WO2021000199A1 - 镜头模组 - Google Patents

镜头模组 Download PDF

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Publication number
WO2021000199A1
WO2021000199A1 PCT/CN2019/094099 CN2019094099W WO2021000199A1 WO 2021000199 A1 WO2021000199 A1 WO 2021000199A1 CN 2019094099 W CN2019094099 W CN 2019094099W WO 2021000199 A1 WO2021000199 A1 WO 2021000199A1
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WO
WIPO (PCT)
Prior art keywords
wall
extinction
lens module
optical axis
walls
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PCT/CN2019/094099
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English (en)
French (fr)
Inventor
韦传冬
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瑞声光学解决方案私人有限公司
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Application filed by 瑞声光学解决方案私人有限公司 filed Critical 瑞声光学解决方案私人有限公司
Priority to PCT/CN2019/094099 priority Critical patent/WO2021000199A1/zh
Priority to CN201921030967.9U priority patent/CN210090790U/zh
Publication of WO2021000199A1 publication Critical patent/WO2021000199A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses

Definitions

  • This application relates to the field of optical imaging technology, and in particular to a lens module.
  • Lens is a very important optical component in imaging and imaging devices, and its performance will directly determine the quality of imaging performance. Therefore, lens performance will become an important consideration in the design of imaging equipment such as cameras, video cameras, or projectors.
  • the mainstream structure of the lens module is roughly as follows: It includes a lens barrel, a lens set in the lens barrel, a shading sheet or a shading plate clamped between two adjacent lenses, and a lens set on the bottom layer and the lens. Pressure ring between the cylinders.
  • the purpose of the present application is to provide a lens module to solve the technical problem that the existing lens module is susceptible to stray light interference and causes poor imaging quality.
  • a lens module which includes a lens barrel, a lens group accommodated in the lens barrel, and a pressing ring provided on the image side of the lens group
  • the pressing ring includes an object side surface, an image side surface disposed opposite to the object side surface, and a wall portion connecting the object side surface and the image side surface.
  • the wall portion includes an inner side wall close to the optical axis and an image side surface. The outer side wall opposite to the inner side wall;
  • the inner side wall is inclined in a cross section parallel to the optical axis, and in a direction from the object side to the image side, the inner side wall is inclined in a direction close to the optical axis;
  • a plurality of the extinction walls are arranged in a circular array around the optical axis, and the angle formed by the intersection of the first wall and the second wall of each extinction wall ranges from 0° to 90° °.
  • the number of the extinction walls is 90 to 1080.
  • the height of each extinction wall extending from the main body ranges from 10 ⁇ m to 30 ⁇ m.
  • the extinction wall is triangular.
  • the radial distance between the end of the first wall close to the body and the end of the second wall close to the body of each extinction wall ranges from 20 ⁇ m to 40 ⁇ m, and the two adjacent ones
  • the radial distance between the centers of the matting walls ranges from 20 ⁇ m to 100 ⁇ m.
  • a plurality of the matting walls are continuously arranged on the body.
  • the beneficial effect of the present application lies in that: in the lens module, the inner side wall of the pressure ring is arranged as a slope in a cross-section parallel to the optical axis, and in the direction from the object side to the image side, the inner side wall is directed toward the side close to the optical axis.
  • the direction is inclined, that is, the light interception point is set at the image side end of the pressure ring to reduce the generation of stray light in the lens barrel; in addition, a light extinction part is provided on the inner side wall of the pressure ring, because the first wall of the light extinction part It is cross-connected with the end of the second wall away from the main body (or the end close to the optical axis), so the stray light hitting the inner side wall of the pressure ring can be reflected at different angles and positions, thereby changing the light reflection Path to achieve the effect of scattering, thereby effectively weakening the stray light in the lens barrel, and ultimately improving the imaging quality of the lens module.
  • FIG. 1 is a cross-sectional view of a lens module in an embodiment of the application
  • Figure 2 is a front view of the pressure ring in Figure 1;
  • Figure 3 is a top view of the pressure ring in Figure 2;
  • Figure 4 is a bottom view of the pressure ring in Figure 2;
  • Figure 5 is a sectional view of the pressure ring in Figure 2;
  • Figure 6 is a partial enlarged view of the extinction wall in the pressure ring in Figure 1;
  • Fig. 7 is a schematic structural diagram of the first type of extinction part of the pressure ring in Fig. 6;
  • FIG. 8 is a schematic structural diagram of a second type of extinction part of the pressure ring in FIG. 6;
  • Fig. 9 is a schematic structural diagram of a third type of extinction part of the pressure ring in Fig. 6;
  • FIG. 10 is a schematic diagram of the structure of the fourth type of extinction part of the pressure ring in FIG. 6;
  • FIG. 11 is a schematic diagram of the structure of the fifth type of extinction part of the pressure ring in FIG. 6;
  • Fig. 12 is a partial three-dimensional structure diagram of the pressure ring in Fig. 1.
  • Lens module OO’, optical axis
  • Extinction part 131. Body; 132. Extinction wall; 1321, first wall; 1322, second wall; 1323, arc shape;
  • the present application also provides a lens module 1.
  • the lens module 1 includes a lens barrel 30, a lens group 20 accommodated in the lens barrel 30, and a pressing ring 10 provided on the image side of the lens group 20 Among them, the pressing ring 10 is mainly used to fix the lens group 20 in the lens barrel 30.
  • the number of lenses in the lens group 20 can be 5, or can be 1, 2, 3, 4 or more, and the specific number can be selected and set according to different needs.
  • the lens group 20 includes 5 lenses, and the pressure ring 10 is arranged on the lens closest to the image side.
  • the pressing ring 10 includes an object side 112, an image side 111, and a wall portion 113.
  • the image side surface 111 and the object side surface 112 are disposed oppositely in the direction of the optical axis OO', and the wall portion 113 is connected The object side 112 and the image side 111.
  • the wall portion 113 includes an inner side wall 1131 close to the optical axis OO' and an outer side wall 1132 disposed opposite to the inner side wall 1131.
  • the inner side wall 1131 of the pressure ring 10 is inclined in a cross-section parallel to the optical axis OO', so that when the light outside the lens barrel 30 passes through the pressure ring 10, the difference between these lights and the pressure ring 10 can be increased.
  • the inner side wall 1131 of the pressure ring 10 is inclined toward the optical axis OO'.
  • the light hole 12 enclosed by the inner side wall 1131 of the pressure ring 10 is in the shape of an inverted trapezoid in the cross section in the direction of the optical axis OO'. More specifically, as shown in FIG. As an example, the inner side wall 1131 of the pressure ring 10 presents an inclined surface inclined from upper right to lower left, wherein the angle a1 between the inclined surface and the image side surface 111 of the pressure ring 10 ranges from 30° to 60°.
  • the inner wall surface 1132 of the pressure ring 10 since the inner wall surface 1132 of the pressure ring 10 directly faces the optical region, the inner wall surface 1132 of the pressure ring 10 is easily exposed to a large amount of incident light and reflects it to other structural surfaces in the lens barrel 30.
  • the above-mentioned reverse angle structure is adopted.
  • the light interception point is set at the image side end of the pressure ring in this application. The stray light passing through the pressure ring 10 is reduced, and at the same time, the inner wall surface 1132 of the pressure ring 10 is subjected to a matting treatment, thereby effectively weakening the influence of stray light.
  • the light intercepting point structure is actually a circle, in which light rays cannot pass outside the circle, but light rays can pass only inside the circle. In this way, if there is stray light, as long as it is outside this circle, it cannot pass. Therefore, the stray light that can affect imaging through the pressing ring 10 will be further reduced, thereby further improving the imaging quality.
  • the pressing ring 10 also includes a matting part 13 opened on the inner side wall 1131.
  • the matting part 13 includes a body 131 and a plurality of matting walls protruding and extending from the body 131 132.
  • each matting wall 132 includes a first wall 1321 and a second wall 1322 respectively extending from the main body 131 in a direction close to the optical axis OO'.
  • An end of the first wall 1321 away from the main body 131 Cross-connected with the end of the second wall 1322 away from the main body 131, each matting wall 132 extends from the object side 112 to the image side 111.
  • the light entering the pressure ring 10 can be scattered, thereby greatly reducing the reflection phenomenon of stray light, effectively weakening the interference of the lens module 1 by stray light, and improving the imaging quality.
  • a plurality of extinction walls 132 are arranged in a circular array around the optical axis OO'.
  • the included angle a2 formed by the intersection of the first wall 1321 and the second wall 1322 of each matte wall 132 that is, the included angle B in FIGS.
  • the light entering the pressure ring 10 can be reflected from multiple different angles and positions to form a scattering effect (mainly by changing the light reflection area and changing the light reflection direction), thereby reducing
  • the number of the matting walls 132 is 90 to 1080.
  • the number of extinction walls 132 can also be determined according to specific actual needs, and is not limited to this.
  • each extinction wall 132 has a straight strip shape, and preferably, each extinction wall 132 has a triangular shape in a cross section perpendicular to the optical axis OO'.
  • the cross-section of each extinction wall 132 may also have other shapes, and/or each extinction wall 132 may also be wavy, as long as a concave-convex structure can be formed to scatter light.
  • each extinction portion 13 there are several optimized cross-sectional shape structures for each extinction portion 13.
  • the height A of each extinction wall 132 extending from the main body 131 ranges from 10 ⁇ m to 30 ⁇ m.
  • the radial distance C between the end of the first wall 1321 close to the main body 131 and the end of the second wall 1322 close to the main body 131 of each matting wall 132 ranges from 20 ⁇ m to 40 ⁇ m.
  • the range of the radial distance D between the centers of two adjacent matting walls 132 is 20 ⁇ m-100 ⁇ m.
  • a plurality of matting walls 132 are continuously arranged on the main body 131.
  • the end of the first wall 1321 of each extinction wall 132 away from the main body 131 and the end of the second wall 1322 away from the main body 131 are connected by an arc 1323, which can further increase the interference between the stray light and the inner wall 1131 of the pressure ring 10 The contact area, thereby improving the scattering ability of the extinction part 13.
  • the light enters the lens barrel 30 from the object side direction of the lens barrel 30, and needs to pass through the pressure ring 10 and the lens group 20 first, because the inner wall 1131 of the pressure ring 10 is reversed.
  • the inverted trapezoidal structure of the direction angle can effectively reduce the stray light entering the pressure ring 10.
  • the stray light entering the pressure ring 10 can be combined from different angles. The light is reflected in the position to achieve a scattering effect, thereby weakening the influence of stray light on the imaging quality, and ultimately greatly improving the imaging quality of the lens module 1.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)

Abstract

一种镜头模组(1)，包括镜筒(30)和压环(10)，压环(10)包括物侧面(112)、与物侧面(112)相对设置的像侧面(111)以及连接物侧面(112)和像侧面(111)的壁部(113)，壁部(113)包括靠近光轴(OO')的内侧壁(1131)和与内侧壁(1131)相对设置的外侧壁(1132)；镜头模组(1)通过将内侧壁(1131)在平行于光轴(OO')的截面设置为斜面，且从物侧至像侧的方向上，内侧壁(1131)向靠近光轴(OO')的方向倾斜，以此减少进入到压环(10)内的光线，进而减少镜筒(30)内杂散光的生成；另外，还通过在内侧壁(1131)上开设消光部(13)，因消光部(13)的第一壁(1321)和第二壁(1322)的远离本体（131）的一端交叉相连，故此，可以从不同角度和不同位置对射到压环(10)的内侧壁(1131)的杂散光进行反射，从而减少光的反射面积及改变光的反射路径以达到散射效果，有效地弱化镜筒(30)内的杂散光，提升镜头模组(1)的成像品质。

Description

镜头模组 技术领域
本申请涉及光学成像技术领域，尤其涉及一种镜头模组。
背景技术
镜头是摄像成像器件中相当重要的光学组件，其性能将直接决定成像性能的优劣，因而，镜头性能将成为设计照相机、摄影机或放映机等成像设备的重要考虑因素。目前，镜头模组的主流结构大致如下：包括镜筒、设置于所述镜筒内的镜片、夹持于相邻两个镜片之间的遮光片或遮光板及设于底层镜片与所述镜筒之间的压环。
发明概述
技术问题
在成像过程中，在镜筒的物侧，镜筒外部的光从各个角度射至镜筒内时，极易在镜筒内部生成杂散光，镜头模组容易受到这些杂散光的干扰，致使成像品质受到很大的影响。
因此，有必要提供一种杂光干扰小，能保证成像品质的镜头模组。技术解决方案
本申请的目的在于提供一种镜头模组，用于解决现有的镜头模组容易受到杂光干扰导致成像品质不佳的技术问题。
为实现上述目的，本申请的技术方案如下：提供一种镜头模组，该镜头模组包括镜筒、收容于所述镜筒内的镜片组以及设于所述镜片组的像侧的压环，所述压环包括物侧面、与所述物侧面相对设置的像侧面以及连接所述物侧面和所述像侧面的壁部，所述壁部包括靠近所述光轴的内侧壁和与所述内侧壁相对设置的外侧壁；
所述内侧壁在平行于所述光轴的截面上为斜面，且从物侧至像侧的方向上，所述内侧壁向靠近所述光轴的方向倾斜；
所述压环还包括开设于所述内侧壁上的消光部，所述消光部包括本体和由所述 本体凸出延伸的多个消光壁，各所述消光壁包括由所述本体向靠近所述光轴的方向分别延伸的第一壁和第二壁，所述第一壁的远离所述本体的一端与所述第二壁的远离所述本体的一端交叉相连，各所述消光壁自所述物侧面延伸至所述像侧面。
作为一种改进，多个所述消光壁围绕所述光轴呈环形阵列排布，各所述消光壁的所述第一壁和所述第二壁交叉形成的夹角范围为0°～90°。
作为一种改进，所述消光壁的数量为90个～1080个。
作为一种改进，在所述镜筒的径向上，各所述消光壁自所述本体延伸出的高度范围为10μm～30μm。
作为一种改进，在垂直于所述光轴的截面上，所述消光壁呈三角形。
作为一种改进，各所述消光壁的所述第一壁靠近所述本体的一端与所述第二壁靠近所述本体的一端之间的径向距离范围为20μm～40μm，相邻的两所述消光壁中心处之间的径向距离范围为20μm～100μm。
作为一种改进，多个所述消光壁在所述本体上连续排列。
作为一种改进，各所述消光壁的所述第一壁的远离所述本体的一端与所述第二壁的远离所述本体的一端通过弧形连接。
问题的解决方案
发明的有益效果
有益效果
本申请的有益效果在于：该镜头模组，通过将压环的内侧壁在平行于光轴的截面设置为斜面，且从物侧至像侧的方向上，内侧壁向靠近所述光轴的方向倾斜，也就是将截光点设置在压环的像侧端，减少镜筒内的杂散光的生成；另外，还通过在压环的内侧壁上开设消光部，因消光部的第一壁和第二壁的远离本体的一端(或者说靠近光轴的一端)交叉相连，故此，可以在不同的角度和位置上对射到压环的内侧壁的杂散光进行反射，从而改变光的反射路径以达到散射的效果，进而有效地弱化镜筒内的杂散光，最终提升镜头模组的成像品质。
对附图的简要说明
附图说明
图1为本申请一个实施例中镜头模组的剖面图；
图2为图1中压环的主视图；
图3为图2中压环的俯视图；
图4为图2中压环的仰视图；
图5为图2中压环的剖视图；
图6为图1中压环中消光壁的局部放大图；
图7为图6中压环的第一种消光部的结构示意图；
图8为图6中压环的第二种消光部的结构示意图；
图9为图6中压环的第三种消光部的结构示意图；
图10为图6中压环的第四种消光部的结构示意图；
图11为图6中压环的第五种消光部的结构示意图；
图12为图1中压环的部分立体结构示意图。
其中，附图中各标号如下：
1、镜头模组；OO’、光轴；
10、压环；111、像侧面；112、物侧面；113、壁部；1131、内侧壁；1132、外侧壁；
13、消光部；131、本体；132、消光壁；1321、第一壁；1322、第二壁；1323、弧形；
20、镜片组；30、镜筒。
发明实施例
本发明的实施方式
下面结合附图和实施方式对本申请作进一步说明。
本申请还提供一种镜头模组1，如图1所示，该镜头模组1包括镜筒30、收容于镜筒30内的镜片组20以及设于镜片组20的像侧的压环10，其中，压环10主要用于将镜片组20固定于镜筒30内。
需说明的是，镜片组20中的镜片数量可以是5个，也可以是1个、2个、3个、4个或更多个，具体数量可以根据不同需求进行选择设置。如图1所示，在本实施 例中，镜片组20包括5个镜片，其中，压环10设置在最靠近像侧的镜片上。
如图2至图4所示，该压环10包括物侧面112、像侧面111和壁部113，其中，像侧面111与物侧面112在光轴OO’的方向上相对设置，壁部113连接物侧面112和像侧面111。具体地，如图4所示，壁部113包括靠近光轴OO’的内侧壁1131和与内侧壁1131相对设置的外侧壁1132。
如图5所示，压环10的内侧壁1131在平行于光轴OO’的截面上为斜面，这样，当镜筒30外部的光线经过压环10时，可以增加这些光线与压环10的内侧壁1131的接触面积。另外，再如图5所示，从物侧至像侧的方向上，压环10的内侧壁1131向靠近光轴OO’的方向倾斜。可以理解地，压环10的内侧壁1131靠近像侧面111一侧的半径小于压环10的内侧壁1131靠近物侧面112一侧的半径，也就是将截光点设置在压环的像侧端。
具体在本实施例中，压环10的内侧壁1131围成的光孔12在光轴OO’方向的截面上呈倒梯形，更具体地，如图5所示，以压环10的右侧为例，压环10的内侧壁1131呈现为一个右上向左下倾斜的斜面，其中该斜面与压环10的像侧面111的夹角a1的范围为30°～60°。
可以理解地，因压环10的内壁面1132直接面对光学区域，因而压环10的内壁面1132容易接触到大量的入射光，并将其反射至镜筒30内的其它结构表面上，故，本申请采用上述的反向角度结构，相比现有的光孔12在光轴OO’方向的截面上呈梯形的结构，本申请中将截光点设置在压环的像侧端，可以减少从压环10通过的杂散光，同时在压环10的内壁面1132进行消光处理，从而有效地弱化杂光影响。
需说明的是，该截光点结构实际上为一个圆，其中，在该圆以外光线无法通过，在该圆以内光线才可以通过。这样，如果有杂散光，只要在这个圆以外就无法通过，故此，能通过压环10影响成像的杂散光将进一步减少，从而进一步提升成像品质。
如图5至图8所示，为进一步弱化杂光影响，压环10还包括开设于内侧壁1131上的消光部13，消光部13包括本体131和由本体131凸出延伸的多个消光壁132。其中，如图6至图11所示，各消光壁132包括由本体131向靠近光轴OO’的方向分别 延伸的第一壁1321和第二壁1322，第一壁1321的远离本体131的一端与第二壁1322的远离本体131的一端交叉相连，各消光壁132自物侧面112延伸至像侧面111。这样，即可对进入压环10的光线进行散射，从而大大地减少杂光的反射现象，有效地弱化镜头模组1受到杂光的干扰，提高成像品质。
在一个实施例中，如图3和图4所示，多个消光壁132围绕光轴OO’呈环形阵列排布。另外，如图6所示，各消光壁132的第一壁1321和第二壁1322交叉形成的夹角a2(也即图6至图11中的夹角B)的范围为0°～90°，这样，通过阵列消光结构，即可从多个不同的角度和位置对进入压环10的光线进行反射形成散射效果(主要通过改变光的反射面积和改变光的反射方向等实现)，从而减少压环10的内侧壁1131(也可理解为上述斜面)上的杂光，进而减少进入到镜筒30内镜片组20等其它零部件的光线，极大程度地减少杂散光的生成，并弱化杂光对成像品质的影响。
在一个实施例中，消光壁132的数量为90个～1080个。当然，实际上，消光壁132的数量也可根据具体实际需要而定，并不限于此。
在一个实施例中，如图5和图12所示，为简化压环10的结构，以及进一步各消光壁132沿光轴OO’的方向延伸设置。具体在本实施例中，各消光壁132为直条状，优选地，在垂直于光轴OO’的截面上，各消光壁132呈三角形。在实际应用中，各消光壁132的横截面还可以为其它形状，和/或各消光壁132还可以为波浪状，只要能形成凹凸结构以能对光形成散射即可。
在一个实施例中，如图7至图11所示，为各消光部13的几种优化横截面形状结构。为进一步提高消光部13的散射能力，在镜筒30的径向上，各消光壁132自本体131延伸出的高度A的范围为10μm～30μm。各消光壁132的第一壁1321靠近本体131的一端与第二壁1322靠近本体131的一端之间的径向距离C的范围为20μm～40μm。相邻的两消光壁132中心处之间的径向距离D的范围为20μm～100μm。
在本实施例中，如图7至图11所示，多个消光壁132在本体131上连续排列。另外，各消光壁132的第一壁1321的远离本体131的一端与第二壁1322的远离本体131的一端通过弧形1323连接，这样，可以进一步增加杂散光的与压环10内侧壁1131的接触面积，从而提高消光部13的散射能力。
采用上述镜头模组1后，可以理解地，光线从镜筒30的物侧方向射入镜筒30的内部，需先经过压环10以及镜片组20，因压环10的内侧壁1131采用反向角度的倒梯形结构，故此，可以有效地减少进入压环10内的杂散光，另外，通过在压环10上设置消光部13，可以对进入压环10内的杂散光从不同的角度和位置上对光线进行反射以达到散射的效果，进而弱化杂光对成像品质的影响，最终大大地提升镜头模组1的成像品质。
以上所述的仅是本申请的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本申请创造构思的前提下，还可以做出改进，但这些均属于本申请的保护范围。

Claims (8)

  1. 一种镜头模组，所述镜头模组包括镜筒、收容于所述镜筒内的镜片组以及设于所述镜片组的像侧的压环，所述压环包括物侧面、与所述物侧面相对设置的像侧面以及连接所述物侧面和所述像侧面的壁部，所述壁部包括靠近光轴的内侧壁和与所述内侧壁相对设置的外侧壁；其特征在于：
    所述内侧壁在平行于所述光轴的截面上为斜面，且从物侧至像侧的方向上，所述内侧壁向靠近所述光轴的方向倾斜；
    所述压环还包括开设于所述内侧壁上的消光部，所述消光部包括本体和由所述本体凸出延伸的多个消光壁，各所述消光壁包括由所述本体向靠近所述光轴的方向分别延伸的第一壁和第二壁，所述第一壁的远离所述本体的一端与所述第二壁的远离所述本体的一端交叉相连，各所述消光壁自所述物侧面延伸至所述像侧面。
  2. 根据权利要求1所述的镜头模组，其特征在于：多个所述消光壁围绕所述光轴呈环形阵列排布，各所述消光壁的所述第一壁和所述第二壁交叉形成的夹角范围为0°～90°。
  3. 根据权利要求2所述的镜头模组，其特征在于：所述消光壁的数量为90个～1080个。
  4. 根据权利要求3所述的镜头模组，其特征在于：在所述镜筒的径向上，各所述消光壁自所述本体延伸出的高度范围为10μm～30μm。
  5. 根据权利要求2所述的镜头模组，其特征在于：在垂直于所述光轴的截面上，所述消光壁呈三角形。
  6. 根据权利要求4所述的镜头模组，其特征在于：各所述消光壁的所述第一壁靠近所述本体的一端与所述第二壁靠近所述本体的一端之间的径向距离范围为20μm～40μm，相邻的两所述消光壁中心处之间的径向距离范围为20μm～100μm。
  7. 根据权利要求6所述的镜头模组，其特征在于：多个所述消光壁在所述本体上连续排列。
  8. 根据权利要求7所述的镜头模组，其特征在于：各所述消光壁的所述第一壁的远离所述本体的一端与所述第二壁的远离所述本体的一端通过弧形连接。
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