WO2021031284A1 - 摄像光学镜头 - Google Patents

摄像光学镜头 Download PDF

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Publication number
WO2021031284A1
WO2021031284A1 PCT/CN2019/107279 CN2019107279W WO2021031284A1 WO 2021031284 A1 WO2021031284 A1 WO 2021031284A1 CN 2019107279 W CN2019107279 W CN 2019107279W WO 2021031284 A1 WO2021031284 A1 WO 2021031284A1
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Prior art keywords
lens
imaging optical
optical lens
object side
curvature
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PCT/CN2019/107279
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English (en)
French (fr)
Inventor
卞旭琪
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诚瑞光学(常州)股份有限公司
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Publication of WO2021031284A1 publication Critical patent/WO2021031284A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0035—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having three lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/12—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only

Definitions

  • the present invention relates to the field of optical lenses, and in particular to an imaging optical lens suitable for portable terminal devices such as smart phones and digital cameras, and imaging devices such as monitors and PC lenses.
  • the photosensitive devices of general photographic lenses are nothing more than photosensitive coupling devices (Charge Coupled Device, CCD) or complementary metal oxide semiconductor device (Complementary Metal-Oxide Semiconductor Sensor, CMOS Sensor), and due to the advancement of semiconductor manufacturing technology, the pixel size of photosensitive devices has been reduced, and nowadays electronic products are developing trends with good functions, light, thin and short appearance. Therefore, The miniaturized camera lens with good image quality has become the mainstream in the current market.
  • CCD Charge Coupled Device
  • CMOS Sensor complementary metal oxide semiconductor device
  • the lenses traditionally mounted on mobile phone cameras mostly adopt a two-piece lens structure.
  • the pixel area of the photosensitive device continues to shrink, and the system's requirements for image quality continue to increase, the three-element lens structure gradually appears in the lens design.
  • the three-element lens has good optical performance, its optical power, lens spacing and lens shape settings are still unreasonable, resulting in the lens structure having good optical performance, but cannot meet the requirements of large aperture, Wide-angle design requirements, and no fingerprint recognition function.
  • the object of the present invention is to provide an imaging optical lens that has good optical performance while meeting the design requirements of wide-angle, large aperture, and fingerprint recognition.
  • an embodiment of the present invention provides the imaging optical lens, which sequentially includes from the object side to the image side: a first glass plate, a first lens with negative refractive power, A second lens with positive refractive power, a third lens with positive refractive power, and an image plane;
  • the focal length of the third lens is f4, the total focal length of the imaging optical lens is f, the Abbe number of the first lens is v2, and the Abbe number of the second lens is v3;
  • the refractive index of the lens is n4, the on-axis thickness of the second lens is d5, the on-axis distance from the image side surface of the second lens to the object side surface of the third lens is d6, and the following relationship is satisfied:
  • the radius of curvature of the object side of the third lens is R7
  • the radius of curvature of the image side of the third lens is R8, and the following relationship is satisfied:
  • the curvature radius of the object side surface of the first lens is R3, and the axial thickness of the first lens is d3, and the following relationship is satisfied:
  • the focal length of the first lens is f2
  • the radius of curvature of the object side of the first lens is R3
  • the radius of curvature of the image side of the first lens is R4
  • the on-axis thickness of the first lens is d3
  • the on-axis distance from the object side of the first glass plate to the image plane is TD, and satisfies the following relationship:
  • the focal length of the second lens is f3
  • the radius of curvature of the object side of the second lens is R5
  • the radius of curvature of the image side of the second lens is R6, and the object side of the first glass plate is to the image plane
  • the on-axis distance is TD, and satisfies the following relationship:
  • the on-axis thickness of the third lens is d7, and the on-axis distance from the object side of the first glass plate to the image plane is TD, and the following relationship is satisfied:
  • the field of view of the imaging optical lens is Fov and satisfies the following relationship:
  • the Fno of the imaging optical lens satisfies the following relationship:
  • the imaging optical lens according to the present invention has good optical performance, wide-angle, large aperture, fingerprint recognition characteristics, and is especially suitable for mobile phone camera lenses composed of high-pixel CCD, CMOS and other imaging elements Components and WEB camera lens.
  • FIG. 1 is a schematic diagram of the structure of the imaging optical lens of the first embodiment
  • FIG. 2 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 1;
  • FIG. 3 is a schematic diagram of the structure of the imaging optical lens of the second embodiment
  • FIG. 4 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 3;
  • FIG. 5 is a schematic diagram of the structure of the imaging optical lens of the third embodiment.
  • FIG. 6 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 5.
  • FIG. 1 shows an imaging optical lens 10 according to a first embodiment of the present invention.
  • the imaging optical lens 10 includes four lenses. Specifically, the imaging optical lens 10 includes in order from the object side to the image side: a first glass plate G1, a first lens L1 with negative refractive power, an aperture S1, a second lens L2 with positive refractive power, The third lens L3 with positive refractive power and the image plane Si.
  • Optical elements such as an optical filter GF may be provided between the third lens L3 and the image plane Si.
  • the focal length of the third lens L3 is f4, and the total system focal length of the imaging optical lens 10 is f, and the following relationship is satisfied: 10.00 ⁇ f4/f ⁇ 31.00; the third lens L3 is specified
  • the ratio of the focal length to the total focal length of the system, through the reasonable allocation of focal length, makes the system have better imaging quality and lower sensitivity.
  • the Abbe number of the first lens L1 as v2, and the Abbe number of the second lens L2 as v3, and satisfy the following relationship: 2.80 ⁇ v3/v2 ⁇ 4.00; the second lens L2, the first lens
  • the ratio of the Abbe number of the lens L1 within this range is more conducive to the development of ultra-thinness, and is conducive to correcting aberrations.
  • the refractive index of the third lens L3 is defined as n4 and satisfies the following relationship: 1.60 ⁇ n4 ⁇ 2.10; the refractive index of the third lens L3 is specified, and the refractive index of the third lens L3 within this range is more conducive to the development of ultra-thin Correct aberrations.
  • the on-axis thickness of the second lens L2 is defined as d5, the on-axis distance from the image side surface of the second lens L2 to the object side surface of the third lens L3 is d6, and the following relationship is satisfied: 5.00 ⁇ d5/d6 ⁇ 21.00;
  • the ratio of the thickness of the second lens L2 to the on-axis distance between the second lens L2 and the third lens L3 helps to compress the total length of the optical system within the range of the conditional expression, and achieves an ultra-thinning effect.
  • the curvature radius of the object side surface of the third lens L3 as R7
  • the curvature radius of the image side surface of the third lens L3 as R8, and satisfy the following relationship: -5.00 ⁇ (R7+R8)/(R7-R8) ⁇ -1.40.
  • the shape of the third lens L3 is specified. When the condition is within this range, it is beneficial to the molding of the third lens L3 and avoids poor molding and stress generation due to excessive surface curvature.
  • the curvature radius of the object side surface of the first lens L1 is defined as R3, the on-axis thickness of the first lens L1 is d3, and the following relationship is satisfied: -12.00 ⁇ R3/d3 ⁇ -8.00.
  • the ratio of the curvature radius of the object side surface of the first lens L1 to the thickness of the first lens L1 is specified, which helps to improve the performance of the optical system within the range of the conditional expression.
  • the total focal length of the imaging optical lens 10 is defined as f, the focal length of the first lens L1 is f2, and the following relationship is satisfied: -2.54 ⁇ f2/f ⁇ -0.80.
  • the focal length of the second lens is defined as f3, the total focal length of the camera optical lens system is f, and the following relationship is satisfied: 0.51 ⁇ f3/f ⁇ 1.85; through the reasonable distribution of optical power, the system has better The imaging quality.
  • the first glass plate G1 can be used as a fingerprint recognition area of a mobile phone, a tablet, or other touch screen devices.
  • the definition of Fno of the imaging optical lens 10 satisfies the following relationship: Fno ⁇ 1.61, which is conducive to achieving a large aperture and good imaging performance; defining the field of view angle of the imaging optical lens 10 as Fov, and satisfies the following Relational formula: Fov ⁇ 120.00°, which is conducive to achieving wide angle That is, when the above relationship is satisfied, the camera optical lens 10 can not only have good optical imaging performance, but also meet the design requirements of wide-angle, large aperture, and fingerprint recognition; according to the characteristics of the optical lens 10, the optical lens 10 is particularly It is suitable for mobile phone camera lens assembly and WEB camera lens composed of high-resolution CCD, CMOS and other imaging elements.
  • the imaging optical lens 10 of the present invention will be described below with examples.
  • the symbols described in each example are as follows.
  • the unit of focal length, on-axis distance, radius of curvature, on-axis thickness, inflection point position, stagnation point position is mm.
  • TD the on-axis distance from the object side of the first glass plate G1 to the image plane Si), the unit is mm;
  • the object side and/or the image side of the lens may also be provided with inflection points and/or stagnation points to meet high-quality imaging requirements.
  • inflection points and/or stagnation points may also be provided with inflection points and/or stagnation points to meet high-quality imaging requirements.
  • Table 1 and Table 2 show design data of the imaging optical lens 10 of the first embodiment of the present invention.
  • R The radius of curvature of the optical surface, when the lens is the central radius of curvature
  • R1 the radius of curvature of the object side surface of the first glass plate G1;
  • R2 the radius of curvature of the image side surface of the first glass plate G1;
  • R3 the radius of curvature of the object side surface of the first lens L1;
  • R4 the radius of curvature of the image side surface of the first lens L1;
  • R5 the radius of curvature of the object side surface of the second lens L2;
  • R6 the radius of curvature of the image side surface of the second lens L2;
  • R7 the radius of curvature of the object side surface of the third lens L3;
  • R8 the radius of curvature of the image side surface of the third lens L3;
  • R9 the radius of curvature of the object side of the optical filter GF
  • R10 the radius of curvature of the image side surface of the optical filter GF
  • D the on-axis thickness of the lens and the on-axis distance between the lenses
  • D4 the on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;
  • D6 the on-axis distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;
  • D10 the on-axis distance from the image side surface of the optical filter GF to the image surface
  • Nd the refractive index of d-line
  • Nd1 the refractive index of the d-line of the first glass plate G1;
  • Nd2 the refractive index of the d-line of the first lens L1;
  • Nd3 the refractive index of the d-line of the second lens L2
  • Nd4 the refractive index of the d-line of the third lens L3;
  • ndg the refractive index of the d-line of the optical filter GF
  • Vd Abbe number
  • V1 Abbe number of the first glass plate G1;
  • V2 Abbe number of the first lens L1;
  • V3 Abbe number of the second lens L2;
  • V4 Abbe number of the third lens L3;
  • Vg Abbe number of optical filter GF.
  • Table 2 shows aspheric surface data of each lens in the imaging optical lens 10 of the first embodiment of the present invention.
  • k is the conic coefficient
  • A4, A6, A8, A10, A12, A14, and A16 are the aspheric coefficients.
  • the aspheric surface of each lens surface uses the aspheric surface shown in the above formula (1).
  • the present invention is not limited to the aspheric polynomial form represented by the formula (1).
  • Table 3 and Table 4 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 10 of the first embodiment of the present invention.
  • P1R1 and P1R2 represent the object side and image side of the first glass plate G1 respectively
  • P2R1 and P2R2 represent the object side and image side of the first lens L1 respectively
  • P3R1 and P3R2 represent the object side and image side of the second lens L2 respectively
  • P4R1 and P4R2 represent the object side and image side of the third lens L3, respectively.
  • the corresponding data in the “reflection point position” column is the vertical distance from the reflex point set on the surface of each lens to the optical axis of the imaging optical lens 10.
  • the data corresponding to the “stationary point position” column is the vertical distance from the stationary point set on the surface of each lens to the optical axis of the imaging optical lens 10.
  • Fig. 2 shows a schematic diagram of field curvature and distortion of light with a wavelength of 500 nm after passing through the imaging optical lens 10 of the first embodiment.
  • the field curvature S in Fig. 2 is the field curvature in the sagittal direction, and T is the field curvature in the meridian direction. song.
  • Table 13 shows the values corresponding to the various values in the first, second, and third embodiments and the parameters specified in the conditional expressions.
  • the first embodiment satisfies each conditional expression.
  • the entrance pupil diameter of the imaging optical lens is 0.249mm
  • the full-field image height is 0.675mm
  • the field of view of the imaging optical lens is 120.00°, so that the imaging optical lens 10 has a large aperture.
  • the second embodiment is basically the same as the first embodiment, and the meaning of the symbols is the same as that of the first embodiment.
  • the structure of the imaging optical lens 20 of the second embodiment is shown in FIG. 3, and only the differences are listed below.
  • Table 5 and Table 6 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.
  • Table 6 shows aspheric surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.
  • Table 7 and Table 8 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 20 of the second embodiment of the present invention.
  • FIG. 4 shows a schematic diagram of field curvature and distortion after light with a wavelength of 500 nm passes through the imaging optical lens 20 of the second embodiment.
  • the second embodiment satisfies each conditional expression.
  • the entrance pupil diameter of the imaging optical lens is 0.266mm
  • the full-field image height is 0.675mm
  • the field of view angle of the imaging optical lens is 118.20°, making the imaging optical lens 20 wide-angle .
  • Large aperture, fingerprint recognition, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.
  • the third embodiment is basically the same as the first embodiment, and the meaning of the symbols is the same as that of the first embodiment.
  • the structure of the imaging optical lens 30 of the third embodiment is shown in FIG. 5, and only the differences are listed below.
  • Table 9 and Table 10 show design data of the imaging optical lens 30 of the third embodiment of the present invention.
  • Table 10 shows the aspheric surface data of each lens in the imaging optical lens 30 of the third embodiment of the present invention.
  • Table 11 and Table 12 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 30 of the third embodiment of the present invention.
  • FIG. 6 shows a schematic diagram of field curvature and distortion after light with a wavelength of 500 nm passes through the imaging optical lens 30 of the third embodiment.
  • the entrance pupil diameter of the imaging optical lens is 0.282 mm
  • the full-field image height is 0.675 mm
  • the field of view angle of the imaging optical lens is 118.20°, which makes the imaging optical lens 30 wide-angle .
  • Large aperture, fingerprint recognition, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

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

一种摄像光学镜头(10)，自物侧至像侧依序包含：第一玻璃平板(G1)，具有负屈折力的第一透镜(L1)，具有正屈折力的第二透镜(L2)，以及具有正屈折力的第三透镜(L3)；第三透镜(L3)的焦距为f4，摄像光学镜头(10)的系统总焦距为f，第一透镜(L1)的阿贝数为v2，第二透镜(L2)的阿贝数为v3，第三透镜(L3)的折射率为n4，第二透镜(L2)的轴上厚度为d5，第二透镜(L2)像侧面到第三透镜(L3)物侧面的轴上距离为d6，且满足下列关系式：10.00＜f4/f＜31.00；2.80＜v3/v2＜4.00；1.60＜n4＜2.10；5.00＜d5/d6＜21.00，这种摄像光学镜头具有良好光学性能，同时满足广角化、大光圈和指纹识别的设计要求。

Description

摄像光学镜头 技术领域
本发明涉及光学镜头领域，特别涉及一种适用于智能手机、数码相机等手提终端设备，以及监视器、PC镜头等摄像装置的摄像光学镜头。
 背景技术
近年来，随着智能手机的兴起，小型化摄影镜头的需求日渐提高，而一般摄影镜头的感光器件不外乎是感光耦合器件（Charge Coupled Device，CCD）或互补性氧化金属半导体器件（Complementary Metal-Oxide Semiconductor Sensor，CMOS Sensor）两种，且由于半导体制造工艺技术的精进，使得感光器件的像素尺寸缩小，再加上现今电子产品以功能佳且轻薄短小的外型为发展趋势，因此，具备良好成像品质的小型化摄像镜头俨然成为目前市场上的主流。
 技术问题
为获得较佳的成像品质，传统搭载于手机相机的镜头多采用两片式透镜结构。然而，随着技术的发展以及用户多样化需求的增多，在感光器件的像素面积不断缩小，且系统对成像品质的要求不断提高的情况下，三片式透镜结构逐渐出现在镜头设计当中，常见的三片式透镜虽然已经具有较好的光学性能，但是其光焦度、透镜间距和透镜形状设置仍然具有一定的不合理性，导致透镜结构在具有良好光学性能的同时，无法满足大光圈、广角化设计要求，而且不具指纹识别功能。
 技术解决方案
针对上述问题，本发明的目的在于提供一种摄像光学镜头，其具有良好光学性能的同时，满足广角化、大光圈、指纹识别的设计要求。
为解决上述技术问题，本发明的实施方式提供了一种所述摄像光学镜头，所述摄像光学镜头自物侧至像侧依序包含：第一玻璃平板，具有负屈折力的第一透镜，具有正屈折力的第二透镜，具有正屈折力的第三透镜，以及像面；
所述第三透镜的焦距为f4，所述摄像光学镜头的系统总焦距为f，所述第一透镜的阿贝数为v2，所述第二透镜的阿贝数为v3；所述第三透镜的折射率为n4，所述第二透镜的轴上厚度为d5，第二透镜像侧面到第三透镜物侧面的轴上距离为d6，且满足下列关系式：
10.00<f4/f<31.00；
2.80<v3/v2<4.00；
1.60<n4<2.10；
5.00<d5/d6<21.00。
优选的，所述第三透镜物侧面的曲率半径为R7，所述第三透镜像侧面的曲率半径为R8，且满足下列关系式：
-5.00< (R7+R8)/(R7-R8) <-1.40。
优选的，所述第一透镜物侧面的曲率半径为R3，所述第一透镜的轴上厚度为d3，且满足下列关系式：
-12.00<R3/d3<-8.00。
优选的，所述第一透镜的焦距为f2，所述第一透镜物侧面的曲率半径为R3，所述第一透镜像侧面的曲率半径为R4，所述第一透镜的轴上厚度为d3，以及第一玻璃平板的物侧面到所述像面的轴上距离为TD，且满足下列关系式：
-2.54≤f2/f≤-0.80；
0.42< (R3+R4)/(R3-R4) <1.33；
0.04≤d3/TD≤0.15。
优选的，所述第二透镜的焦距为f3，所述第二透镜物侧面的曲率半径为R5，所述第二透镜像侧面的曲率半径为R6，以及第一玻璃平板的物侧面到像面的轴上距离为TD，且满足下列关系式：
0.51≤f3/f≤1.85；
0.27≤(R5+R6)/(R5-R6)≤0.89；
0.06≤d5/TD≤0.18。
优选的，所述第三透镜的轴上厚度为d7，以及第一玻璃平板的物侧面到像面的轴上距离为TD，且满足下列关系式：
0.02≤d7/TD≤0.08。
优选的，所述摄像光学镜头的视场角为Fov ，且满足下列关系式：
Fov≥120.00°。
优选的，所述摄像光学镜头的Fno，满足下列关系式：
Fno≤1.61。
 有益效果
本发明的有益效果在于: 根据本发明的摄像光学镜头具有良好光学性能，且广角化、大光圈、指纹识别的特性，尤其适用于由高像素用的CCD、CMOS等摄像元件构成的手机摄像镜头组件和WEB摄像镜头。
 附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例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发明的一些实施例，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它的附图，其中：
图1是实施方式一的摄像光学镜头的结构示意图；
图2是图1所示的摄像光学镜头的场曲及畸变示意图；
图3是实施方式二的摄像光学镜头的结构示意图；
图4是图3所示的摄像光学镜头的场曲及畸变示意图；
图5是实施方式三的摄像光学镜头的结构示意图；
图6是图5所示的摄像光学镜头的场曲及畸变示意图。
 本发明的实施方式
为使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明的各实施方式进行详细的阐述。然而，本领域的普通技术人员可以理解，在本发明各实施方式中，为了使读者更好地理解本发明而提出了许多技术细节。但是，即使没有这些技术细节和基于以下各实施方式的种种变化和修改，也可以实现本发明所要求保护的技术方案。
（第一实施方式）
请参考附图，本发明提供了一种摄像光学镜头10。图1所示为本发明第一实施方式的摄像光学镜头10，该摄像光学镜头10包括四个透镜。具体的，所述摄像光学镜头10，由物侧至像侧依序包括：第一玻璃平板G1、具有负屈折力的第一透镜L1、光圈S1、具有正屈折力的第二透镜L2、具有正屈折力的第三透镜L3以及像面Si。第三透镜L3和像面Si之间可设置有光学过滤片（filter）GF等光学元件。
在本实施方式中，所述第三透镜L3的焦距为f4，所述摄像光学镜头10的系统总焦距为f，且满足下列关系式：10.00<f4/f<31.00；规定了第三透镜L3焦距与系统总焦距的比值，通过焦距的合理分配，使得系统具有较佳的成像品质和较低的敏感性。
定义所述第一透镜L1的阿贝数为v2，所述第二透镜L2的阿贝数为v3，且满足下列关系式：2.80<v3/v2<4.00；规定了第二透镜L2、第一透镜L1的阿贝数的比值，在此范围内更有利于向超薄化发展，同时利于修正像差。
定义所述第三透镜L3的折射率为n4，且满足下列关系式：1.60<n4<2.10；规定了第三透镜L3的折射率，在此范围内更有利于向超薄化发展，同时利于修正像差。
定义所述第二透镜L2的轴上厚度为d5，第二透镜L2像侧面到第三透镜L3物侧面的轴上距离为d6，且满足下列关系式：5.00<d5/d6<21.00；规定了第二透镜L2厚度与第二透镜L2及第三透镜L3之间轴上距离的比值，在条件式范围内有助于压缩光学系统总长，实现超薄化效果。
定义所述第三透镜L3物侧面的曲率半径为R7，所述第三透镜L3像侧面的曲率半径为R8，且满足下列关系式：-5.00< (R7+R8)/(R7-R8) <-1.40。规定了第三透镜L3的形状，在此条件范围内时，有利于第三透镜L3成型，并避免因表面曲率过大而导致成型不良与应力产生。
定义所述第一透镜L1物侧面的曲率半径为R3，所述第一透镜L1的轴上厚度为d3，且满足下列关系式：-12.00<R3/d3<-8.00。规定了第一透镜L1物侧面曲率半径与第一透镜L1厚度的比值，在条件式范围内有助于提高光学系统性能。
定义所述摄像光学镜头10的系统总焦距为f，所述第一透镜L1的焦距为f2，且满足下列关系式：-2.54≤f2/f≤-0.80。通过将第一透镜L1的负光焦度控制在合理范围，有利于矫正光学系统的像差。
定义所述第一透镜物侧面的曲率半径为R3，所述第一透镜像侧面的曲率半径为R4，且满足下列关系式：0.42< (R3+R4)/(R3-R4) <1.33；规定了第一透镜L1的形状，在范围内时，随着镜头向超薄广角化发展，有利于补正轴上色像差问题。
定义所述第一透镜L1的轴上厚度为d3，以及第一玻璃平板G1的物侧面到像面Si的轴上距离为TD，且满足下列关系式：0.04≤d3/TD≤0.15，有利于实现超薄化。
定义所述第二透镜的焦距为f3，所述摄像光学镜头的系统总焦距为f，且满足下列关系式：0.51≤f3/f≤1.85；通过光焦度的合理分配，使得系统具有较佳的成像品质。
定义所述第二透镜L2物侧面的曲率半径为R5，以及所述第二透镜L2像侧面的曲率半径为R6，满足下列关系式：0.27≤(R5+R6)/(R5-R6)≤0.89，规定了第二透镜L2的形状，在条件式范围内，可以缓和光线经过镜片的偏折程度，有效减小像差。
定义所述第二透镜L2的轴上厚度为d5，以及第一玻璃平板G1的物侧面到像面Si的轴上距离为TD，且满足下列关系式：0.06≤d5/TD≤0.18，有利于实现超薄化。
定义所述第三透镜L3的轴上厚度为d7，以及第一玻璃平板G1的物侧面到像面Si的轴上距离为TD，且满足下列关系式：0.02≤d7/TD≤0.08，有利于实现超薄化。
定义所述第一玻璃平板G1的焦距为f1，满足下列关系式f1=∞。在不同的实施方式中，第一玻璃平板G1可以作为手机、平板或其他触屏设备的指纹识别区。
进一步的，定义所述摄像光学镜头10的Fno，满足下列关系式：Fno≤1.61，有利于实现大光圈，使得成像性能好；定义所述摄像光学镜头10的视场角为Fov ，且满足下列关系式：Fov≥120.00°，有利于实现广角化。即当满足上述关系，使得摄像光学镜头10实现了在具有良好光学成像性能的同时，还能满足广角化、大光圈、指纹识别的设计要求；根据该光学镜头10的特性，该光学镜头10尤其适用于由高像素用的CCD、CMOS等摄像元件构成的手机摄像镜头组件和WEB摄像镜头。
下面将用实例进行说明本发明的摄像光学镜头10。各实例中所记载的符号如下所示。焦距、轴上距离、曲率半径、轴上厚度、反曲点位置、驻点位置的单位为mm。
TD：第一玻璃平板G1的物侧面到像面Si的轴上距离)，单位为mm；
优选的，所述透镜的物侧面和/或像侧面上还可以设置有反曲点和/或驻点，以满足高品质的成像需求，具体的可实施方案，参下所述。
表1、表2示出本发明第一实施方式的摄像光学镜头10的设计数据。
【表1】
Figure 429274dest_path_image001
其中，各符号的含义如下。
 S1： 光圈；
 R：  光学面的曲率半径、透镜时为中心曲率半径；
 R1： 第一玻璃平板G1的物侧面的曲率半径；
 R2： 第一玻璃平板G1的像侧面的曲率半径；
 R3： 第一透镜L1的物侧面的曲率半径；
 R4： 第一透镜L1的像侧面的曲率半径；
 R5： 第二透镜L2的物侧面的曲率半径；
 R6： 第二透镜L2的像侧面的曲率半径；
 R7： 第三透镜L3的物侧面的曲率半径；
 R8： 第三透镜L3的像侧面的曲率半径；
 R9：光学过滤片GF的物侧面的曲率半径；
 R10：光学过滤片GF的像侧面的曲率半径；
 d ： 透镜的轴上厚度与透镜之间的轴上距离；
 d0： 光圈S1到第一玻璃平板G1的物侧面的轴上距离；
 d1： 第一玻璃平板G1的轴上厚度；
 d2： 第一玻璃平板G1的像侧面到第一透镜L1的物侧面的轴上距离；
 d3： 第一透镜L1的轴上厚度；
 d4： 第一透镜L1的像侧面到第二透镜L2的物侧面的轴上距离；
 d5： 第二透镜L2的轴上厚度；
 d6： 第二透镜L2的像侧面到第三透镜L3的物侧面的轴上距离；
 d7： 第三透镜L3的轴上厚度；
 d8： 第三透镜L3的像侧面到光学过滤片GF的物侧面的轴上距离；
 d9：光学过滤片GF的轴上厚度；
 d10：光学过滤片GF的像侧面到像面的轴上距离；
 nd： d线的折射率；
 nd1：第一玻璃平板G1的d线的折射率；
 nd2：第一透镜L1的d线的折射率；
 nd3：第二透镜L2的d线的折射率；
 nd4：第三透镜L3的d线的折射率；
ndg：光学过滤片GF的d线的折射率；
 vd：阿贝数；
 v1：第一玻璃平板G1的阿贝数；
 v2：第一透镜L1的阿贝数；
 v3：第二透镜L2的阿贝数；
 v4：第三透镜L3的阿贝数；
 vg：光学过滤片GF的阿贝数。
表2示出本发明第一实施方式的摄像光学镜头10中各透镜的非球面数据。
【表2】
Figure 234681dest_path_image002
其中，k是圆锥系数，A4、A6、A8、A10、A12、A14、A16是非球面系数。
y=(x 2/R)/[1+{1-(k+1)(x 2/R 2)} 1/2]+A4x 4+A6x 6+A8x 8+A10x 10+A12x 12+A14x 14+A16x 16                                    （1）
为方便起见，各个透镜面的非球面使用上述公式（1）中所示的非球面。但是，本发明不限于该公式（1）表示的非球面多项式形式。
表3、表4示出本发明第一实施方式的摄像光学镜头10中各透镜的反曲点以及驻点设计数据。其中，P1R1、P1R2分别代表第一玻璃平板G1的物侧面和像侧面， P2R1、P2R2分别代表第一透镜L1的物侧面和像侧面，P3R1、P3R2分别代表第二透镜L2的物侧面和像侧面，P4R1、P4R2分别代表第三透镜L3的物侧面和像侧面。“反曲点位置”栏位对应数据为各透镜表面所设置的反曲点到摄像光学镜头10光轴的垂直距离。“驻点位置”栏位对应数据为各透镜表面所设置的驻点到摄像光学镜头10光轴的垂直距离。
【表3】
Figure 634439dest_path_image003
【表4】
Figure 340226dest_path_image004
图2则示出了，波长为500nm的光经过第一实施方式的摄像光学镜头10后的场曲及畸变示意图，图2的场曲S是弧矢方向的场曲，T是子午方向的场曲。
后出现的表13示出各实施方式一、二、三中各种数值与条件式中已规定的参数所对应的值。
如表13所示，第一实施方式满足各条件式。
在本实施方式中，所述摄像光学镜头的入瞳直径为0.249mm，全视场像高为0.675mm，所述摄像光学镜头的视场角为120.00°，使得所述摄像光学镜头10大光圈、广角化、指纹识别，其轴上、轴外色像差充分补正，且具有优秀的光学特征。
（第二实施方式）
第二实施方式与第一实施方式基本相同，符号含义与第一实施方式相同，该第二实施方式的摄像光学镜头20的结构形式请参图3所示，以下只列出不同点。
表5、表6示出本发明第二实施方式的摄像光学镜头20的设计数据。
【表5】
Figure 675393dest_path_image005
表6示出本发明第二实施方式的摄像光学镜头20中各透镜的非球面数据。
【表6】
Figure 971026dest_path_image006
表7、表8示出本发明第二实施方式的摄像光学镜头20中各透镜的反曲点以及驻点设计数据。
【表7】
Figure 112157dest_path_image007
【表8】
Figure 672451dest_path_image008
图4则示出了，波长为500nm的光经过第二实施方式的摄像光学镜头20后的场曲及畸变示意图。
如表13所示，第二实施方式满足各条件式。
在本实施方式中，所述摄像光学镜头的入瞳直径为0.266mm，全视场像高为0.675mm，所述摄像光学镜头的视场角为118.20°，使得所述摄像光学镜头20广角化、大光圈、指纹识别，其轴上、轴外色像差充分补正，且具有优秀的光学特征。 
（第三实施方式）
第三实施方式与第一实施方式基本相同，符号含义与第一实施方式相同，该第三实施方式的摄像光学镜头30的结构形式请参图5所示，以下只列出不同点。
表9、表10示出本发明第三实施方式的摄像光学镜头30的设计数据。
【表9】
Figure 506415dest_path_image009
表10示出本发明第三实施方式的摄像光学镜头30中各透镜的非球面数据。
【表10】
Figure 20835dest_path_image010
表11、表12示出本发明第三实施方式的摄像光学镜头30中各透镜的反曲点以及驻点设计数据。
【表11】
Figure 965658dest_path_image011
【表12】
Figure 380459dest_path_image012
图6则示出了，波长为500nm的光经过第三实施方式的摄像光学镜头30后的场曲及畸变示意图。
以下表13按照上述条件式列出了本实施方式中对应各条件式的数值。显然，本实施方式的摄像光学系统满足上述的条件式。
在本实施方式中，所述摄像光学镜头的入瞳直径为0.282mm，全视场像高为0.675mm，所述摄像光学镜头的视场角为118.20°，使得所述摄像光学镜头30广角化、大光圈、指纹识别，其轴上、轴外色像差充分补正，且具有优秀的光学特征。
【表13】
Figure 385324dest_path_image013
本领域的普通技术人员可以理解，上述各实施方式是实现本发明的具体实施方式，而在实际应用中，可以在形式上和细节上对其作各种改变，而不偏离本发明的精神和范围。

Claims (8)

  1. 一种摄像光学镜头，其特征在于，所述摄像光学镜头自物侧至像侧依序包含：第一玻璃平板，具有负屈折力的第一透镜，具有正屈折力的第二透镜，具有正屈折力的第三透镜，以及像面；
    所述第三透镜的焦距为f4，所述摄像光学镜头的系统总焦距为f，所述第一透镜的阿贝数为v2，所述第二透镜的阿贝数为v3，所述第三透镜的折射率为n4，所述第二透镜的轴上厚度为d5，第二透镜像侧面到第三透镜物侧面的轴上距离为d6，且满足下列关系式：
    10.00<f4/f<31.00；
    2.80<v3/v2<4.00；
    1.60<n4<2.10；
    5.00<d5/d6<21.00。
  2. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第三透镜物侧面的曲率半径为R7，所述第三透镜像侧面的曲率半径为R8，且满足下列关系式：
    -5.00< (R7+R8)/(R7-R8) <-1.40。
  3. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第一透镜物侧面的曲率半径为R3，所述第一透镜的轴上厚度为d3，且满足下列关系式：
    -12.00<R3/d3<-8.00。
  4. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第一透镜的焦距为f2，所述第一透镜物侧面的曲率半径为R3，所述第一透镜像侧面的曲率半径为R4，所述第一透镜的轴上厚度为d3，以及第一玻璃平板的物侧面到所述像面的轴上距离为TD，且满足下列关系式：
    -2.54≤f2/f≤-0.80；
    0.42< (R3+R4)/(R3-R4) <1.33；
    0.04≤d3/TD≤0.15。
  5. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第二透镜的焦距为f3，所述第二透镜物侧面的曲率半径为R5，所述第二透镜像侧面的曲率半径为R6，以及第一玻璃平板的物侧面到像面的轴上距离为TD，且满足下列关系式：
    0.51≤f3/f≤1.85；
    0.27≤(R5+R6)/(R5-R6)≤0.89；
    0.06≤d5/TD≤0.18。
  6. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第三透镜的轴上厚度为d7，以及第一玻璃平板的物侧面到像面的轴上距离为TD，且满足下列关系式：
    0.02≤d7/TD≤0.08。
  7. 根据权利要求1所述的摄像光学镜头，其特征在于，所述摄像光学镜头的视场角为Fov ，且满足下列关系式：
    Fov≥120.00 。
  8. 根据权利要求1所述的摄像光学镜头，其特征在于，所述摄像光学镜头的Fno，满足下列关系式：
    Fno≤1.61。
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