WO2021073275A1 - Lentille d'imagerie optique - Google Patents

Lentille d'imagerie optique Download PDF

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Publication number
WO2021073275A1
WO2021073275A1 PCT/CN2020/112068 CN2020112068W WO2021073275A1 WO 2021073275 A1 WO2021073275 A1 WO 2021073275A1 CN 2020112068 W CN2020112068 W CN 2020112068W WO 2021073275 A1 WO2021073275 A1 WO 2021073275A1
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Prior art keywords
lens
optical imaging
imaging lens
optical
object side
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PCT/CN2020/112068
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English (en)
Chinese (zh)
Inventor
黄文博
贺凌波
戴付建
赵烈烽
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浙江舜宇光学有限公司
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Publication of WO2021073275A1 publication Critical patent/WO2021073275A1/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

  • This application relates to the field of optical elements, and in particular, to an optical imaging lens.
  • imaging lenses suitable for portable electronic products such as smart phones are changing with each passing day, and people have higher and higher requirements for the imaging quality of imaging lenses.
  • CCD electrical coupling devices
  • CMOS complementary metal oxide semiconductor devices
  • the corresponding optical imaging lens also needs to meet the requirements of high imaging quality.
  • One aspect of 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 with positive refractive power and a second lens with negative refractive power; The third lens with refractive power, the object side is convex, the image side is concave; the fourth lens with refractive power; the fifth lens with refractive power; the sixth lens with refractive power; the sixth lens with positive refractive power The seventh lens of degrees; the eighth lens with negative refractive power.
  • Half ImgH of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens can satisfy: ImgH ⁇ 5.2mm.
  • the effective focal length f2 of the second lens and the effective focal length f1 of the first lens may satisfy: -2 ⁇ f2/f1 ⁇ 0.
  • the total effective focal length f of the optical imaging lens, the effective focal length f7 of the seventh lens, and the effective focal length f8 of the eighth lens may satisfy: 0.2 ⁇ f/(f7-f8) ⁇ 0.6.
  • the radius of curvature R5 of the object side surface of the third lens and the radius of curvature R6 of the image side surface of the third lens may satisfy: 0.7 ⁇ R5/R6 ⁇ 1.2.
  • the radius of curvature R8 of the image side surface of the fourth lens and the radius of curvature R10 of the image side surface of the fifth lens may satisfy: 0.3 ⁇ R8/R10 ⁇ 1.4.
  • the total effective focal length f of the optical imaging lens, the radius of curvature R13 of the object side surface of the seventh lens, and the radius of curvature R16 of the image side surface of the eighth lens may satisfy: 0.3 ⁇ f/(R13+R16) ⁇ 0.8 .
  • the distance from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis TTL and half the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens ImgH may satisfy: TTL/ ImgH ⁇ 1.45.
  • the separation distance T34 between the third lens and the fourth lens on the optical axis, the central thickness CT4 of the fourth lens on the optical axis and the separation distance T45 between the fourth lens and the fifth lens on the optical axis may be Satisfies: 0.8 ⁇ T34/(CT4+T45) ⁇ 1.3.
  • the central thickness CT7 of the seventh lens on the optical axis, the separation distance T78 between the seventh lens and the eighth lens on the optical axis, and the central thickness CT8 of the fourth lens on the optical axis may satisfy: 0.6 ⁇ CT7/(T78+CT8) ⁇ 1.0.
  • the maximum field of view FOV of the optical imaging lens may satisfy: 77° ⁇ FOV ⁇ 82°.
  • the combined focal length f123 of the first lens, the second lens, and the third lens and the total effective focal length f of the optical imaging lens may satisfy: 1.2 ⁇ f123/f ⁇ 1.7.
  • the distance between the intersection of the object side surface of the sixth lens and the optical axis and the effective radius vertex of the object side of the sixth lens on the optical axis SAG61, the intersection point of the image side surface of the sixth lens and the optical axis to the distance of the sixth lens may satisfy: -3.4 ⁇ (SAG61+SAG62)/CT6 ⁇ -2.0.
  • half of the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens, the entrance pupil diameter EPD of the optical imaging lens and the total effective focal length f of the optical imaging lens may satisfy: 2.7mm ⁇ ImgH ⁇ EPD/f ⁇ 3.7mm.
  • the distance between the intersection of the object side surface of the eighth lens and the optical axis and the effective radius vertex of the object side surface of the eighth lens on the optical axis SAG81 and the separation distance T78 between the seventh lens and the eighth lens on the optical axis can satisfy: -1.2 ⁇ SAG81/T78 ⁇ -0.7.
  • the optical imaging lens according to the present application can have at least one beneficial effect such as a large image area, miniaturization, and high imaging quality.
  • Fig. 1 shows a schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application
  • 2A to 2D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 1;
  • FIG. 3 shows a schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application
  • 4A to 4D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 2;
  • FIG. 5 shows a schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application.
  • 6A to 6D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 3;
  • FIG. 7 shows a schematic structural diagram of an optical imaging lens according to Embodiment 4 of the present application.
  • 8A to 8D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 4;
  • FIG. 9 shows a schematic structural diagram of an optical imaging lens according to Embodiment 5 of the present application.
  • 10A to 10D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 5;
  • FIG. 11 shows a schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application.
  • 12A to 12D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 6;
  • FIG. 13 shows a schematic structural diagram of an optical imaging lens according to Embodiment 7 of the present application.
  • 14A to 14D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Embodiment 7;
  • FIG. 15 shows a schematic structural diagram of an optical imaging lens according to Embodiment 8 of the present application.
  • 16A to 16D respectively show the axial chromatic aberration curve, astigmatism curve, distortion curve, and magnification chromatic aberration curve of the optical imaging lens of Example 8.
  • first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any restriction on the feature. Therefore, without departing from the teachings of the present application, the 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 for ease of description.
  • 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 surface or the aspheric surface is not limited to the shape of the spherical surface or the aspheric surface shown in the drawings.
  • the drawings are only examples and are not drawn strictly to scale.
  • the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface 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 position of the concave surface 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 object is called the object side of the lens, and the surface of each lens closest to the imaging surface is called the image side of the lens.
  • the optical imaging lens according to the exemplary embodiment of the present application may include eight lenses with optical power, which are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens.
  • Lens and eighth lens The eight lenses are arranged in order from the object side to the image side along the optical axis. Any two adjacent lenses among the first lens to the eighth lens may have an interval distance between them.
  • the first lens may have a positive refractive power; the second lens may have a negative refractive power; the third lens may have a positive refractive power or a negative refractive power, the object side may be convex, and the image side may be Concave surface; the fourth lens has positive refractive power or negative refractive power; the fifth lens has positive refractive power or negative refractive power; the sixth lens has positive refractive power or negative refractive power; the seventh lens may have positive refractive power; The eighth lens may have negative refractive power.
  • the first lens has a positive refractive power, which can facilitate the convergence of incident light.
  • the second lens has a negative refractive power, which can help reduce the incident angle of light, balance the spherical aberration generated by the first lens, and improve the on-axis imaging quality.
  • the third lens has a convex-concave surface, which can help shorten the position of the diaphragm, reduce pupil aberration, and improve imaging quality.
  • the seventh lens has positive refractive power, which can help balance the astigmatism generated by the front and rear components of the optical imaging lens.
  • the eighth lens has a negative refractive power, which can help improve the angle of incidence of light on the imaging surface.
  • the optical imaging lens according to the present application may satisfy: ImgH ⁇ 5.2 mm, where ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens. Satisfying ImgH ⁇ 5.2mm can enable the optical imaging lens to acquire more scene content and enrich imaging information.
  • the optical imaging lens according to the present application may satisfy: -2 ⁇ f2/f1 ⁇ 0, where f2 is the effective focal length of the second lens, and f1 is the effective focal length of the first lens. More specifically, f2 and f1 may further satisfy: -2 ⁇ f2/f1 ⁇ -1.6. Satisfying -2 ⁇ f2/f1 ⁇ 0 can reduce the deflection angle of the light and improve the imaging quality of the optical imaging lens.
  • the optical imaging lens according to the present application may satisfy: 0.2 ⁇ f/(f7-f8) ⁇ 0.6, where f is the total effective focal length of the optical imaging lens, and f7 is the effective focal length of the seventh lens, f8 is the effective focal length of the eighth lens. Satisfying 0.2 ⁇ f/(f7-f8) ⁇ 0.6 can effectively reduce the thickness sensitivity of the optical imaging lens, which is beneficial to correct the curvature of field.
  • the optical imaging lens according to the present application may satisfy: 0.7 ⁇ R5/R6 ⁇ 1.2, where R5 is the radius of curvature of the object side surface of the third lens, and R6 is the radius of curvature of the image side surface of the third lens . Satisfying 0.7 ⁇ R5/R6 ⁇ 1.2, the incident angle of the central field of view light when reaching the object side and image side of the third lens can be small, and the MTF tolerance sensitivity of the central field of view can be reduced.
  • the optical imaging lens according to the present application may satisfy: 0.3 ⁇ R8/R10 ⁇ 1.4, where R8 is the radius of curvature of the image side surface of the fourth lens, and R10 is the radius of curvature of the image side surface of the fifth lens . Satisfying 0.3 ⁇ R8/R10 ⁇ 1.4, the size of the incident angle of the edge field of view on the fifth lens can be controlled, which is beneficial to control the external field of view aberration.
  • the optical imaging lens according to the present application may satisfy: 0.3 ⁇ f/(R13+R16) ⁇ 0.8, where f is the total effective focal length of the optical imaging lens, and R13 is the object side of the seventh lens The radius of curvature, R16 is the radius of curvature of the image side surface of the eighth lens. Satisfying 0.3 ⁇ f/(R13+R16) ⁇ 0.8 can make the coma aberration between the on-axis field of view and the off-axis field of view smaller, so that the optical imaging lens has good imaging quality.
  • the optical imaging lens according to the present application may satisfy: TTL/ImgH ⁇ 1.45, where TTL is the distance from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis, and ImgH is the optical axis.
  • TTL is the distance from the object side of the first lens to the imaging surface of the optical imaging lens on the optical axis
  • ImgH is the optical axis.
  • TTL/ImgH ⁇ 1.45 can help reduce the total length of the optical imaging lens and realize the characteristics of ultra-thin and miniaturization.
  • the optical imaging lens according to the present application may satisfy: 0.8 ⁇ T34/(CT4+T45) ⁇ 1.3, where T34 is the separation distance between the third lens and the fourth lens on the optical axis, and CT4 is The center thickness of the fourth lens on the optical axis, T45 is the separation distance between the fourth lens and the fifth lens on the optical axis. Satisfying 0.8 ⁇ T34/(CT4+T45) ⁇ 1.3 can effectively ensure the field curvature of the optical imaging lens, so that the off-axis field of view of the optical imaging lens can obtain good imaging quality.
  • the optical imaging lens according to the present application may satisfy: 0.6 ⁇ CT7/(T78+CT8) ⁇ 1.0, where CT7 is the central thickness of the seventh lens on the optical axis, and T78 is the seventh lens and The separation distance of the eighth lens on the optical axis, CT8 is the center thickness of the fourth lens on the optical axis. Satisfying 0.6 ⁇ CT7/(T78+CT8) ⁇ 1.0, the distortion size of the optical imaging lens can be controlled reasonably, so that the optical imaging lens has good imaging quality.
  • the optical imaging lens according to the present application may satisfy: 77° ⁇ FOV ⁇ 82°, where FOV is the maximum angle of view of the optical imaging lens. Satisfying 77° ⁇ FOV ⁇ 82° can help control the optical imaging lens to collect object information reasonably.
  • the optical imaging lens according to the present application may satisfy: 1.2 ⁇ f123/f ⁇ 1.7, where f123 is the combined focal length of the first lens, the second lens, and the third lens, and f is the focal length of the optical imaging lens Total effective focal length. Satisfying 1.2 ⁇ f123/f ⁇ 1.7 can constrain the on-axis spherical aberration generated by the optical imaging lens within a reasonable interval and ensure the imaging quality of the on-axis field of view.
  • the optical imaging lens according to the present application can satisfy: -3.4 ⁇ (SAG61+SAG62)/CT6 ⁇ -2.0, where SAG61 is the intersection of the object side surface of the sixth lens and the optical axis to the sixth lens The distance between the apex of the effective radius of the object side on the optical axis, SAG62 is the distance from the intersection of the image side of the sixth lens and the optical axis to the apex of the effective radius of the image side of the sixth lens on the optical axis, CT6 is the center of the sixth lens thickness.
  • Satisfying -3.4 ⁇ (SAG61+SAG62)/CT6 ⁇ -2.0 can not only help reduce the sensitivity of the sixth lens, ensure the processing and shaping of the sixth lens, but also help to better balance the miniaturization and axis of the optical imaging lens The relationship between the relative illuminance of the external field of view.
  • the optical imaging lens according to the present application may satisfy: 2.7mm ⁇ ImgH ⁇ EPD/f ⁇ 3.7mm, where ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens , EPD is the entrance pupil diameter of the optical imaging lens, and f is the total effective focal length of the optical imaging lens. More specifically, ImgH, EPD, and f may further satisfy: 2.8mm ⁇ ImgH ⁇ EPD/f ⁇ 3.6mm. Satisfying 2.7mm ⁇ ImgH ⁇ EPD/f ⁇ 3.7mm can not only help realize the miniaturization and ultra-thin characteristics of the optical imaging lens, but also control the off-axis phase contrast value within a reasonable range.
  • the optical imaging lens according to the present application may satisfy: -1.2 ⁇ SAG81/T78 ⁇ -0.7, where SAG81 is the effective distance from the intersection of the object side surface of the eighth lens and the optical axis to the object side surface of the eighth lens The distance between the apex of the radius on the optical axis, T78 is the separation distance between the seventh lens and the eighth lens on the optical axis. Satisfying -1.2 ⁇ SAG81/T78 ⁇ -0.7 is beneficial to control the astigmatism and off-axis aberrations of field curvature of the optical imaging lens and improve the imaging quality of the off-axis field of view.
  • the optical imaging lens according to the present application further includes a diaphragm provided between the object side and the first 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.
  • the optical imaging lens according to the above-mentioned embodiment of the present application may use multiple lenses, for example, the above-mentioned eight lenses.
  • the optical imaging lens configured as described above may have characteristics such as a large image surface, a large viewing angle, and high imaging quality.
  • At least one of the mirror surfaces of each lens is an aspheric mirror surface, that is, at least one of the object side surface of the first lens to the image side surface of the eighth lens is an aspheric mirror surface.
  • the characteristic of an aspheric lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature 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 astigmatism. After the aspheric lens is used, the aberrations that occur during imaging can be eliminated as much as possible, thereby improving the imaging quality.
  • At least one of the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens It is an aspherical mirror surface.
  • the object side and the image side of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens are aspherical lenses. surface.
  • the number of lenses constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification.
  • the optical imaging lens is not limited to including eight lenses. If necessary, the optical imaging lens may also include other numbers of lenses.
  • Fig. 1 shows a schematic structural diagram of an optical imaging lens according to Embodiment 1 of the present application.
  • the optical imaging lens includes in order from the object side to the image side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens.
  • Lens E6 seventh lens E7, eighth lens E8, filter E9 and imaging surface S19.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens E3 has a positive refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive refractive power
  • the object side surface S7 is a concave surface
  • the image side surface S8 is a convex surface.
  • the fifth lens E5 has a positive refractive 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 negative refractive 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 refractive power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a convex surface.
  • the eighth lens E8 has a negative refractive power
  • the object side surface S15 is a concave surface
  • the image side surface S16 is a concave surface.
  • the filter E9 has an object side surface S17 and an image side surface S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.
  • Table 1 shows the basic parameter table of the optical imaging lens of Embodiment 1, wherein the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
  • the total effective focal length f of the optical imaging lens is 6.34mm
  • the total length of the optical imaging lens is TTL (that is, the distance from the object side S1 of the first lens E1 to the imaging surface S19 of the optical imaging lens on the optical axis ) Is 7.79mm
  • the diagonal half ImgH of the effective pixel area on the imaging surface S19 of the optical imaging lens is 5.64mm
  • the maximum field of view FOV of the optical imaging lens is 80.1°.
  • the object side and image side of any one of the first lens E1 to the eighth lens E8 are aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula :
  • x is the distance vector height of the aspheric surface from the vertex of the aspheric surface when the height is h along the optical axis direction;
  • k is the conic coefficient;
  • Ai is the correction coefficient of the i-th order of the aspheric surface.
  • Table 2 shows the high-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 aspheric mirror S1-S16 in Example 1. .
  • FIG. 2A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 1, which represents the deviation of the focusing point of light of different wavelengths after passing through the lens.
  • 2B shows the astigmatism curve of the optical imaging lens of Example 1, which represents meridional field curvature and sagittal field curvature.
  • FIG. 2C shows a distortion curve of the optical imaging lens of Embodiment 1, which represents the distortion magnitude values corresponding to different image heights.
  • FIG. 2D shows the chromatic aberration curve of magnification of the optical imaging lens of Embodiment 1, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to FIGS. 2A to 2D, it can be seen that the optical imaging lens provided in Embodiment 1 can achieve good imaging quality.
  • FIG. 3 shows a schematic structural diagram of an optical imaging lens according to Embodiment 2 of the present application.
  • the optical imaging lens from the object side to the image side includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens.
  • Lens E6 seventh lens E7, eighth lens E8, filter E9 and imaging surface S19.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens E3 has a positive refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive refractive power
  • the object side surface S7 is a concave surface
  • the image side surface S8 is a convex surface.
  • the fifth lens E5 has a positive refractive power
  • the object side surface S9 is a convex surface
  • the image side surface S10 is a convex surface.
  • the sixth lens E6 has a negative refractive 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 refractive power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a convex surface.
  • the eighth lens E8 has a negative refractive power
  • the object side surface S15 is a concave surface
  • the image side surface S16 is a concave surface.
  • the filter E9 has an object side surface S17 and an image side surface S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.
  • the total effective focal length f of the optical imaging lens is 5.78mm
  • the total length TTL of the optical imaging lens is 7.20mm
  • the half of the diagonal length ImgH of the effective pixel area on the imaging surface S19 of the optical imaging lens is 5.20mm
  • the maximum field of view FOV of the optical imaging lens is 80.1°.
  • Table 3 shows the basic parameter table of the optical imaging lens of Embodiment 2, wherein the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
  • Table 4 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 2, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • FIG. 4A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 2, which represents the deviation of the focusing point of light of different wavelengths after passing through the lens.
  • 4B shows the astigmatism curve of the optical imaging lens of Example 2, which represents meridional field curvature and sagittal field curvature.
  • FIG. 4C shows a distortion curve of the optical imaging lens of Embodiment 2, which represents the distortion magnitude values corresponding to different image heights.
  • 4D shows the chromatic aberration curve of magnification of the optical imaging lens of Example 2, which represents the deviation of different image heights on the imaging surface after light passes through the lens. It can be seen from FIGS. 4A to 4D that the optical imaging lens provided in Embodiment 2 can achieve good imaging quality.
  • FIG. 5 shows a schematic structural diagram of an optical imaging lens according to Embodiment 3 of the present application.
  • the optical imaging lens from the object side to the image side includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens.
  • Lens E6 seventh lens E7, eighth lens E8, filter E9 and imaging surface S19.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens E3 has a positive refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface.
  • the fourth lens E4 has a negative refractive power
  • the object side surface S7 is a concave surface
  • the image side surface S8 is a convex surface.
  • the fifth lens E5 has a positive refractive power
  • the object side surface S9 is a convex surface
  • the image side surface S10 is a convex surface.
  • the sixth lens E6 has a negative refractive 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 refractive power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a convex surface.
  • the eighth lens E8 has a negative refractive power
  • the object side surface S15 is a concave surface
  • the image side surface S16 is a concave surface.
  • the filter E9 has an object side surface S17 and an image side surface S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.
  • the total effective focal length f of the optical imaging lens is 5.91mm
  • the total length of the optical imaging lens TTL is 7.49mm
  • the half of the diagonal length of the effective pixel area on the imaging surface S19 of the optical imaging lens ImgH is 5.40mm
  • the maximum field of view FOV of the optical imaging lens is 80.1°.
  • Table 5 shows the basic parameter table of the optical imaging lens of Example 3, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
  • Table 6 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 3, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • FIG. 6A shows an axial chromatic aberration curve of the optical imaging lens of Embodiment 3, which represents the deviation of the focusing point of light of different wavelengths after passing through the lens.
  • Fig. 6B shows the astigmatism curve of the optical imaging lens of Example 3, which represents meridional field curvature and sagittal field curvature.
  • FIG. 6C shows a distortion curve of the optical imaging lens of Embodiment 3, which represents the distortion magnitude values corresponding to different image heights.
  • 6D shows the chromatic aberration curve of magnification of the optical imaging lens of Embodiment 3, which represents the deviation of different image heights on the imaging surface after light passes through the lens. It can be seen from FIGS. 6A to 6D that the optical imaging lens provided in Embodiment 3 can achieve good imaging quality.
  • FIG. 7 shows 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: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens.
  • Lens E6 seventh lens E7, eighth lens E8, filter E9 and imaging surface S19.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens E3 has a positive refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive refractive power
  • the object side surface S7 is a concave surface
  • the image side surface S8 is a convex surface.
  • the fifth lens E5 has a positive refractive 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 negative refractive power
  • the object side surface S11 is a concave surface
  • the image side surface S12 is a concave surface.
  • the seventh lens E7 has a positive refractive power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a convex surface.
  • the eighth lens E8 has a negative refractive power
  • the object side surface S15 is a concave surface
  • the image side surface S16 is a concave surface.
  • the filter E9 has an object side surface S17 and an image side surface S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.
  • the total effective focal length f of the optical imaging lens is 6.32mm
  • the total length of the optical imaging lens TTL is 7.85mm
  • the half of the diagonal length of the effective pixel area on the imaging surface S19 of the optical imaging lens ImgH is 5.50mm
  • the maximum field of view FOV of the optical imaging lens is 78.1°.
  • Table 7 shows the basic parameter table of the optical imaging lens of Embodiment 4, wherein the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
  • Table 8 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 4, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • FIG. 8A shows the on-axis chromatic aberration curve of the optical imaging lens of Embodiment 4, which represents the deviation of the focusing point of light of different wavelengths after passing through the lens.
  • FIG. 8B shows the astigmatism curve of the optical imaging lens of Example 4, which represents meridional field curvature and sagittal field curvature.
  • FIG. 8C shows a distortion curve of the optical imaging lens of Embodiment 4, which represents the distortion magnitude values corresponding to different image heights.
  • FIG. 8D shows the chromatic aberration curve of magnification of the optical imaging lens of Embodiment 4, which represents the deviation of different image heights on the imaging surface after light passes through the lens. It can be seen from FIGS. 8A to 8D that the optical imaging lens provided in Embodiment 4 can achieve good imaging quality.
  • FIG. 9 shows 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: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens.
  • Lens E6 seventh lens E7, eighth lens E8, filter E9 and imaging surface S19.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens E3 has a negative refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive refractive power
  • the object side surface S7 is a convex surface
  • the image side surface S8 is a convex surface.
  • the fifth lens E5 has a positive refractive power
  • the object side surface S9 is a convex surface
  • the image side surface S10 is a convex surface.
  • the sixth lens E6 has a negative refractive 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 refractive power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a convex surface.
  • the eighth lens E8 has a negative refractive power
  • the object side surface S15 is a concave surface
  • the image side surface S16 is a concave surface.
  • the filter E9 has an object side surface S17 and an image side surface S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.
  • the total effective focal length f of the optical imaging lens is 6.37mm
  • the total length of the optical imaging lens TTL is 7.98mm
  • the half of the diagonal length of the effective pixel area on the imaging surface S19 of the optical imaging lens ImgH is 5.80mm
  • the maximum field of view FOV of the optical imaging lens is 80.0°.
  • Table 9 shows the basic parameter table of the optical imaging lens of Embodiment 5, wherein the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
  • Table 10 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 5, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • FIG. 10A shows the on-axis chromatic aberration curve of the optical imaging lens of Embodiment 5, which represents the deviation of the focal point of light rays of different wavelengths after passing through the lens.
  • 10B shows the astigmatism curve of the optical imaging lens of Example 5, which represents meridional field curvature and sagittal field curvature.
  • FIG. 10C shows a distortion curve of the optical imaging lens of Embodiment 5, which represents the distortion magnitude values corresponding to different image heights.
  • FIG. 10D shows the chromatic aberration curve of magnification of the optical imaging lens of Example 5, which represents the deviation of different image heights on the imaging surface after 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 shows a schematic structural diagram of an optical imaging lens according to Embodiment 6 of the present application.
  • the optical imaging lens from the object side to the image side includes: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens.
  • Lens E6 seventh lens E7, eighth lens E8, filter E9 and imaging surface S19.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens E3 has a positive refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive refractive power
  • the object side surface S7 is a concave surface
  • the image side surface S8 is a convex surface.
  • the fifth lens E5 has a negative refractive power
  • the object side surface S9 is concave
  • the image side surface S10 is convex
  • the sixth lens E6 has a negative refractive 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 refractive power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a convex surface.
  • the eighth lens E8 has a negative refractive power
  • the object side surface S15 is a concave surface
  • the image side surface S16 is a concave surface.
  • the filter E9 has an object side surface S17 and an image side surface S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.
  • the total effective focal length f of the optical imaging lens is 6.61mm
  • the total length of the optical imaging lens TTL is 8.29mm
  • the half of the diagonal length of the effective pixel area on the imaging surface S19 of the optical imaging lens ImgH is 6.00mm
  • the maximum field of view FOV of the optical imaging lens is 80.0°.
  • Table 11 shows the basic parameter table of the optical imaging lens of Embodiment 6, wherein the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
  • Table 12 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 6, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • FIG. 12A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 6, which indicates the deviation of the focal point of light rays of different wavelengths after passing through the lens.
  • FIG. 12B shows the astigmatism curve of the optical imaging lens of Example 6, which represents meridional field curvature and sagittal field curvature.
  • FIG. 12C shows the distortion curve of the optical imaging lens of Embodiment 6, which represents the distortion magnitude values corresponding to different image heights.
  • FIG. 12D shows the chromatic aberration curve of magnification of the optical imaging lens of Example 6, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to FIGS. 12A to 12D, it can be seen that the optical imaging lens provided in Embodiment 6 can achieve good imaging quality.
  • FIG. 13 shows 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: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens.
  • Lens E6 seventh lens E7, eighth lens E8, filter E9 and imaging surface S19.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens E3 has a positive refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive refractive power
  • the object side surface S7 is a concave surface
  • the image side surface S8 is a convex surface.
  • the fifth lens E5 has a negative refractive power
  • the object side surface S9 is concave
  • the image side surface S10 is convex.
  • the sixth lens E6 has a positive refractive 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 refractive power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a convex surface.
  • the eighth lens E8 has a negative refractive power
  • the object side surface S15 is a concave surface
  • the image side surface S16 is a concave surface.
  • the filter E9 has an object side surface S17 and an image side surface S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.
  • the total effective focal length f of the optical imaging lens is 7.00mm
  • the total length TTL of the optical imaging lens is 8.53mm
  • the half of the diagonal length of the effective pixel area on the imaging surface S19 of the optical imaging lens ImgH is 6.10mm
  • the maximum field of view FOV of the optical imaging lens is 78.7°.
  • Table 13 shows the basic parameter table of the optical imaging lens of Embodiment 7, wherein the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
  • Table 14 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 7, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • FIG. 14A shows the axial chromatic aberration curve of the optical imaging lens of Embodiment 7, which represents the deviation of the focusing point of light of different wavelengths after passing through the lens.
  • 14B shows the astigmatism curve of the optical imaging lens of Example 7, which represents meridional field curvature and sagittal field curvature.
  • FIG. 14C shows a distortion curve of the optical imaging lens of Embodiment 7, which represents the distortion magnitude values corresponding to different image heights.
  • FIG. 14D shows the chromatic aberration curve of magnification of the optical imaging lens of Example 7, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to FIGS. 14A to 14D, it can be seen that the optical imaging lens provided in Embodiment 7 can achieve good imaging quality.
  • FIG. 15 shows 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: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a sixth lens.
  • Lens E6 seventh lens E7, eighth lens E8, filter E9 and imaging surface S19.
  • the first lens E1 has a positive refractive power
  • the object side surface S1 is a convex surface
  • the image side surface S2 is a concave surface.
  • the second lens E2 has a negative refractive power
  • the object side surface S3 is a convex surface
  • the image side surface S4 is a concave surface.
  • the third lens E3 has a positive refractive power
  • the object side surface S5 is a convex surface
  • the image side surface S6 is a concave surface.
  • the fourth lens E4 has a positive refractive power
  • the object side surface S7 is a concave surface
  • the image side surface S8 is a convex surface.
  • the fifth lens E5 has a positive refractive 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 refractive 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 refractive power
  • the object side surface S13 is a convex surface
  • the image side surface S14 is a convex surface.
  • the eighth lens E8 has a negative refractive power
  • the object side surface S15 is a concave surface
  • the image side surface S16 is a concave surface.
  • the filter E9 has an object side surface S17 and an image side surface S18. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface S19.
  • the total effective focal length f of the optical imaging lens is 7.25mm
  • the total length of the optical imaging lens TTL is 8.86mm
  • the half of the diagonal length of the effective pixel area on the imaging surface S19 of the optical imaging lens ImgH is 6.30mm
  • the maximum field of view FOV of the optical imaging lens is 78.6°.
  • Table 15 shows the basic parameter table of the optical imaging lens of Embodiment 8, wherein the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
  • Table 16 shows the coefficients of higher-order terms that can be used for each aspheric mirror surface in Embodiment 8, where each aspheric surface type can be defined by the formula (1) given in Embodiment 1 above.
  • FIG. 16A shows the axial chromatic aberration curve of the optical imaging lens of Example 8, which represents the deviation of the focal point of light rays of different wavelengths after passing through the lens.
  • 16B shows the astigmatism curve of the optical imaging lens of Example 8, which represents meridional field curvature and sagittal field curvature.
  • FIG. 16C shows a distortion curve of the optical imaging lens of Embodiment 8, which represents the distortion magnitude values corresponding to different image heights.
  • FIG. 16D shows the chromatic aberration curve of magnification of the optical imaging lens of Example 8, which represents the deviation of different image heights on the imaging surface after light passes through the lens. According to FIGS. 16A to 16D, it can be seen that the optical imaging lens provided in Embodiment 8 can achieve good imaging quality.
  • Examples 1 to 8 satisfy the relationships shown in Table 17 respectively.
  • the present application also provides an imaging device, the electronic photosensitive element of which 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 une lentille d'imagerie optique, qui comprend séquentiellement d'un côté objet à un côté image le long d'un axe optique : une première lentille (E1) ayant une puissance dioptrique positive; une deuxième lentille (E2) ayant une puissance dioptrique négative; une troisième lentille (E3) ayant une puissance dioptrique, une surface côté objet (S5) de celle-ci étant une surface convexe, et une surface côté image (S6) étant une surface concave; une quatrième lentille (E4) ayant une puissance dioptrique; une cinquième lentille (E5) ayant une puissance dioptrique; une sixième lentille (E6) ayant une puissance dioptrique; une septième lentille (E7) ayant une puissance dioptrique positive; et une huitième lentille (E8) ayant une puissance dioptrique négative. ImgH, une moitié de la longueur de la diagonale d'une région de pixel effective sur une surface d'imagerie (S19) de la lentille d'imagerie optique satisfait : ImgH ≥ 5,2 mm; la longueur focale effective, f2, de la deuxième lentille (E2) et la longueur focale effective, f1, de la première lentille (E1) satisfont −2 ≤ f2/f1 < 0.
PCT/CN2020/112068 2019-10-17 2020-08-28 Lentille d'imagerie optique WO2021073275A1 (fr)

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WO2021127881A1 (fr) * 2019-12-23 2021-07-01 诚瑞光学(常州)股份有限公司 Lentille optique d'appareil de prise de vues
WO2021127810A1 (fr) * 2019-12-23 2021-07-01 诚瑞光学(常州)股份有限公司 Lentille optique de caméra
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CN116794808A (zh) * 2022-03-10 2023-09-22 华为技术有限公司 一种光学镜头、摄像模组及电子设备

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