Imaging lenses that eliminate stray light

Abstract

The invention relates to an imaging lens applicable to a lens module for shooting images and video recordings, in particular to an imaging lens capable of eliminating stray light. The imaging lens capable of eliminating stray light of the present invention comprises a lens barrel, an imaging unit arranged in the lens barrel, and an installation position arranged in the imaging unit or between the imaging unit and the lens barrel shading film. The light-shielding sheet has a planar ring-shaped fixed portion positioned at the installation position, and a bent portion bent from an inner peripheral edge of the fixed portion and extending obliquely toward the optical axis to terminate at a terminal edge. The fixing part of the shading sheet makes it easy to locate the shading sheet at the installation position in the lens barrel, and is easy to assemble to maintain good assembly accuracy, and the bending part can effectively eliminate stray light to reduce stray light Unnecessary images are generated during imaging, so that the imaging lens can have higher imaging quality.

Description

technical field [0001] The invention relates to an 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 I, and are respectively arranged between the lens 121 and the lens 122, the lens 123 Two shading components 125, 126 between the lens 124. The two shading components 125 and 126 are mainly used to eliminate stray light so as not to affect the image quality. 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 , will still be imaged on an imaging surface 127 after being reflected and refracted between the lens barrel 11 and the lenses 121-124, so that the stray r...

AI Technical Summary

Problems solved by technology

For example, with figure 2 For example, if the inclination slope of the non-optical surface 143 of the first lens 141 on the image side is too narrow, the range in which the support portion can be set on the non-optical surface 146 of the second lens 144 on the object side will be too small, It is difficult to design two or more supporting parts, because a single supporting part is not enough to support the obliquely arranged light shielding assembly 131, making it difficult for the light shielding assembly 131 to be firmly positioned against the first lens 141 and the second lens 141. between lens 144

In addition, because the thickness of the shading component 131 is extremely thin, when it is sandwiched on a non-plane (such as figure 2 The non-optical part surface 146) and a plane (such as figure 2 When between the non-optical part surface 143 of the first lens 141), the shading assembly 131 is easily deformed and difficult to be smoothly attached to the non-optical part surface 143 of the first lens 141, thereby affecting the assembly accuracy of the imaging lens and affecting the shading Therefore, the imaging lens is not only difficult to maintain better assembly accuracy, but also has the problem that the imaging quality is easily affected by poor assembly.

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