Lens module

Abstract

A lens module comprises a lens barrel, a first lens, a first shading chip and a second lens, the first lens, the first shading chip and the second lens are assembled in the lens barrel sequentially from the object side to the image side, the first lens comprises a first optical portion and first non-optical portions surrounding the first optical portion, and each first non-optical portion comprises a first assembly surface and a second assembly surface, wherein the first assembly surface is close to the object side while the second assembly surface is back to the first assembly surface. The second lens comprises a second optical portion and second non-optical portions surrounding the second optical portion, and each second non-optical portion comprises a third assembly surface close to the object side. The first shading chip is separately arranged among the second assembly surfaces and the third assembly surfaces, and orthographic projection of the first non-optical portions on the first shading chip along the optical axis direction completely falls into the first shading chip. Light projected to the first non-optical portions is completely blocked by the first shading chip so as not to be projected to the second non-optical portions, and generates multiple times of reflection on the second non-optical portions, so that reflected light grains in imaged images are reduced.

Description

technical field [0001] The invention relates to a lens module. Background technique [0002] A lens module usually includes multiple lenses to improve image quality. A conventional lens module includes a lens barrel and a first lens, a light-shielding sheet, a second lens and an imaging element sequentially assembled in the lens barrel from the object side to the image side. The outer diameter of the first lens corresponds to the inner diameter of the lens barrel and includes a first optical part and a first non-optical part surrounding the first optical part. The outer diameter of the second lens corresponds to the inner diameter of the lens barrel and includes a second optical part and a second non-optical part surrounding the second optical part. The first non-optical part and the second non-optical part are locked together. The light-shielding sheet is arranged between the first non-optical part and the second non-optical part. However, since the first non-optical par...

AI Technical Summary

Problems solved by technology

The light-shielding sheet is arranged between the first non-optical part and the second non-optical part. However, since the first non-optical part and the second non-optical part are engaged with each other, the light-shielding sheet cannot completely block the entrance from the first non-optical part into the second non-optical part. The light in the non-optical part, which is reflected multiple times and finally projected to the imaging element, resulting in severe reflection streaks in the imaged image

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