WO2020140499A1 - 摄像光学镜头 - Google Patents
摄像光学镜头 Download PDFInfo
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- WO2020140499A1 WO2020140499A1 PCT/CN2019/108701 CN2019108701W WO2020140499A1 WO 2020140499 A1 WO2020140499 A1 WO 2020140499A1 CN 2019108701 W CN2019108701 W CN 2019108701W WO 2020140499 A1 WO2020140499 A1 WO 2020140499A1
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- 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 -
- G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only
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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
- G02B13/004—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 four lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0012—Optical design, e.g. procedures, algorithms, optimisation routines
Definitions
- the invention relates to the field of optical lenses, 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 device of general photographic lenses is nothing more than a photosensitive coupling device (Charge Coupled Device, CCD) or complementary metal oxide semiconductor device (Complementary Metal) -Oxide Semicondctor Sensor, CMOS Sensor), and due to the advancement of semiconductor manufacturing process technology, the pixel size of the photosensitive device has been reduced.
- CCD Charge Coupled Device
- CMOS Sensor complementary metal oxide semiconductor device
- today's electronic products have a trend of good function, thin and short appearance, so they have good
- the imaging quality of the miniaturized camera lens has become the mainstream on the market.
- the lens mounted on the traditional mobile phone camera mostly adopts a three-piece lens structure.
- the pixel area of the photosensitive device continues to shrink, and the system's requirements for imaging quality continue to increase.
- the four-piece lens structure gradually appears in the lens design. Common Although the four-piece lens has good optical performance, its optical power, lens spacing and lens shape settings still have certain irrationality, resulting in a lens structure that cannot meet good optical performance, large aperture, Ultra-thin design requirements.
- an object of the present invention is to provide an imaging optical lens that has good optical performance and meets the design requirements of large aperture and ultra-thinness.
- an imaging optical lens which includes, in order from the object side to the image side, an aperture, a first lens with positive refractive power, and a second lens with negative refractive power
- the lens a third lens with positive refractive power, a fourth lens with negative refractive power;
- the focal length of the fourth lens is f4
- the radius of curvature of the object side of the first lens is R1
- the radius of curvature of the mirrored side is R2
- the radius of curvature of the second lens object side is R3
- the radius of curvature of the second lens image side is R4
- the radius of curvature of the fourth lens object side is R7, which satisfies the following relationship Formula: 62.00 ⁇ R7/f4 ⁇ 70.00; 0.10 ⁇ R1/R2 ⁇ 0.40; -0.50 ⁇ R3/R4 ⁇ -0.30.
- the embodiments of the present invention use the above-mentioned lens arrangement method to use lenses with different refractive powers, and a first lens, a second lens, and a fourth lens with specific shapes to make the optical system have good optical At the same time, it meets the design requirements of large aperture, ultra-thin and thin.
- the radius of curvature of the object side of the third lens is R5
- the radius of curvature of the image side of the third lens is R6, which satisfies the following relationship: 10.00 ⁇ R5/R6 ⁇ 30.00.
- the focal length of the three lenses is f3
- the on-axis thickness of the third lens is d5, which satisfies the following relationship: 0.60 ⁇ d5/f3 ⁇ 0.68.
- FIG. 1 is a schematic structural diagram of an imaging optical lens in the first embodiment of the present invention
- FIG. 3 is a schematic diagram of chromatic aberration of magnification of the imaging optical lens shown in FIG. 1;
- FIG. 4 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 1;
- FIG. 9 is a schematic structural view of an imaging optical lens according to a third embodiment of the present invention.
- FIG. 10 is a schematic diagram of the axial aberration of the imaging optical lens shown in FIG. 9;
- 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.
- the imaging optical lens 10 includes an aperture S1, a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 in order from the object side to the image side.
- an optical element such as a glass flat plate GF is provided between the fourth lens L4 and the image plane Si.
- the glass flat plate GF may be a glass cover or an optical filter. Of course, In other possible implementation manners, the glass plate GF may also be disposed at other positions.
- the focal length of the fourth lens L4 is defined as f4, the radius of curvature of the object side of the first lens L1 is R1, and the radius of curvature of the image side is R2; the radius of curvature of the object side of the second lens L2 is R3, and the radius of curvature of the image side Is R4; the radius of curvature of the object side of the fourth lens L4 is R7.
- the f4, R1, R2, R3, R4 and R7 satisfy the following relationship:
- conditional expression (1) specifies the shape of the fourth lens L4. In this way, the aberrations generated by the three lenses (first lens L1, second lens L2, and third lens L3) in front of the optical system can be effectively corrected.
- conditional expression (4) specifies the shape of the third lens L3. When R5 and R6 are within the range specified by the conditional expression (4), it can contribute to lens processing and lens assembly.
- Conditional expression (5) specifies the size and power of the third lens L3, and when f3 and d5 are within the range specified by conditional expression (5), it contributes to lens processing and lens assembly.
- R1 radius of curvature of the object side of the first lens L1;
- R2 radius of curvature of the image side of the first lens L1;
- R3 radius of curvature of the object side of the second lens L2;
- R8 radius of curvature of the image side of the fourth lens L4;
- d the axial thickness of the lens or the axial distance between adjacent lenses
- d2 the axial distance between the image side of the first lens L1 and the object side of the second lens L2;
- nd1 refractive index of the d-line of the first lens L1;
- k is the conic coefficient
- A4, A6, A8, A10, A12, A14, A16 are aspherical coefficients.
- FIG. 5 is a schematic diagram of the structure of the imaging optical lens 20 in the second embodiment.
- the second embodiment is basically the same as the first embodiment, and the symbols have the same meaning as the first embodiment. Only the differences are listed below.
- the imaging optical lens 20 has a large aperture, is ultra-thin, and has excellent imaging performance.
- FIG. 9 is a schematic diagram of the structure of the imaging optical lens 30 in the third embodiment.
- the third embodiment is basically the same as the first embodiment, and the symbols have the same meaning as the first embodiment. Only the differences are listed below.
- Table 9 and Table 10 show the design data of 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 embodiment of the present invention.
- P2R1 1 0.785 A
- P2R2 2 0.315 0.715 P3R1 2 0.305 0.505 P3R2 2 0.695 1.145 P4R1 2 0.915 1.465 P4R2 1 0.415 A
- FIG. 10 and 11 respectively show schematic diagrams of axial aberration and magnification chromatic aberration of light having wavelengths of 486 nm, 588 nm, and 656 nm after passing through the imaging optical lens 30 of the third embodiment.
- FIG. 12 shows a schematic diagram of field curvature and distortion after the light with a wavelength of 588 nm passes through the imaging optical lens 30 of the third embodiment.
- the field curvature S in FIG. 12 is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.
- the imaging optical lens 30 has a large aperture, is ultra-thin, and has excellent imaging performance.
- Table 13 lists the numerical values corresponding to the respective conditional expressions (1), (2), (3), (4), and (5) in the first, second, and third embodiments according to the above conditional expressions , And other related parameters.
- Example 1 Example 2
- Example 3 Remarks R7/f4 65.12 68.98 62.56 Conditional (1)
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Abstract
一种摄像光学镜头(10)。该摄像光学镜头(10),由物侧至像侧依序包括:一光圈(S1),一具有正屈折力的第一透镜(L1),一具有负屈折力的第二透镜(L2),一具有正屈折力的第三透镜(L3),一具有负屈折力的第四透镜(L4);第四透镜(L4)的焦距为f4,第一透镜(L1)物侧面的曲率半径为R1,第一透镜(L1)像侧面的曲率半径为R2,第二透镜(L2)物侧面的曲率半径为R3,第二透镜(L2)像侧面的曲率半径为R4,第四透镜(L4)物侧面的曲率半径为R7,满足下列关系式:62.00<R7/f4<70.00;0.10<R1/R2<0.40;-0.50<R3/R4<-0.30。该摄像光学镜头(10)能在具有良好光学性能的同时,满足大光圈、超薄化的设计要求。
Description
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。
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-OxideSemicondctor 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。
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三片式透镜结构。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,四片式透镜结构逐渐出现在镜头设计当中,常见的四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,导致透镜结构无法满足具有良好光学性能的同时,满足大光圈、超薄化的设计要求。
发明内容
针对上述问题,本发明的目的在于提供一种摄像光学镜头,其在具有 良好光学性能的同时,满足大光圈、超薄化的设计要求。
为解决上述技术问题,本发明的实施方式提供了一种摄像光学镜头,由物侧至像侧依序包括:一光圈,一具有正屈折力的第一透镜,一具有负屈折力的第二透镜,一具有正屈折力的第三透镜,一具有负屈折力的第四透镜;所述第四透镜的焦距为f4,所述第一透镜物侧面的曲率半径为R1,所述第一透镜像侧面的曲率半径为R2,所述第二透镜物侧面的曲率半径为R3,所述第二透镜像侧面的曲率半径为R4,所述第四透镜物侧面的曲率半径为R7,满足下列关系式:62.00<R7/f4<70.00;0.10<R1/R2<0.40;-0.50<R3/R4<-0.30。
本发明实施方式相对于现有技术而言,通过上述透镜的配置方式,利用具有不同屈折力的透镜,具有特定形状的第一透镜、第二透镜和第四透镜,使光学系统在具有良好光学性能的同时,满足大光圈、超薄化、的设计要求。
另外,所述第三透镜物侧面的曲率半径为R5,所述第三透镜像侧面的曲率半径为R6,满足下列关系式:10.00<R5/R6<30.00。
另外,所述三透镜的焦距为f3,所述第三透镜的轴上厚度为d5,满足下列关系式:0.60<d5/f3<0.68。
图1是本发明第一实施方式中摄像光学镜头的结构示意图;
图2是图1所示摄像光学镜头的轴向像差示意图;
图3是图1所示摄像光学镜头的倍率色差示意图;
图4是图1所示摄像光学镜头的场曲及畸变示意图;
图5是本发明第二实施方式的摄像光学镜头的结构示意图;
图6是图5所示摄像光学镜头的轴向像差示意图;
图7是图5所示摄像光学镜头的倍率色差示意图;
图8是图5所示摄像光学镜头的场曲及畸变示意图;
图9是本发明第三实施方式的摄像光学镜头的结构示意图;
图10是图9所示摄像光学镜头的轴向像差示意图;
图11是图9所示摄像光学镜头的倍率色差示意图;
图12是图9所示摄像光学镜头的场曲及畸变示意图。
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。
以下为第一实施方式:
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:光圈S1、第一透镜L1、第二透镜L2、第三透镜L3以及第四透镜L4。本实施方式中,优选的,在第四透镜L4和像面Si之间设置有玻璃平板GF等光学元件,其中玻璃平板GF可以是玻璃盖板,也可以是光学过滤片(filter),当然在其他可实施方式中,玻璃平板GF还可以设置在其他位置。
本实施方式中,第一透镜L1具有正屈折力,其物侧面向外凸出为凸面,其像侧面为凹面;第二透镜L2具有负屈折力,其物侧面为凹面,其像侧面 为凹面;第三透镜L3具有正屈折力,其物侧面为凹面,其像侧面为凸面;第四透镜L4具有负屈折力,其物侧面为凹面,其像侧面为凹面。
此外,透镜的表面可以设置为非球面,非球面可以容易制作成球面以外的形状,获得较多的控制变数,用以消减像差,进而缩减透镜使用的数目,因此可以有效降低本发明摄像光学镜头的总长度。本发明实施例中,各个透镜的物侧面和像侧面均为非球面。
在此,定义第四透镜L4的焦距为f4,第一透镜L1的物侧面曲率半径为R1,像侧面的曲率半径为R2;第二透镜L2的物侧面曲率半径为R3,像侧面的曲率半径为R4;第四透镜L4物侧面的曲率半径为R7。所述f4、R1、R2、R3、R4及R7满足下列关系式:
62.00<R7/f4<70.00 (1)
0.10<R1/R2<0.40 (2)
-0.50<R3/R4<-0.30 (3)
其中,条件式(1)规定了第四透镜L4的形状。如此设置,可以有效校正光学系统前面三片镜片(第一透镜L1、第二透镜L2、第三透镜L3)所产生的像差。
条件式(2)规定了第一透镜L1的形状。当R1与R2在条件式(2)规定的范围内时,可以缓和光线经过镜片的偏折程度,有效减小像差。
条件式(3)规定了第二透镜L2的形状。如此设置,可以有助于消除慧差、倍率色差。
本实施方式中,通过上述透镜的配置方式,利用具有不同屈折力的各个透镜(L1、L2、L3、L4),具有特定形状的第一透镜L1、第二透镜L2以及第四透镜L4,使光学系统在具有良好光学性能的同时,满足大光圈、超薄化的设计要求。
具体的,本发明实施方式中,第三透镜L3物侧面的曲率半径为R5,第三透镜L13像侧面的曲率半径为R6,满足下列关系的关系式:
10.00<R5/R6<30.00 (4)
条件式(4)规定了第三透镜L3的形状,当R5与R6在条件式(4)规定的范围内时,可以有助于镜片的加工和镜头的组装。
优选的,本实施方式中,第三透镜L3的焦距为f3,所述第三透镜的轴上厚度为d5,f3与d5满足下列关系的关系式:
0.60<d5/f3<0.68 (5)
条件式(5)规定了第三透镜L3的尺寸和光焦度,当f3和d5在条件式(5)规定的范围内时,有助于镜片的加工和镜头的组装。
值得一提的是,由于构成本实施方式的摄像光学透镜10的第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4具有如前所述的结构和参数关系,因此,摄像光学镜头10能够合理分配各透镜的光焦度、面型、材料以及各透镜的轴上厚度等,并因此校正了各类像差,本发明中的摄像光学镜头10的光学成像系统Fno≤2.10;摄像光学镜头10的光学总长TTL,摄像光学镜头10的像高IH,满足下列关系式:TTL/IH≤1.50。实现了在具有良好光学成像性能的同时,满足大光圈、超薄化的设计要求。
图1是第一实施方式中摄像光学镜头10的结构示意图。以下示出了本发明第一实施方式中摄像光学镜头10的设计数据。表1列出了本发明第一实施方式中构成摄像光学镜头10的第一透镜L1~第四透镜L4的物侧以及像侧曲率半径R、透镜的中心厚度、透镜间的距离d、折射率nd及阿贝数vd。表2示出了摄像光学镜头10的圆锥系数k与非球面系数。需要说明的是,本实施方式中,距离、半径和中心厚度的单位为毫米(mm)。
【表1】
上表中各符号的含义如下。
R:光学面的曲率半径、透镜时为中心曲率半径;
S1:光圈;
R1:第一透镜L1的物侧面的曲率半径;
R2:第一透镜L1的像侧面的曲率半径;
R3:第二透镜L2的物侧面的曲率半径;
R4:第二透镜L2的像侧面的曲率半径;
R5:第三透镜L3的物侧面的曲率半径;
R6:第三透镜L3的像侧面的曲率半径;
R7:第四透镜L4的物侧面的曲率半径;
R8:第四透镜L4的像侧面的曲率半径;
R9:玻璃平板GF的物侧面的曲率半径;
R10:玻璃平板GF的像侧面的曲率半径;
d:透镜的轴上厚度或相邻透镜之间的轴上距离;
d0:光圈S1到第一透镜L1的物侧面的轴上距离;
d1:第一透镜L1的轴上厚度;
d2:第一透镜L1的像侧面到第二透镜L2的物侧面的轴上距离;
d3:第二透镜L2的轴上厚度;
d4:第二透镜L2的像侧面到第三透镜L3的物侧面的轴上距离;
d5:第三透镜L3的轴上厚度;
d6:第三透镜L3的像侧面到第四透镜L4的物侧面的轴上距离;
d7:第四透镜L4的轴上厚度;
d8:第四透镜L4的像侧面到光学过滤片GF的物侧面的轴上距离;
d9:玻璃平板GF的轴上厚度;
d10:玻璃平板GF的像侧面到像面Si的轴上距离;
nd:d线的折射率;
nd1:第一透镜L1的d线的折射率;
nd2:第二透镜L2的d线的折射率;
nd3:第三透镜L3的d线的折射率;
nd4:第四透镜L4的d线的折射率;
ndg:玻璃平板GF的d线的折射率;
vd:阿贝数;
v1:第一透镜L1的阿贝数;
v2:第二透镜L2的阿贝数;
v3:第三透镜L3的阿贝数;
v4:第四透镜L4的阿贝数;
vg:玻璃平板GF的阿贝数。
【表2】
其中,k是圆锥系数,A4、A6、A8、A10、A12、A14、A16是非球面系数。
需要说明的是,本实施方式中各透镜的非球面优选的使用下述条件式(6)所示的非球面,但是,下述条件式(6)的具体形式仅为一个示例,实际上,并不限于条件式(6)中表示的非球面多项式形式。
Y=(x
2/R)/{1+[1-(1+k)(x
2/R
2)]
1/2}+A
4x
4+A
6x
6+A
8x
8+A
10x
10+A
12x
12+A
14x
14+A
16x
16 (6)
表3、表4示出本发明实施例的摄像光学镜头10中各透镜的反曲点以及驻点设计数据。其中,P1R1、P2R2分别代表第一透镜L1的物侧面和像侧面,P2R1、P2R2分别代表第二透镜L2的物侧面和像侧面,P3R1、P3R2分别代表第三透镜L3的物侧面和像侧面,P4R1、P4R2分别代表第四透镜 L4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】
| 反曲点个数 | 反曲点位置1 | 反曲点位置2 | |
| P1R1 | 1 | 0.745 | |
| P1R2 | 1 | 0.415 | |
| P2R1 | 1 | 0.785 | |
| P2R2 | 2 | 0.345 | 0.725 |
| P3R1 | 2 | 0.245 | 0.505 |
| P3R2 | 2 | 0.685 | 1.165 |
| P4R1 | 2 | 0.915 | 1.445 |
| P4R2 | 1 | 0.415 |
【表4】
| 驻点个数 | 驻点位置1 | 驻点位置2 | |
| P1R1 | 0 | ||
| P1R2 | 1 | 0.595 | |
| P2R1 | 0 | ||
| P2R2 | 2 | 0.535 | 0.795 |
| P3R1 | 0 | ||
| P3R2 | 0 | ||
| P4R1 | |||
| P4R2 | 1 | 1.135 |
另外,在后续的表13中,还列出了第一实施方式中各种参数与条件式中已规定的参数所对应的值。
图2、图3分别示出了波长为486nm、588nm和656nm的光经过第一实施方式的摄像光学镜头10后的轴向像差以及倍率色差示意图。图4则示出了,波长为588nm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4的场曲S是弧矢方向的场曲,T是子午方向的场曲。
在本实施方式中,所述摄像光学镜头10的全画角为2ω,F值为Fno,其中,2ω=73.87°,Fno=2.05,如此,摄像光学镜头10具有大光圈、超薄, 且具有优秀的成像性能。
以下为第二实施方式:
图5是第二实施方式中摄像光学镜头20的结构示意图,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,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头20的设计数据。
【表5】
【表6】
表7、表8示出本发明实施例的摄像光学镜头20中各透镜的反曲点以及驻点设计数据。
【表7】
| 反曲点个数 | 反曲点位置1 | 反曲点位置2 | |
| P1R1 | 1 | 0.745 | |
| P1R2 | 1 | 0.395 | |
| P2R1 | 1 | 0.785 | |
| P2R2 | 2 | 0.365 | 0.725 |
| P3R1 | 2 | 0.205 | 0.525 |
| P3R2 | 2 | 0.675 | 1.175 |
| P4R1 | 2 | 0.915 | 1.425 |
| P4R2 | 1 | 0.405 |
【表8】
| 驻点个数 | 驻点位置1 | 驻点位置2 | |
| P1R1 | 0 | ||
| P1R2 | 1 | 0.575 | |
| P2R1 | 0 | ||
| P2R2 | 2 | 0.575 | 0.795 |
| P3R1 | 2 | 0.395 | 0.605 |
| P3R2 | 0 | ||
| P4R1 | |||
| P4R2 | 1 | 1.115 |
在后续的表13中,还列出了第二实施方式中各种参数与条件式中已规定的参数所对应的值。
图6、图7分别示出了波长为486nm、588nm和656nm的光经过第二实施方式的摄像光学镜头20后的轴向像差以及倍率色差示意图。图8则示出了波长为588nm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。图8的场曲S是弧矢方向的场曲,T是子午方向的场曲。
在本实施方式的摄像光学镜头20中,2ω=74.60°,Fno=2.05,如此,摄像光学镜头20具有大光圈、超薄,且具有优秀的成像性能。
以下为第三实施方式:
图9是第三实施方式中摄像光学镜头30的结构示意图,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,以下只列出不同点。
表9、表10示出了本发明第三实施方式的摄像光学镜头30的设计数据。
【表9】
【表10】
表11、表12示出本发明实施例的摄像光学镜头30中各透镜的反曲点以及驻点设计数据。
【表11】
| 反曲点个数 | 反曲点位置1 | 反曲点位置2 | |
| P1R1 | 1 | 0.755 | |
| P1R2 | 1 | 0.445 |
| P2R1 | 1 | 0.785 | |
| P2R2 | 2 | 0.315 | 0.715 |
| P3R1 | 2 | 0.305 | 0.505 |
| P3R2 | 2 | 0.695 | 1.145 |
| P4R1 | 2 | 0.915 | 1.465 |
| P4R2 | 1 | 0.415 |
【表12】
| 驻点个数 | 驻点位置1 | 驻点位置2 | |
| P1R1 | 0 | ||
| P1R2 | 1 | 0.635 | |
| P2R1 | 0 | ||
| P2R2 | 2 | 0.475 | 0.805 |
| P3R1 | 0 | ||
| P3R2 | 0 | ||
| P4R1 | 2 | 1.425 | 1.495 |
| P4R2 | 1 | 1.135 |
在后续的表13中,还列出了第三实施方式中各种参数与条件式中已规定的参数所对应的值。
图10、图11分别示出了波长为486nm、588nm和656nm的光经过第三实施方式的摄像光学镜头30后的轴向像差以及倍率色差示意图。图12则示出了波长为588nm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。图12的场曲S是弧矢方向的场曲,T是子午方向的场曲。
在本实施方式的摄像光学镜头30中,2ω=74.82°,Fno=2.06,如此,摄像光学镜头30具有大光圈、超薄,且具有优秀的成像性能。
以下表13按照上述条件式列出了第一实施方式、第二实施方式和第三实施方式中对应各条件式(1)、(2)、(3)、(4)、(5)的数值,以及其他相关参数的取值。
【表13】
| 实施例1 | 实施例2 | 实施例3 | 备注 | |
| R7/f4 | 65.12 | 68.98 | 62.56 | 条件式(1) |
| R1/R2 | 0.21 | 0.20 | 0.27 | 条件式(2) |
| R3/R4 | -0.33 | -0.45 | -0.40 | 条件式(3) |
| R5/R6 | 17.52 | 24.99 | 11.94 | 条件式(4) |
| d5/f3 | 0.68 | 0.65 | 0.62 | 条件式(5) |
| f | 2.942 | 2.907 | 2.89 | |
| f1 | 2.808 | 2.762 | 2.989 | |
| f2 | -6.392 | -5.792 | -8.78 | |
| f3 | 1.321 | 1.323 | 1.341 | |
| f4 | -1.186 | -1.197 | -1.207 | |
| IH | 2.285 | 2.285 | 2.285 |
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 (3)
- 一种摄像光学镜头,其特征在于,所述摄像光学镜头,由物侧至像侧依序包括:一光圈,一具有正屈折力的第一透镜,一具有负屈折力的第二透镜,一具有正屈折力的第三透镜,一具有负屈折力的第四透镜;所述第四透镜的焦距为f4,所述第一透镜物侧面的曲率半径为R1,所述第一透镜像侧面的曲率半径为R2,所述第二透镜物侧面的曲率半径为R3,所述第二透镜像侧面的曲率半径为R4,所述第四透镜物侧面的曲率半径为R7,满足下列关系式:62.00<R7/f4<70.00;0.10<R1/R2<0.40;-0.50<R3/R4<-0.30。
- 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R5,所述第三透镜像侧面的曲率半径为R6,满足下列关系式:10.00<R5/R6<30.00。
- 根据权利要求1所述的摄像光学镜头,其特征在于,所述第三透镜的焦距为f3,所述第三透镜的轴上厚度为d5,满足下列关系式:0.60<d5/f3<0.68。
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