Imaging lens capable of eliminating stray light

Abstract

The invention relates to an optical imaging lens capable of being applied to a lens module for image shooting and picture recording. The imaging lens capable of eliminating stray light comprises a lens cone, an imaging unit arranged in the lens cone and a shading assembly arranged in the imaging unit. The shading assembly comprises a fixing portion arranged on the imaging unit in a clamping mode, an object side protruding portion and an image side protruding portion, the object side protruding portion protrudes from the inner periphery, close to an object side, of the fixing portion, extends inwards in a tilted mode and ends at a tail end edge, and the image side protruding portion protrudes from the inner periphery, close to an image side, of the fixing portion, extends inwards in a tilted mode and ends at a tail end edge. The fixing portion of the shading assembly enables the shading assembly to be located and assembled easily, so that good assembly accuracy can be maintained; the object side protruding portion and the image side protruding portion can effectively eliminate the stray light so as to reduce unnecessary influences of the stray light during imaging. The imaging lens has higher imaging quality.

Description

technical field [0001] The invention relates to an optical imaging lens applicable to a lens module for shooting images and video recordings, in particular to an imaging lens capable of eliminating stray light. Background technique [0002] refer to figure 1 , an existing imaging lens has a lens barrel 11, a plurality of lenses 121, 122, 123, 124 installed inside the lens barrel 11 along the optical axis 10, and two are respectively arranged between the lenses 121, 122 and the lens 123, The shading components 125 , 126 between 124 , and a gasket 127 sandwiched between the shading component 126 and the lens 124 . The shading components 125, 126 are used to eliminate stray light so as not to affect the image quality. The washer 127 can reduce the thickness of the assembly part of the lens 124 to facilitate the manufacture of the lens 124 . [0003] However, the existing shading components 125 and 126 still cannot effectively eliminate the stray light incident at a large ang...

AI Technical Summary

Problems solved by technology

[0003] However, the existing shading components 125 and 126 still cannot effectively eliminate the stray light incident at a large angle, such as figure 1 A stray ray 110 shown in , after being reflected and refracted between the lens barrel 11 and the lenses 121, 122, 123, 124, will still be imaged on an imaging surface 128, causing the stray ray 110 to still affect the image quality , therefore, it is necessary to provide an imaging lens that can effectively eliminate stray light to obtain better imaging quality

[0004] In addition, because the thickness of the shading components 125, 126 is extremely thin, if the contact surfaces between the lenses 121, 122, 123, 124 and the shading components 125, 126 are uneven due to manufacturing tolerances, they will A gap is generated, which makes the shading components 125, 126 easily deformed and difficult to be smoothly attached to the plurality of lenses 121, 122, 123, 124, thereby affecting the assembly accuracy of the imaging lens, resulting in unsatisfactory shading effect and imaging quality. Therefore, in addition to the high difficulty in manufacturing parts and the large number of assembled components, it is difficult to maintain a good assembly accuracy in this imaging lens, and there is also the problem that the imaging quality is easily affected by poor assembly.

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