WO2020140592A1 - 玻璃镜片及镜头模组 - Google Patents

玻璃镜片及镜头模组 Download PDF

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Publication number
WO2020140592A1
WO2020140592A1 PCT/CN2019/113867 CN2019113867W WO2020140592A1 WO 2020140592 A1 WO2020140592 A1 WO 2020140592A1 CN 2019113867 W CN2019113867 W CN 2019113867W WO 2020140592 A1 WO2020140592 A1 WO 2020140592A1
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Prior art keywords
groove
optical axis
extension
glass lens
lens
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PCT/CN2019/113867
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English (en)
French (fr)
Inventor
高玉婵
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瑞声通讯科技(常州)有限公司
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Publication of WO2020140592A1 publication Critical patent/WO2020140592A1/zh

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00Simple or compound lenses
    • G02B3/02Simple or compound lenses with non-spherical faces
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/021Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • G02B13/001Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0018Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for preventing ghost images
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/003Light absorbing elements
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/022Mountings, adjusting means, or light-tight connections, for optical elements for lenses lens and mount having complementary engagement means, e.g. screw/thread

Definitions

  • the present application relates to the field of optical technology, in particular to a glass lens and lens module.
  • the purpose of the present application is to provide a glass lens to solve the technical problem that stray light generated by the glass lens affects the imaging effect.
  • the glass lens includes an optical portion having an optical axis and an extension portion surrounding the optical portion.
  • the optical portion includes an object side surface and an object side surface
  • the extension portion includes a first extension surface and a second extension surface disposed oppositely, the first extension surface extends from the object side surface in a direction away from the optical axis, and the second extension surface Extending from the side of the image away from the optical axis;
  • a first groove is formed on the first extension surface, and a second groove is formed on the second extension surface, the second groove is closer to the optical axis relative to the first groove, so The second groove is filled with black substance;
  • the dimension of the first groove along the extension direction of the optical axis is the first groove depth
  • the dimension of the second groove along the extension direction of the optical axis is the second groove depth
  • the first extension The distance between the surface and the second extension surface is an extension thickness, and the extension thickness is less than or equal to the sum of the first groove depth and the second groove depth.
  • the first groove is filled with a black substance.
  • a first plane perpendicular to the optical axis is set, the projection of the first groove on the first plane and the projection of the second groove on the first plane Spaced from each other.
  • the depth of the second groove is greater than a quarter of the extended thickness and less than two thirds of the extended thickness.
  • the difference between the distance between the first groove and the optical axis and the distance between the second groove and the optical axis is a groove pitch
  • the extending portion is perpendicular to the
  • the dimension in the optical axis direction is the extension width, which is greater than twice the pitch of the grooves.
  • the first groove is an annular groove whose central axis coincides with the optical axis.
  • the second groove is an annular groove whose central axis coincides with the optical axis.
  • a cross section of the first groove parallel to the optical axis is rectangular; a cross section of the second groove parallel to the optical axis is rectangular.
  • a dimension of at least one of the first groove and the second groove in a direction perpendicular to the optical axis is less than or equal to 0.1 mm, and the black substance is black glue or black plastic.
  • the present application also provides a lens module, including a lens barrel, and the above-mentioned glass lens, the glass lens is disposed in the lens barrel.
  • the beneficial effect of the glass lens provided by the present application is that: the black material in the second groove can absorb the stray light caused by the light reflection on each surface of the lens and inside; the first groove can change the optical path of the stray light, so that the stray light can be more It is collected on the second groove and absorbed by the black material in the second groove, thereby reducing the dead angle of absorbing stray light, improving the effective light absorption rate of the black material, and blocking more stray light from the optical part. Further, stray light that affects the imaging effect is not irradiated into the optical section, thereby optimizing the imaging effect of the lens module.
  • the lens module provided by the present application has the beneficial effects of the glass lens due to the use of the above-mentioned glass lens, which will not be repeated here.
  • Figure 1 is the glass lens provided by this application.
  • FIG. 2 is a lens module provided by this application.
  • the present application discloses a glass lens 100 for a lens module 10. Understandably, the lens module 10 has a through hole 210 for light to enter.
  • the glass lens 100 includes an optical part 110 and The extension 120, the optical part 110 has an optical axis OO', and includes an object side 111 facing the through hole 210, and an image side 112 facing away from the through hole 210, the extension 120 surrounds the periphery of the optical part 110, And includes a first extension surface 121 and a second extension surface 122, the first extension surface 121 is connected to the object side surface 111, and the first extension surface 121 extends from the object side surface 111 in a direction away from the optical axis OO', the second extension surface 122 is connected to the image side surface 112, and the second extension surface 122 extends from the image side surface 112 in a direction away from the optical axis OO'.
  • the extension portion 120 further includes a connection surface 123 connecting the first extension surface 121 and the second extension surface 122,
  • the first extending surface 121 and the second extending surface 122 are both perpendicular to the optical axis OO', and the connecting surface 123 is parallel to the optical axis OO';
  • a first groove 124 is formed on the first extending surface 121
  • a second groove 125 is formed on the second extension surface 122, and the second groove 125 is closer to the optical axis OO' relative to the first groove 124, and the second groove 125 is filled with black substance;
  • the dimension of the first groove 124 along the extension direction of the optical axis OO' is set to the first groove depth D1
  • the extension direction of the second groove 125 along the optical axis OO' is set
  • the dimension on the upper side is the depth of the second groove D2, and the distance between the first extending surface 121 and the second extending surface 122 along the optical axis OO′ is the extension thickness T
  • both the first groove 124 and the second groove 125 are filled with black material, which further expands the absorption range of stray light, so that stray light reflected or refracted from more directions can be Being effectively absorbed, the imaging effect of the lens module 10 is further optimized.
  • the black material in the first groove 124 and the second groove 125 can be selected from various materials, such as plastic or glue. From the perspective of color, black is the best light absorbing effect of all colors, so in order to absorb more stray light that will interfere with the imaging effect and further improve the imaging quality, in this embodiment, it is preferable to use It can be understood that the black plastic or the black glue can be filled with other dark colors or other materials in the first groove 124 and the second groove 125.
  • the following parameters of the glass lens 100 are optimized:
  • the projection of the first groove 124 on the first plane and the projection of the second groove 125 on the first plane are spaced apart from each other, that is, the two do not overlap. That is, the projection of the first groove 124 on the first plane and the projection of the second groove 125 on the first plane neither cross nor overlap;
  • the second groove depth D2 is greater than one quarter of the extension thickness T and less than two thirds of the extension thickness T;
  • the dimension of at least one of the first groove 124 and the second groove 125 in the direction perpendicular to the optical axis OO' is less than or equal to 0.1 mm. That is, the size of the first groove 124 in the direction perpendicular to the optical axis OO' is less than or equal to 0.1 mm, or the size of the second groove 125 in the direction perpendicular to the optical axis OO' is less than or equal to 0.1 mm, or The dimensions of the first groove 124 and the second groove 125 in the direction perpendicular to the optical axis OO′ are less than or equal to 0.1 mm. Preferably, in this embodiment, the dimension of the second groove 125 along any diameter direction of the reference circle is 0.1 mm.
  • the first groove 124 and the second groove 125 are both annular grooves, and the central axis of the first groove 124 and the central axis of the second groove 125 coincide with the optical axis OO′.
  • the ring-shaped structure can be more rounded and beautiful. From the structure, the ring-shaped structure can smoothly cover the groove with black material, and can block stray light from entering the optical part 110 to a greater extent.
  • first groove 124 and the second groove 125 may not be a ring structure, or one of the first groove 124 and the second groove 125 is a ring structure,
  • the other is a non-circular structure, which should be determined according to specific needs, and is not limited here.
  • the cross section of the first groove 124 along the direction parallel to the optical axis OO' is rectangular
  • the cross section of the second groove 125 along the direction parallel to the optical axis OO' is also rectangular; it can also be expressed as: Any plane of the axis OO' is a second plane, the cross section of the first groove 124 parallel to the second plane is rectangular; the cross section of the second groove 125 parallel to the second plane is rectangular.
  • Such a groove not only facilitates processing, but also has little effect on the overall structural strength of the glass lens 100.
  • the present application also provides a lens module 10.
  • the lens module 10 includes a lens barrel 200 and the above-mentioned glass lens 100, as well as the first lens 300 and the first lens stacked on the glass lens 100.
  • both the first lens 300 and the second lens 400 may increase or decrease the number according to the actual situation, which is not limited herein.
  • the lens module 10 provided by the present application has all the beneficial effects of the above-mentioned glass lens 100 due to the above-mentioned glass lens 100, which will not be repeated here.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Lenses (AREA)

Abstract

一种玻璃镜片(100),用于镜头模组(10),包括具有光轴的光学部(110),围绕于光学部(110)四周的延伸部(120),光学部(110)包括物侧面(111)以及与物侧面(111)相对的像侧面(112),延伸部(120)包括自物侧面(111)朝远离光轴(OO')的方向延伸的第一延伸面(121),和自像侧面(112)朝远离光轴(OO')的方向延伸的第二延伸面(122);第一延伸面(121)和第二延伸面(122)上分别开设有第一凹槽(124)和填充有黑色物质的第二凹槽(125),第二凹槽(125)相对于第一凹槽(124)更靠近光轴(OO')。玻璃镜片(100)因加入能够改变杂散光的光路的第一凹槽(124),使杂散光更多地被汇集到第二凹槽(125)处被吸收,从而减小吸收杂散光的死角,提高黑色物质的有效吸光率,进一步优化镜头模组的成像效果。镜头模组(10)因采用了玻璃镜片(100)而具备了玻璃镜片(100)的有益效果。

Description

玻璃镜片及镜头模组 技术领域
本申请涉及光学技术领域,尤其涉及一种玻璃镜片及镜头模组。
背景技术
随着光学成像技术的日渐成熟,诸如照相机、摄像机、望远镜等各类成像产品也普及到千家万户,镜头模组的设计一直是此类产品成像质量的关键所在。
技术问题
但是,由于目前的镜头模组用的玻璃镜片整体透明,多个镜片叠层设置后各个承靠面、与镜筒的连接面造成的杂散光往往会照射入光学部内,从而对成像效果带来较大的影响。
因此,有必要提供一种新的玻璃镜片以解决上述技术问题。
技术解决方案
本申请的目的在于提供一种玻璃镜片,以解决目前玻璃镜片产生杂散光影响成像效果的技术问题。
本申请的技术方案如下:
提供了一种玻璃镜片,用于镜头模组,所述玻璃镜片包括具有光轴的光学部,以及围绕于所述光学部四周的延伸部,所述光学部包括物侧面以及与所述物侧面相对的像侧面,所述延伸部包括相对设置的第一延伸面和第二延伸面,所述第一延伸面自所述物侧面朝远离所述光轴的方向延伸,所述第二延伸面自所述像侧面朝远离所述光轴的方向延伸;
所述第一延伸面上开设有第一凹槽,所述第二延伸面上开设有第二凹槽,所述第二凹槽相对于所述第一凹槽更靠近所述光轴,所述第二凹槽内填充有黑色物质;
所述第一凹槽的沿所述光轴的延伸方向的尺寸为第一槽深,所述第二凹槽的沿所述光轴延伸方向的尺寸为第二槽深,所述第一延伸面与所述第二延伸面之间的距离为延伸厚度,所述延伸厚度小于或等于所述第一槽深与所述第二槽深之和。
作为一种改进,所述第一凹槽内填充有黑色物质。
作为一种改进,设定一垂直于所述光轴的第一平面,所述第一凹槽在所述第一平面上的投影与所述第二凹槽在所述第一平面上的投影彼此间隔。
作为一种改进,所述第二槽深大于所述延伸厚度的四分之一,且小于所述延伸厚度的三分之二。
作为一种改进,所述第一凹槽到所述光轴的距离、与所述第二凹槽到所述光轴之间的距离之差为槽间距,所述延伸部在垂直于所述光轴方向上的尺寸为延伸宽度,所述延伸宽度大于所述槽间距的两倍。
作为一种改进,所述第一凹槽为中心轴线与所述光轴重合的环形凹槽。
作为一种改进,所述第二凹槽为中心轴线与所述光轴重合的环形凹槽。
作为一种改进,所述第一凹槽的沿平行于所述光轴方向的截面呈矩形;所述第二凹槽的沿平行于所述光轴方向的截面呈矩形。
作为一种改进,所述第一凹槽与所述第二凹槽中的至少一个在垂直于所述光轴方向上的尺寸小于或等于0.1mm,所述黑色物质为黑色胶水或黑色塑胶。
本申请还提供了一种镜头模组,包括镜筒,以及上述玻璃镜片,所述玻璃镜片设置于所述镜筒内。
有益效果
本申请提供的玻璃镜片的有益效果在于:第二凹槽内的黑色物质能够吸收镜片各表面以及内部光反射造成的杂散光;第一凹槽能够改变杂散光的光路,使杂散光更多地被汇集到第二凹槽上,被第二凹槽内的黑色物质吸收,从而减小吸收杂散光的死角,提高黑色物质的有效吸光率,将更多的杂散光挡在光学部之外,进一步避免影响成像效果的杂散光照射入光学部内,从而优化镜头模组的成像效果。
本申请提供的镜头模组因采用了上述玻璃镜片而具备了玻璃镜片的有益效果,此处不再赘述。
附图说明
图1为本申请提供的玻璃镜片;
图2为本申请提供的镜头模组。
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。
请参阅图1,本申请公开了一种用于镜头模组10的玻璃镜片100,可以理解地,镜头模组10具有供光线射入的通光孔210,该玻璃镜片100包括光学部110和延伸部120,光学部110具有光轴OO',并包括有面向该通光孔210的物侧面111,以及背向通光孔210的像侧面112,延伸部120围绕在光学部110的四周,并包括第一延伸面121和第二延伸面122,该第一延伸面121与物侧面111相连,且第一延伸面121自物侧面111朝远离光轴OO’的方向延伸,第二延伸面122与像侧面112相连,且第二延伸面122自像侧面112朝远离光轴OO’的方向延伸,该延伸部120还包括连接第一延伸面121和第二延伸面122的连接面123,在本实施例中,第一延伸面121和第二延伸面122均与光轴OO'垂直,而连接面123与光轴OO'平行;在第一延伸面121上开设有第一凹槽124,在第二延伸面122上开设有第二凹槽125,并且上述第二凹槽125相对于第一凹槽124更加靠近光轴OO',在该第二凹槽125内填充有黑色物质;同时,在本实施例中,设定第一凹槽124的沿光轴OO'的延伸方向上的尺寸为第一槽深D1,设定第二凹槽125的沿光轴OO'的延伸方向上的尺寸为第二槽深D2,并且设定第一延伸面121与第二延伸面122的沿光轴OO'延伸方向上的距离为延伸厚度T,该延伸厚度T小于或等于第一槽深D1与第二槽深D2之和;如此,第二凹槽125内的黑色物质能够吸收镜片各表面以及内部光反射造成的杂散光;第一凹槽124能够改变杂散光的光路,使杂散光更多地被汇集到第二凹槽125上,被第二凹槽125内的黑色物质吸收,从而减小吸收杂散光的死角,提高黑色物质的有效吸光率,将更多的杂散光挡在光学部110之外,进一步避免影响成像效果的杂散光照射入光学部110内,从而优化镜头模组10的成像效果。
在一实施例中,第一凹槽124与第二凹槽125内均填充有黑色物质,这样,进一步扩大了对杂光的吸收范围,使得从更多方向反射或折射来的杂光均能被有效吸收,进一步优化镜头模组10的成像效果。
此外,第一凹槽124和第二凹槽125中的黑色物质的可选材质有多种,比如塑胶或者胶水等。从颜色的角度说,黑色是所有颜色中吸光效果最好的,所以,为了更多的吸收会对成像效果产生干扰的杂光,并进一步更好的提升成像品质,本实施例中,优选采用黑色的塑胶或者黑色的胶水,可以理解的是,第一凹槽124和第二凹槽125中的填充的也可以是其他深色或者其他材质。
为了使杂光的吸收率更高,将上述玻璃镜片100的如下参数进行了优化:
设定一垂直于光轴OO'的第一平面,第一凹槽124在第一平面上的投影与第二凹槽125在第一平面上的投影彼此间隔,即二者不交叠,也即第一凹槽124在第一平面上的投影与第二凹槽125在第一平面上的投影既不交叉也不重合;
第二槽深D2大于延伸厚度T的四分之一,且小于延伸厚度T的三分之二;
将上述第一凹槽124到光轴OO’的距离与第二凹槽125到光轴OO'的距离之差称为槽间距S,将延伸部120在垂直于光轴OO’方向上的尺寸称为延伸宽度L,该延伸宽度L大于槽间距S的两倍;也可以表达为:设定一位于第一平面内的参考圆,参考圆的圆心在光轴OO'上,设定第一凹槽124与第二凹槽125的沿参考圆的任一直径方向上的距离为槽间距S,设定延伸部120的沿参考圆的任一直径方向上的尺寸为延伸宽度L,延伸宽度L大于槽间距S的两倍。
可以理解地,上述结构优化方案只本实施例的一个优选方案,可根据具体需要进行适当的调整,此处不做唯一限定。
在一实施例中,第一凹槽124与第二凹槽125中的至少一个在垂直于光轴OO’方向上的尺寸小于或等于0.1mm。也即,第一凹槽124在垂直于光轴OO’方向上的尺寸小于或等于0.1mm,或者第二凹槽125在垂直于光轴OO’方向上的尺寸小于或等于0.1mm,亦或第一凹槽124与第二凹槽125在垂直于光轴OO’方向上的尺寸均小于或等于0.1mm。优选地,在本实施例中,第二凹槽125的沿参考圆的任一直径方向上的尺寸为0.1mm。
在一实施例中,第一凹槽124和第二凹槽125均为环形凹槽,且第一凹槽124的中心轴线和第二凹槽125的中心轴线与光轴OO'重合。这样,从外观上看,环形的结构可以线条更为圆润美观,从结构上看,环形结构可以方面黑色物质顺利均匀地布满凹槽,并且能够更大范围地阻挡杂光进入到光学部110内;当然在本申请的其他实施例中,第一凹槽124和第二凹槽125也可以均不为环形结构,或者第一凹槽124和第二凹槽125中的一个为环形结构,而另一个为非环形结构,应根据具体需要而定,此处不作唯一限定。
另外,第一凹槽124的沿平行于光轴OO’方向的截面呈矩形,第二凹槽125的沿平行于光轴OO’方向的截面也呈矩形;也可以表达为:设定过光轴OO'的任一平面为第二平面,第一凹槽124的平行于第二平面的截面呈矩形;第二凹槽125的平行于第二平面的截面呈矩形。这样的凹槽不仅便于加工,还对玻璃镜片100的整体结构强度影响较小。
请参阅图1至图2,本申请还提供了一种镜头模组10,该镜头模组10包括镜筒200和上述玻璃镜片100,以及与上述玻璃镜片100层叠设置的第一镜片300和第二镜片400;镜筒200上开设有通光孔210,以及与通光孔210连通的容纳腔,该第一镜片300设置在玻璃镜片100的物侧面111所在的一侧,第二镜片400设置在玻璃镜片100的像侧面112所在的一侧。当然在本申请的其他实施例中,第一镜片300和第二镜片400均可以根据实际情况增加或减少数量,此处不做唯一限定。
本申请提供的镜头模组10,因采用了上述玻璃镜片100,而具备了上述玻璃镜片100所具有的所有有益效果,此处不再赘述。
以上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 (10)

  1. 一种玻璃镜片,用于镜头模组,其特征在于,所述玻璃镜片包括具有光轴的光学部,以及围绕于所述光学部四周的延伸部,所述光学部包括物侧面以及与所述物侧面相对的像侧面,所述延伸部包括相对设置的第一延伸面和第二延伸面,所述第一延伸面自所述物侧面朝远离所述光轴的方向延伸,所述第二延伸面自所述像侧面朝远离所述光轴的方向延伸;
    所述第一延伸面上开设有第一凹槽,所述第二延伸面上开设有第二凹槽,所述第二凹槽相对于所述第一凹槽更靠近所述光轴,所述第二凹槽内填充有黑色物质;
    所述第一凹槽的沿所述光轴的延伸方向的尺寸为第一槽深,所述第二凹槽的沿所述光轴延伸方向的尺寸为第二槽深,所述第一延伸面与所述第二延伸面之间的距离为延伸厚度,所述延伸厚度小于或等于所述第一槽深与所述第二槽深之和。
  2. 根据权利要求1所述的玻璃镜片,其特征在于:所述第一凹槽内填充有黑色物质。
  3. 根据权利要求1所述的玻璃镜片,其特征在于:设定一垂直于所述光轴的第一平面,所述第一凹槽在所述第一平面上的投影与所述第二凹槽在所述第一平面上的投影彼此间隔。
  4. 根据权利要求1所述的玻璃镜片,其特征在于:所述第二槽深大于所述延伸厚度的四分之一,且小于所述延伸厚度的三分之二。
  5. 根据权利要求1所述的玻璃镜片,其特征在于:所述第一凹槽到所述光轴的距离与所述第二凹槽到所述光轴之间的距离之差为槽间距,所述延伸部在垂直于所述光轴方向上的尺寸为延伸宽度,所述延伸宽度大于所述槽间距的两倍。
  6. 根据权利要求1所述的玻璃镜片,其特征在于:所述第一凹槽为中心轴线与所述光轴重合的环形凹槽。
  7. 根据权利要求6所述的玻璃镜片,其特征在于:所述第二凹槽为中心轴线与所述光轴重合的环形凹槽。
  8. 根据权利要求1所述的玻璃镜片,其特征在于:所述第一凹槽的沿平行于光轴方向的截面呈矩形;所述第二凹槽的沿平行于所述光轴方向的截面呈矩形。
  9. 根据权利要求1至8任一项所述的玻璃镜片,其特征在于:所述第一凹槽与所述第二凹槽中的至少一个沿在垂直于所述光轴方向上的尺寸小于或等于0.1mm,所述黑色物质为黑色胶水或黑色塑胶。
  10. 一种镜头模组,其特征在于:包括镜筒,以及权利要求1至9任一项所述玻璃镜片,所述玻璃镜片设置于所述镜筒内。
PCT/CN2019/113867 2018-12-30 2019-10-29 玻璃镜片及镜头模组 WO2020140592A1 (zh)

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