WO2022188247A1 - 镜头 - Google Patents

镜头 Download PDF

Info

Publication number
WO2022188247A1
WO2022188247A1 PCT/CN2021/089404 CN2021089404W WO2022188247A1 WO 2022188247 A1 WO2022188247 A1 WO 2022188247A1 CN 2021089404 W CN2021089404 W CN 2021089404W WO 2022188247 A1 WO2022188247 A1 WO 2022188247A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
annular surface
sealing
present
lens barrel
Prior art date
Application number
PCT/CN2021/089404
Other languages
English (en)
French (fr)
Inventor
张扣文
徐绅威
唐新科
丁志
Original Assignee
浙江舜宇智领技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 浙江舜宇智领技术有限公司 filed Critical 浙江舜宇智领技术有限公司
Publication of WO2022188247A1 publication Critical patent/WO2022188247A1/zh

Links

Images

Classifications

    • 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
    • G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens

Definitions

  • the present invention relates to the field of optical technology, and in particular, to a lens.
  • the in-vehicle surround view camera can provide more intuitive assisted driving image information for car driving, so that the driver can see the surrounding situation from the display screen in all directions and provide driving safety.
  • drastic temperature changes or inclement weather can cause the camera to fog up, preventing a clear image on the car's display, impairing the driver's ability to see objects around the vehicle. Therefore, how to prevent camera fogging is an important direction for the development of automotive vision technology.
  • the purpose of the present invention is to solve the above-mentioned problems, and to provide a lens, which solves the problem of easy fogging of the existing lens.
  • the present invention provides a lens, comprising a lens barrel and a lens group arranged in the lens barrel, along the direction from the object side to the image side, the lens group at least includes a first lens and a second lens,
  • the image side of the first lens has a groove, the groove includes an annular surface parallel to the optical axis and a connecting surface located on the outer periphery of the annular surface and perpendicular to the annular surface, and a sealing ring is provided on the annular surface For the sealing of the first lens and the lens barrel.
  • connection point of the annular surface and the connection surface is located between the 180° optical path and the 190° optical path of the first lens.
  • the image side surface of the first lens further comprises a receiving surface located inside the annular surface and perpendicular to the annular surface;
  • the receiving surface abuts against the second lens.
  • the lens barrel is provided with a first plane, a second annular surface located on the outer circumference of the first plane and perpendicular to the first plane, and a second annular surface located on the outer circumference of the second annular surface and the a second plane perpendicular to the second annular surface;
  • the sealing ring is in contact with the annular surface, the first flat surface, the second annular surface and parts of the connecting surface.
  • the thickness from the second annular surface to the outer side surface of the lens barrel is 3 times or more than the width of the sealing ring.
  • the lens barrel is further provided with a sealing surface on the outer periphery of the second plane perpendicular to the second plane;
  • the first lens is further provided with a second sealing surface located on the outer periphery of the connecting surface and connected to the connecting surface;
  • the sealing surface is in abutting sealing connection with the second sealing surface.
  • the object side surface of the second lens 3 is convex.
  • connection point between the annular surface and the connecting surface of the present invention is located between the 180° optical path and the 190° optical path of the first lens. This arrangement can reduce the probability of fogging on the inner surface of the first lens, avoid affecting the 180° optical path of the lens, and at the same time help to eliminate stray light and improve the imaging quality of the lens.
  • the sealing ring of the present invention is in contact with the annular surface, the first flat surface, the second annular surface and parts of the connecting surface.
  • the step surface of the lens barrel is raised, the volume of the cavity of the lens barrel is reduced, and the position of the sealing ring is moved inward along the direction perpendicular to the optical axis, which reduces the non-destructive effect of the lens.
  • the volume of the clear surface significantly reduces the probability of water mist on the inner surface of the first lens.
  • the thickness of the second annular surface of the present invention to the outer surface of the lens barrel is 3 times or more than the width of the sealing ring.
  • FIG. 1 schematically shows a cross-sectional view of a lens in the prior art
  • FIG. 2 schematically shows a cross-sectional view of a lens according to an embodiment of the present invention
  • Fig. 3 is a schematic diagram showing the setting position of the connection point between the annular surface and the connection surface according to the embodiment
  • FIG. 4 schematically shows a cross-sectional view of a lens according to a second embodiment of the present invention.
  • a conventional lens in the current prior art includes a lens barrel 1a, and a first lens 2a and a second lens 3a are arranged in the lens barrel 1a.
  • the first lens 2a and the lens barrel 1a are sealed by a sealing ring 4a.
  • the water vapor in the cavity of the non-light-transmitting surface of the lens and the hot air in the cavity of the lens barrel will enter the clear light of the first lens 2a through the gap In the surface cavity, droplets are deposited on the inner surface of the first lens 2a to cause fogging.
  • the lens of the present invention can effectively solve the above problems by optimizing the settings for its internal structure.
  • the lens of the present invention includes a lens barrel 1 and a lens group arranged in the lens barrel 1 .
  • the lens group includes at least a first lens 2 and a second lens 3, that is, according to the concept of the present invention, more lenses can be provided after the second lens 3 as required.
  • the image side surface of the first lens 2 of the present invention has a groove 21.
  • the groove 21 includes an annular surface 211 parallel to the optical axis and a connecting surface 212 located on the outer circumference of the annular surface 211 and vertically connected to the annular surface 211.
  • the diameter of the annular surface 211 is less than or equal to
  • the inner diameter of the lens barrel 1 and the annular surface 211 are provided with a sealing ring 4 for sealing the first lens 2 and the lens barrel 1 .
  • the image side surface of the first lens 2 of the present invention further includes a receiving surface 22 located inside the annular surface 211 and perpendicular to the annular surface 211 , and the receiving surface 22 abuts against the second lens 3 .
  • the lens of the present invention can reduce the volume of the non-light-transmitting surface to the greatest extent while the sealing ring 4 plays a sealing role, which is beneficial to reduce the probability of fogging on the inner surface of the first lens 2 .
  • connection point between the annular surface 211 and the connection surface 212 of the present invention is located between the 180° optical path and the 190° optical path of the first lens 2 .
  • This setting ensures that the connection point will not affect the 180° optical path, ensuring the imaging range of the 180° optical path that the lens can provide.
  • setting the connection point between the 180° optical path and the 190° optical path can maximize the inward movement of the sealing ring 4.
  • the sealing ring 4 also has the function of eliminating stray light beyond 180°, improving the imaging of the lens. quality.
  • the lens barrel 1 of the present invention is provided with a first plane 11, a second annular surface 12 located on the outer periphery of the first plane 11 and perpendicular to the first plane 11,
  • the outer circumference of the second annular surface 12 is perpendicular to the second flat surface 13 of the second annular surface 12
  • the connecting surface 212 is in contact with the second flat surface 13 or has a space therebetween.
  • the sealing ring 4 of the present invention is in contact with the annular surface 211 , the first flat surface 11 , the second annular surface 12 and parts of the connecting surface 212 .
  • the step surface of the lens barrel is raised, the volume of the cavity of the lens barrel is reduced, and the position of the sealing ring 4 is moved inward along the direction perpendicular to the optical axis, reducing the size of the lens.
  • the volume of the non-light-transmitting surface significantly reduces the occurrence probability of water mist on the inner surface of the first lens 2 .
  • the lens barrel 1 is further provided with a sealing surface 14 located on the outer periphery of the second plane 13 and perpendicular to the second plane 13
  • the first lens 2 is also provided with a sealing surface 14 located on the connecting
  • the outer circumference of the surface 212 is connected with the second sealing surface 23 of the connecting surface 212
  • the sealing surface 14 and the second sealing surface 24 are abutted and connected in a sealing manner.
  • the sealing ring 4 and the first lens 2 of the present invention are connected to the lens barrel 1 in a stepped shape.
  • the thickness of the second annular surface 12 of the lens barrel 1 of the present invention is 3 times or more the width of the sealing ring 4, that is, the thickness from the second annular surface 12 to the outer surface of the lens barrel 1 is 3 times the width of the sealing ring 4 and Above, preferably 3-5 times.
  • the thickness of the lens barrel 1 at the sealing ring 4 is relatively thick, even if the sealing ring is subjected to a pressing force to generate a lateral elastic force, the lens barrel 1 is not easily stretched by the sealing ring, and the first lens 2 will not loosen. , which can effectively ensure the coaxiality and waterproof performance of the lens.
  • the thickness of the first lens 2 of the present invention is greater than that of the first lens 2 in the embodiment shown in FIG. 2 , and the object side of the second lens 3 is provided Convex, the rest of the settings are exactly the same as the embodiment in FIG. 2 .
  • the lens of the present invention is provided, because the thickness of the first lens 2 is thickened, and the object side of the second lens 3 is convex, which effectively reduces the cavity volume of the light-transmitting surface of the lens, thereby significantly reducing the first lens 2 Probability of water mist phenomenon on inner surface.

Landscapes

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

Abstract

一种镜头，包括镜筒(1)和设置在镜筒(1)内的透镜组，沿物侧至像侧方向，透镜组至少包括第一镜片(2)和第二镜片(3)，第一镜片(2)像侧面具有凹槽(21)，凹槽(21)包括与光轴平行的环形面(211)和位于环形面(211)外周与环形面(211)垂直连接的连接面(212)，环形面(211)上设有密封圈(4)用于第一镜片(2)和镜筒(1)的密封。这种镜头可有效降低第一镜片(2)内表面发生水雾现象的概率。

Description

镜头
本申请要求于2021年03月12日提交中国专利局、申请号为202110272282.0、申请名称为“镜头”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及光学技术领域，尤其涉及一种镜头。
背景技术
车载环视摄像头可以为汽车驾驶提供更为直观的辅助驾驶图像信息，让驾驶员可以从显示屏上全方位的看到周边的情况，提供行车安全性。然而，剧烈的温度变化或恶劣的气候可能导致摄像头起雾，导致无法在汽车的显示屏上清晰地显示图像，从而削弱驾驶员看清车辆周围物体的能力。因此，如何预防摄像头起雾是汽车视觉技术发展的一个重要方向。
发明内容
本发明的目的在于解决上述问题，提供一种镜头，解决现有镜头容易起雾的问题。
为实现本发明的上述目的，本发明提供一种镜头，包括镜筒和设置在镜筒内的透镜组，沿物侧至像侧方向，所述透镜组至少包括第一镜片和第二镜片，所述第一镜片像侧面具有凹槽，所述凹槽包括与光轴平行的环形面和位于所述环形面外周与所述环形面垂直连接的连接面，所述环形面上设有密封圈用于所述第一镜片和镜筒的密封。
根据本发明的一个方面，所述环形面与所述连接面的连接点位于所述第一镜片的180°光路和190°光路之间。
根据本发明的一个方面，所述第一镜片的像侧面还包括位于所述环形面内侧与所述环形面相垂直的承接面；
所述承接面与所述第二镜片相抵靠。
根据本发明的一个方面，所述镜筒上设有第一平面、位于所述第一平面外周与所述第一平面相垂直的第二环形面、位于所述第二环形面外周与所述第二环形面相垂直的第二平面；
所述密封圈与环形面、第一平面、第二环形面以及连接面的部分相接触。
根据本发明的一个方面，所述第二环形面到所述镜筒外侧面的厚度为所述密封圈宽度的3倍及以上。
根据本发明的一个方面，所述镜筒上还设有位于所述第二平面外周与所述第二平面相垂直的密封面；
所述第一镜片上还设有位于所述连接面外周与所述连接面相连接的第二密封面；
所述密封面与所述第二密封面相抵靠密封连接。
根据本发明的一个方面，所述第二镜片3的物侧面为凸面。
本发明的环形面与连接面的连接点位于第一镜片的180°光路和190°光路之间。如此设置，在减小第一镜片内表面起雾现象概率的同时，避免对于镜头180°光路造成影响，同时有利于消除杂散光，提升镜头的成像品质。
本发明的密封圈与环形面、第一平面、第二环形面以及连接面的部分相接触。如此设置，相比于现有技术中的镜头，升高了镜筒台阶面，减小了镜筒空腔体积，同时使得密封圈的位置沿垂直于光轴方向内移，减小了镜片非通光面体积，显著降低第一镜片内表面水雾发生概率。
本发明的第二环形面到所述镜筒外侧面的厚度为所述密封圈宽度的3倍及以上。上述设置，由于密封圈处的镜筒的厚度较厚，即使密封圈受到挤压力产生侧向弹力，镜筒也不容易被密封圈撑开，第一镜片不会发生松动，进而可有效保证镜头的同轴度和防水性能。
附图说明
图1示意性表示现有技术中的镜头的剖视图；
图2示意性表示根据本发明一种实施方式的镜头的剖视图；
图3示意性表示根据的环形面与连接面的连接点的设置位置示图；
图4示意性表示根据本发明第二种实施方式的镜头的剖视图。
具体实施方式
为了更清楚地说明本发明实施方式或现有技术中的技术方案，下面将对实施方式中所需要使用的附图作简单地介绍。显而易见地，下面描述中的附图仅仅是本发明的一些实施方式，对于本领域普通技术人员而言，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
下面结合附图和具体实施方式对本发明作详细地描述，实施方式不能在此一一赘述，但本发明的实施方式并不因此限定于以下实施方式。
如图1所示，目前现有技术中的常规镜头包括镜筒1a，镜筒1a中设置第一镜片2a和第二镜片3a。第一镜片2a与镜筒1a通过密封圈4a密封。通常在第一镜片2a和第二镜片3a之间存在较大空腔，包括镜筒空腔C、镜片非通光面空腔B和镜片通光面空腔A。当第一镜片2a内侧冷表面温度低于腔体内热空气的露点温度时，镜片非通光面空腔与镜筒空腔的热空气中的水蒸气都会通过缝隙进入第一镜片2a的通光面腔体中，在第一镜片2a内表面上析出液滴而发生起雾现象。
本发明的镜头通过针对其内部结构的优化设置可以有效解决上述问题。本发明镜头包括镜筒1和设置在镜筒1内的透镜组。沿物侧至像侧方向，透镜组至少包括第一镜片2和第二镜片3，即根据本发明的构思，在第二镜片3之后还可以根据需要设置更多的镜片。
本发明的第一镜片2像侧面具有凹槽21，凹槽21包括与光轴平行的环形面211和位于环形面211外周与环形面211垂直连接的连接面212，环形面211的直径小于等于镜筒1的内径，环形面211上设有密封圈4用于第一镜片2和镜筒1的密封。如图2所示，本发明的第一镜片2的像侧面还包括位于环形面211内侧与环形面211相垂直的承接面22，承接面22与第二镜片3相抵靠。
本发明镜头，按照上述设置，密封圈4起到密封作用的同时，可以最大程度的减小非通光面的体积，有利于减小第一镜片2内表面发生起雾现 象的概率。
如图3所示，本发明的环形面211与连接面212的连接点位于第一镜片2的180°光路和190°光路之间。如此设置，使得连接点不会影响到180°光路，确保镜头能够的180°光路的成像范围。另一方面，将连接点设置在180°光路和190°光路之间，可以使密封圈4做到最大化内移，同时密封圈4还具有消除180°以外杂散光的作用，提升镜头的成像品质。
如图2所示，根据本发明的一种实施方式，本发明的镜筒1上设有第一平面11、位于第一平面11外周与第一平面11相垂直的第二环形面12、位于第二环形面12外周与第二环形面12相垂直的第二平面13，连接面212与第二平面13相接触或具有间隔。本发明的密封圈4与环形面211、第一平面11、第二环形面12以及连接面212的部分相接触。如此设置，相比于现有技术中的镜头，升高了镜筒台阶面，减小了镜筒空腔体积，同时使得密封圈4的位置沿垂直于光轴方向内移，减小了镜片非通光面体积，显著降低第一镜片2内表面水雾发生概率。
如图2所示，根据本发明的一种实施方式，镜筒1上还设有位于第二平面13外周与第二平面13相垂直的密封面14，第一镜片2上还设有位于连接面212外周与连接面212相连接的第二密封面23，密封面14与第二密封面24相抵靠密封连接。如此设置，使得本发明的密封圈4和第一镜片2与镜筒1呈阶梯状连接。
此外，本发明的镜筒1的第二环形面12处厚度为密封圈4宽度的3倍及以上，即第二环形面12到镜筒1外侧面的厚度为密封圈4宽度的3倍及以上，优选为3-5倍。满足上述设置，由于密封圈4处的镜筒1的厚度较厚，即使密封圈受到挤压力产生侧向弹力，镜筒1也不容易被密封圈撑开，第一镜片2不会发生松动，进而可有效保证镜头的同轴度和防水性能。
如图4所示，根据本发明的第二种实施方式，本发明的第一镜片2的厚度大于图2中所示实施方式中的第一镜片2的厚度，第二镜片3的物侧面设置凸面，其余设置与图2中实施方式完全一致。按照本实施方式设置本发明的镜头，由于第一镜片2的厚度加厚，第二镜片3的物侧面为凸面，从而有效减小了镜片通光面空腔体积，进而显著降低第一镜片2内表面发 生水雾现象的概率。
以上所述仅为本发明的一个实施方式而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (7)

  1. 一种镜头，包括镜筒(1)和设置在镜筒(1)内的透镜组，沿物侧至像侧方向，所述透镜组至少包括第一镜片(2)和第二镜片(3)，其特征在于，所述第一镜片(2)像侧面具有凹槽(21)，所述凹槽(21)包括与光轴平行的环形面(211)和位于所述环形面(211)外周与所述环形面(211)垂直连接的连接面(212)，所述环形面(211)上设有密封圈(4)用于所述第一镜片(2)和镜筒(1)的密封。
  2. 根据权利要求1所述的镜头，其特征在于，所述环形面(211)与所述连接面(212)的连接点位于所述第一镜片(2)的180°光路和190°光路之间。
  3. 根据权利要求1所述的镜头，其特征在于，所述第一镜片(2)的像侧面还包括位于所述环形面(211)内侧与所述环形面(211)相垂直的承接面(22)；
    所述承接面(22)与所述第二镜片(3)相抵靠。
  4. 根据权利要求1所述的镜头，其特征在于，所述镜筒(1)上设有第一平面(11)、位于所述第一平面(11)外周与所述第一平面(11)相垂直的第二环形面(12)、位于所述第二环形面(12)外周与所述第二环形面(12)相垂直的第二平面(13)；
    所述密封圈(4)与环形面(211)、第一平面(11)、第二环形面(12)以及连接面(212)的部分相接触。
  5. 根据权利要求4所述的镜头，其特征在于，所述第二环形面(12)到所述镜筒(1)外侧面的厚度为所述密封圈(4)宽度的3倍及以上。
  6. 根据权利要求4或5所述的镜头，其特征在于，所述镜筒(1)上还设有位于所述第二平面(13)外周与所述第二平面(13)相垂直的密封面(14)；
    所述第一镜片(2)上还设有位于所述连接面(212)外周与所述连接面(212)相连接的第二密封面(23)；
    所述密封面(14)与所述第二密封面(24)相抵靠密封连接。
  7. 根据权利要求1所述的镜头，其特征在于，所述第二镜片(3)的物侧面为凸面。
PCT/CN2021/089404 2021-03-12 2021-04-23 镜头 WO2022188247A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110272282.0 2021-03-12
CN202110272282.0A CN112799199A (zh) 2021-03-12 2021-03-12 镜头

Publications (1)

Publication Number Publication Date
WO2022188247A1 true WO2022188247A1 (zh) 2022-09-15

Family

ID=75817026

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/089404 WO2022188247A1 (zh) 2021-03-12 2021-04-23 镜头

Country Status (2)

Country Link
CN (1) CN112799199A (zh)
WO (1) WO2022188247A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115514833B (zh) * 2021-06-23 2024-02-27 Oppo广东移动通信有限公司 摄像头组件及电子设备
CN115047580A (zh) * 2022-05-16 2022-09-13 浙江舜宇智领技术有限公司 一种成像镜头

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015125363A (ja) * 2013-12-27 2015-07-06 日本電産コパル株式会社 レンズユニット及び撮像装置
JP2018194715A (ja) * 2017-05-19 2018-12-06 マクセル株式会社 レンズユニットおよびカメラモジュール
CN209148937U (zh) * 2018-11-14 2019-07-23 宁波舜宇车载光学技术有限公司 密封圈组装结构及具有其的光学镜头
CN211149027U (zh) * 2019-12-02 2020-07-31 中山联合光电科技股份有限公司 一种双重防水结构

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015125363A (ja) * 2013-12-27 2015-07-06 日本電産コパル株式会社 レンズユニット及び撮像装置
JP2018194715A (ja) * 2017-05-19 2018-12-06 マクセル株式会社 レンズユニットおよびカメラモジュール
CN209148937U (zh) * 2018-11-14 2019-07-23 宁波舜宇车载光学技术有限公司 密封圈组装结构及具有其的光学镜头
CN211149027U (zh) * 2019-12-02 2020-07-31 中山联合光电科技股份有限公司 一种双重防水结构

Also Published As

Publication number Publication date
CN112799199A (zh) 2021-05-14

Similar Documents

Publication Publication Date Title
WO2022188247A1 (zh) 镜头
JP6234676B2 (ja) レンズユニット
EP3798708A1 (en) Onboard camera lens
US20130063822A1 (en) Lens module having light-shielding plate
CN105044885A (zh) 一种用于车载监控的光学成像系统
US11372313B2 (en) Lens unit
CN210090801U (zh) 镜头模组
CN209356747U (zh) 一种大靶面广角镜头光学系统
CN204883028U (zh) 一种用于车载监控的光学成像系统
JP2013255064A (ja) 写り込み低減車載カメラシステム
CN103439782A (zh) 2.8定焦超广角镜头
CN111198465A (zh) 挡环及采用该挡环的镜头
CN111736324A (zh) 一种广角光学镜头
CN107153249B (zh) 一种车载后视用广角镜头
CN110785690A (zh) 透镜单元
WO2023221637A1 (zh) 一种成像镜头
CN210720981U (zh) 运动相机镜头保护结构及运动相机
CN206321856U (zh) 一种高清广角镜头
CN206162044U (zh) 一种消重影车载投影镜头
CN208836244U (zh) 一种超广角防夜视反光的摄像机
CN216083249U (zh) 一种使用非球面模造玻璃的百万高清镜头
TWI795327B (zh) 鏡頭模組
CN208780894U (zh) 一种高清广角无人机镜头
CN219715784U (zh) 一种车载环视镜头
CN208780899U (zh) 一种无畸变高分辨率大视角无人机镜头光学系统

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21929719

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21929719

Country of ref document: EP

Kind code of ref document: A1