WO2020029613A1 - Objectif d'imagerie optique - Google Patents

Objectif d'imagerie optique Download PDF

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Publication number
WO2020029613A1
WO2020029613A1 PCT/CN2019/084949 CN2019084949W WO2020029613A1 WO 2020029613 A1 WO2020029613 A1 WO 2020029613A1 CN 2019084949 W CN2019084949 W CN 2019084949W WO 2020029613 A1 WO2020029613 A1 WO 2020029613A1
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lens
optical imaging
imaging lens
image side
object side
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PCT/CN2019/084949
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English (en)
Chinese (zh)
Inventor
叶丽慧
闻人建科
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浙江舜宇光学有限公司
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Publication of WO2020029613A1 publication Critical patent/WO2020029613A1/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, to an optical imaging lens including seven lenses.
  • the photosensitive elements of general imaging lenses are mainly photosensitive coupling elements (CCD) or complementary metal-oxide-semiconductor elements (CMOS).
  • CCD photosensitive coupling elements
  • CMOS complementary metal-oxide-semiconductor elements
  • the present application provides an optical imaging lens that is applicable to portable electronic products and can at least solve or 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 along the optical axis, a first lens, a second lens, a third lens, and a fourth lens having optical power. , A fifth lens, a sixth lens, and a seventh lens.
  • the first lens may have positive power, the object side may be convex, and the image side may be concave; the second lens may have positive power, and the image side may be convex; the image side of the sixth lens may be concave; seventh The object side of the lens may be convex, and the image side may be concave.
  • a distance T34 between the center thickness CT4 of the fourth lens on the optical axis and the third lens and the fourth lens on the optical axis may satisfy 1.5 ⁇ CT4 / T34 ⁇ 2.5.
  • the effective focal length f5 of the fifth lens and the effective focal length f7 of the seventh lens may satisfy 0.5 ⁇
  • the curvature radius R12 of the image side of the sixth lens and the total effective focal length f of the optical imaging lens may satisfy 0.5 ⁇ R12 / f ⁇ 1.3.
  • the edge thickness ET5 of the fifth lens and the center thickness CT5 of the fifth lens on the optical axis may satisfy 0.5 ⁇ ET5 / CT5 ⁇ 1.
  • the curvature radius R13 of the object side of the seventh lens, the curvature radius R14 of the image side of the seventh lens, and the half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, ImgH can satisfy 0.5 ⁇ ( R13 + R14) / ImgH ⁇ 1.5.
  • the center thickness CT6 of the sixth lens on the optical axis and the center thickness CT7 of the seventh lens on the optical axis may satisfy 1 ⁇ CT7 / CT6 ⁇ 3.
  • the effective focal length f1 of the first lens, 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 1 mm ⁇ f1 ⁇ R2 / (R1 ⁇ 5) ⁇ 2mm .
  • the effective focal length f1 of the first lens and the total effective focal length f of the optical imaging lens may satisfy 1 ⁇ f1 / f ⁇ 1.5.
  • the combined focal length f12 of the first lens and the second lens and the combined focal length f567 of the fifth lens, the sixth lens, and the seventh lens may satisfy 0.1 ⁇
  • 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 half the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens, ImgH can satisfy TTL / ImgH ⁇ 1.4.
  • the maximum half field angle HFOV of the optical imaging lens can satisfy HFOV ⁇ 45 °.
  • the optical imaging lens has an ultra-thin, large-aperture, excellent At least one beneficial effect such as image quality.
  • FIG. 1 shows a schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application
  • FIGS. 2A to 2D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberrations of the optical imaging lens of Embodiment 1; curve;
  • FIG. 3 shows a schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application
  • FIGS. 4A to 4D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberrations of the optical imaging lens of Embodiment 2 curve;
  • FIG. 5 shows a schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application
  • FIGS. 6A to 6D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberrations of the optical imaging lens of Embodiment 3, respectively. curve;
  • FIG. 7 shows a schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application
  • FIGS. 8A to 8D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberrations of the optical imaging lens of Embodiment 4; curve;
  • FIG. 9 shows 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 aberrations of the optical imaging lens of Embodiment 5; curve;
  • FIG. 11 shows a schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application
  • FIGS. 12A to 12D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberrations of the optical imaging lens of Embodiment 6; curve;
  • FIG. 13 shows a schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application
  • FIGS. 14A to 14D respectively show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberrations of the optical imaging lens of Embodiment 7; curve;
  • FIG. 15 shows a schematic structural diagram of an optical imaging lens according to Embodiment 8 of the present application
  • FIGS. 16A to 16D show on-axis chromatic aberration curves, astigmatism curves, distortion curves, and magnification chromatic aberrations of the optical imaging lens of Embodiment 8 respectively. curve.
  • 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 region; 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 region. Concave.
  • the surface of each lens closest to the subject is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.
  • An optical imaging lens may include, for example, seven lenses having optical power, that is, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a first lens. Seven lenses. The seven lenses are sequentially arranged along the optical axis from the object side to the image side, and each adjacent lens can have an air gap.
  • the first lens may have positive power, its object side may be convex, and the image side may be concave; the second lens may have positive power, and its image side may be convex; the third lens may have positive light
  • the optical imaging lens of the present application can satisfy the conditional expression 1.5 ⁇ CT4 / T34 ⁇ 2.5, where CT4 is the center thickness of the fourth lens on the optical axis, and T34 is the third lens and the fourth lens are at The separation distance on the optical axis. More specifically, CT4 and T34 can further satisfy 1.56 ⁇ CT4 / T34 ⁇ 2.24. The reasonable configuration of the air interval between the third lens and the fourth lens on the optical axis and the center thickness of the fourth lens can make the lens have a good ability to eliminate distortion while maintaining the miniaturization characteristics.
  • the optical imaging lens of the present application may satisfy a conditional expression 1 ⁇ f1 / f ⁇ 1.5, where f1 is an effective focal length of the first lens and f is a total effective focal length of the optical imaging lens. More specifically, f1 and f can further satisfy 1.04 ⁇ f1 / f ⁇ 1.33. Controlling the negative power of the first lens to a reasonable range is conducive to increasing the overall focal length of the imaging lens, and it can also play a role in balancing field curvature.
  • the optical imaging lens of the present application can satisfy the conditional TTL / ImgH ⁇ 1.4, where TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical imaging lens, and ImgH is optical The half of the diagonal of the effective pixel area on the imaging surface of the imaging lens. More specifically, TTL and ImgH can further satisfy 1.18 ⁇ TTL / ImgH ⁇ 1.22. The smaller the ratio of TTL to ImgH, the shorter the total optical length TTL of the lens under the same imaging surface size, which is conducive to achieving the ultra-thin characteristics of the optical imaging lens while satisfying the imaging quality.
  • the total size of the imaging lens can be effectively compressed, and the ultra-thin characteristics and miniaturization of the imaging lens can be achieved, so that the above imaging lens can be better suited for size Limited system.
  • the optical imaging lens of the present application may satisfy the conditional expression 0.5 ⁇
  • the power of the fifth lens and the seventh lens are reasonably allocated, and the power of the rear section of the imaging lens is controlled within a small range, which can reduce the deflection angle of the light, thereby reducing the sensitivity of the imaging lens.
  • the optical imaging lens of the present application can satisfy the conditional expression 0.5 ⁇ R12 / f ⁇ 1.3, where R12 is the curvature radius of the image side of the sixth lens, and f is the total effective focal length of the optical imaging lens. More specifically, R12 and f can further satisfy 0.64 ⁇ R12 / f ⁇ 1.08.
  • the reasonable setting of the curvature radius of the object side of the sixth lens is beneficial to the adjustment of the deflection angle of the light, so that the system can easily match the commonly used chip.
  • the optical imaging lens of the present application can satisfy a conditional expression of 0.1 ⁇
  • Reasonably controlling the combined focal lengths of the first lens and the second lens and the combined focal lengths of the fifth lens, the sixth lens, and the seventh lens can effectively correct the distortion of the paraxial region at the image plane and improve the imaging quality of the lens.
  • the optical imaging lens of the present application can satisfy the conditional expression 0.5 ⁇ ET5 / CT5 ⁇ 1, where ET5 is the edge thickness of the fifth lens and CT5 is the center thickness of the fifth lens on the optical axis. More specifically, ET5 and CT5 can further satisfy 0.60 ⁇ ET5 / CT5 ⁇ 0.82. Reasonably controlling the edge thickness and the center thickness of the fifth lens can effectively control the incident angle of light on the image side of the fifth lens, thereby improving the imaging quality of the optical imaging lens.
  • the optical imaging lens of the present application can satisfy a conditional expression of 0.5 ⁇ (R13 + R14) / ImgH ⁇ 1.5, where R13 is a radius of curvature of the object side of the seventh lens, and R14 is an image of the seventh lens.
  • the curvature radius of the side, ImgH is half the length of the diagonal of the effective pixel area on the imaging surface of the optical imaging lens. More specifically, R13, R14, and ImgH can further satisfy 0.71 ⁇ (R13 + R14) /ImgH ⁇ 1.37.
  • the optical imaging lens of the present application can satisfy the conditional expression 1 ⁇ CT7 / CT6 ⁇ 3, where CT6 is the center thickness of the sixth lens on the optical axis and CT7 is the seventh lens on the optical axis. Center thickness. More specifically, CT6 and CT7 can further satisfy 1.10 ⁇ CT7 / CT6 ⁇ 2.92. Reasonably controlling the center thickness of the sixth lens and the center thickness of the seventh lens will help to uniformly distribute the lens size, ensure assembly stability, and help reduce aberrations of the entire optical imaging lens and shorten the overall length of the optical imaging lens .
  • the optical imaging lens of the present application can satisfy the conditional expression 1mm ⁇ f1 ⁇ R2 / (R1 ⁇ 5) ⁇ 2mm, where f1 is an effective focal length of the first lens and R1 is an object side of the first lens
  • the curvature radius of R2 is the curvature radius of the image side of the first lens.
  • f1, R1, and R2 can further satisfy 1.49 mm ⁇ f1 ⁇ R2 / (R1 ⁇ 5) ⁇ 1.91 mm.
  • Reasonably configuring the effective focal length of the first lens and the curvature radii of the object and image sides of the first lens can effectively control the deflection of the light at the first lens and reduce the sensitivity of the lens; at the same time, it is beneficial to reduce the system's ball Aberration, astigmatism, etc., and can effectively improve the imaging quality of optical imaging lenses.
  • the optical imaging lens of the present application can satisfy the conditional expression HFOV ⁇ 45 °, where HFOV is the maximum half field angle of the optical imaging lens. More specifically, HFOV can further satisfy 45.1 ° ⁇ HFOV ⁇ 47.2 °. Under the premise of keeping the size of the lens small, by controlling the angle of field of view, problems such as excessive aberrations of the edge field of view and low illumination can be effectively avoided, and the lens has excellent imaging quality in a wide field of view.
  • the optical imaging lens according to the above embodiment of the present application may employ multiple lenses, such as the seven lenses described above.
  • the size of the lens can be effectively reduced, the sensitivity of the lens can be reduced, and the processability of the lens can be improved.
  • the optical imaging lens configured as above can also have beneficial effects such as ultra-thin, large aperture, and excellent imaging quality.
  • At least one of the mirror surfaces of each lens is an aspherical mirror surface.
  • Aspheric lenses are characterized by a curvature that varies continuously from the center of the lens to the periphery of the lens. Unlike spherical lenses, which have a constant curvature from the lens center to the periphery of the lens, aspheric lenses have better curvature radius characteristics, and have the advantages of improving distortion and astigmatic aberrations. 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 seven 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 an aperture STO, a first lens E1, a second lens E2, a third lens E3, and a first lens along an optical axis in order from the object side to the image side.
  • 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 concave 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 concave surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a positive 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 negative power
  • the object side surface S11 thereof is a concave surface
  • the image side surface S12 is a concave surface.
  • the seventh lens E7 has a negative power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a concave surface.
  • the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 1 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of Example 1, where 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 direction;
  • 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, and A 16 that can be used for each aspherical mirror surface S1-S14 in Example 1.
  • Table 3 shows the effective focal lengths f1 to f7 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 S17 of the first lens E1, and the imaging surface S17
  • the diagonal of the upper effective pixel area is half ImgH and the maximum half field angle HFOV.
  • FIG. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of Embodiment 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 value of distortion corresponding to different image heights.
  • 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 surface after the light passes through the lens. It can be known from FIG. 2A to FIG. 2D 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, an aperture STO, a first lens E1, a second lens E2, a third lens E3, The four lenses E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
  • 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 concave 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 positive 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 negative power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a concave surface.
  • the seventh lens E7 has a positive power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a concave surface.
  • the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • 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 f7 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 S17 of the first lens E1, and the imaging surface S17.
  • the diagonal of the upper effective pixel area is half ImgH and the maximum half field angle 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 the distortion curve of the optical imaging lens of Example 2, which represents the value of the distortion magnitude corresponding to different image heights.
  • 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 application.
  • the optical imaging lens includes, in order from the object side to the image side along the optical axis, an aperture STO, a first lens E1, 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 convex 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 positive power, and the object side surface S7 is a convex surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a positive 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 negative power
  • the object side surface S11 thereof is a concave surface
  • the image side surface S12 is a concave surface.
  • the seventh lens E7 has a negative power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a concave surface.
  • the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • 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 aspherical surface type can be defined by the formula (1) given in Embodiment 1 above.
  • Table 9 shows the effective focal lengths f1 to f7 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 S17 of the first lens E1, and the imaging surface S17.
  • the diagonal of the upper effective pixel area is half ImgH and the maximum half field angle 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 value of the distortion magnitude corresponding to different image heights.
  • FIG. 6D shows the magnification chromatic aberration curve of the optical imaging lens of Example 3, which represents the deviation of different image heights on the imaging plane after the 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, in order from the object side to the image side along the optical axis, an aperture STO, a first lens E1, 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 convex 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 concave surface, and the image side surface S8 is a convex surface.
  • the fifth lens E5 has a positive 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 negative power
  • the object side surface S11 is a convex surface
  • the image side surface S12 is a concave surface.
  • the seventh lens E7 has a positive power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a concave surface.
  • the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • Table 10 shows the surface type, radius of curvature, thickness, material, and 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 high-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 the above Embodiment 1.
  • Table 12 shows the effective focal lengths f1 to f7 of each lens 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 S17 of the first lens E1, and the imaging surface S17
  • the diagonal of the upper effective pixel area is half ImgH and the maximum half field angle 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 value of the distortion magnitude corresponding to different image heights.
  • FIG. 8D shows a 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. According to FIG. 8A to FIG. 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, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a first lens
  • the four lenses E4 the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
  • 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 concave surface, and the image side surface S6 is a convex 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 convex 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 seventh lens E7 has a negative power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a concave surface.
  • the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • 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-mentioned Embodiment 1.
  • Table 15 shows the effective focal lengths f1 to f7 of the lenses in Example 5, 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 S17 of the first lens E1, and the imaging surface S17.
  • the diagonal of the upper effective pixel area is half ImgH and the maximum half field angle HFOV.
  • FIG. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of Embodiment 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 shows a distortion curve of the optical imaging lens of Example 5, which represents the value of the distortion magnitude corresponding to different image heights.
  • 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 plane 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, in order from the object side to the image side along the optical axis, an aperture STO, a first lens E1, 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 convex 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 convex 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 convex 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 seventh lens E7 has a negative power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a concave surface.
  • the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • 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 the above Embodiment 1.
  • Table 18 shows the effective focal lengths f1 to f7 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 S17 of the first lens E1, and the imaging surface S17.
  • the diagonal of the upper effective pixel area is half ImgH and the maximum half field angle HFOV.
  • FIG. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of Example 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 corresponding to different image heights.
  • 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 plane 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, in order from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, The four lenses E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
  • 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 concave surface, and the image side surface S6 is a convex 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 convex 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 seventh lens E7 has a negative power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a concave surface.
  • the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • 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 length f1 to f7 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 S17 of the first lens E1, and the imaging surface S17
  • the diagonal of the upper effective pixel area is half ImgH and the maximum half field angle HFOV.
  • FIG. 14A shows an on-axis chromatic aberration curve of the optical imaging lens of Example 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 illustrates a distortion curve of the optical imaging lens of Example 7, which represents the magnitude of distortion corresponding to different image heights.
  • FIG. 14D shows the 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, in order from the object side to the image side along the optical axis, an aperture STO, a first lens E1, a second lens E2, a third lens E3, a first lens
  • the four lenses E4 the fifth lens E5, the sixth lens E6, the seventh lens E7, the filter E8, and the imaging surface S17.
  • 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 concave surface, and the image side surface S4 is a convex surface.
  • the third lens E3 has a positive 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 convex 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 convex surface
  • the image side surface S12 is a concave surface.
  • the seventh lens E7 has a negative power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a concave surface.
  • the filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and is finally imaged on the imaging surface S17.
  • 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 Embodiment 1.
  • Table 24 shows the effective focal lengths f1 to f7 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 S17 of the first lens E1, and the imaging surface S17.
  • the diagonal of the upper effective pixel area is half ImgH and the maximum half field angle HFOV.
  • FIG. 16A shows an on-axis chromatic aberration curve of the optical imaging lens of Example 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 the distortion curve of the optical imaging lens of Example 8, which represents the value of the distortion magnitude corresponding to different image heights.
  • 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.
  • Examples 1 to 8 satisfy the relationships shown in Table 25, 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

La présente invention concerne un objectif d'imagerie optique qui comprend, successivement depuis un côté objet à un côté image le long d'un axe optique : une première lentille (E1), une deuxième lentille (E2), une troisième lentille (E3), une quatrième lentille (E4), une cinquième lentille (E5), une sixième lentille (E6) et une septième lentille (E7). La première lentille a une puissance focale positive, une surface côté objet convexe et une surface côté image concave ; la deuxième lentille a une puissance focale positive, et une surface côté image convexe ; la surface côté image de la sixième lentille est une surface concave ; la septième lentille a une surface côté objet convexe et une surface côté image concave. L'épaisseur centrale (CT4) de la quatrième lentille sur l'axe optique et la distance d'espacement (T34) de la troisième lentille et de la quatrième lentille sur l'axe optique satisfont 1,5 < CT4/T34 < 2,5.
PCT/CN2019/084949 2018-08-06 2019-04-29 Objectif d'imagerie optique WO2020029613A1 (fr)

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CN112630940A (zh) * 2020-12-30 2021-04-09 厦门力鼎光电股份有限公司 一种大像面的光学成像镜头

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JP7449142B2 (ja) * 2020-04-03 2024-03-13 東京晨美光学電子株式会社 撮像レンズ
CN113391431B (zh) * 2021-05-26 2022-05-17 江西晶超光学有限公司 光学系统和具有其的取像模组、电子装置

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CN112630940A (zh) * 2020-12-30 2021-04-09 厦门力鼎光电股份有限公司 一种大像面的光学成像镜头

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