WO2019233142A1 - Objectif d'imagerie optique - Google Patents

Objectif d'imagerie optique Download PDF

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Publication number
WO2019233142A1
WO2019233142A1 PCT/CN2019/076961 CN2019076961W WO2019233142A1 WO 2019233142 A1 WO2019233142 A1 WO 2019233142A1 CN 2019076961 W CN2019076961 W CN 2019076961W WO 2019233142 A1 WO2019233142 A1 WO 2019233142A1
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Prior art keywords
lens
optical imaging
imaging lens
focal length
optical
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PCT/CN2019/076961
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English (en)
Chinese (zh)
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高雪
李明
闻人建科
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浙江舜宇光学有限公司
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Publication of WO2019233142A1 publication Critical patent/WO2019233142A1/fr

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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
    • G02B13/0045—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 application relates to an optical imaging lens, and more particularly, the present application relates to a telephoto lens including six lenses.
  • the present application provides an optical imaging lens, for example, a telephoto lens, which is applicable to portable electronic products and can at least partially solve at least one of the above disadvantages in the prior art.
  • the present application provides such an optical imaging lens, which includes, in order from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens.
  • the first lens has optical power, and its object side can be convex and the image side can be concave; the second lens can have positive power; the third lens can have negative power; the fourth lens has power; the fifth The lens may have a negative power and its image side may be concave; the sixth lens has a power.
  • the distance TTL on the optical axis from the object side of the first lens to the imaging surface of the optical imaging lens and the total effective focal length f of the optical imaging lens may satisfy TTL / f ⁇ 1.
  • the total effective focal length f of the optical imaging lens and the effective focal length f2 of the second lens may satisfy 2 ⁇ f / f2 ⁇ 3.
  • the total effective focal length f of the optical imaging lens and the effective focal length f1 of the first lens may satisfy
  • both the object side and the image side of the first lens may be spherical.
  • the curvature radius R1 of the object side of the first lens and the curvature radius R2 of the image side of the first lens may satisfy 0.5 ⁇ R1 / R2 ⁇ 1.5.
  • the total effective focal length f of the optical imaging lens and the curvature radius R3 of the object side of the second lens may satisfy 4 ⁇ f / R3 ⁇ 5.
  • the total effective focal length f of the optical imaging lens and the combined focal length f12 of the first lens and the second lens may satisfy 2 ⁇ f / f12 ⁇ 3.
  • the effective focal length f3 of the third lens and the curvature radius R6 of the image side of the third lens may satisfy -2.5 ⁇ f3 / R6 ⁇ -1.5.
  • the effective focal length f5 of the fifth lens and the curvature radius R10 of the image side of the fifth lens may satisfy -2 ⁇ f5 / R10 ⁇ -1.
  • the combined focal length f56 of the fifth lens and the sixth lens and the total effective focal length f of the optical imaging lens may satisfy -2 ⁇ f56 / f ⁇ -1.
  • the distance T45 between the fourth lens and the fifth lens on the optical axis and the center thickness CT6 of the sixth lens on the optical axis may satisfy 1 ⁇ T45 / CT6 ⁇ 2.
  • the center thickness CT2 of the second lens on the optical axis and the center thickness CT4 of the fourth lens on the optical axis may satisfy 2 ⁇ CT2 / CT4 ⁇ 3.
  • the distance T12 between the center thickness CT1 of the first lens on the optical axis and the first lens and the second lens on the optical axis may satisfy 2.3 ⁇ CT1 / T12 ⁇ 3.8.
  • a half of the diagonal length of the effective pixel area ImgH on the imaging surface of the optical imaging lens and the total effective focal length f of the optical imaging lens may satisfy ImgH / f ⁇ 0.5.
  • the optical imaging lens has a small size by reasonably distributing the power, surface shape, center thickness of each lens, and the axial distance between each lens. At least one of the beneficial effects such as high resolution, long focal length, and high imaging quality.
  • FIG. 1 is a schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application.
  • 2A to 2D respectively show the chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 1 on the axis;
  • FIG. 3 is a schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application.
  • 4A to 4D respectively show the on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 2;
  • FIG. 5 is a schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application.
  • 6A to 6D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the optical imaging lens of Example 3;
  • FIG. 7 is a schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application.
  • 8A to 8D respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens of Example 4;
  • FIG. 9 is a schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application.
  • FIGS. 10A to 10D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the optical imaging lens of Example 5;
  • FIG. 11 is a schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application.
  • 12A to 12D respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the optical imaging lens of Embodiment 6;
  • FIG. 13 is a schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application.
  • 14A to 14D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberration curves of the optical imaging lens of Example 7;
  • FIG. 15 is a schematic structural diagram of an optical imaging lens according to Embodiment 8 of the present application.
  • 16A to 16D respectively show the on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 8;
  • FIG. 17 is a schematic structural diagram of an optical imaging lens according to Embodiment 9 of the present application.
  • 18A to 18D respectively show the on-axis chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 9.
  • first, second, third, etc. are only used to distinguish one feature from another feature, and do not indicate any limitation on the feature. Therefore, without departing from the teachings of this application, a first lens discussed below may also be referred to as a second lens or a third lens.
  • the thickness, size, and shape of the lens have been slightly exaggerated.
  • the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings.
  • the drawings are only examples and are not drawn to scale.
  • the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the concave position is not defined, it means that the lens surface is at least in the paraxial area. Concave.
  • the surface of each lens near the object side is called the object side of the lens, and the surface of each lens near the image side is called the image side of the lens.
  • An optical imaging lens may include, for example, six lenses having optical power, that is, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. These six lenses are sequentially arranged along the optical axis from the object side to the image side.
  • the first lens has a positive power or a negative power, and an object side may be a convex surface, and an image side may be a concave surface; the second lens may have a positive power; and the third lens may have a negative power.
  • the fourth lens has a positive or negative power; the fifth lens may have a negative power, and its image side may be concave; the sixth lens has a positive or negative power.
  • both the object side and the image side of the first lens may be spherical.
  • the image quality of the optical system can be effectively balanced, and good processability of the optical system can be ensured.
  • the object-side surface of the second lens may be a convex surface.
  • the image side of the third lens may be concave.
  • the optical imaging lens of the present application can satisfy the conditional expression TTL / f ⁇ 1, where TTL is a distance on the optical axis from the object side of the first lens to the imaging surface of the optical imaging lens, and f is an optical The total effective focal length of the imaging lens. More specifically, TTL and f can further satisfy 0.95 ⁇ TTL / f ⁇ 1, for example, 0.96 ⁇ TTL / f ⁇ 0.98.
  • TTL and f can further satisfy 0.95 ⁇ TTL / f ⁇ 1, for example, 0.96 ⁇ TTL / f ⁇ 0.98.
  • the optical imaging lens of the present application can satisfy the conditional expression 2 ⁇ f / f2 ⁇ 3, where f is a total effective focal length of the optical imaging lens and f2 is an effective focal length of the second lens. More specifically, f and f2 can further satisfy 2 ⁇ f / f2 ⁇ 2.5, for example, 2.10 ⁇ f / f2 ⁇ 2.25. Reasonably controlling the ratio of the total effective focal length of the optical system to the effective focal length of the second lens can effectively allocate the system power and correct chromatic aberration.
  • the optical imaging lens of the present application can satisfy the conditional expression -2.5 ⁇ f3 / R6 ⁇ -1.5, where f3 is the effective focal length of the third lens and R6 is the radius of curvature of the image side of the third lens. More specifically, f3 and R6 can further satisfy -2.19 ⁇ f3 / R6 ⁇ -1.50.
  • Reasonably controlling the ratio of the effective focal length of the third lens to the curvature radius of the image side of the third lens can effectively reduce the astigmatism and distortion of the optical system.
  • the optical imaging lens of the present application may satisfy a conditional expression -2 ⁇ f5 / R10 ⁇ -1, where f5 is an effective focal length of the fifth lens and R10 is a radius of curvature of an image side of the fifth lens. More specifically, f5 and R10 can further satisfy ⁇ 1.84 ⁇ f5 / R10 ⁇ ⁇ 1.27. Reasonably controlling the ratio of the effective focal length of the fifth lens to the curvature radius of the image side of the fifth lens can effectively reduce the astigmatism and distortion of the optical system.
  • the optical imaging lens of the present application can satisfy the conditional formula ImgH / f ⁇ 0.5, where ImgH is half the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, and f is the length of the optical imaging lens. Total effective focal length. More specifically, ImgH and f can further satisfy 0.4 ⁇ ImgH / f ⁇ 0.5, for example, 0.42 ⁇ ImgH / f ⁇ 0.45. Meet the conditional expression ImgH / f ⁇ 0.5, can effectively compress the size of the optical system, and ensure the compact size characteristics of the lens.
  • the optical imaging lens of the present application can satisfy the conditional expression 0.5 ⁇ R1 / R2 ⁇ 1.5, where R1 is the curvature radius of the object side of the first lens and R2 is the curvature radius of the image side of the first lens . More specifically, R1 and R2 can further satisfy 0.7 ⁇ R1 / R2 ⁇ 1.2, for example, 0.76 ⁇ R1 / R2 ⁇ 1.09. Reasonably controlling the ratio of the curvature radius of the object side and the curvature radius of the image side of the first lens can make the optical system match the principal ray angle of the chip better.
  • the optical imaging lens of the present application can satisfy the conditional expression 4 ⁇ f / R3 ⁇ 5, where f is the total effective focal length of the optical imaging lens and R3 is the radius of curvature of the object side of the second lens. More specifically, f and R3 can further satisfy 4 ⁇ f / R3 ⁇ 4.5, for example, 4.11 ⁇ f / R3 ⁇ 4.27.
  • Reasonably controlling the ratio of the total effective focal length of the optical system to the curvature radius of the object side of the second lens can effectively reduce the system's spherical aberration and astigmatism.
  • the optical imaging lens of the present application can satisfy the conditional expression 2 ⁇ f / f12 ⁇ 3, where f is a total effective focal length of the optical imaging lens, and f12 is a combined focal length of the first lens and the second lens. More specifically, f and f12 can further satisfy 2 ⁇ f / f12 ⁇ 2.5, for example, 2.05 ⁇ f / f12 ⁇ 2.24. Reasonably distributing the ratio of the total effective focal length of the optical system to the combined focal length of the first lens and the second lens can effectively improve the sensitivity of the system.
  • the optical imaging lens of the present application can satisfy the conditional expression -2 ⁇ f56 / f ⁇ -1, where f56 is the combined focal length of the fifth lens and the sixth lens, and f is the total effective length of the optical imaging lens. focal length. More specifically, f56 and f can further satisfy ⁇ 1.79 ⁇ f56 / f ⁇ -1.31. Reasonably distributing the ratio of the combined focal length of the fifth lens and the sixth lens to the total effective focal length of the optical system is beneficial to slowing down the deflection angle of the light, reducing the sensitivity of the optical system, and improving the image quality of the optical system.
  • the optical imaging lens of the present application can satisfy the conditional expression 1 ⁇ T45 / CT6 ⁇ 2, where T45 is the distance between the fourth lens and the fifth lens on the optical axis, and CT6 is the sixth lens. Center thickness on the optical axis. More specifically, T45 and CT6 can further satisfy 1.28 ⁇ T45 / CT6 ⁇ 1.76. Satisfying conditional expression 1 ⁇ T45 / CT6 ⁇ 2, can improve the astigmatism and distortion of the optical system, and reduce the size of the rear end of the optical system.
  • the optical imaging lens of the present application can satisfy the conditional expression 2 ⁇ CT2 / CT4 ⁇ 3, where CT2 is the center thickness of the second lens on the optical axis and CT4 is the fourth lens on the optical axis. Center thickness. More specifically, CT2 and CT4 can further satisfy 2.25 ⁇ CT2 / CT4 ⁇ 2.95. Reasonably arranging the center thickness of the second lens and the fourth lens can ensure the miniaturization of the lens, reduce the deflection of the light, reduce the system sensitivity, and reduce the coma and astigmatism of the system.
  • the optical imaging lens of the present application may satisfy a conditional expression
  • Reasonably controlling the ratio of the total effective focal length of the optical system to the effective focal length of the first lens can effectively balance the chromatic aberration of the optical system.
  • the optical imaging lens of the present application can satisfy the conditional expression 2.3 ⁇ CT1 / T12 ⁇ 3.8, where CT1 is the center thickness of the first lens on the optical axis, and T12 is the first lens and the second lens at The separation distance on the optical axis. More specifically, CT1 and T12 can further satisfy 2.39 ⁇ CT1 / T12 ⁇ 3.67. Reasonably controlling the ratio of the central thickness of the first lens to the air interval of the first lens and the second lens on the optical axis can effectively reduce the front-end size of the optical system and ensure the miniaturization of the optical system.
  • the above-mentioned optical imaging lens may further include at least one diaphragm to improve the imaging quality of the lens.
  • the stop can be set at any position as needed, for example, the stop can be set between the first lens and the second lens.
  • the above-mentioned optical imaging lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element on the imaging surface.
  • This application proposes a six-piece telephoto lens that can be combined with other well-known wide-angle lenses to form a dual-lens lens, thereby achieving the purpose of zooming to obtain ideal magnification and good quality images in the case of autofocus. , Suitable for shooting distant subjects.
  • the telephoto lens of this application effectively reduces the volume of the telephoto lens and reduces the telephoto by rationally distributing the power, surface shape, center thickness of each lens, and the axial distance between the lenses.
  • the sensitivity of the lens and the improved processability of the telephoto lens make the above telephoto lens more conducive to production and processing and suitable for portable electronic products.
  • aspheric lenses are often used as lenses having optical power other than the first lens.
  • Aspheric lenses are characterized by a curvature that varies continuously from the center of the lens to the periphery of the lens.
  • an aspheric lens has better curvature radius characteristics, and has the advantages of improving distortion and astigmatic aberration.
  • the use of aspheric lenses can eliminate as much aberrations as possible during imaging, thereby improving imaging quality.
  • the number of lenses constituting the optical imaging lens may be changed to obtain various results and advantages described in this specification.
  • the optical imaging lens is not limited to including six lenses. If necessary, the optical imaging lens may further include other numbers of lenses. Specific examples of the optical imaging lens applicable to the above embodiments will be further described below with reference to the drawings.
  • FIG. 1 is a schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application.
  • an optical imaging lens includes: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a first lens
  • the four lenses E4 the fifth lens E5, the sixth lens E6, the filter E7, and the imaging surface S15.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.
  • the second lens E2 has a positive power, and the object side surface S3 is a convex surface, and the image side surface S4 is a concave surface.
  • the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a negative power, and the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a concave surface.
  • the sixth lens E6 has a positive power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a convex surface.
  • the filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.
  • Table 1 shows the surface type, the radius of curvature, the thickness, the material, and the conic coefficient of each lens of the optical imaging lens of Example 1.
  • the units of the radius of curvature and thickness are millimeters (mm).
  • each aspheric lens can be defined using, but not limited to, the following aspheric formula:
  • x is the distance vector from the vertex of the aspheric surface when the aspheric surface is at the height h along the optical axis;
  • k is the conic coefficient (given in Table 1);
  • Ai is the correction coefficient of the aspherical i-th order.
  • Table 2 below shows the higher-order coefficients A 4 , A 6 , A 8 , A 10 , A 12 , A 14 , A 16 , A 18, and A 20 that can be used for each aspherical mirror surface S3-S12 in Example 1. .
  • Table 3 shows the effective focal lengths f1 to f6 of each lens, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side S1 to the imaging surface S15 of the first lens E1 and the maximum half field of view Angular HFOV.
  • FIG. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of Example 1, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
  • FIG. 2B shows an astigmatism curve of the optical imaging lens of Example 1, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 2C shows a distortion curve of the optical imaging lens of Example 1, which represents the magnitude of the distortion at different viewing angles.
  • FIG. 2D shows the magnification chromatic aberration curve of the optical imaging lens of Example 1, which represents the deviation of different image heights on the imaging plane after the light passes through the lens. According to FIG. 2A to FIG. 2D, it can be known that the optical imaging lens provided in Embodiment 1 can achieve good imaging quality.
  • FIG. 3 is a schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application.
  • the optical imaging lens includes, in order from the object side to the image side along the optical axis, a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a first lens
  • the four lenses E4 the fifth lens E5, the sixth lens E6, the filter E7, and the imaging surface S15.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.
  • the second lens E2 has a positive power, and the object side surface S3 is a convex surface, and the image side surface S4 is a concave surface.
  • the third lens E3 has a negative power, and the object side surface S5 is a concave surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a negative power, and the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a concave surface.
  • the sixth lens E6 has a positive power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a convex surface.
  • the filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.
  • Table 4 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 2, where the units of the radius of curvature and thickness are millimeters (mm).
  • Table 5 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 2, where each aspheric surface type can be defined by the formula (1) given in the above Embodiment 1.
  • Table 6 shows the effective focal lengths f1 to f6 of each lens in Example 2, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side S1 to the imaging surface S15 of the first lens E1, and the maximum half field of view. Angular HFOV.
  • FIG. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of Embodiment 2, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
  • FIG. 4B shows an astigmatism curve of the optical imaging lens of Example 2, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 4C shows a distortion curve of the optical imaging lens of Example 2, which represents the magnitude of the distortion at different viewing angles.
  • FIG. 4D shows a magnification chromatic aberration curve of the optical imaging lens of Example 2, which represents deviations of different image heights on the imaging plane after light passes through the lens. According to FIG. 4A to FIG. 4D, it can be known that the optical imaging lens provided in Embodiment 2 can achieve good imaging quality.
  • FIG. 5 is a schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application.
  • the optical imaging lens includes, in order from the object side to the image side along the optical axis, a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a first lens
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.
  • the second lens E2 has a positive power, and the object side surface S3 is a convex surface, and the image side surface S4 is a concave surface.
  • the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a negative power, and the object side surface S7 is a concave surface, and the image side surface S8 is a concave surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a concave surface.
  • the sixth lens E6 has a positive power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a convex surface.
  • the filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.
  • Table 7 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 3.
  • the units of the radius of curvature and thickness are millimeters (mm).
  • Table 8 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 3, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • Table 9 shows the effective focal lengths f1 to f6 of the lenses in Example 3, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side S1 to the imaging surface S15 of the first lens E1, and the maximum half field of view Angular HFOV.
  • FIG. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of Embodiment 3, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
  • FIG. 6B shows an astigmatism curve of the optical imaging lens of Example 3, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 6C shows a distortion curve of the optical imaging lens of Example 3, which represents the magnitude of the distortion at different viewing angles.
  • FIG. 6D shows a magnification chromatic aberration curve of the optical imaging lens of Example 3, which represents deviations of different image heights on the imaging plane after light passes through the lens. According to FIG. 6A to FIG. 6D, it can be known that the optical imaging lens provided in Embodiment 3 can achieve good imaging quality.
  • FIG. 7 is a schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application.
  • the optical imaging lens includes: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, The four lenses E4, the fifth lens E5, the sixth lens E6, the filter E7, and the imaging surface S15.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.
  • the second lens E2 has a positive power, and the object side surface S3 is a convex surface, and the image side surface S4 is a concave surface.
  • the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a negative power, and the object side surface S7 is a concave surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a concave surface.
  • the sixth lens E6 has a positive power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a convex surface.
  • the filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.
  • Table 10 shows the surface type, the radius of curvature, the thickness, the material, and the conic coefficient of each lens of the optical imaging lens of Example 4, where the units of the radius of curvature and thickness are millimeters (mm).
  • Table 11 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 4, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • Table 12 shows the effective focal lengths f1 to f6 of the lenses in Example 4, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side S1 to the imaging surface S15 of the first lens E1, and the maximum half field of view. Angular HFOV.
  • FIG. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of Example 4, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
  • FIG. 8B shows an astigmatism curve of the optical imaging lens of Example 4, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 8C shows a distortion curve of the optical imaging lens of Example 4, which represents the magnitude of the distortion at different viewing angles.
  • FIG. 8D shows the magnification chromatic aberration curve of the optical imaging lens of Example 4, which represents the deviation of different image heights on the imaging plane after the light passes through the lens. 8A to 8D, it can be known that the optical imaging lens provided in Embodiment 4 can achieve good imaging quality.
  • FIG. 9 is a schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application.
  • the optical imaging lens includes, in order from the object side to the image side along the optical axis, a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, and a first lens.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.
  • the second lens E2 has a positive power, and the object side surface S3 is a convex surface, and the image side surface S4 is a concave surface.
  • the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a negative power, and the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a convex surface
  • the image side surface S10 is a concave surface
  • the sixth lens E6 has a positive power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a concave surface
  • the filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.
  • Table 13 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 5, where the units of the radius of curvature and thickness are millimeters (mm).
  • Table 14 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 5, where each aspheric surface type can be defined by the formula (1) given in the above Embodiment 1.
  • Table 15 shows the effective focal lengths f1 to f6 of each lens in Example 5, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the center of the object side S1 of the first lens E1 to the imaging surface S15, and the maximum half Field of View HFOV.
  • FIG. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of Example 5, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
  • FIG. 10B shows an astigmatism curve of the optical imaging lens of Example 5, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 10C illustrates a distortion curve of the optical imaging lens of Example 5, which represents the magnitude of distortion at different viewing angles.
  • FIG. 10D shows the magnification chromatic aberration curve of the optical imaging lens of Example 5, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. It can be seen from FIGS. 10A to 10D that the optical imaging lens provided in Embodiment 5 can achieve good imaging quality.
  • FIG. 11 is a schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application.
  • the optical imaging lens includes: a first lens E1, an aperture STO, a second lens E2, a third lens E3, a first lens
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.
  • the second lens E2 has a positive power, and the object side surface S3 is a convex surface, and the image side surface S4 is a concave surface.
  • the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a concave surface.
  • the sixth lens E6 has a positive power
  • the object side surface S11 is a concave surface
  • the image side surface S12 is a convex surface.
  • the filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.
  • Table 16 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 6, where the units of the radius of curvature and thickness are millimeters (mm).
  • Table 17 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 6, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • Table 18 shows the effective focal lengths f1 to f6 of each lens in Example 6, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side S1 to the imaging surface S15 of the first lens E1, and the maximum half field of view. Angular HFOV.
  • FIG. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of Embodiment 6, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
  • FIG. 12B shows an astigmatism curve of the optical imaging lens of Example 6, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 12C shows a distortion curve of the optical imaging lens of Example 6, which represents the magnitude of the distortion at different viewing angles.
  • FIG. 12D shows the magnification chromatic aberration curve of the optical imaging lens of Example 6, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. According to FIG. 12A to FIG. 12D, it can be known that the optical imaging lens provided in Embodiment 6 can achieve good imaging quality.
  • FIG. 13 is a schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application.
  • the optical imaging lens includes: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, The four lenses E4, the fifth lens E5, the sixth lens E6, the filter E7, and the imaging surface S15.
  • the first lens E1 has a positive power, and the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface.
  • the second lens E2 has a positive power, and the object side surface S3 is a convex surface, and the image side surface S4 is a convex surface.
  • the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a negative power, and the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a concave surface.
  • the sixth lens E6 has a positive power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a convex surface.
  • the filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.
  • Table 19 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 7, where the units of the radius of curvature and thickness are millimeters (mm).
  • Table 20 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 7, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • Table 21 shows the effective focal lengths f1 to f6 of the lenses in Example 7, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side S1 to the imaging surface S15 of the first lens E1, and the maximum half field of view Angular HFOV.
  • FIG. 14A shows an on-axis chromatic aberration curve of the optical imaging lens of Embodiment 7, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
  • FIG. 14B shows an astigmatism curve of the optical imaging lens of Example 7, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 14C shows a distortion curve of the optical imaging lens of Example 7, which represents the magnitude of the distortion at different viewing angles.
  • FIG. 14D shows a magnification chromatic aberration curve of the optical imaging lens of Example 7, which represents the deviation of different image heights on the imaging plane after the light passes through the lens.
  • the optical imaging lens provided in Embodiment 7 can achieve good imaging quality.
  • FIG. 15 is a schematic structural diagram of an optical imaging lens according to Embodiment 8 of the present application.
  • the optical imaging lens includes: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a first lens
  • the four lenses E4 the fifth lens E5, the sixth lens E6, the filter E7, and the imaging surface S15.
  • the first lens E1 has a negative power, and an object-side surface S1 thereof is a convex surface, and an image-side surface S2 thereof is a concave surface.
  • the second lens E2 has a positive power, and the object side surface S3 is a convex surface, and the image side surface S4 is a concave surface.
  • the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a concave surface.
  • the sixth lens E6 has a positive power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a convex surface.
  • the filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.
  • Table 22 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 8, where the units of the radius of curvature and thickness are millimeters (mm).
  • Table 23 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 8, where each aspheric surface type can be defined by the formula (1) given in the above-mentioned Embodiment 1.
  • Table 24 shows the effective focal lengths f1 to f6 of the lenses in Example 8, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side S1 to the imaging surface S15 of the first lens E1, and the maximum half field of view. Angular HFOV.
  • FIG. 16A shows an on-axis chromatic aberration curve of the optical imaging lens of Embodiment 8, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
  • FIG. 16B shows an astigmatism curve of the optical imaging lens of Example 8, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 16C shows a distortion curve of the optical imaging lens of Example 8, which represents the value of the distortion magnitude at different viewing angles.
  • FIG. 16D shows the magnification chromatic aberration curve of the optical imaging lens of Example 8, which represents the deviation of different image heights on the imaging plane after the light passes through the lens. According to FIG. 16A to FIG. 16D, it can be known that the optical imaging lens provided in Embodiment 8 can achieve good imaging quality.
  • FIG. 17 is a schematic structural diagram of an optical imaging lens according to Embodiment 9 of the present application.
  • the optical imaging lens includes: a first lens E1, a diaphragm STO, a second lens E2, a third lens E3, a first lens
  • the four lenses E4 the fifth lens E5, the sixth lens E6, the filter E7, and the imaging surface S15.
  • the first lens E1 has a negative power, and an object-side surface S1 thereof is a convex surface, and an image-side surface S2 thereof is a concave surface.
  • the second lens E2 has a positive power, and the object side surface S3 is a convex surface, and the image side surface S4 is a concave surface.
  • the third lens E3 has a negative power, and the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive power, and the object side surface S7 is a convex surface, and the image side surface S8 is a concave surface.
  • the fifth lens E5 has a negative power
  • the object side surface S9 is a concave surface
  • the image side surface S10 is a concave surface
  • the sixth lens E6 has a negative power
  • the object side surface S11 is a concave surface
  • the image side surface S12 is a convex surface
  • the filter E7 has an object side surface S13 and an image side surface S14. The light from the object sequentially passes through the surfaces S1 to S14 and is finally imaged on the imaging surface S15.
  • Table 25 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 9, where the units of the radius of curvature and thickness are millimeters (mm).
  • Table 26 shows the higher-order term coefficients that can be used for each aspherical mirror surface in Embodiment 9, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • Table 27 shows the effective focal lengths f1 to f6 of each lens in Example 9, the total effective focal length f of the optical imaging lens, the distance TTL on the optical axis from the object side S1 to the imaging surface S15 of the first lens E1, and the maximum half field of view. Angular HFOV.
  • FIG. 18A shows an on-axis chromatic aberration curve of the optical imaging lens of Example 9, which indicates that light rays with different wavelengths deviate from the focal point after passing through the lens.
  • FIG. 18B shows an astigmatism curve of the optical imaging lens of Example 9, which represents a meridional image plane curvature and a sagittal image plane curvature.
  • FIG. 18C shows a distortion curve of the optical imaging lens of Example 9, which represents the magnitude of the distortion at different viewing angles.
  • FIG. 18D shows the magnification chromatic aberration curve of the optical imaging lens of Example 9, which represents the deviation of different image heights on the imaging plane after the light passes through the lens. It can be known from FIG. 18A to FIG. 18D that the optical imaging lens provided in Embodiment 9 can achieve good imaging quality.
  • Examples 1 to 9 satisfy the relationships shown in Table 28, respectively.
  • the present application also provides an imaging device whose electronic photosensitive element may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS).
  • the imaging device may be an independent imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a mobile phone.
  • the imaging device is equipped with the optical imaging lens described above.

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

Abstract

L'invention concerne un objectif d'imagerie optique, comprenant une première lentille, une deuxième lentille, une troisième lentille, une quatrième lentille, une cinquième lentille, et une sixième lentille en séquence d'un côté objet à un côté image et le long d'un axe optique. La première lentille a une puissance focale, sa surface côté objet est une surface convexe, et sa surface côté image est une surface concave ; la deuxième lentille a une puissance focale positive ; la troisième lentille a une puissance focale négative ; la quatrième lentille a une puissance focale ; la cinquième lentille a une puissance focale négative, et sa surface côté image est une surface concave ; la sixième lentille a une puissance focale ; la distance TTL depuis la surface côté objet de la première lentille vers la surface d'imagerie de l'objectif d'imagerie optique sur l'axe optique et la longueur focale effective totale f de l'objectif d'imagerie optique remplissent la condition selon laquelle TTL/f<1. Ainsi, l'objectif d'imagerie a une propriété de téléobjectif et répond à l'exigence de miniaturisation.
PCT/CN2019/076961 2018-06-06 2019-03-05 Objectif d'imagerie optique WO2019233142A1 (fr)

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