CN111736324A - A wide-angle optical lens - Google Patents

A wide-angle optical lens Download PDF

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CN111736324A
CN111736324A CN202010543717.6A CN202010543717A CN111736324A CN 111736324 A CN111736324 A CN 111736324A CN 202010543717 A CN202010543717 A CN 202010543717A CN 111736324 A CN111736324 A CN 111736324A
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lens
optical
wide
less
angle optical
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骆海华
贺小军
汪子豪
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Wuhu Ruishida Optical Technology Co ltd
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Wuhu Ruishida Optical Technology Co ltd
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • G02B13/06Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00Optical elements characterised by the material of which they are made; Optical coatings for optical 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
    • G02B7/025Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue

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  • Optics & Photonics (AREA)
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Abstract

One or more embodiments of the present specification provide a wide-angle optical lens including a first lens having a negative power, a second lens having a positive power, a third lens having a positive power, and a fourth lens having a negative power, satisfying a maximum specular surface (maximage circle) of phi 7.0mm, an Effective Focal Length (EFL) of 3.23mm, a back optical focal length (BFL) of 6.05mm, a front optical focal length (FFL) of 4.44mm, a focal ratio (F/NO) of 2.46mm, a diagonal field angle (FOV-D) of 132 °, a horizontal field angle (FOV-H) of 106 °, a vertical field angle (FOV-V) of 59.6 °, which is suitable for an imaging system on automobiles, electronic products, and particularly suitable for an imaging system on automobiles, electronic products of 4K or 1080P resolution, 500 pixels.

Description

一种广角光学镜头A wide-angle optical lens

技术领域technical field

本说明书一个或多个实施例涉及光学镜头技术领域,尤其涉及一种广角光学镜头。One or more embodiments of this specification relate to the technical field of optical lenses, and in particular, to a wide-angle optical lens.

背景技术Background technique

随着科技的进步,生活水平的提高,及5G时代的应用,镜头的应用越来越广泛,人们对摄像头的需求已经不仅限于普通的拍摄效果,同时要求有更广阔的视野,且成像质量清晰、辨识度更强,尤其是对于汽车、电子产品上成像系统的光学镜头组件来说,需要一款满足EFL为3.2,BFL为6.0,FOV大于或等于110°的光学镜头,目前现有技术中尚缺少满足上述规格参数的光学镜头。With the advancement of technology, the improvement of living standards, and the application of the 5G era, the application of lenses has become more and more extensive. People's needs for cameras are not limited to ordinary shooting effects, but also require a wider field of view and clear image quality. , Stronger recognition, especially for optical lens components of imaging systems on automobiles and electronic products, an optical lens with EFL of 3.2, BFL of 6.0, and FOV greater than or equal to 110° is required. Optical lenses that meet the above specifications are still missing.

发明内容SUMMARY OF THE INVENTION

有鉴于此,本说明书一个或多个实施例的目的在于提出一种广角光学镜头,以满足EFL为3.2,BFL为6.0,FOV大于或等于110°的需求。In view of this, the purpose of one or more embodiments of this specification is to provide a wide-angle optical lens to meet the requirements of an EFL of 3.2, a BFL of 6.0, and a FOV greater than or equal to 110°.

基于上述目的,本说明书一个或多个实施例提供了一种广角光学镜头,镜头的光学系统中沿光线自前向后入射方向依次设有:具有负光焦度的第一透镜,具有正光焦度的第二透镜,具有正光焦度的第三透镜和具有负光焦度的第四透镜;Based on the above purpose, one or more embodiments of the present specification provide a wide-angle optical lens. The optical system of the lens is sequentially provided along the incident direction of light from front to back: a first lens with negative refractive power and a positive refractive power. the second lens, the third lens with positive refractive power and the fourth lens with negative refractive power;

第一透镜为双凹大面向物方,第二透镜为双凸型透镜,大面向物方,第三透镜为双凸型透镜,第四透镜为小草帽透镜;The first lens is a double-concave large lens facing the object side, the second lens is a double-convex lens, the large lens is facing the object side, the third lens is a double-convex lens, and the fourth lens is a small straw hat lens;

第一透镜与第二透镜同侧边沿的间隔为3.24mm,第二透镜与第四透镜远端边沿间的间隔为6.03mm,第三透镜和第四透镜胶合后形成具有正光焦度的胶合透镜;The distance between the same side edge of the first lens and the second lens is 3.24mm, and the distance between the second lens and the distal edge of the fourth lens is 6.03mm, and the third lens and the fourth lens are cemented to form a cemented lens with positive refractive power ;

第一透镜的d光折射率不小于1.5174,d光阿贝常数不小于52.15;The d-light refractive index of the first lens is not less than 1.5174, and the d-light Abbe constant is not less than 52.15;

第二透镜的d光折射率不小于1.8344,d光阿贝常数不小于37.21;The refractive index of d light of the second lens is not less than 1.8344, and the Abbe constant of d light is not less than 37.21;

第三透镜的d光折射率不小于1.7015,d光阿贝常数不小于41.15;The refractive index of d light of the third lens is not less than 1.7015, and the Abbe constant of d light is not less than 41.15;

第四透镜的d光折射率不小于1.9228,d光阿贝常数不小于18.90。The d-light refractive index of the fourth lens is not less than 1.9228, and the d-light Abbe constant is not less than 18.90.

优选地,第一透镜与第二透镜之间连接有固定光阑,固定光阑用于将第一透镜与第二透镜同侧边沿的间隔限制在3.24mm。Preferably, a fixed diaphragm is connected between the first lens and the second lens, and the fixed diaphragm is used to limit the interval between the edges on the same side of the first lens and the second lens to 3.24 mm.

优选地,第二透镜与第三透镜之间连接有间隔环,间隔环用于将第二透镜与第四透镜远端边沿间的间隔限制在6.03mm。Preferably, a spacer ring is connected between the second lens and the third lens, and the spacer ring is used to limit the space between the second lens and the distal edge of the fourth lens to 6.03mm.

优选地,第一透镜表面镀有防水膜。Preferably, the surface of the first lens is coated with a waterproof film.

优选地,第一透镜、第二透镜、第三透镜和第四透镜均采用玻璃镜片。Preferably, the first lens, the second lens, the third lens and the fourth lens are all made of glass lenses.

优选地,镜头的光学系统中沿光线自前向后入射方向,在第四透镜之后还设有滤光片。Preferably, in the optical system of the lens, along the incident direction of light from front to back, a filter is also provided after the fourth lens.

优选地,第一透镜的材料为H-KF6,第二透镜的材料为H-ZLAF53B,第三透镜的材料为H-ZBAF20,第四透镜的材料为H-ZF72A。Preferably, the material of the first lens is H-KF6, the material of the second lens is H-ZLAF53B, the material of the third lens is H-ZBAF20, and the material of the fourth lens is H-ZF72A.

从上面所述可以看出,本说明书一个或多个实施例提供的广角光学镜头,满足最大镜面(Maximagecircle)为φ7.0mm,有效焦距(EFL)为3.23mm,光学后焦距(BFL)为6.05mm,光学前焦距(FFL)为4.44mm,焦比(F/NO)为2.46mm,其对角线视场角(FOV-D)为132°,水平视场角(FOV-H)为106°,垂直视场角(FOV-V)为59.6°,该广角光学镜头,适用于汽车、电子产品上的成像系统,尤其适用于4K或1080P分辨率,500万像素的汽车、电子产品上的成像系统。It can be seen from the above that the wide-angle optical lens provided by one or more embodiments of this specification satisfies that the maximum mirror surface (Maximagecircle) is φ7.0mm, the effective focal length (EFL) is 3.23mm, and the optical back focal length (BFL) is 6.05mm mm, the optical front focal length (FFL) is 4.44mm, the focal ratio (F/NO) is 2.46mm, the diagonal field of view (FOV-D) is 132°, and the horizontal field of view (FOV-H) is 106 °, the vertical field of view (FOV-V) is 59.6°, this wide-angle optical lens is suitable for imaging systems on automobiles and electronic products, especially suitable for 4K or 1080P resolution, 5 million pixels on automobiles and electronic products. imaging system.

附图说明Description of drawings

为了更清楚地说明本说明书一个或多个实施例或现有技术中的技术方案,下面将对实施例或现有技术描述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说明书一个或多个实施例,对于本领域普通技术人员来讲,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。In order to more clearly illustrate one or more embodiments of the present specification or the technical solutions in the prior art, the following briefly introduces the accompanying drawings used in the description of the embodiments or the prior art. Obviously, in the following description The accompanying drawings are only one or more embodiments of the present specification, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

图1为本说明书一个或多个实施例的光学镜头镜片组成示意图;1 is a schematic diagram of the composition of an optical lens lens according to one or more embodiments of the specification;

图2为本说明书一个或多个实施例的光学镜头光路示意图;2 is a schematic diagram of an optical path of an optical lens according to one or more embodiments of the specification;

图3为本说明书一个或多个实施例的光学镜头的镜筒内部结构示意图,其中8为像方。FIG. 3 is a schematic diagram of the internal structure of the lens barrel of the optical lens according to one or more embodiments of the specification, wherein 8 is the image side.

具体实施方式Detailed ways

为使本公开的目的、技术方案和优点更加清楚明白,以下结合具体实施例,对本公开进一步详细说明。In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below with reference to specific embodiments.

需要说明的是,除非另外定义,本说明书一个或多个实施例使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本说明书一个或多个实施例中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性,而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同,而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接,而是可以包括电性的连接,不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系,当被描述对象的绝对位置改变后,则该相对位置关系也可能相应地改变。It should be noted that, unless otherwise defined, the technical or scientific terms used in one or more embodiments of the present specification shall have the usual meanings understood by those with ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and similar terms used in one or more embodiments of this specification do not denote any order, quantity, or importance, but are merely used to distinguish the various components. "Comprises" or "comprising" and similar words mean that the elements or things appearing before the word encompass the elements or things recited after the word and their equivalents, but do not exclude other elements or things. Words like "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right", etc. are only used to represent the relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

本说明书一个或多个实施例公开了一种广角光学镜头,该镜头的光学系统中沿光线从前向后入射方向依次设有:具有负光焦度的第一透镜1、具有正光焦度的第二透镜3和具有负光焦度的第四透镜6,其中第一透镜1为双凹大面向物方,第二透镜3为双凸型透镜,大面向物方,第三透镜5为双凸型透镜,第四透镜6为小草帽透镜,第一透镜1与第二透镜3同侧边沿的间隔为3.24mm,第二透镜3与第四透镜6远端边沿间的间隔为6.03mm,第三透镜5与第四透镜6胶合后形成具有正光焦度的胶合透镜,各镜片之间的间距如图2所示。One or more embodiments of the present specification disclose a wide-angle optical lens. The optical system of the lens is sequentially provided along the incident direction of light from front to back: a first lens 1 with negative refractive power, a first lens with positive refractive power Two lenses 3 and a fourth lens 6 with negative refractive power, wherein the first lens 1 is a double-concave large lens facing the object side, the second lens 3 is a double-convex lens, the large lens is facing the object side, and the third lens 5 is a double-convex lens type lens, the fourth lens 6 is a straw hat lens, the distance between the edge of the first lens 1 and the second lens 3 on the same side is 3.24mm, the distance between the second lens 3 and the distal edge of the fourth lens 6 is 6.03mm, The three lenses 5 and the fourth lens 6 are cemented to form a cemented lens with positive refractive power, and the spacing between the lenses is shown in FIG. 2 .

第一透镜1的d光折射率不小于1.5174,d光阿贝常数不小于52.15;The refractive index of d light of the first lens 1 is not less than 1.5174, and the Abbe constant of d light is not less than 52.15;

第二透镜3的d光折射率不小于1.8344,d光阿贝常数不小于37.21;The refractive index of d light of the second lens 3 is not less than 1.8344, and the Abbe constant of d light is not less than 37.21;

第三透镜5的d光折射率不小于1.7015,d光阿贝常数不小于41.15;The refractive index of d light of the third lens 5 is not less than 1.7015, and the Abbe constant of d light is not less than 41.15;

第四透镜6的d光折射率不小于1.9228,d光阿贝常数不小于18.90。The d-light refractive index of the fourth lens 6 is not less than 1.9228, and the d-light Abbe constant is not less than 18.90.

本说明书实施例公开的广角光学镜头,其中第一透镜1的作用为开拓视场,增强光通量,该镜头满足最大镜面(Maximagecircle)为φ7.0mm,有效焦距(EFL)为3.23mm,光学后焦距(BFL)为6.05mm,光学前焦距(FFL)为4.44mm,焦比(F/NO)为2.46mm,其对角线视场角(FOV-D)为132°,水平视场角(FOV-H)为106°,垂直视场角(FOV-V)为59.6°,本说明书实施例公开的广角光学镜头,适用于汽车、电子产品上的成像系统,尤其适用于4K或1080P分辨率,500万像素的汽车、电子产品上的成像系统。In the wide-angle optical lens disclosed in the embodiments of this specification, the function of the first lens 1 is to expand the field of view and enhance the light flux. (BFL) is 6.05mm, optical front focal length (FFL) is 4.44mm, focal ratio (F/NO) is 2.46mm, its diagonal field of view (FOV-D) is 132°, horizontal field of view (FOV) -H) is 106°, and the vertical field of view (FOV-V) is 59.6°. The wide-angle optical lens disclosed in the embodiments of this specification is suitable for imaging systems on automobiles and electronic products, especially for 4K or 1080P resolution, Imaging systems on 5-megapixel automobiles and electronic products.

作为一种实施方式,第一透镜1与第二透镜3之间连接有固定光阑2,固定光阑2用于将第一透镜1与第二透镜3同侧边沿的间隔限制在3.24mm,前述固定光阑2是光学系统中对光束起着限制作用的实体,可以是透镜的边缘或框架,固定光阑2的具体规格根据镜头所装配的镜头的规格而定,固定光阑2的具体结构为本领域的常规技术手段,不在本申请的保护范围,不做赘述。As an embodiment, a fixed aperture 2 is connected between the first lens 1 and the second lens 3, and the fixed aperture 2 is used to limit the interval between the edges of the first lens 1 and the second lens 3 on the same side to 3.24 mm, The aforementioned fixed diaphragm 2 is an entity that restricts the light beam in the optical system, and can be the edge or frame of the lens. The specific specifications of the fixed diaphragm 2 are determined according to the specifications of the lens to which the lens is assembled. The structure is a conventional technical means in the field, and is not within the protection scope of the present application, and will not be described in detail.

作为一种实施方式,第二透镜3与第三透镜5之间连接有间隔环4,间隔环4用于将第二透镜3与第四透镜6远端边沿间的间隔限制在6.03mm,前述间隔环4是一种在镜头中常见的用于限制相邻镜片的距离的组件,间隔环4的具体规格根据镜头所装配的镜头的规格而定,间隔环4的具体结构为本领域的常规技术手段,不在本申请的保护范围,不做赘述。As an embodiment, a spacer ring 4 is connected between the second lens 3 and the third lens 5, and the spacer ring 4 is used to limit the distance between the second lens 3 and the fourth lens 6 at the distal edge of 6.03 mm. The aforementioned The spacer ring 4 is a common component used in lenses to limit the distance between adjacent lenses. The specific specifications of the spacer ring 4 are determined according to the specifications of the lens to which the lens is assembled. The specific structure of the spacer ring 4 is conventional in the field. The technical means are not within the scope of protection of the present application and will not be described in detail.

作为一种实施方式,第一透镜1表面镀有防水膜,举例来说,镀膜的方式包括:先在第一透镜1的片基上镀上具有有机硅的耐磨损膜,然后采用IPC的技术,用离子轰击进行镀减反射膜前的预清洗,清洗后采用高硬度的二氧化锆(Zr02)材料进行多层减反射膜层的真空镀制,最后再镀上具有110°以上接触角度的中科2RW型防水膜。通过镀有防水膜,使水、尘等脏污与透镜镜片的接触面积变小呈110°,使其不易粘附于透镜镜片表面,增加了防水、防雾、防尘、防指纹等防污染的功能,举例来说,防水膜的厚度可以是650nm或850nm。As an embodiment, the surface of the first lens 1 is coated with a waterproof film. For example, the coating method includes: firstly coating the base of the first lens 1 with a wear-resistant film with silicone, and then using IPC technology, using ion bombardment for pre-cleaning before anti-reflection coating, using high-hardness zirconium dioxide (Zr02) material for vacuum plating of multi-layer anti-reflection coating after cleaning, and finally coating with a contact angle of more than 110° The Zhongke 2RW type waterproof membrane. By being coated with a waterproof film, the contact area between water, dust and other contaminants and the lens lens is reduced to 110°, making it difficult to adhere to the surface of the lens lens, increasing waterproof, anti-fog, dust-proof, anti-fingerprint and other anti-pollution For example, the thickness of the waterproof membrane can be 650nm or 850nm.

作为一种实施方式,第一透镜1、第二透镜3、第三透镜5和第四透镜6均采用玻璃镜片,避免塑胶镜片容易受温度影响导致成像质量下降、容易老化的缺点。As an embodiment, the first lens 1 , the second lens 3 , the third lens 5 and the fourth lens 6 all use glass lenses, so as to avoid the disadvantages of the plastic lenses being easily affected by temperature, resulting in degraded image quality and easy aging.

作为一种实施方式,本光学镜头的光学系统中沿光线自前向后入射方向,在第四透镜6之后还设有滤光片7。As an embodiment, in the optical system of the optical lens, a filter 7 is further provided after the fourth lens 6 along the incident direction of light from front to back.

作为一种实施方式,在第一透镜1、第二透镜3、第三透镜5、第四透镜6及滤光片7外,安装有镜筒,即以上透镜及滤光片7均安装在镜筒内,与镜筒装配后,第一透镜前端面距离像方长为15.29mm,举例来说,镜筒的螺纹固件尺寸可设置为M12*0.5P。As an embodiment, a lens barrel is installed outside the first lens 1 , the second lens 3 , the third lens 5 , the fourth lens 6 and the filter 7 , that is, the above lenses and the filter 7 are all installed in the lens Inside the barrel, after being assembled with the lens barrel, the distance from the front surface of the first lens to the image is 15.29mm. For example, the size of the threaded fastener of the lens barrel can be set to M12*0.5P.

作为一种实施方式,镜筒外直径为14mm,第一透镜外直径为9mm,固定光阑、第二透镜、间隔环、第三透镜和第四透镜的外直径均为6mm,镜筒长度为11.41mm。As an embodiment, the outer diameter of the lens barrel is 14 mm, the outer diameter of the first lens is 9 mm, the outer diameters of the fixed diaphragm, the second lens, the spacer ring, the third lens and the fourth lens are all 6 mm, and the length of the lens barrel is 11.41mm.

作为一种实施方式,第一透镜1的材料为H-KF6,第二透镜3的材料为H-ZLAF53B,第三透镜5的材料为H-ZBAF20,第四透镜6的材料为H-ZF72A。As an embodiment, the material of the first lens 1 is H-KF6, the material of the second lens 3 is H-ZLAF53B, the material of the third lens 5 is H-ZBAF20, and the material of the fourth lens 6 is H-ZF72A.

所属领域的普通技术人员应当理解:以上任何实施例的讨论仅为示例性的,并非旨在暗示本公开的范围(包括权利要求)被限于这些例子;在本公开的思路下,以上实施例或者不同实施例中的技术特征之间也可以进行组合,步骤可以以任意顺序实现,并存在如上所述的本说明书一个或多个实施例的不同方面的许多其它变化,为了简明它们没有在细节中提供。Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is only exemplary, and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples; under the spirit of the present disclosure, the above embodiments or Technical features in different embodiments may also be combined, steps may be implemented in any order, and there are many other variations of the different aspects of one or more embodiments of this specification as described above, which are not in detail for the sake of brevity supply.

在阐述了具体细节以描述本公开的示例性实施例的情况下,对本领域技术人员来说显而易见的是,可以在没有这些具体细节的情况下或者这些具体细节有变化的情况下实施本说明书一个或多个实施例。因此,这些描述应被认为是说明性的而不是限制性的。Where specific details are set forth to describe exemplary embodiments of the present disclosure, it will be apparent to those skilled in the art that the specification may be practiced without or with changes to these specific details or more embodiments. Accordingly, these descriptions are to be considered illustrative rather than restrictive.

本说明书一个或多个实施例旨在涵盖落入所附权利要求的宽泛范围之内的所有这样的替换、修改和变型。因此,凡在本说明书一个或多个实施例的精神和原则之内,所做的任何省略、修改、等同替换、改进等,均应包含在本公开的保护范围之内。The embodiment or embodiments of this specification are intended to cover all such alternatives, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of one or more embodiments of the present specification should be included within the protection scope of the present disclosure.

Claims (7)

1. A wide-angle optical lens is characterized in that an optical system of the lens is provided with the following components in sequence from the front to the back incidence direction: a first lens having a negative power, a second lens having a positive power, a third lens having a positive power, and a fourth lens having a negative power;
the first lens is a biconcave large-surface object space, the second lens is a biconvex lens and a large-surface object space, the third lens is a biconvex lens, and the fourth lens is a small straw hat lens;
the interval between the edges of the first lens and the second lens on the same side is 3.24mm, the interval between the edges of the second lens and the fourth lens at the far ends is 6.03mm, and the third lens and the fourth lens are cemented to form a cemented lens with positive focal power;
the d-optical refractive index of the first lens is not less than 1.5174, and the d-optical Abbe constant is not less than 52.15;
the d-optical refractive index of the second lens is not less than 1.8344, and the d-optical Abbe constant is not less than 37.21;
the d-optical refractive index of the third lens is not less than 1.7015, and the d-optical Abbe constant is not less than 41.15;
the d-optical refractive index of the fourth lens is not less than 1.9228, and the d-optical Abbe constant is not less than 18.90.
2. The wide-angle optical lens as claimed in claim 1, wherein a fixed diaphragm is connected between the first lens and the second lens, and the fixed diaphragm is used for limiting the interval between the edges of the first lens and the second lens on the same side to 3.24 mm.
3. The wide-angle optical lens of claim 1, wherein a spacer ring is coupled between the second lens and the third lens, the spacer ring configured to limit a spacing between the second lens and the distal edge of the fourth lens to 6.03 mm.
4. The wide-angle optical lens of claim 1, wherein the first lens surface is coated with a water-resistant film.
5. The wide-angle optical lens of claim 1, wherein the first lens, the second lens, the third lens and the fourth lens are all glass lenses.
6. The wide-angle optical lens as claimed in claim 1, wherein a filter is further disposed behind the fourth lens in an optical system of the lens along a direction of incidence of light from front to back.
7. The wide-angle optical lens of claim 1, wherein the material of the first lens is H-KF6, the material of the second lens is H-ZLAF53B, the material of the third lens is H-ZBAF20, and the material of the fourth lens is H-ZF 72A.
CN202010543717.6A 2020-06-15 2020-06-15 A wide-angle optical lens Pending CN111736324A (en)

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