Fixing ring, lens module and electronic device

Abstract

A fixing ring is used for a lens module, the fixing ring comprises a first end face and a second end face which are opposite to each other, an inner hole used for light transmission is formed in the fixing ring, and the fixing ring further comprises protrusions arranged on the hole wall of the inner hole. Each protrusioncomprises a first inclined surface, a second inclined surface and a connecting surface connected with the first inclined surface and the second inclined surface, one side, far away from the connecting surface, of the first inclined surface is connected with the first end surface, one side, far away from the connecting surface, of the second inclined surface is connected with the second end surface, and a light absorption layer is arranged on the connecting surface. According to the invention, the light absorption layer is arranged on the connecting surface of the fixing ring, so that the imaging light emitted to the connecting surface is completely absorbed by the light absorption layer, the imaging incident light is prevented from being scattered by the tip parts of the protrusions, and the imaging quality is improved. In addition, the invention also provides a lens module and an electronic device.

Description

technical field [0001] The invention relates to a fixed ring, in particular to a fixed ring for improving stray light, a lens module and an electronic device with the fixed ring. Background technique [0002] The lens module usually uses UV glue to fix the lens and the lens holder, but if the thickness of the glue is too thin or the reflectivity of the glue is too high, it is easy to scatter the light entering the lens module and cause stray light, which will affect the imaging of the lens module Quality, so a fixing ring is usually set in the lens module. In addition to stabilizing the lens module, the fixing ring can also block most stray light. However, due to insufficient machining accuracy or the impermissibility of the material itself, the tip of the fixing ring is not sharp enough, so that part of the light is reflected by the tip of the fixing ring, so the reduction of stray light cannot be effectively achieved. Contents of the invention [0003] In view of this,...

AI Technical Summary

Problems solved by technology

However, due to insufficient machining accuracy or the material itself does not allow, the tip of the fixing ring is not sharp enough, causing part of the light to be reflected by the tip of the fixing ring, so the reduction of stray light cannot be effectively achieved

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