WO2016037323A1 - 摄影物镜 - Google Patents

摄影物镜 Download PDF

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Publication number
WO2016037323A1
WO2016037323A1 PCT/CN2014/086190 CN2014086190W WO2016037323A1 WO 2016037323 A1 WO2016037323 A1 WO 2016037323A1 CN 2014086190 W CN2014086190 W CN 2014086190W WO 2016037323 A1 WO2016037323 A1 WO 2016037323A1
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WIPO (PCT)
Prior art keywords
lens
curved surface
curved face
photographic objective
distance
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PCT/CN2014/086190
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English (en)
French (fr)
Inventor
李家英
周朝明
孙博
高云峰
Original Assignee
深圳市大族激光科技股份有限公司
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Application filed by 深圳市大族激光科技股份有限公司 filed Critical 深圳市大族激光科技股份有限公司
Priority to JP2017513186A priority Critical patent/JP6404459B2/ja
Priority to PCT/CN2014/086190 priority patent/WO2016037323A1/zh
Priority to CN201480078472.7A priority patent/CN106662728B/zh
Priority to US15/328,876 priority patent/US9983390B2/en
Priority to DE112014006777.6T priority patent/DE112014006777B4/de
Publication of WO2016037323A1 publication Critical patent/WO2016037323A1/zh

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Classifications

    • 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
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/64—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having more than six components
    • 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

Definitions

  • the present invention relates to the field of applied optics, and in particular to a photographic objective lens.
  • the optical photographic objective of the bionic fisheye also known as the "fisheye" photographic objective, is a photographic objective with a large relative aperture.
  • the field of view of the photographic objective is 180o, that is, all the scenes in front of the photographic objective are taken into the field of view of the objective.
  • the object space in front of the objective lens is a hemispherical space
  • the image plane is a circular plane.
  • the optical theory of the photographic objective lens has an actual optical system distortion value of 100%, where ⁇ f, whereby the focal length f of the optical system determines that the diameter of the imaged image of the image should be 2f, such a photographic objective tends to be a volume. Larger.
  • a photographic objective lens comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens disposed coaxially along a transmission direction of the incident light, the first lens being a meniscus a lens, the second lens is a meniscus lens, the third lens is a meniscus lens, the fourth lens is a biconcave lens, the fifth lens is a biconvex lens, the sixth lens is a lenticular lens, and the seventh lens is a meniscus lens; the first lens The first curved surface and the second curved surface are included, the second lens includes a third curved surface and a fourth curved surface, the third lens includes a fifth curved surface and a sixth curved surface, the fourth lens includes a seventh curved surface and an eighth curved surface, and the fifth lens includes a first surface a nine-surface and a tenth surface, the sixth lens includes an eleventh surface and a twelfth surface, and the seventh lens includes a thirteenth surface
  • the ratio of the refractive index to the Abbe number of the first to seventh lenses is: 1.62/60, 1.62/60, 1.64/35, 1.75/30, 1.62/60, 1.62/60, 1.75/30.
  • the distance between the second curved surface and the third curved surface is 30 mm
  • the distance between the fourth curved surface and the fifth curved surface is 2 mm
  • the distance between the sixth curved surface and the seventh curved surface is 6 mm
  • the eighth curved surface and the ninth curved surface are The pitch is 2 mm
  • the distance between the tenth surface and the eleventh surface is 1 mm
  • the distance between the twelfth surface and the thirteenth surface is 1.5 mm.
  • the radius of curvature, the center thickness, the ratio of the refractive index to the Abbe number, and the pitch have a tolerance range of 5%.
  • the above photographic objective lens is composed of a total of seven lenses, has a large relative aperture, and is small in size, and greatly simplifies the variety of optical materials for manufacturing photographic objectives.
  • FIG. 1 is a schematic structural view of a photographic objective lens according to an embodiment
  • Figure 2 shows the spacing of the components of the photographic objective shown in Figure 1;
  • FIG. 3 is a beamlet aberration diagram of a photographic objective lens of an embodiment
  • FIG. 4 is a diagram showing an MTF transfer function of a photographic objective lens according to an embodiment
  • Figure 5 is a geometrical aberration diagram of a photographic objective lens of an embodiment.
  • Fig. 1 is a schematic view showing the structure of a photographic objective lens according to an embodiment, and for convenience of explanation, only parts related to the present embodiment are shown.
  • the photographic objective lens of an embodiment includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth which are coaxially disposed in the transmission direction of incident light.
  • the negative sign indicates that the light propagates from left to right, with the intersection of the spherical surface and the main optical axis as the standard, and the spherical center of the sphere is left at the point, the radius of curvature is negative, otherwise, the center of the sphere is Point to the right, the radius of curvature is positive, the same as below.
  • the first lens L1 is a meniscus lens including a first curved surface S1 and a second curved surface S2.
  • the first curved surface S1 is convex toward the object side and has a radius of curvature of 200 mm; the second curved surface S2 is also convex toward the object side, and has a radius of curvature of 15 mm.
  • the center thickness d1 of the first lens L1 i.e., the thickness of the first lens L1 on the optical axis
  • the ratio of the refractive index Nd1 of the first lens L1 to the Abbe number Vd1 is 1.62/60.
  • the outer diameter of the first lens L1 is ⁇ 60 mm.
  • the parameters of the first lens L1 described above are not uniquely selected, and each has a tolerance range of 5%, that is, each parameter is allowed to vary within ⁇ 5%.
  • the second lens L2 is a meniscus lens including a third curved surface S3 and a fourth curved surface S4.
  • the third curved surface S3 is convex toward the object side, and has a radius of curvature of 16 mm; the fourth curved surface S4 is also convex toward the object side, and has a radius of curvature of 10 mm.
  • the center thickness d3 of the second lens L2 is 2 mm.
  • the ratio of the refractive index Nd2 of the second lens L2 to the Abbe number Vd2 is 1.62/60.
  • the outer diameter of the second lens L2 is ⁇ 16 mm.
  • the tolerance of each parameter of the second lens L2 described above is 5%.
  • the third lens L3 is a meniscus lens including a fifth curved surface S5 and a sixth curved surface S6.
  • the fifth curved surface S5 is convex toward the object side, and has a radius of curvature of 17 mm; the sixth curved surface S6 is also convex toward the object side, and has a radius of curvature of 70 mm.
  • the center thickness d5 of the third lens L3 is 5 mm.
  • the ratio of the refractive index Nd3 of the third lens L3 to the Abbe number Vd3 is 1.64/35.
  • the outer diameter of the third lens L3 is ⁇ 14 mm.
  • the tolerance of each parameter of the third lens L3 described above is 5%.
  • the fourth lens L4 is a biconcave lens including a seventh curved surface S7 and an eighth curved surface S8.
  • the seventh curved surface S7 is convex toward the image side, and has a radius of curvature of -190 mm; the eighth curved surface S8 is convex toward the seventh curved surface S7, and the radius of curvature of the eighth curved surface S8 is 30 mm.
  • the ratio of the refractive index Nd4 of the fourth lens L4 to the Abbe number Vd4 is 1.75/30.
  • the center thickness d7 of the fourth lens L4 is 2 mm.
  • the outer diameter of the fourth lens L4 is ⁇ 9 mm.
  • the tolerance of each parameter of the fourth lens L4 described above is 5%.
  • the fifth lens L5 is a lenticular lens including a ninth curved surface S9 and a tenth curved surface S10.
  • the ninth curved surface S9 is convex toward the object side, and has a radius of curvature of 22 mm; the tenth curved surface S10 is convex toward the ninth curved surface S9, and the radius of curvature of the tenth curved surface S10 is -26 mm.
  • the ratio of the refractive index Nd5 of the fifth lens L5 to the Abbe number Vd5 is 1.62/60.
  • the center thickness d9 of the fifth lens L5 is 5 mm.
  • the outer diameter of the fifth lens L5 is ⁇ 12 mm, and the tolerance of each parameter of the fifth lens L5 is 5%.
  • the sixth lens L6 is a lenticular lens including an eleventh curved surface S11 and a twelfth curved surface S12.
  • the eleventh curved surface S11 is convex toward the image side, and has a radius of curvature of -60 mm;
  • the twelfth curved surface S12 is convex toward the eleventh curved surface S11, and the radius of curvature of the twelfth curved surface S12 is -15 mm.
  • the ratio of the refractive index Nd6 of the sixth lens L6 to the Abbe number Vd6 is 1.62/60.
  • the center thickness d11 of the sixth lens L6 is 5 mm.
  • the outer diameter of the sixth lens L6 is ⁇ 13 mm.
  • the tolerance of each parameter of the sixth lens L6 described above is 5%.
  • the seventh lens L7 is a meniscus lens including a thirteenth curved surface S13 and a fourteenth curved surface S14.
  • the thirteenth curved surface S13 is convex toward the image side, and has a radius of curvature of -10 mm; the fourteenth curved surface S14 is also convex toward the image side, and has a radius of curvature of -60 mm.
  • the ratio of the refractive index Nd7 of the seventh lens L7 to the Abbe number Vd7 is 1.75/30.
  • the center thickness d13 of the seventh lens L7 is 2 mm.
  • the outer diameter of the seventh lens L7 is ⁇ 14 mm.
  • the tolerance of each parameter of the seventh lens L7 described above is 5%.
  • the first curved surface S1 to the fourteenth curved surface S14 are sequentially arranged along the transmission direction of the incident light.
  • the distance d2 between the exit surface of the first lens L1 (the second curved surface S2) and the incident surface of the second lens L2 (the third curved surface S3) on the optical axis is 30 mm, and the tolerance of the spacing d2 is 5 %.
  • the distance d4 between the exit surface of the second lens L2 (fourth curved surface S4) and the incident surface of the third lens L3 (the fifth curved surface S5) on the optical axis is 2 mm, and the tolerance of the pitch d4 is 5%.
  • the distance d6 between the exit surface of the third lens L3 (the sixth curved surface S6) and the incident surface of the fourth lens L4 (the seventh curved surface S7) on the optical axis is 6 mm, and the tolerance of the pitch d6 is 5%.
  • the distance d8 between the exit surface of the fourth lens L4 (eighth curved surface S8) and the incident surface of the fifth lens L5 (ninth curved surface S9) on the optical axis is 2 mm, and the tolerance of the pitch d8 is 5%.
  • the distance d10 between the exit surface of the fifth lens L5 (the tenth curved surface S10) and the incident surface of the sixth lens L6 (the eleventh curved surface S11) on the optical axis is 1 mm, and the tolerance of the pitch d10 is 5%.
  • the distance d12 between the exit surface of the sixth lens L6 (the twelfth curved surface S12) and the incident surface of the seventh lens L7 (the thirteenth curved surface S13) on the optical axis is 1.5 mm, and the tolerance of the pitch d12 is 5%.
  • 3-5 show the beamlet aberration diagram, the modulation transfer function graph, and the geometric aberration diagram of the above photographic objective lens, respectively.
  • the photographic objective has the following parameters:
  • the distortion of the photographic objective lens is completely consistent with the theory.
  • the diffuse circle of the full field of view is about 0.01 mm, which has reached the desired value.
  • the above photographic objective lens is composed of a total of seven lenses, has a large relative aperture, and is small in volume.

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

Abstract

一种摄影物镜，包括七片透镜，其中第一透镜为弯月透镜；第二透镜为弯月透镜；第三透镜为弯月透镜；第四透镜为双凹透镜；第五透镜为双凸透镜；第六透镜为双凸透镜；第七透镜为弯月透镜。第一透镜包括第一曲面和第二曲面，第二透镜包括第三曲面和第四曲面，第三透镜包括第五曲面和第六曲面，第四透镜包括第七曲面和第八曲面，第五透镜包括第九曲面和第十曲面，第六透镜包括第十一曲面和第十二曲面，第七透镜包括第十三曲面和第十四曲面，第一曲面至第十四曲面沿入射光线的传输方向依次排布。

Description

摄影物镜
【技术领域】
本发明涉及应用光学领域，特别涉及一种摄影物镜。
【背景技术】
仿生鱼眼的光学摄影物镜，又称为“鱼眼”摄影物镜，是一种大相对孔径的摄影物镜。从光学理论上讲，该摄影物镜的视场为180º，即在摄影物镜前面的所有景物都会被摄入物镜的视场内。
假设在摄影物镜前半球的景物全部都会被摄入并在像面上成像，由此可推论，物镜前的物空间是一个半球形的空间，而像面则为一个圆形的平面，此时几何光学中的公式η=ftgα已不再适用，因为当tgα中的α为90º时，tgα→∞，即η→∞，这在实际中是不可能的。这时，摄影物镜的光学理论实际的光学系统畸变值为100%，在这里η≈f，由此光学系统的焦距f就决定了成像物面图像的直径应为2f，这样的摄影物镜往往体积较大。
【发明内容】
基于此，有必要提供一种具有大相对孔径，且体积较小的摄影物镜。
一种摄影物镜，包括沿入射光线的传输方向共轴设置的第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜和第七透镜，第一透镜为弯月透镜，第二透镜为弯月透镜，第三透镜为弯月透镜，第四透镜为双凹透镜，第五透镜为双凸透镜，第六透镜为双凸透镜，第七透镜为弯月透镜；第一透镜包括第一曲面和第二曲面，第二透镜包括第三曲面和第四曲面，第三透镜包括第五曲面和第六曲面，第四透镜包括第七曲面和第八曲面，第五透镜包括第九曲面和第十曲面，第六透镜包括第十一曲面和第十二曲面，第七透镜包括第十三曲面和第十四曲面；第一曲面至第十四曲面沿入射光线的传输方向依次排布；第一曲面至所述第十四曲面的曲率半径依次为：200mm，15mm，16mm，10mm，17mm，70mm，-190mm，30mm，22mm，-26mm，-60mm，-15mm，-10mm，-60mm；第一透镜至所述第七透镜的中心厚度依次为：4mm，2mm，5mm，2mm，5mm，5mm，2mm。
在其中一个实施例中，第一透镜至第七透镜的折射率与阿贝数的比例依次为：1.62/60，1.62/60，1.64/35，1.75/30，1.62/60，1.62/60，1.75/30。
在其中一个实施例中，第二曲面与第三曲面的间距为30mm，第四曲面与第五曲面的间距为2mm，第六曲面与第七曲面的间距为6mm，第八曲面与第九曲面的间距为2mm，第十曲面与第十一曲面的间距为1mm，第十二曲面与第十三曲面的间距为1.5mm。
在其中一个实施例中，曲率半径、中心厚度、折射率与阿贝数的比例以及间距的公差范围均为5%。
上述摄影物镜共由七片透镜组成，具有大相对孔径，且体积较小，同时极大地简化了制造摄影物镜的光学材料的品种。
【附图说明】
通过附图中所示的本发明的优选实施例的更具体说明，本发明的上述及其它目的、特征和优势将会变得更加清晰。在全部附图中相同的附图标记指示相同的部分，且并未刻意按实际尺寸等比例缩放绘制附图，重点在于示出本发明的主旨。
图1为一实施例的摄影物镜的结构示意图；
图2显示了图1所示的摄影物镜的各部件的间距；
图3为一实施例的摄影物镜的细光束象差图；
图4为一实施例的摄影物镜的MTF传递函数图；
图5为一实施例的摄影物镜的几何象差图。
【具体实施方式】
为使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图对本发明的具体实施方式做详细的说明。在下面的描述中阐述了很多具体细节以便于充分理解本发明。但是本发明能够以很多不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本发明内涵的情况下做类似改进，因此本发明不受下面公开的具体实施的限制。
图1为一实施例的摄影物镜的结构示意图，为了便于说明，仅示出了与本实施例相关的部分。
如图1所示，一实施例的摄影物镜包括沿入射光线的传输方向共轴设置的第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5、第六透镜L6和第七透镜L7。
在该摄影物镜中，负号表示光从左向右传播，以球面和主光轴的交点为准，球面的球心在该点以左，则曲率半径为负，反之，球心在在该点以右，则曲率半径为正，以下同理。
如图1和图2所示，第一透镜L1为弯月透镜，其包括第一曲面S1和第二曲面S2。第一曲面S1向物方凸出，其曲率半径为200mm；第二曲面S2也向物方凸出，其曲率半径为15mm。第一透镜L1的中心厚度d1（即第一透镜L1在光轴上的厚度）为4mm。第一透镜L1的折射率Nd1与阿贝数Vd1的比例为1.62/60。第一透镜L1的外径为Φ60mm。上述第一透镜L1的各参数并非唯一选择，均存在5%的公差范围，即允许各参数在±5%范围内变化。
第二透镜L2为弯月透镜，其包括第三曲面S3和第四曲面S4。第三曲面S3向物方凸出，其曲率半径为16mm；第四曲面S4也向物方凸出，其曲率半径为10mm。第二透镜L2的中心厚度d3为2mm。第二透镜L2的折射率Nd2与阿贝数Vd2的比例为1.62/60。第二透镜L2的外径为Φ16mm。上述第二透镜L2的各参数的公差范围为5%。
第三透镜L3为弯月透镜，其包括第五曲面S5和第六曲面S6。第五曲面S5向物方凸出，其曲率半径为17mm；第六曲面S6也向物方凸出，其曲率半径为70mm。第三透镜L3的中心厚度d5为5mm。第三透镜L3的折射率Nd3与阿贝数Vd3的比例为1.64/35。第三透镜L3的外径为Φ14mm。上述第三透镜L3的各参数的公差范围为5%。
第四透镜L4为双凹透镜，其包括第七曲面S7和第八曲面S8。第七曲面S7向像方凸出，其曲率半径为-190mm；第八曲面S8朝向第七曲面S7凸出，第八曲面S8的曲率半径为30mm。第四透镜L4的折射率Nd4与阿贝数Vd4的比例为1.75/30。第四透镜L4中心厚度d7为2mm。第四透镜L4的外径为Φ9mm。上述第四透镜L4的各参数的公差范围为5%。
第五透镜L5为双凸透镜，其包括第九曲面S9和第十曲面S10。第九曲面S9向物方凸出，其曲率半径为22mm；第十曲面S10背向第九曲面S9凸出，第十曲面S10的曲率半径为-26mm。第五透镜L5的折射率Nd5与阿贝数Vd5的比例为1.62/60。第五透镜L5中心厚度d9为5mm。第五透镜L5的外径为Φ12mm，上述第五透镜L5的各参数的公差范围为5%。
第六透镜L6为双凸透镜，其包括第十一曲面S11和第十二曲面S12。第十一曲面S11向像方凸出，其曲率半径为-60mm；第十二曲面S12背向第十一曲面S11凸出，第十二曲面S12的曲率半径为-15mm。第六透镜L6的折射率Nd6与阿贝数Vd6的比例为1.62/60。第六透镜L6的中心厚度d11为5mm。第六透镜L6的外径为Φ13mm。上述第六透镜L6的各参数的公差范围为5%。
第七透镜L7为弯月透镜，其包括第十三曲面S13和第十四曲面S14。第十三曲面S13向像方凸出，其曲率半径为-10mm；第十四曲面S14也向像方凸出，其曲率半径为-60mm。第七透镜L7的折射率Nd7与阿贝数Vd7的比例为1.75/30。第七透镜L7的中心厚度d13为2mm。第七透镜L7的外径为Φ14mm。上述第七透镜L7的各参数的公差范围为5%。
第一曲面S1至第十四曲面S14沿入射光线的传输方向依次排布。
在一个实施例中，第一透镜L1的出射面（第二曲面S2）与第二透镜L2的入射面（第三曲面S3）在光轴上的间距d2为30mm，间距d2的公差范围为5%。第二透镜L2的出射面（第四曲面S4）与第三透镜L3的入射面（第五曲面S5）在光轴上的间距d4为2mm，间距d4的公差范围为5%。第三透镜L3的出射面（第六曲面S6）与第四透镜L4的入射面（第七曲面S7）在光轴上的间距d6为6mm，间距d6的公差范围为5%。第四透镜L4的出射面（第八曲面S8）与第五透镜L5的入射面（第九曲面S9）在光轴上的间距d8为2mm，间距d8的公差范围为5%。第五透镜L5的出射面（第十曲面S10）与第六透镜L6的入射面（第十一曲面S11）在光轴上的间距d10为1mm，间距d10的公差范围为5%。第六透镜L6的出射面（第十二曲面S12）与第七透镜L7的入射面（第十三曲面S13）在光轴上的间距d12为1.5mm，间距d12的公差范围为5%。
图3-5分别示出了上述摄影物镜的细光束象差图、调制传递函数曲线图及几何象差图。
该摄影物镜具有如下参数：
ƒ=14mm，2η=30，
D/ƒ=1：3.2，
2ω=180°，
λ=656nm～589nm～436nm，
L=22。
如图3A和图3B所示，该摄影物镜的畸变与理论完全一致，当视场为α=90º时，Dist=100%，其象散曲线也已达到理想状态。
如图4所示，当摄影物镜的MTF最差时，即当分辨率为20线对/mm时，MTF≈0.5。需要注意的是，由于α=90º，摄影物镜边沿的入瞳远小于摄影物镜中心的入瞳，这是由于边沿的MTF比像中心的MTF要小一些，这也是理论上存在的情况。
如图5所示，全视场的弥散圆都在0.01mm左右，已达到理想的值。
上述摄影物镜共由七片透镜组成，具有大相对孔径，且体积较小。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (4)

  1. 一种摄影物镜，其特征在于，包括沿入射光线的传输方向共轴设置的第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、第六透镜和第七透镜，所述第一透镜为弯月透镜，所述第二透镜为弯月透镜，所述第三透镜为弯月透镜，所述第四透镜为双凹透镜，所述第五透镜为双凸透镜，所述第六透镜为双凸透镜，所述第七透镜为弯月透镜；
    所述第一透镜包括第一曲面和第二曲面，所述第二透镜包括第三曲面和第四曲面，所述第三透镜包括第五曲面和第六曲面，所述第四透镜包括第七曲面和第八曲面，所述第五透镜包括第九曲面和第十曲面，所述第六透镜包括第十一曲面和第十二曲面，所述第七透镜包括第十三曲面和第十四曲面；所述第一曲面至所述第十四曲面沿入射光线的传输方向依次排布；
    所述第一曲面至所述第十四曲面的曲率半径依次为：200mm，15mm，16mm，10mm，17mm，70mm，-190mm，30mm，22mm，-26mm，-60mm，-15mm，-10mm，-60mm；
    所述第一透镜至所述第七透镜的中心厚度依次为：4mm，2mm，5mm，2mm，5mm，5mm，2mm。
  2. 根据权利要求1所述的摄影物镜，其特征在于，所述第一透镜至所述第七透镜的折射率与阿贝数的比例依次为：1.62/60，1.62/60，1.64/35，1.75/30，1.62/60，1.62/60，1.75/30。
  3. 根据权利要求1所述的摄影物镜，其特征在于，所述第二曲面与所述第三曲面的间距为30mm，所述第四曲面与所述第五曲面的间距为2mm，所述第六曲面与所述第七曲面的间距为6mm，所述第八曲面与所述第九曲面的间距为2mm，所述第十曲面与所述第十一曲面的间距为1mm，所述第十二曲面与所述第十三曲面的间距为1.5mm。
  4. 根据权利要求1-3任意一项所述的摄影物镜，其特征在于，所述曲率半径、所述中心厚度、所述折射率与阿贝数的比例以及所述间距的公差范围均为5%。
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US15/328,876 US9983390B2 (en) 2014-09-10 2014-09-10 Photographic objective lens
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