Optical lens assembly

Abstract

The invention relates to an optical lens assembly. The optical lens assembly comprises a first lens, a second lens, a third lens and a diaphragm sequentially arranged from the object side to the imaging side. The ratio R2/R1of the curvature radius R1 of a first surface sequence of the first lens to the curvature radius R2 of a second surface sequence of the first lens is 4-5, the ratio P3TC/P1TC of the central thickness P1TC of the first lens to the central thickness P3TC of the third lens is 0.5-2, the ratio P2TC/P1-P2AC of the central thickness P2TC of the second lens to the air gap thickness P1-P2AC between the first lens and the second lens is 0.5-2, and the ratio f2/f1 of the effective focal length f2 of the second lens to the effective focal length f1 of the first lens is 1-2.8. The optical lens assembly can effectively guarantee stability of the lens forming process and the lens, and sensitiveness is reduced. The total length of the lens is small, and the height of a module is small. Aberration is reduced, and the imaging performance of the 3P lens is improved.

Description

technical field [0001] The invention relates to the technical field of mobile phone optical lenses, in particular to an optical lens assembly. Background technique [0002] Most of the mobile phone cameras in the existing market are built-in, and the trend of mobile phones being thin and short makes the lens of mobile phones become shorter and shorter. This requires us to control the total length and volume of the optical lens as much as possible when designing the lens. For optical lenses, the overall length should be shortened without reducing the image quality, and efforts should be made to reduce the cost. Therefore, the design of optical lenses is particularly important. In lens design, the design of lens surface, thickness, etc. The choice of materials is two major issues to be considered in optical design. In the prior art, if the volume of the module needs to be reduced, the difference is large, and the imaging effect is limited, which cannot meet the requirements; ...

AI Technical Summary

Problems solved by technology

In the prior art, if the volume of the module needs to be reduced, the difference is large, and the imaging effect is limited, which cannot meet the requirements; and the stability of the lens is also limited accordingly.

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