WO2016176911A1 - 小型广角镜头 - Google Patents

小型广角镜头 Download PDF

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Publication number
WO2016176911A1
WO2016176911A1 PCT/CN2015/083707 CN2015083707W WO2016176911A1 WO 2016176911 A1 WO2016176911 A1 WO 2016176911A1 CN 2015083707 W CN2015083707 W CN 2015083707W WO 2016176911 A1 WO2016176911 A1 WO 2016176911A1
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lens
small
wide
angle
angle lens
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PCT/CN2015/083707
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French (fr)
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盛亚茗
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嘉兴中润光学科技有限公司
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces

Definitions

  • the invention relates to the field of wide-angle lens technology, in particular to a small wide-angle lens.
  • Optical lenses as visual information receiving organs that replace people's eyes, have been widely used in various fields.
  • Wide-angle lenses are needed to increase the field of view when imaging devices are used in certain areas.
  • Wide-angle lenses are an important component of some large field of view projects, such as surveillance devices, car wide-angle imaging systems.
  • the development of imaging detector technology has greatly improved the resolution and number of pixels of the detector.
  • the quality of the lens, the size of the field of view, and the distortion of the lens determine the pros and cons of the wide-angle lens. Therefore, the performance and field of view of the lens become an important consideration in designing a wide-angle lens.
  • the wide-angle lens of the known technology mostly adopts a structure in which the front group lens is a negative power and the rear group lens is a positive power, thereby improving the angle of view of the wide-angle lens.
  • the front group lens is a negative power
  • the rear group lens is a positive power
  • digital imaging systems In order to ensure the imaging quality and high brightness of high-resolution cameras, while achieving a sufficient angle of view, digital imaging systems often need to increase the number of lenses; or use an aspheric lens to correct aberrations, thereby improving image quality, but The length of this product is far from being light, thin and short, and the production cost of the lens is high.
  • this type of wide-angle lens suitable for about 1/3" inch size is generally large in size and has a length of about 23 mm.
  • optical lenses are increasingly used in various smart devices.
  • the present invention overcomes the above-mentioned shortcomings of the prior art, and provides a small wide-angle lens having the advantages of high image quality, large field of view, small volume, low manufacturing cost, and insensitivity to changes in ambient temperature.
  • a small wide-angle lens characterized in that, from the object side to the image side, a first lens combination having a negative focal length, a stop, a second lens combination having a positive focal length, a filter and a cover glass; and a first lens combination A first lens having negative power, a second lens having negative power, and a third lens having positive power; the second lens combination is composed of a fourth lens, a fifth lens, and a sixth lens, wherein The four lenses and the fifth lens have a positive power after being glued, and the sixth lens has a positive power.
  • the small-sized wide-angle lens described above is characterized in that the small wide-angle lens satisfies the following condition: 1.0 ⁇
  • D is the distance from the object side surface of the first spherical lens of the small wide-angle lens to the imaging surface in the optical axis direction
  • f 1 is the effective focal length of the first lens combination of the small wide-angle lens.
  • the small-sized wide-angle lens described above is characterized in that the small wide-angle lens satisfies the following condition: 2.0 ⁇
  • D is the distance from the object side surface of the first spherical lens of the small wide-angle lens to the imaging surface in the optical axis direction
  • f 2 is the effective focal length of the second lens combination of the small wide-angle lens.
  • the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are all made of a glass material.
  • the small wide-angle lens described above is characterized in that an aperture is provided between the third lens and the fourth lens.
  • the above small wide-angle lens is characterized in that all surfaces of the small wide-angle lens are spherical;
  • the above small-sized wide-angle lens is characterized in that: the fourth spherical lens includes a fourth image end surface, and the fifth lens includes a fifth object end surface, the fourth image end surface and the fifth object end surface Glue fixed.
  • the utility model eliminates the spacer ring between the G3 and 4 lenses, and uses the lock chip.
  • the utility model has the advantages that the miniaturization is effectively ensured. All use glass lenses to warm the environment The degree of change is not sensitive and can be applied to temperatures ranging from -10 ° C to 85 ° C. Based on this, the utility model can be applied to various smart devices.
  • Embodiment 1 is a schematic structural view of Embodiment 1 of a small wide-angle lens provided by the present invention
  • Figure 2 is a spherical aberration diagram of Embodiment 1;
  • Figure 3 is a field curvature diagram of Embodiment 1;
  • Figure 4 is a distortion diagram of Embodiment 1;
  • Figure 5 is an optical transfer function curve of Example 1
  • the present invention is composed of six lenses, and the first lens E1, the second lens E2, the third lens E3, the pupil, the fourth lens E4, and the like from the object side to the image side.
  • the two faces of the first lens E1 are respectively S1 and S2; the two faces of the second lens E2 are respectively S3 and S4; and the two faces of the third lens E3 are respectively S5 and S6.
  • the pupil plane is S7; the three faces after the fourth lens E4 and the fifth lens E5 are glued are S8, S9, S10; the two faces of the sixth lens E6 are S11 and S12 respectively; and the two faces of the filter E7 are respectively The faces are S13 and S14, respectively; the two faces of the protective glass E8 are S15 and S16, respectively.
  • Example 1 satisfies the conditions of Table 1:
  • Embodiment 1 lens structure parameters
  • the spherical aberration diagram, the field curvature diagram, the distortion diagram, and the optical transfer function diagram are respectively shown in FIG. 2 to FIG. 5, and it can be seen from the figure that the present invention has better optical performance.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

一种小型广角镜头，其特征在于，从物方一侧到像方一侧依次为：具有负焦距的第一镜片组合、光阑、具有正焦距的第二镜片组合、滤光片（E7）和保护玻璃（E8）；第一镜片组合包括具有负光焦度的第一透镜（E1）、具有负光焦度的第二透镜（E2）和具有正光焦度的第三透镜（E3）；第二镜片组合由第四透镜（E4）、第五透镜（E5）和第六透镜（E6）组成，第四透镜（E4）和第五透镜（E5）胶合后具有正光焦度，第六透镜（E6）具有正光焦度。本***采用六片全玻璃透镜结构，结构紧凑、有良好的加工工艺性、生产成本低。实现了水平视角130度以上，光学总长(TTL)比市面上类似镜头要小30％左右，不但可以作为基础类型的广角车载镜头，而且小型化的特点使其可以更广泛地安装在各类家居设备中。

Description

小型广角镜头 (一)技术领域
本发明涉及广角镜头技术领域，特别是小型广角镜头。
(二)背景技术
光学镜头作为代替人们眼睛的视觉信息接收器官，已经被广泛应用在各个领域中。当影像装置应用与某些特定领域中时，会需要广角镜头以增加视场。广角镜头是一些大视场项目的重要组件，如监控装置、车载广角成像***。同时，成像探测器技术的发展，大大提高了探测器的分辨率和像素数量。镜头的成像质量、视场的大小及镜头的畸变决定广角镜头的优劣，因而镜头的性能及视场成为设计广角镜头的重要考虑因素。
目前已知技术的广角镜头，大多采用前群透镜为负光焦度、后群透镜为正光焦度的架构，借此提高广角镜头的视角。但是此类广角镜头的像差、图像分辨率及环境温度变化对光学性能的影响等问题尚有许多改善空间。为了保证高分辨率摄像机的成像品质和高亮度，同时达到足够的视场角，数码成像***往往需要增加透镜的数量；或采用非球面透镜的方法来校正像差，以此提高成像质量，但这种产品长度远远达不到轻薄短小的要求，且镜头的生产成本较高。目前这一类适用于1/3”英寸左右尺寸的广角镜头，一般尺寸都较大，长度在23mm左右。光学镜头作为各种智能设备的接入口，被越来越多的用在各种智能设备中，但目前市场上缺乏一款兼具高清晰度、大视场角的小型化的广角镜头。
因此，有必要提供一种小型化、高成像质量、广角、成本低同时对环境温度变化不敏感的广角镜头。
(三)发明内容
本发明要克服现有技术的上述缺点，提供了一种小型广角镜头，具有成像质量高，视场角大，体积小，制造成本低，对环境温度变化不敏感等优点。
为了实现上述目的，本发明采用的技术方案为：
一种小型广角镜头，其特征在于，从物侧到像侧依次为：具有负焦距的第一镜片组合、光阑、具有正焦距的第二镜片组合、滤光片和保护玻璃；第一镜片组合包括具有负光焦度的第一透镜、具有负光焦度的第二透镜和具有正光焦度的第三透镜；第二镜片组合由第四透镜、第五透镜和第六透镜组成，其中第四透镜和第五透镜胶合后具有正光焦度，第六透镜具有正光焦度。
上述小型广角镜头，其特征在于：所述小型广角镜头满足下列的条件:1.0<|D/f1|<5.0。其中D为该小型广角镜头第一球面透镜之物侧表面至成像面沿光轴方向上的距离，f1为该小型广角镜头第一镜头组合的有效焦距。
上述小型广角镜头，其特征在于：所述小型广角镜头满足下列的条件:2.0<|D/f2|<6.0。其中D为该小型广角镜头第一球面透镜之物侧表面至成像面沿光轴方向上的距离，f2为该小型广角镜头第二镜头组合的有效焦距。
上述小型广角镜头，其特征在于，所述的第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜均采用玻璃材料制成。
上述小型广角镜头，其特征在于：在第三透镜和第四透镜之间设置有光阑。
上述小型广角镜头，其特征在于：该小型广角镜头所有表面均为球面；
上述小型广角镜头，其特征在于：所述第四球面透镜包括一个第四像端表面，所述第五透镜包括一个第五物端表面，所述第四像端表面与所述第五物端表面胶合固定。
与以往技术相比，本实用新型在G3，4镜片间，取消了间隔环，而改用锁码片，通过类似途径，本实用新型的优点是：有效地在保证了小型化。全部采用了玻璃镜片，对环境温 度变化不敏感，可应用于温度-10℃至85℃的环境中。基于此本实用新型可范地应用在各种智能设备中。
(四)附图说明
图1是本发明提供的小型广角镜头实施例1的结构示意图；
图2是实施例1的球差图；
图3是实施例1的场曲图；
图4是实施例1的畸变图；
图5是实施例1的光学传递函数曲线；
(五)具体实施方式
实施例1：
实施例1中，如图1所示，本发明由六片透镜构成，从物方至像方依次为第一透镜E1、第二透镜E2、第三透镜E3、光阑、第四透镜E4、第五透镜E5、第六透镜E6、滤光片E7和保护玻璃E8。从物方至像方，所述第一透镜E1的两个面分别为S1、S2；第二透镜E2的两个面分别为S3、S4；第三透镜E3的两个面分别为S5、S6；光阑面为S7；第四透镜E4和第五透镜E5胶合后的三个面为S8、S9、S10；第六透镜E6的两个面分别为S11、S12；滤光片E7的两个面分别为S13、S14；保护玻璃E8的两个面分别为S15、S16。
实施例1满足表1的条件：
表1
实施例1镜头结构参数
Figure PCTCN2015083707-appb-000001
本实施例的小型广角镜头，其球差图，场曲图，畸变图，光学传递函数图分别如图2到图5所示，由图上可以看出本发明具有较好的光学性能。
应当指出的是，虽然上面针对小型广角镜头描述了本发明的原理以及具体实施方式，但是在本发明的上述教导下，本领域技术人员可以在上述实施例的基础上进行各种改进和变形，而 这些改进或者变形均落在本发明的保护范围内。本领域技术人员应该明白，上面的具体描述只是为了解释本发明的目的，而并非用于限制本发明，本发明的保护范围由权利要求及其等同物限定。

Claims (8)

  1. 一种小型广角镜头，其特征在于，从物侧到像侧依次为：具有负焦距的第一镜片组合、光阑、具有正焦距的第二镜片组合、滤光片；第一镜片组合包括具有负光焦度的第一透镜、具有负光焦度的第二透镜和具有正光焦度的第三透镜；第二镜片组合由第四透镜、第五透镜和第六透镜组成，其中第四透镜和第五透镜胶合后具有正光焦度，第六透镜具有正光焦度。
  2. 根据权利要求1所述的小型广角镜头，其特征在于，所述镜头满足下列的条件:1.0<|D/f1|<5.0，其中D为该小型广角镜头第一球面透镜之物侧表面至成像面沿光轴方向上的距离，f1为该小型广角镜头第一镜头组合的有效焦距。
  3. 根据权利要求1所述的小型广角镜头，其特征在于，所述镜头满足下列的条件:2.0<|D/f2|<6.5，其中D为该小型广角镜头第一球面透镜之物侧表面至成像面沿光轴方向上的距离，f2为该小型广角镜头第二镜头组合的有效焦距。
  4. 根据权利要求1所述的小型广角镜头，其特征在于：所述的透镜均采用玻璃材料制成。
  5. 根据权利要求1所述的小型广角镜头，其特征在于：在第三透镜和第四透镜之间设置有光阑。
  6. 根据权利要求1所述的小型广角镜头，其特征在于：该镜头所有表面均为球面；
  7. 根据权利要求1所述的小型广角镜头，其特征在于：所述第四球面透镜包括一个第四像端表面，所述第五透镜包括一个第五物端表面，所述第四像端表面与所述第五物端表面胶合固定。
  8. 根据权利要求7所述的小型广角镜头，其特征在于：所述的第四透镜为折射率高色散玻璃，并且其阿贝数Vd<26；所述的第五透镜为低色散玻璃。
PCT/CN2015/083707 2015-05-04 2015-07-10 小型广角镜头 WO2016176911A1 (zh)

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CN107045183A (zh) * 2017-05-26 2017-08-15 东莞市宇瞳光学科技股份有限公司 一种无热化宽工作距6mp机器视觉镜头
CN107065153A (zh) * 2017-05-26 2017-08-18 东莞市宇瞳光学科技股份有限公司 一种广角高清机器视觉镜头
CN107102429A (zh) * 2017-05-26 2017-08-29 东莞市宇瞳光学科技股份有限公司 一种具有光学补偿功能的工业镜头
CN107608058A (zh) * 2017-11-08 2018-01-19 广东弘景光电科技股份有限公司 低畸变广角光学***
CN110441889A (zh) * 2019-09-12 2019-11-12 舜宇光学(中山)有限公司 一种定焦镜头
CN111158122A (zh) * 2017-03-01 2020-05-15 大立光电股份有限公司 光学影像透镜***组、取像装置及电子装置
CN111458839A (zh) * 2020-04-21 2020-07-28 中国科学院西安光学精密机械研究所 一种大视场低畸变镜头
US20200254941A1 (en) * 2018-12-12 2020-08-13 Jiangxi Lianchuang Electronic Co., Ltd. Wide-angle lens, camera module and vehicle camera
RU2762887C1 (ru) * 2018-10-16 2021-12-23 Хуавей Текнолоджиз Ко., Лтд. Оконечное устройство и способ макросъемки

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CN111158122A (zh) * 2017-03-01 2020-05-15 大立光电股份有限公司 光学影像透镜***组、取像装置及电子装置
CN111158122B (zh) * 2017-03-01 2021-12-17 大立光电股份有限公司 光学影像透镜***组、取像装置及电子装置
CN107065153B (zh) * 2017-05-26 2023-05-16 东莞市宇瞳光学科技股份有限公司 一种广角高清机器视觉镜头
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