging lens groups, none of them can fur...

AI Technical Summary

Problems solved by technology

[0003] However, the existing imaging lens groups, although it is revealed that there are four-piece imaging lens groups, none of them can further meet the requirements of thinness and wide angle.

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