WO2022000647A1 - 摄像光学镜头 - Google Patents

摄像光学镜头 Download PDF

Info

Publication number
WO2022000647A1
WO2022000647A1 PCT/CN2020/104633 CN2020104633W WO2022000647A1 WO 2022000647 A1 WO2022000647 A1 WO 2022000647A1 CN 2020104633 W CN2020104633 W CN 2020104633W WO 2022000647 A1 WO2022000647 A1 WO 2022000647A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
imaging optical
ttl
curvature
optical lens
Prior art date
Application number
PCT/CN2020/104633
Other languages
English (en)
French (fr)
Inventor
陈佳
孙雯
Original Assignee
诚瑞光学(常州)股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 诚瑞光学(常州)股份有限公司 filed Critical 诚瑞光学(常州)股份有限公司
Publication of WO2022000647A1 publication Critical patent/WO2022000647A1/zh

Links

Images

Classifications

    • 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
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/04—Reversed telephoto objectives
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/64—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having more than six components

Definitions

  • the invention relates to the field of optical lenses, in particular to an imaging optical lens suitable for portable terminal equipment such as smart phones and digital cameras, as well as imaging devices such as monitors and PC lenses.
  • the purpose of the present invention is to provide an imaging optical lens, which has the characteristics of ultra-thin and wide-angle while having good optical performance.
  • the imaging optical lens includes a total of seven lenses, and the seven lenses are sequentially from the object side to the image side: the first lens, the second lens Second lens, third lens, fourth lens, fifth lens, sixth lens, and seventh lens; the first lens has negative refractive power, the third lens has positive refractive power, and the fourth lens has Negative refractive power, the sixth lens has positive refractive power, and the seventh lens has negative refractive power; at least one of the first lens to the seventh lens includes a free-form surface.
  • the overall focal length of the imaging optical lens is f
  • the focal length of the first lens is f1
  • the central radius of curvature of the object side of the first lens is R1
  • the central radius of curvature of the image side of the first lens is R2
  • the on-axis thickness of the first lens is d1
  • the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: -6.45 ⁇ f1/f ⁇ -0.91; -3.75 ⁇ (R1+R2)/ (R1-R2) ⁇ 0.55; 0.03 ⁇ d1/TTL ⁇ 0.17.
  • the overall focal length of the imaging optical lens is f
  • the focal length of the second lens is f2
  • the central radius of curvature of the object side of the second lens is R3
  • the central radius of curvature of the image side of the second lens is R4
  • the on-axis thickness of the second lens is d3
  • the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: -33.96 ⁇ f2/f ⁇ 7.32; -14.62 ⁇ (R3+R4)/( R3-R4) ⁇ 15.24; 0.02 ⁇ d3/TTL ⁇ 0.11.
  • the overall focal length of the imaging optical lens is f
  • the focal length of the third lens is f3
  • the central radius of curvature of the object side of the third lens is R5
  • the central radius of curvature of the image side of the third lens is R6
  • the axial thickness of the third lens is d5
  • the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: 0.46 ⁇ f3/f ⁇ 1.95; -0.20 ⁇ (R5+R6)/(R5 -R6) ⁇ 0.26; 0.05 ⁇ d5/TTL ⁇ 0.20.
  • the overall focal length of the imaging optical lens is f
  • the focal length of the fourth lens is f4
  • the central radius of curvature of the object side of the fourth lens is R7
  • the central radius of curvature of the image side of the fourth lens is R8,
  • the axial thickness of the fourth lens is d7
  • the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: -7.29 ⁇ f4/f ⁇ -1.13; 0.29 ⁇ (R7+R8)/( R7-R8) ⁇ 2.26; 0.02 ⁇ d7/TTL ⁇ 0.07.
  • the overall focal length of the imaging optical lens is f
  • the focal length of the fifth lens is f5
  • the central radius of curvature of the object side of the fifth lens is R9
  • the central radius of curvature of the image side of the fifth lens is R10
  • the on-axis thickness of the fifth lens is d9
  • the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: -231.01 ⁇ f5/f ⁇ 6.79; -23.02 ⁇ (R9+R10)/( R9-R10) ⁇ 2.75; 0.03 ⁇ d9/TTL ⁇ 0.15.
  • the overall focal length of the imaging optical lens is f
  • the focal length of the sixth lens is f6
  • the central radius of curvature of the object side of the sixth lens is R11
  • the central radius of curvature of the image side of the sixth lens is R12
  • the on-axis thickness of the sixth lens is d11
  • the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: 0.47 ⁇ f6/f ⁇ 2.18; 0.45 ⁇ (R11+R12)/(R11- R12) ⁇ 2.53; 0.05 ⁇ d11/TTL ⁇ 0.18.
  • the overall focal length of the imaging optical lens is f
  • the focal length of the seventh lens is f7
  • the central radius of curvature of the object side of the seventh lens is R13
  • the central radius of curvature of the image side of the seventh lens is R14
  • the axial thickness of the seventh lens is d13
  • the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: -4.66 ⁇ f7/f ⁇ -1.07; 0.97 ⁇ (R13+R14)/( R13-R14) ⁇ 5.69; 0.03 ⁇ d13/TTL ⁇ 0.24.
  • the aperture value of the imaging optical lens is FNO, and satisfies the following relational formula: FNO ⁇ 2.06.
  • the total optical length of the imaging optical lens is TTL, and satisfies the following relationship: TTL ⁇ 6.71.
  • the imaging optical lens according to the present invention has the characteristics of ultra-thin and wide-angle, while having good optical performance, and at the same time, from the first lens to the seventh lens, at least one lens contains a free-form surface, It can effectively correct aberrations and further improve the performance of the optical system, especially suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements.
  • FIG. 1 is a schematic structural diagram of an imaging optical lens according to a first embodiment of the present invention
  • Fig. 2 is the situation that the RMS spot diameter of the imaging optical lens shown in Fig. 1 is in the first quadrant;
  • FIG. 3 is a schematic structural diagram of an imaging optical lens according to a second embodiment of the present invention.
  • Fig. 4 is the situation that the RMS spot diameter of the imaging optical lens shown in Fig. 3 is in the first quadrant;
  • FIG. 5 is a schematic structural diagram of an imaging optical lens according to a third embodiment of the present invention.
  • Fig. 6 is the situation that the RMS spot diameter of the imaging optical lens shown in Fig. 5 is in the first quadrant;
  • FIG. 7 is a schematic structural diagram of an imaging optical lens according to a fourth embodiment of the present invention.
  • FIG. 8 shows the case where the RMS spot diameter of the imaging optical lens shown in FIG. 7 is in the first quadrant.
  • FIG. 1 shows an imaging optical lens 10 according to a first embodiment of the present invention.
  • the imaging optical lens 10 includes a total of seven lenses, and the seven lenses are sequentially from the object side to the image side: the first lens L1, second lens L2, aperture S1, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7.
  • Optical elements such as an optical filter GF may be provided between the seventh lens L7 and the image plane Si.
  • the first lens L1 is made of plastic material
  • the second lens L2 is made of plastic material
  • the third lens L3 is made of plastic material
  • the fourth lens L4 is made of plastic material
  • the fifth lens L5 is made of plastic material
  • the sixth lens L6 is made of plastic material It is made of plastic material
  • the seventh lens L7 is made of plastic material.
  • each lens may also be made of other materials.
  • the first lens L1 has a negative refractive power
  • the third lens L3 has a positive refractive power
  • the fourth lens L4 has a negative refractive power
  • At least one of the first lens L1 to the seventh lens L7 is defined to include a free-form surface, which can effectively correct aberrations and further improve the performance of the optical system.
  • the first lens L1 has a negative refractive power
  • the object side of the first lens L1 is concave at the paraxial position
  • the image side surface is convex at the paraxial position.
  • the focal length of the first lens L1 is defined as f1, and the overall focal length of the imaging optical lens 10 is f, which satisfies the following relationship: -6.45 ⁇ f1/f ⁇ -0.91, which specifies the focal length of the first lens L1 and the overall focal length ratio.
  • the first lens has an appropriate negative refractive power, which is conducive to reducing system aberrations, and at the same time, is conducive to the development of ultra-thin and wide-angle lenses.
  • -4.03 ⁇ f1/f ⁇ -1.14 is satisfied.
  • the central radius of curvature of the object side of the first lens L1 is R1
  • the central radius of curvature of the image side of the first lens L1 is R2, which satisfy the following relationship: -3.75 ⁇ (R1+R2)/(R1-R2) ⁇ 0.55
  • the shape of the first lens L1 is reasonably controlled, so that the first lens L1 can effectively correct the spherical aberration of the system.
  • -2.34 ⁇ (R1+R2)/(R1-R2) ⁇ 0.44 is satisfied.
  • the on-axis thickness of the first lens L1 is d1
  • the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.03 ⁇ d1/TTL ⁇ 0.17, which is beneficial to realize ultra-thinning.
  • 0.04 ⁇ d1/TTL ⁇ 0.14 is satisfied.
  • the second lens L2 has a negative refractive power
  • the object side surface is convex at the paraxial position
  • the image side surface is concave at the paraxial position.
  • the focal length of the second lens L2 as f2
  • the overall focal length of the imaging optical lens 10 as f, which satisfies the following relationship: -33.96 ⁇ f2/f ⁇ 7.32, by controlling the focal power of the second lens L2 at A reasonable range is conducive to correcting the aberration of the optical system.
  • -21.22 ⁇ f2/f ⁇ 5.85 is satisfied.
  • the central radius of curvature of the object side of the second lens L2 is R3, and the central radius of curvature of the image side of the second lens L2 is R4, which satisfy the following relationship: -14.62 ⁇ (R3+R4)/(R3-R4) ⁇ 15.24, the shape of the second lens L2 is specified.
  • it is within the range, as the lens develops towards ultra-thin and wide-angle, it is beneficial to correct the problem of axial chromatic aberration.
  • it satisfies -9.14 ⁇ (R3+R4)/( R3-R4) ⁇ 12.19.
  • the on-axis thickness of the second lens L2 is d3, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.02 ⁇ d3/TTL ⁇ 0.11, which is conducive to realizing ultra-thinning. Preferably, 0.04 ⁇ d3/TTL ⁇ 0.09 is satisfied.
  • the third lens L3 has a positive refractive power
  • the object side of the third lens L3 is convex at the paraxial position
  • the image side surface is convex at the paraxial position.
  • the focal length of the third lens L3 is defined as f3, and the overall focal length of the imaging optical lens 10 is f, which satisfies the following relationship: 0.46 ⁇ f3/f ⁇ 1.95, through the reasonable distribution of the optical power, the system has a better high imaging quality and lower sensitivity. Preferably, 0.74 ⁇ f3/f ⁇ 1.56 is satisfied.
  • the central radius of curvature of the object side of the third lens L3 is R5, and the central radius of curvature of the image side of the third lens L3 is R6, which satisfy the following relationship: -0.20 ⁇ (R5+R6)/(R5-R6) ⁇ 0.26,
  • the shape of the third lens is specified, and within the range specified by the conditional expression, the degree of deflection of the light passing through the lens can be alleviated, and aberrations can be effectively reduced.
  • -0.12 ⁇ (R5+R6)/(R5-R6) ⁇ 0.21 is satisfied.
  • the axial thickness of the third lens L3 is d5, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relational formula: 0.05 ⁇ d5/TTL ⁇ 0.20, which is conducive to realizing ultra-thinning.
  • 0.08 ⁇ d5/TTL ⁇ 0.16 is satisfied.
  • the fourth lens L4 has a negative refractive power
  • the object side of the fourth lens L4 is convex at the paraxial position
  • the image side surface is concave at the paraxial position.
  • the focal length of the fourth lens L4 is defined as f4, and the overall focal length of the imaging optical lens 10 is f, which satisfies the following relationship: -7.29 ⁇ f4/f ⁇ -1.13, which specifies the ratio of the focal length of the fourth lens to the system focal length , which helps to improve the performance of the optical system within the range of the conditional expression.
  • f4 The focal length of the fourth lens L4
  • f the overall focal length of the imaging optical lens 10
  • f which satisfies the following relationship: -7.29 ⁇ f4/f ⁇ -1.13, which specifies the ratio of the focal length of the fourth lens to the system focal length , which helps to improve the performance of the optical system within the range of the conditional expression.
  • -4.56 ⁇ f4/f ⁇ -1.42 is satisfied.
  • the central radius of curvature of the object side of the fourth lens L4 is R7
  • the central radius of curvature of the image side of the fourth lens L4 is R8, which satisfy the following relationship: 0.29 ⁇ (R7+R8)/(R7-R8) ⁇ 2.26 , which specifies the shape of the fourth lens L4.
  • the shape is within the range, it is beneficial to correct problems such as aberrations of the off-axis picture angle with the development of ultra-thin and wide-angle.
  • 0.46 ⁇ (R7+R8)/(R7-R8) ⁇ 1.81 is satisfied.
  • the axial thickness of the fourth lens L4 is d7, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relational formula: 0.02 ⁇ d7/TTL ⁇ 0.07, which is conducive to realizing ultra-thinning. Preferably, 0.03 ⁇ d7/TTL ⁇ 0.06 is satisfied.
  • the fifth lens L5 has a negative refractive power
  • the object side surface is concave at the paraxial position
  • the image side surface is concave at the paraxial position.
  • the focal length of the fifth lens L5 is defined as f5, and the overall focal length of the imaging optical lens 10 is f, which satisfies the following relationship: -231.01 ⁇ f5/f ⁇ 6.79, the limitation of the fifth lens L5 can effectively make the imaging
  • the light angle of the lens is flat, reducing tolerance sensitivity.
  • -144.38 ⁇ f5/f ⁇ 5.43 is satisfied.
  • the central radius of curvature of the object side of the fifth lens is R9
  • the central radius of curvature of the image side of the fifth lens is R10
  • the following relationship is satisfied: -23.02 ⁇ (R9+R10)/(R9-R10) ⁇ 2.75
  • the shape of the fifth lens L5 is specified, and when the shape is within the range, with the development of ultra-thin and wide-angle, it is beneficial to correct problems such as aberration of the off-axis picture angle.
  • -14.39 ⁇ (R9+R10)/(R9-R10) ⁇ 2.20 is satisfied.
  • the on-axis thickness of the fifth lens L5 is d9, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relational formula: 0.03 ⁇ d9/TTL ⁇ 0.15, which is conducive to realizing ultra-thinning.
  • 0.05 ⁇ d9/TTL ⁇ 0.12 is satisfied.
  • the sixth lens L6 has a positive refractive power, the object side surface is convex at the paraxial position, and the image side surface is convex at the paraxial position.
  • the focal length of the sixth lens L6 is defined as f6, and the overall focal length of the imaging optical lens 10 is f, which satisfies the following relational formula: 0.47 ⁇ f6/f ⁇ 2.18, within the range of the conditional formula, through the reasonable distribution of the optical power , so that the system has better imaging quality and lower sensitivity.
  • 0.75 ⁇ f6/f ⁇ 1.74 is satisfied.
  • the central radius of curvature of the object side of the sixth lens L6 is R11, and the central radius of curvature of the image side of the sixth lens L6 is R12, which satisfy the following relationship: 0.45 ⁇ (R11+R12)/(R11-R12) ⁇ 2.53 , which specifies the shape of the sixth lens L6.
  • R11 central radius of curvature of the object side of the sixth lens L6
  • R12 central radius of curvature of the image side of the sixth lens L6
  • 0.45 ⁇ (R11+R12)/(R11-R12) ⁇ 2.53 which specifies the shape of the sixth lens L6.
  • 0.72 ⁇ (R11+R12)/(R11-R12) ⁇ 2.03 is satisfied.
  • the axial thickness of the sixth lens L6 is d11, and the optical total length of the imaging optical lens 10 is TTL, which satisfies the following relational formula: 0.05 ⁇ d11/TTL ⁇ 0.18, which is beneficial to realize ultra-thinning.
  • 0.08 ⁇ d11/TTL ⁇ 0.15 is satisfied.
  • the seventh lens L7 has a negative refractive power
  • the object side surface is convex at the paraxial position
  • the image side surface is concave surface at the paraxial position.
  • the focal length of the seventh lens L7 is defined as f7, and the overall focal length of the imaging optical lens 10 is f, which satisfies the following relationship: -4.66 ⁇ f7/f ⁇ -1.07.
  • Reasonable distribution makes the system have better imaging quality and lower sensitivity.
  • -2.92 ⁇ f7/f ⁇ -1.34 is satisfied.
  • the central radius of curvature of the object side of the seventh lens L7 is R13
  • the central radius of curvature of the image side of the seventh lens L7 is R14
  • the following relationship is satisfied: 0.97 ⁇ (R13+R14)/(R13-R14) ⁇ 5.69
  • the shape of the seventh lens L7 is specified.
  • 1.55 ⁇ (R13+R14)/(R13-R14) ⁇ 4.55 is satisfied.
  • the axial thickness of the seventh lens L7 is d13, and the optical total length of the imaging optical lens 10 is TTL, which satisfies the following relational formula: 0.03 ⁇ d13/TTL ⁇ 0.24, which is conducive to realizing ultra-thinning.
  • 0.05 ⁇ d13/TTL ⁇ 0.20 is satisfied.
  • the aperture value FNO of the imaging optical lens 10 is less than or equal to 2.06, the aperture is large, and the imaging performance is good.
  • the FNO is less than or equal to 2.02.
  • the total optical length TTL of the imaging optical lens 10 is less than or equal to 6.71 mm, which is beneficial to realize ultra-thinning.
  • the total optical length TTL is less than or equal to 6.41 mm.
  • the imaging optical lens 10 has good optical performance, and at the same time, the free-form surface can be used to match the designed image area with the actual use area, and the image quality of the effective area can be improved to the greatest extent; according to the characteristics of the optical lens 10
  • the optical lens 10 is especially suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other camera elements.
  • the imaging optical lens 10 of the present invention will be described below by way of examples.
  • the symbols described in each example are as follows.
  • the focal length, on-axis distance, curvature radius, and on-axis thickness are in mm.
  • TTL total optical length (the on-axis distance from the object side of the first lens L1 to the imaging plane), in mm;
  • Aperture value FNO refers to the ratio of the effective focal length of the imaging optical lens to the diameter of the entrance pupil.
  • Table 1 and Table 2 show design data of the imaging optical lens 10 according to the first embodiment of the present invention.
  • the object side surface and the image side surface of the first lens L1 are free-form surfaces.
  • R the radius of curvature at the center of the optical surface
  • R1 the radius of curvature of the object side surface of the first lens L1;
  • R2 the radius of curvature of the image side surface of the first lens L1;
  • R3 the radius of curvature of the object side surface of the second lens L2;
  • R4 the radius of curvature of the image side surface of the second lens L2;
  • R5 the radius of curvature of the object side surface of the third lens L3;
  • R6 the curvature radius of the image side surface of the third lens L3;
  • R7 the curvature radius of the object side surface of the fourth lens L4;
  • R8 the curvature radius of the image side surface of the fourth lens L4;
  • R9 the curvature radius of the object side surface of the fifth lens L5;
  • R10 the curvature radius of the image side surface of the fifth lens L5;
  • R11 the radius of curvature of the object side surface of the sixth lens L6;
  • R12 the curvature radius of the image side surface of the sixth lens L6;
  • R13 the radius of curvature of the object side surface of the seventh lens L7;
  • R14 the curvature radius of the image side surface of the seventh lens L7;
  • R15 The curvature radius of the object side of the optical filter GF
  • R16 The curvature radius of the image side of the optical filter GF
  • d the on-axis thickness of the lens, the on-axis distance between the lenses
  • d0 the on-axis distance from the aperture S1 to the object side surface of the first lens L1;
  • d2 the on-axis distance from the image side of the first lens L1 to the object side of the second lens L2;
  • d4 the on-axis distance from the image side of the second lens L2 to the object side of the third lens L3;
  • d6 the on-axis distance from the image side of the third lens L3 to the object side of the fourth lens L4;
  • d10 the on-axis distance from the image side of the fifth lens L5 to the object side of the sixth lens L6;
  • d11 the on-axis thickness of the sixth lens L6;
  • d12 the on-axis distance from the image side of the sixth lens L6 to the object side of the seventh lens L7;
  • d14 the axial distance from the image side of the seventh lens L7 to the image side of the optical filter GF to the image plane;
  • d16 the axial distance from the image side of the optical filter GF to the image plane
  • nd the refractive index of the d-line
  • nd1 the refractive index of the d-line of the first lens L1;
  • nd2 the refractive index of the d-line of the second lens L2;
  • nd3 the refractive index of the d-line of the third lens L3;
  • nd4 the refractive index of the d-line of the fourth lens L4;
  • nd5 the refractive index of the d-line of the fifth lens L5;
  • nd6 the refractive index of the d-line of the sixth lens L6;
  • nd7 the refractive index of the d-line of the seventh lens L7;
  • ndg the refractive index of the d-line of the optical filter GF
  • vg Abbe number of optical filter GF.
  • Table 2 shows aspherical surface data of each lens in the imaging optical lens 10 according to the first embodiment of the present invention.
  • k is the conic coefficient
  • A4, A6, A8, A10, A12, A14, A16, A18, A20 are the aspheric coefficients
  • c is the curvature at the center of the optical surface
  • r is the vertical distance between the point on the aspheric curve and the optical axis
  • z is the depth of the aspheric surface (the vertical distance between a point on the aspheric surface with a distance r from the optical axis and a tangent plane tangent to the vertex on the optical axis of the aspheric surface).
  • the aspherical surface shown in the above formula (1) is used as the aspherical surface of each lens surface.
  • the present invention is not limited to the aspheric polynomial form represented by the formula (1).
  • Table 3 shows free-form surface data in the imaging optical lens 10 according to the first embodiment of the present invention.
  • k is the conic coefficient
  • Bi is the aspheric coefficient
  • r is the vertical distance between the point on the free-form surface and the optical axis
  • x is the x-direction component of r
  • y is the y-direction component of r
  • z is the aspheric depth (on the aspheric surface The vertical distance between a point at a distance r from the optical axis and a tangent plane tangent to the vertex on the optical axis of the aspheric surface).
  • each free-form surface uses the Extended Polynomial (Extended Polynomial) shown in the above formula (2).
  • the present invention is not limited to the free-form surface polynomial form represented by the formula (2).
  • Fig. 2 shows the case where the RMS spot diameter of the imaging optical lens 10 of the first embodiment is within the first quadrant. It can be seen from Fig. 2 that the imaging optical lens 10 of the first embodiment can achieve good imaging quality.
  • Table 13 shows the values corresponding to the various numerical values in each of Examples 1, 2, 3, and 4 and the parameters specified in the conditional expressions.
  • the first embodiment satisfies each conditional expression.
  • the entrance pupil diameter ENPD of the imaging optical lens is 0.908mm
  • the full field of view image height (diagonal direction) IH is 6.000mm
  • the image height in the x direction is 4.800mm
  • the image height in the y direction is 3.600mm mm
  • the imaging effect is the best within this rectangular range.
  • the FOV in the diagonal direction is 120.00°
  • the field angle in the x direction is 107.36°
  • the field angle in the y direction is 90.83°.
  • the imaging optical lens 10. It meets the design requirements of wide-angle and ultra-thin, and its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.
  • the second embodiment is basically the same as the first embodiment, the meanings of symbols are the same as those of the first embodiment, and only the differences are listed below.
  • FIG. 3 shows the imaging optical lens 20 according to the second embodiment of the present invention.
  • the image side of the fifth lens L5 is convex at the paraxial position
  • the object side of the sixth lens L6 is concave at the paraxial position. .
  • Table 4 and Table 5 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.
  • the object side surface and the image side surface of the sixth lens L6 are free-form surfaces.
  • Table 5 shows aspherical surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.
  • Table 6 shows free-form surface data in the imaging optical lens 20 according to the second embodiment of the present invention.
  • FIG. 4 shows the case where the RMS spot diameter of the imaging optical lens 20 of the second embodiment is within the first quadrant. It can be seen from FIG. 4 that the imaging optical lens 20 of the second embodiment can achieve good imaging quality.
  • the second embodiment satisfies each conditional expression.
  • the entrance pupil diameter ENPD of the imaging optical lens is 0.908mm
  • the full field of view image height (diagonal direction) IH is 6.000mm
  • the image height in the x direction is 4.800mm
  • the image height in the y direction is 3.600mm mm
  • the imaging effect is the best in this rectangular range.
  • the FOV in the diagonal direction is 120.00°
  • the field angle in the x direction is 107.08°
  • the field angle in the y direction is 90.54°.
  • the imaging optical lens 20 meets the design requirements of wide-angle and ultra-thin design, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.
  • the third embodiment is basically the same as the first embodiment, the meanings of symbols are the same as those of the first embodiment, and only the differences are listed below.
  • the second lens L2 has a positive refractive power
  • the fifth lens L5 has a positive refractive power
  • the image side of the first lens L1 is closer to The axis is concave
  • the object side of the fourth lens L4 is concave at the paraxial
  • the image side of the fifth lens L5 is convex at the paraxial
  • the object side of the sixth lens L6 is concave at the paraxial.
  • Tables 7 and 8 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.
  • the object side surface and the image side surface of the second lens L2 are free curved surfaces.
  • Table 8 shows aspherical surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.
  • Table 9 shows free-form surface data in the imaging optical lens 30 according to the third embodiment of the present invention.
  • FIG. 6 shows the case where the RMS spot diameter of the imaging optical lens 30 of the third embodiment is within the first quadrant. It can be seen from FIG. 6 that the imaging optical lens 30 of the third embodiment can achieve good imaging quality.
  • the entrance pupil diameter ENPD of the imaging optical lens is 0.664mm
  • the full field of view image height (diagonal direction) IH is 6.000mm
  • the image height in the x direction is 4.800mm
  • the image height in the y direction is 3.600mm mm
  • the imaging effect is the best in this rectangular range.
  • the FOV in the diagonal direction is 120.43°
  • the field angle in the x direction is 110.45°
  • the field angle in the y direction is 98.99°.
  • the imaging optical lens 30 meets the design requirements of wide-angle and ultra-thin design, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.
  • the fourth embodiment is basically the same as the first embodiment, the meanings of symbols are the same as those of the first embodiment, and only the differences are listed below.
  • the second lens L2 has a positive refractive power
  • the fifth lens L5 has a positive refractive power
  • the image side of the first lens L1 is closer to The axis is concave
  • the object side of the fourth lens L4 is concave at the paraxial
  • the image side of the fifth lens L5 is convex at the paraxial
  • the object side of the sixth lens L6 is concave at the paraxial.
  • Table 10 and Table 11 show design data of the imaging optical lens 40 according to the fourth embodiment of the present invention.
  • the object side surface and the image side surface of the sixth lens L6 are free-form surfaces.
  • Table 11 shows aspherical surface data of each lens in the imaging optical lens 40 according to the fourth embodiment of the present invention.
  • Table 12 shows free-form surface data in the imaging optical lens 40 according to the fourth embodiment of the present invention.
  • FIG. 8 shows the case where the RMS spot diameter of the imaging optical lens 40 of the fourth embodiment is within the first quadrant. It can be seen from FIG. 8 that the imaging optical lens 40 of the fourth embodiment can achieve good imaging quality.
  • the entrance pupil diameter ENPD of the imaging optical lens is 1.071mm
  • the full field of view image height (diagonal direction) IH is 6.000mm
  • the image height in the x direction is 4.800mm
  • the image height in the y direction is 3.600mm mm
  • the imaging effect is the best in this rectangular range.
  • the FOV in the diagonal direction is 113.40°
  • the field angle in the x direction is 97.01°
  • the field angle in the y direction is 79.46°.
  • the imaging optical lens 40 meets the design requirements of wide-angle and ultra-thin design, its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

Landscapes

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

Abstract

一种摄像光学镜头（10），摄像光学镜头（10）共包括七片透镜，七片透镜自物侧至像侧依序为：具有负屈折力的第一透镜（L1），第二透镜（L2），具有正屈折力的第三透镜（L3），具有负屈折力的第四透镜（L4），第五透镜（L5），具有正屈折力的第六透镜（L6），以及具有负屈折力的第七透镜（L7）；第一透镜（L1）至第七透镜（L7）中的至少一个含自由曲面，摄像光学镜头（10）具有良好光学性能的同时，满足超薄化、广角化的设计要求。

Description

摄像光学镜头 技术领域
本发明涉及光学镜头领域，特别涉及一种适用于智能手机、数码相机等手提终端设备，以及监视器、PC镜头等摄像装置的摄像光学镜头。
背景技术
随着成像镜头的发展，人们对镜头的成像要求越来越高，镜头的“夜景拍照”和“背景虚化”也成为衡量镜头成像标准的重要指标。目前多采用旋转对称的非球面，这类非球面只在子午平面内具有充分的自由度，并不能很好的对轴外像差进行校正。且现有结构光焦度分配、透镜间隔和透镜形状设置不充分，造成镜头超薄化和广角化不充分。自由曲面是一种非旋转对称的表面类型，能够更好地平衡像差，提高成像质量，而且自由曲面的加工也逐渐成熟。随着对镜头成像要求的提升，在设计镜头时加入自由曲面显得十分重要，尤其是在广角和超广角镜头的设计中效果更为明显。
发明内容
针对上述问题，本发明的目的在于提供一种摄像光学镜头，其具有良好光学性能的同时，具有超薄化、广角化的特点。
为解决上述技术问题，本发明的实施方式提供了一种摄像光学镜头，所述摄像光学镜头共包括七片透镜，七片所述透镜自物侧至像侧依序为：第一透镜，第二透镜，第三透镜，第四透镜，第五透镜，第六透镜，以及第七透镜；所述第一透镜具有负屈折力，所述第三透镜具有正屈折力，所述第四透镜具有负屈折力，所述第六透镜具有正屈折力，所述第七透镜具有负屈折力；所述第一透镜至所述第七透镜中的至少一个含自由曲面。
优选地，所述摄像光学镜头整体的焦距为f，所述第一透镜的焦距为f1，所述第一透镜物侧面的中心曲率半径为R1，所述第一透镜像侧面的中心曲率半径为R2，所述第一透镜的轴上厚度为d1，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：-6.45≤f1/f≤-0.91；-3.75≤(R1+R2)/(R1-R2)≤0.55；0.03≤d1/TTL≤0.17。
优选地，所述摄像光学镜头整体的焦距为f，所述第二透镜的焦距为f2，所述第二透镜物侧面的中心曲率半径为R3，所述第二透镜像侧面的中心曲率半径为R4，所述第二透镜的轴上厚度为d3，所述摄像光 学镜头的光学总长为TTL，且满足下列关系式：-33.96≤f2/f≤7.32；-14.62≤(R3+R4)/(R3-R4)≤15.24；0.02≤d3/TTL≤0.11。
优选地，所述摄像光学镜头整体的焦距为f，所述第三透镜的焦距为f3，所述第三透镜物侧面的中心曲率半径为R5，所述第三透镜像侧面的中心曲率半径为R6，所述第三透镜的轴上厚度为d5，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：0.46≤f3/f≤1.95；-0.20≤(R5+R6)/(R5-R6)≤0.26；0.05≤d5/TTL≤0.20。
优选地，所述摄像光学镜头整体的焦距为f，所述第四透镜的焦距为f4，所述第四透镜物侧面的中心曲率半径为R7，所述第四透镜像侧面的中心曲率半径为R8，所述第四透镜的轴上厚度为d7，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：-7.29≤f4/f≤-1.13；0.29≤(R7+R8)/(R7-R8)≤2.26；0.02≤d7/TTL≤0.07。
优选地，所述摄像光学镜头整体的焦距为f，所述第五透镜的焦距为f5，所述第五透镜物侧面的中心曲率半径为R9，所述第五透镜像侧面的中心曲率半径为R10，所述第五透镜的轴上厚度为d9，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：-231.01≤f5/f≤6.79；-23.02≤(R9+R10)/(R9-R10)≤2.75；0.03≤d9/TTL≤0.15。
优选地，所述摄像光学镜头整体的焦距为f，所述第六透镜的焦距为f6，所述第六透镜物侧面的中心曲率半径为R11，所述第六透镜像侧面的中心曲率半径为R12，所述第六透镜的轴上厚度为d11，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：0.47≤f6/f≤2.18；0.45≤(R11+R12)/(R11-R12)≤2.53；0.05≤d11/TTL≤0.18。
优选地，所述摄像光学镜头整体的焦距为f，所述第七透镜的焦距为f7，所述第七透镜物侧面的中心曲率半径为R13，所述第七透镜像侧面的中心曲率半径为R14，所述第七透镜的轴上厚度为d13，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：-4.66≤f7/f≤-1.07；0.97≤(R13+R14)/(R13-R14)≤5.69；0.03≤d13/TTL≤0.24。
优选地，所述摄像光学镜头的光圈值为FNO，且满足下列关系式：FNO≤2.06。
优选地，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：TTL≤6.71。
本发明的有益效果在于：根据本发明的摄像光学镜头具有良好光学性能的同时，具有超薄化、广角化的特点，同时，从第一镜片到第七镜片，至少有一个镜片含有自由曲面，可以有效地矫正像差，进一步提升光学系统性能，尤其适用于由高像素用的CCD、CMOS等摄像元件构成的手机摄像镜头组件和WEB摄像镜头。
附图说明
为了更清楚地说明本发明实施方式中的技术方案，下面将对实施方式描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：
图1是本发明第一实施方式的摄像光学镜头的结构示意图；
图2是图1所示摄像光学镜头的RMS光斑直径在第一象限内的情况；
图3是本发明第二实施方式的摄像光学镜头的结构示意图；
图4是图3所示摄像光学镜头的RMS光斑直径在第一象限内的情况；
图5是本发明第三实施方式的摄像光学镜头的结构示意图；
图6是图5所示摄像光学镜头的RMS光斑直径在第一象限内的情况；
图7是本发明第四实施方式的摄像光学镜头的结构示意图；
图8是图7所示摄像光学镜头的RMS光斑直径在第一象限内的情况。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明的各实施方式进行详细的阐述。然而，本领域的普通技术人员可以理解，在本发明各实施方式中，为了使读者更好地理解本发明而提出了许多技术细节。但是，即使没有这些技术细节和基于以下各实施方式的种种变化和修改，也可以实现本发明所要求保护的技术方案。
(第一实施方式)
参考附图，本发明提供了一种摄像光学镜头10。图1所示为本发明第一实施方式的摄像光学镜头10，具体的，所述摄像光学镜头10共包括七片透镜，七片所述透镜由物侧至像侧依序为：第一透镜L1、第二透镜L2、光圈S1、第三透镜L3、第四透镜L4、第五透镜L5、第六透镜L6、第七透镜L7。第七透镜L7和像面Si之间可设置有光学过滤片(filter)GF等光学元件。
在本实施方式中，第一透镜L1为塑料材质，第二透镜L2为塑料材质，第三透镜L3为塑料材质，第四透镜L4为塑料材质，第五透镜 L5为塑料材质，第六透镜L6为塑料材质，第七透镜L7为塑料材质。在其他实施例中，各透镜也可以是其他材质。
本实施方式中，第一透镜L1具有负屈折力，第三透镜L3具有正屈折力，第四透镜L4具有负屈折力。
在本实施方式中，定义所述第一透镜L1至所述第七透镜L7中的至少一个含自由曲面，可以有效地矫正像差，进一步提升光学系统性能。
本实施方式中，所述第一透镜L1具有负屈折力，所述第一透镜L1的物侧面于近轴处为凹面，像侧面于近轴处为凸面。
定义所述第一透镜L1的焦距为f1，所述摄像光学镜头10整体的焦距为f，满足下列关系式：-6.45≤f1/f≤-0.91，规定了第一透镜L1的焦距与整体焦距的比值。在规定的范围内时，第一透镜具有适当的负屈折力，有利于减小系统像差，同时有利于镜头向超薄化、广角化发展。优选地，满足-4.03≤f1/f≤-1.14。
所述第一透镜L1物侧面的中心曲率半径为R1，所述第一透镜L1像侧面的中心曲率半径为R2，满足下列关系式：-3.75≤(R1+R2)/(R1-R2)≤0.55，合理控制第一透镜L1的形状，使得第一透镜L1能够有效地校正系统球差。优选地，满足-2.34≤(R1+R2)/(R1-R2)≤0.44。
所述第一透镜L1的轴上厚度为d1，所述摄像光学镜头10的光学总长为TTL，满足下列关系式：0.03≤d1/TTL≤0.17，有利于实现超薄化。优选地，满足0.04≤d1/TTL≤0.14。
本实施方式中，所述第二透镜L2具有负屈折力，其物侧面于近轴处为凸面，像侧面于近轴处为凹面。
定义所述第二透镜L2的焦距为f2，所述摄像光学镜头10整体的焦距为f，满足下列关系式：-33.96≤f2/f≤7.32，通过将第二透镜L2的光焦度控制在合理范围，有利于矫正光学系统的像差。优选地，满足-21.22≤f2/f≤5.85。
所述第二透镜L2物侧面的中心曲率半径为R3，所述第二透镜L2像侧面的中心曲率半径为R4，满足下列关系式：-14.62≤(R3+R4)/(R3-R4)≤15.24，规定了第二透镜L2的形状，在范围内时，随着镜头向超薄广角化发展，有利于补正轴上色像差问题，优选地，满足-9.14≤(R3+R4)/(R3-R4)≤12.19。
所述第二透镜L2的轴上厚度为d3，所述摄像光学镜头10的光学总长为TTL，满足下列关系式：0.02≤d3/TTL≤0.11，有利于实现超薄化。优选地，满足0.04≤d3/TTL≤0.09。
本实施方式中，所述第三透镜L3具有正屈折力，所述第三透镜L3 的物侧面于近轴处为凸面，像侧面于近轴处为凸面。
定义所述第三透镜L3的焦距为f3，所述摄像光学镜头10整体的焦距为f，满足下列关系式：0.46≤f3/f≤1.95，通过光焦度的合理分配，使得系统具有较佳的成像品质和较低的敏感性。优选地，满足0.74≤f3/f≤1.56。
所述第三透镜L3物侧面的中心曲率半径为R5，第三透镜L3像侧面的中心曲率半径为R6，满足下列关系式：-0.20≤(R5+R6)/(R5-R6)≤0.26，规定了第三透镜的形状，在条件式规定范围内，可以缓和光线经过镜片的偏折程度，有效减小像差。优选地，满足-0.12≤(R5+R6)/(R5-R6)≤0.21。
所述第三透镜L3的轴上厚度为d5，所述摄像光学镜头10的光学总长为TTL，满足下列关系式：0.05≤d5/TTL≤0.20，有利于实现超薄化。优选地，满足0.08≤d5/TTL≤0.16。
本实施方式中，所述第四透镜L4具有负屈折力，所述第四透镜L4的物侧面于近轴处为凸面，像侧面于近轴处为凹面。
定义所述第四透镜L4的焦距为f4，所述摄像光学镜头10整体的焦距为f，满足下列关系式：-7.29≤f4/f≤-1.13，规定了第四透镜焦距与系统焦距的比值，在条件式范围内有助于提高光学系统性能。优选地，满足-4.56≤f4/f≤-1.42。
所述第四透镜L4物侧面的中心曲率半径为R7，所述第四透镜L4像侧面的中心曲率半径为R8，满足下列关系式：0.29≤(R7+R8)/(R7-R8)≤2.26，规定了第四透镜L4的形状，在范围内时，随着超薄广角化的发展，有利于补正轴外画角的像差等问题。优选地，满足0.46≤(R7+R8)/(R7-R8)≤1.81。
所述第四透镜L4的轴上厚度为d7，所述摄像光学镜头10的光学总长为TTL，满足下列关系式：0.02≤d7/TTL≤0.07，有利于实现超薄化。优选地，满足0.03≤d7/TTL≤0.06。
本实施方式中，所述第五透镜L5具有负屈折力，其物侧面于近轴处为凹面，像侧面于近轴处为凹面。
定义所述第五透镜L5的焦距为f5，所述摄像光学镜头10整体的焦距为f，满足下列关系式：-231.01≤f5/f≤6.79，对第五透镜L5的限定可有效的使得摄像镜头的光线角度平缓，降低公差敏感度。优选地，满足-144.38≤f5/f≤5.43。
所述第五透镜物侧面的中心曲率半径为R9，以及所述第五透镜像侧面的中心曲率半径为R10，且满足下列关系式：-23.02≤(R9+R10)/(R9-R10)≤2.75，规定了第五透镜L5的形状，在范围内时， 随着超薄广角化的发展，有利于补正轴外画角的像差等问题。优选地，满足-14.39≤(R9+R10)/(R9-R10)≤2.20。
所述第五透镜L5的轴上厚度为d9，所述摄像光学镜头10的光学总长为TTL，满足下列关系式：0.03≤d9/TTL≤0.15，有利于实现超薄化。优选地，满足0.05≤d9/TTL≤0.12。
本实施方式中，所述第六透镜L6具有正屈折力，其物侧面于近轴处为凸面，像侧面于近轴处为凸面。
定义所述第六透镜L6的焦距为f6，所述摄像光学镜头10整体的焦距为f，满足下列关系式：0.47≤f6/f≤2.18，在条件式范围内，通过光焦度的合理分配，使得系统具有较佳的成像品质和较低的敏感性。优选地，满足0.75≤f6/f≤1.74。
所述第六透镜L6物侧面的中心曲率半径为R11，所述第六透镜L6像侧面的中心曲率半径为R12，满足下列关系式：0.45≤(R11+R12)/(R11-R12)≤2.53，规定的是第六透镜L6的形状，在条件范围内时，随着超薄广角化发展，有利于补正轴外画角的像差等问题。优选地，满足0.72≤(R11+R12)/(R11-R12)≤2.03。
所述第六透镜L6的轴上厚度为d11，所述摄像光学镜头10的光学总长为TTL，满足下列关系式：0.05≤d11/TTL≤0.18，有利于实现超薄化。优选地，满足0.08≤d11/TTL≤0.15。
本实施方式中，所述第七透镜L7具有负屈折力，其物侧面于近轴处为凸面，像侧面于近轴处为凹面。
定义所述第七透镜L7的焦距为f7，所述摄像光学镜头10整体的焦距为f，满足下列关系式：-4.66≤f7/f≤-1.07，在条件式范围内，通过光焦度的合理分配，使得系统具有较佳的成像品质和较低的敏感性。优选地，满足-2.92≤f7/f≤-1.34。
所述第七透镜L7物侧面的中心曲率半径为R13，所述第七透镜L7像侧面的中心曲率半径为R14，且满足下列关系式：0.97≤(R13+R14)/(R13-R14)≤5.69，规定了第七透镜L7的形状，在条件范围内时，随着超薄广角化发展，有利于补正轴外画角的像差等问题。优选地，满足1.55≤(R13+R14)/(R13-R14)≤4.55。
所述第七透镜L7的轴上厚度为d13，所述摄像光学镜头10的光学总长为TTL，满足下列关系式：0.03≤d13/TTL≤0.24，有利于实现超薄化。优选地，满足0.05≤d13/TTL≤0.20。
本实施方式中，摄像光学镜头10的光圈值FNO小于或等于2.06，大光圈，成像性能好。优选地，FNO小于或等于2.02。
本实施方式中，摄像光学镜头10的光学总长TTL小于或等于6.71 毫米，有利于实现超薄化。优选地，光学总长TTL小于或等于6.41毫米。
当满足上述关系时，使得摄像光学镜头10具有良好光学性能的同时，采用自由曲面，可实现设计像面区域与实际使用区域匹配，最大程度提升有效区域的像质；根据该光学镜头10的特性，该光学镜头10尤其适用于由高像素用的CCD、CMOS等摄像元件构成的手机摄像镜头组件和WEB摄像镜头。
下面将用实例进行说明本发明的摄像光学镜头10。各实例中所记载的符号如下所示。焦距、轴上距离、曲率半径、轴上厚度的单位为mm。
TTL：光学总长(第一透镜L1的物侧面到成像面的轴上距离)，单位为mm；
光圈值FNO：是指摄像光学镜头的有效焦距和入瞳直径的比值。
表1、表2示出本发明第一实施方式的摄像光学镜头10的设计数据。其中，第一透镜L1的物侧面和像侧面为自由曲面。
【表1】
Figure PCTCN2020104633-appb-000001
其中，各符号的含义如下。
S1：光圈；
R：光学面中心处的曲率半径；
R1：第一透镜L1的物侧面的曲率半径；
R2：第一透镜L1的像侧面的曲率半径；
R3：第二透镜L2的物侧面的曲率半径；
R4：第二透镜L2的像侧面的曲率半径；
R5：第三透镜L3的物侧面的曲率半径；
R6：第三透镜L3的像侧面的曲率半径；
R7：第四透镜L4的物侧面的曲率半径；
R8：第四透镜L4的像侧面的曲率半径；
R9：第五透镜L5的物侧面的曲率半径；
R10：第五透镜L5的像侧面的曲率半径；
R11：第六透镜L6的物侧面的曲率半径；
R12：第六透镜L6的像侧面的曲率半径；
R13：第七透镜L7的物侧面的曲率半径；
R14：第七透镜L7的像侧面的曲率半径；
R15：光学过滤片GF的物侧面的曲率半径；
R16：光学过滤片GF的像侧面的曲率半径；
d：透镜的轴上厚度、透镜之间的轴上距离；
d0：光圈S1到第一透镜L1的物侧面的轴上距离；
d1：第一透镜L1的轴上厚度；
d2：第一透镜L1的像侧面到第二透镜L2的物侧面的轴上距离；
d3：第二透镜L2的轴上厚度；
d4：第二透镜L2的像侧面到第三透镜L3的物侧面的轴上距离；
d5：第三透镜L3的轴上厚度；
d6：第三透镜L3的像侧面到第四透镜L4的物侧面的轴上距离；
d7：第四透镜L4的轴上厚度；
d8：第四透镜L4的像侧面到第五透镜L5的物侧面的轴上距离；
d9：第五透镜L5的轴上厚度；
d10：第五透镜L5的像侧面到第六透镜L6的物侧面的轴上距离；
d11：第六透镜L6的轴上厚度；
d12：第六透镜L6的像侧面到第七透镜L7的物侧面的轴上距离；
d13：第七透镜L7的轴上厚度；
d14：第七透镜L7的像侧面到光学过滤片GF的像侧面到像面的轴上距离；
d15：光学过滤片GF的轴上厚度；
d16：光学过滤片GF的像侧面到像面的轴上距离；
nd：d线的折射率；
nd1：第一透镜L1的d线的折射率；
nd2：第二透镜L2的d线的折射率；
nd3：第三透镜L3的d线的折射率；
nd4：第四透镜L4的d线的折射率；
nd5：第五透镜L5的d线的折射率；
nd6：第六透镜L6的d线的折射率；
nd7：第七透镜L7的d线的折射率；
ndg：光学过滤片GF的d线的折射率；
vd：阿贝数；
v1：第一透镜L1的阿贝数；
v2：第二透镜L2的阿贝数；
v3：第三透镜L3的阿贝数；
v4：第四透镜L4的阿贝数；
v5：第五透镜L5的阿贝数；
v6：第六透镜L6的阿贝数；
v7：第七透镜L7的阿贝数；
vg：光学过滤片GF的阿贝数。
表2示出本发明第一实施方式的摄像光学镜头10中各透镜的非球面数据。
【表2】
Figure PCTCN2020104633-appb-000002
Figure PCTCN2020104633-appb-000003
z＝(cr 2)/{1+[1-(k+1)(c 2r 2)] 1/2}+A4x 4+A6x 6+A8x 8+A10x 10+A12x 12+A14x 14+A16x 16+A18x 18+A20x 20      (1)
其中，k是圆锥系数，A4、A6、A8、A10、A12、A14、A16、A18、A20是非球面系数，c是光学面中心处的曲率，r是非球面曲线上的点与光轴的垂直距离，z是非球面深度(非球面上距离光轴为r的点，与相切于非球面光轴上顶点的切面两者间的垂直距离)。
为方便起见，各个透镜面的非球面使用上述公式(1)中所示的非球面。但是，本发明不限于该公式(1)表示的非球面多项式形式。
表3示出本发明第一实施方式的摄像光学镜头10中的自由曲面数据。
【表3】
Figure PCTCN2020104633-appb-000004
Figure PCTCN2020104633-appb-000005
其中，k是圆锥系数，Bi是非球面系数，r是自由曲面上的点与光轴的垂直距离，x是r的x方向分量，y是r的y方向分量，z是非球面深度(非球面上距离光轴为r的点，与相切于非球面光轴上顶点的切面两者间的垂直距离)。
为方便起见，各个自由曲面使用上述公式(2)中所示的扩展多项式面型(Extended Polynomial)。但是，本发明不限于该公式(2)表示的自由曲面多项式形式。
图2示出了第一实施例的摄像光学镜头10的RMS光斑直径在第 一象限内的情况，根据图2可知，第一实施方式的摄像光学镜头10能够实现良好的成像品质。
后出现的表13示出各实例1、2、3、4中各种数值与条件式中已规定的参数所对应的值。
如表13所示，第一实施方式满足各条件式。
在本实施方式中，所述摄像光学镜头的入瞳直径ENPD为0.908mm，全视场像高(对角线方向)IH为6.000mm，x方向像高为4.800mm，y方向像高为3.600mm，在此矩形范围内成像效果最佳，对角线方向的视场角FOV为120.00°，x方向的视场角为107.36°，y方向的视场角为90.83°，所述摄像光学镜头10满足广角化、超薄化的设计要求，其轴上、轴外色像差被充分补正，且具有优秀的光学特征。
(第二实施方式)
第二实施方式与第一实施方式基本相同，符号含义与第一实施方式相同，以下只列出不同点。
图3所示为本发明第二实施方式的摄像光学镜头20，在本实施方式中，第五透镜L5的像侧面于近轴处为凸面，第六透镜L6的物侧面于近轴处为凹面。
表4、表5示出本发明第二实施方式的摄像光学镜头20的设计数据。其中，第六透镜L6的物侧面和像侧面为自由曲面。
【表4】
Figure PCTCN2020104633-appb-000006
Figure PCTCN2020104633-appb-000007
表5示出本发明第二实施方式的摄像光学镜头20中各透镜的非球面数据。
【表5】
Figure PCTCN2020104633-appb-000008
表6示出本发明第二实施方式的摄像光学镜头20中的自由曲面数据。
【表6】
Figure PCTCN2020104633-appb-000009
Figure PCTCN2020104633-appb-000010
图4示出了第二实施例的摄像光学镜头20的RMS光斑直径在第一象限内的情况，根据图4可知，第二实施方式的摄像光学镜头20能够实现良好的成像品质。
如表13所示，第二实施方式满足各条件式。
在本实施方式中，所述摄像光学镜头的入瞳直径ENPD为0.908mm，全视场像高(对角线方向)IH为6.000mm，x方向像高为4.800mm，y方向像高为3.600mm，在此矩形范围内成像效果最佳，对角线方向的视场角FOV为120.00°，x方向的视场角为107.08°，y方向的视场角为90.54°，所述摄像光学镜头20满足广角化、超薄化的设计要求，其轴上、轴外色像差被充分补正，且具有优秀的光学特征。
(第三实施方式)
第三实施方式与第一实施方式基本相同，符号含义与第一实施方式相同，以下只列出不同点。
图5所示为本发明第三实施方式的摄像光学镜头30，在本实施方式中，第二透镜L2具有正屈折力，第五透镜L5具有正屈折力，第一透镜L1的像侧面于近轴处为凹面，第四透镜L4的物侧面于近轴处为凹面，第五透镜L5的像侧面于近轴处为凸面，第六透镜L6的物侧面于近轴处为凹面。
表7、表8示出本发明第三实施方式的摄像光学镜头30的设计数据。其中，第二透镜L2的物侧面和像侧面为自由曲面。
【表7】
Figure PCTCN2020104633-appb-000011
表8示出本发明第三实施方式的摄像光学镜头30中各透镜的非球面数据。
【表8】
Figure PCTCN2020104633-appb-000012
Figure PCTCN2020104633-appb-000013
表9示出本发明第三实施方式的摄像光学镜头30中的自由曲面数据。
【表9】
Figure PCTCN2020104633-appb-000014
Figure PCTCN2020104633-appb-000015
图6示出了第三实施例的摄像光学镜头30的RMS光斑直径在第一象限内的情况，根据图6可知，第三实施方式的摄像光学镜头30能够实现良好的成像品质。
以下表13按照上述条件式列出了本实施方式中对应各条件式的数值。显然，本实施方式的摄像光学系统满足上述的条件式。
在本实施方式中，所述摄像光学镜头的入瞳直径ENPD为0.664mm，全视场像高(对角线方向)IH为6.000mm，x方向像高为4.800mm，y方向像高为3.600mm，在此矩形范围内成像效果最佳，对角线方向的视场角FOV为120.43°，x方向的视场角为110.45°，y方向的视场角为98.99°，所述摄像光学镜头30满足广角化、超薄化的设计要求，其轴上、轴外色像差被充分补正，且具有优秀的光学特征。
(第四实施方式)
第四实施方式与第一实施方式基本相同，符号含义与第一实施方式相同，以下只列出不同点。
图7所示为本发明第四实施方式的摄像光学镜头40，在本实施方式中，第二透镜L2具有正屈折力，第五透镜L5具有正屈折力，第一透镜L1的像侧面于近轴处为凹面，第四透镜L4的物侧面于近轴处为凹面，第五透镜L5的像侧面于近轴处为凸面，第六透镜L6的物侧面于近轴处为凹面。
表10、表11示出本发明第四实施方式的摄像光学镜头40的设计数据。其中，第六透镜L6的物侧面和像侧面为自由曲面。
【表10】
Figure PCTCN2020104633-appb-000016
Figure PCTCN2020104633-appb-000017
表11示出本发明第四实施方式的摄像光学镜头40中各透镜的非球面数据。
【表11】
Figure PCTCN2020104633-appb-000018
Figure PCTCN2020104633-appb-000019
表12示出本发明第四实施方式的摄像光学镜头40中的自由曲面数据。
【表12】
Figure PCTCN2020104633-appb-000020
图8示出了第四实施例的摄像光学镜头40的RMS光斑直径在第 一象限内的情况，根据图8可知，第四实施方式的摄像光学镜头40能够实现良好的成像品质。
以下表13按照上述条件式列出了本实施方式中对应各条件式的数值。显然，本实施方式的摄像光学系统满足上述的条件式。
在本实施方式中，所述摄像光学镜头的入瞳直径ENPD为1.071mm，全视场像高(对角线方向)IH为6.000mm，x方向像高为4.800mm，y方向像高为3.600mm，在此矩形范围内成像效果最佳，对角线方向的视场角FOV为113.40°，x方向的视场角为97.01°，y方向的视场角为79.46°，所述摄像光学镜头40满足广角化、超薄化的设计要求，其轴上、轴外色像差被充分补正，且具有优秀的光学特征。
【表13】
Figure PCTCN2020104633-appb-000021
本领域的普通技术人员可以理解，上述各实施方式是实现本发明的具体实施方式，而在实际应用中，可以在形式上和细节上对其作各种改变，而不偏离本发明的精神和范围。

Claims (10)

  1. 一种摄像光学镜头，其特征在于，所述摄像光学镜头共包括七片透镜，七片所述透镜自物侧至像侧依序为：第一透镜，第二透镜，第三透镜，第四透镜，第五透镜，第六透镜，以及第七透镜；所述第一透镜具有负屈折力，所述第三透镜具有正屈折力，所述第四透镜具有负屈折力，所述第六透镜具有正屈折力，所述第七透镜具有负屈折力；
    所述第一透镜至所述第七透镜中的至少一个含自由曲面。
  2. 根据权利要求1所述的摄像光学镜头，其特征在于，所述摄像光学镜头整体的焦距为f，所述第一透镜的焦距为f1，所述第一透镜物侧面的中心曲率半径为R1，所述第一透镜像侧面的中心曲率半径为R2，所述第一透镜的轴上厚度为d1，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：
    -6.45≤f1/f≤-0.91；
    -3.75≤(R1+R2)/(R1-R2)≤0.55；
    0.03≤d1/TTL≤0.17。
  3. 根据权利要求1所述的摄像光学镜头，其特征在于，所述摄像光学镜头整体的焦距为f，所述第二透镜的焦距为f2，所述第二透镜物侧面的中心曲率半径为R3，所述第二透镜像侧面的中心曲率半径为R4，所述第二透镜的轴上厚度为d3，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：
    -33.96≤f2/f≤7.32；
    -14.62≤(R3+R4)/(R3-R4)≤15.24；
    0.02≤d3/TTL≤0.11。
  4. 根据权利要求1所述的摄像光学镜头，其特征在于，所述摄像光学镜头整体的焦距为f，所述第三透镜的焦距为f3，所述第三透镜物侧面的中心曲率半径为R5，所述第三透镜像侧面的中心曲率半径为R6，所述第三透镜的轴上厚度为d5，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：
    0.46≤f3/f≤1.95；
    -0.20≤(R5+R6)/(R5-R6)≤0.26；
    0.05≤d5/TTL≤0.20。
  5. 根据权利要求1所述的摄像光学镜头，其特征在于，所述摄像光学镜头整体的焦距为f，所述第四透镜的焦距为f4，所述第四透镜物侧面的中心曲率半径为R7，所述第四透镜像侧面的中心曲率半径为R8，所述第四透 镜的轴上厚度为d7，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：
    -7.29≤f4/f≤-1.13；
    0.29≤(R7+R8)/(R7-R8)≤2.26；
    0.02≤d7/TTL≤0.07。
  6. 根据权利要求1所述的摄像光学镜头，其特征在于，所述摄像光学镜头整体的焦距为f，所述第五透镜的焦距为f5，所述第五透镜物侧面的中心曲率半径为R9，所述第五透镜像侧面的中心曲率半径为R10，所述第五透镜的轴上厚度为d9，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：
    -231.01≤f5/f≤6.79；
    -23.02≤(R9+R10)/(R9-R10)≤2.75；
    0.03≤d9/TTL≤0.15。
  7. 根据权利要求1所述的摄像光学镜头，其特征在于，所述摄像光学镜头整体的焦距为f，所述第六透镜的焦距为f6，所述第六透镜物侧面的中心曲率半径为R11，所述第六透镜像侧面的中心曲率半径为R12，所述第六透镜的轴上厚度为d11，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：
    0.47≤f6/f≤2.18；
    0.45≤(R11+R12)/(R11-R12)≤2.53；
    0.05≤d11/TTL≤0.18。
  8. 根据权利要求1所述的摄像光学镜头，其特征在于，所述摄像光学镜头整体的焦距为f，所述第七透镜的焦距为f7，所述第七透镜物侧面的中心曲率半径为R13，所述第七透镜像侧面的中心曲率半径为R14，所述第七透镜的轴上厚度为d13，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：
    -4.66≤f7/f≤-1.07；
    0.97≤(R13+R14)/(R13-R14)≤5.69；
    0.03≤d13/TTL≤0.24。
  9. 根据权利要求1所述的摄像光学镜头，其特征在于，所述摄像光学镜头的光圈值为FNO，且满足下列关系式：
    FNO≤2.06。
  10. 根据权利要求1所述的摄像光学镜头，其特征在于，所述摄像光 学镜头的光学总长为TTL，且满足下列关系式：
    TTL≤6.71。
PCT/CN2020/104633 2020-07-02 2020-07-24 摄像光学镜头 WO2022000647A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010624418.5 2020-07-02
CN202010624418.5A CN111505812B (zh) 2020-07-02 2020-07-02 摄像光学镜头

Publications (1)

Publication Number Publication Date
WO2022000647A1 true WO2022000647A1 (zh) 2022-01-06

Family

ID=71873810

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/104633 WO2022000647A1 (zh) 2020-07-02 2020-07-24 摄像光学镜头

Country Status (4)

Country Link
US (1) US11835685B2 (zh)
JP (1) JP7079296B2 (zh)
CN (1) CN111505812B (zh)
WO (1) WO2022000647A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115097605A (zh) * 2022-07-09 2022-09-23 苏州大学 一种物像双倾斜成像光学系统及其设计方法
CN117289437A (zh) * 2023-11-27 2023-12-26 江西联创电子有限公司 光学镜头

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111505811B (zh) * 2020-07-02 2020-10-16 瑞声通讯科技(常州)有限公司 摄像光学镜头
CN111983781B (zh) * 2020-09-01 2023-07-21 玉晶光电(厦门)有限公司 光学成像镜头
CN114265187B (zh) * 2022-03-02 2022-07-26 江西联益光学有限公司 光学镜头及成像设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018105955A (ja) * 2016-12-26 2018-07-05 富士フイルム株式会社 撮像レンズおよび撮像装置
CN108873253A (zh) * 2018-07-02 2018-11-23 浙江舜宇光学有限公司 摄像镜头
CN108873254A (zh) * 2018-07-05 2018-11-23 浙江舜宇光学有限公司 光学成像系统
CN111025563A (zh) * 2019-12-26 2020-04-17 瑞声通讯科技(常州)有限公司 摄像光学镜头
CN111221104A (zh) * 2019-12-26 2020-06-02 瑞声通讯科技(常州)有限公司 摄像光学镜头
CN111505810A (zh) * 2020-07-02 2020-08-07 瑞声通讯科技(常州)有限公司 摄像光学镜头

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5404246A (en) * 1992-06-26 1995-04-04 Mitsubishi Denki Kabushiki Kaisha Projection lens system
JPH08248310A (ja) * 1995-03-13 1996-09-27 Minolta Co Ltd 収差可変レンズ
JP2006011093A (ja) * 2004-06-25 2006-01-12 Konica Minolta Opto Inc 超広角光学系、撮像装置、車載カメラ及びデジタル機器
JP5275887B2 (ja) * 2009-04-22 2013-08-28 オリンパス株式会社 光学ユニット
US9726862B2 (en) * 2012-11-08 2017-08-08 DynaOptics LTD, A Public Limited CO. Lens assemblies and actuators for optical systems and methods therefor
JP2016148725A (ja) * 2015-02-10 2016-08-18 株式会社トヨテック 広角レンズ及び広角レンズユニット
JP2016194653A (ja) * 2015-04-01 2016-11-17 日精テクノロジー株式会社 撮像光学系及びそれを有する撮像装置
CN106324797B (zh) * 2015-06-29 2018-12-28 佳能企业股份有限公司 光学镜头
US9874724B2 (en) * 2015-12-24 2018-01-23 AAC Technologies Pte. Ltd. Photographic optical system
JP6643090B2 (ja) * 2016-01-12 2020-02-12 ナンチャン オー−フィルム オプティカル−エレクトロニック テック カンパニー リミテッド 撮像レンズおよび撮像装置
US10067314B2 (en) * 2016-01-21 2018-09-04 Panasonic Intellectual Property Management Co., Ltd. Lens system and camera system including the lens system
TWI614517B (zh) * 2017-01-04 2018-02-11 大立光電股份有限公司 影像擷取系統、取像裝置及電子裝置
WO2018230033A1 (ja) * 2017-06-13 2018-12-20 パナソニックＩｐマネジメント株式会社 レンズ系、カメラシステム及び撮像システム
TWI647511B (zh) * 2018-03-07 2019-01-11 大立光電股份有限公司 攝像用光學鏡組、取像裝置及電子裝置
CN108957692B (zh) * 2018-06-29 2023-07-25 玉晶光电(厦门)有限公司 光学成像镜头
CN108957691B (zh) * 2018-06-29 2020-12-15 玉晶光电(厦门)有限公司 一种光学成像镜头
JP6630418B1 (ja) * 2018-08-14 2020-01-15 エーエーシー テクノロジーズ ピーティーイー リミテッド 撮像光学レンズ
TWI674432B (zh) * 2019-02-01 2019-10-11 大立光電股份有限公司 光學攝影透鏡組、取像裝置及電子裝置
CN111505811B (zh) * 2020-07-02 2020-10-16 瑞声通讯科技(常州)有限公司 摄像光学镜头

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018105955A (ja) * 2016-12-26 2018-07-05 富士フイルム株式会社 撮像レンズおよび撮像装置
CN108873253A (zh) * 2018-07-02 2018-11-23 浙江舜宇光学有限公司 摄像镜头
CN108873254A (zh) * 2018-07-05 2018-11-23 浙江舜宇光学有限公司 光学成像系统
CN111025563A (zh) * 2019-12-26 2020-04-17 瑞声通讯科技(常州)有限公司 摄像光学镜头
CN111221104A (zh) * 2019-12-26 2020-06-02 瑞声通讯科技(常州)有限公司 摄像光学镜头
CN111505810A (zh) * 2020-07-02 2020-08-07 瑞声通讯科技(常州)有限公司 摄像光学镜头

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115097605A (zh) * 2022-07-09 2022-09-23 苏州大学 一种物像双倾斜成像光学系统及其设计方法
CN115097605B (zh) * 2022-07-09 2023-06-06 苏州大学 一种物像双倾斜成像光学系统及其设计方法
CN117289437A (zh) * 2023-11-27 2023-12-26 江西联创电子有限公司 光学镜头
CN117289437B (zh) * 2023-11-27 2024-03-08 江西联创电子有限公司 光学镜头

Also Published As

Publication number Publication date
JP7079296B2 (ja) 2022-06-01
CN111505812A (zh) 2020-08-07
JP2022022935A (ja) 2022-02-07
CN111505812B (zh) 2020-10-13
US11835685B2 (en) 2023-12-05
US20220003966A1 (en) 2022-01-06

Similar Documents

Publication Publication Date Title
WO2022021453A1 (zh) 摄像光学镜头
WO2022000658A1 (zh) 摄像光学镜头
WO2022000647A1 (zh) 摄像光学镜头
WO2022007028A1 (zh) 摄像光学镜头
WO2022000659A1 (zh) 摄像光学镜头
WO2021253516A1 (zh) 摄像光学镜头
WO2022007027A1 (zh) 摄像光学镜头
WO2022041391A1 (zh) 摄像光学镜头
WO2021253515A1 (zh) 摄像光学镜头
WO2022021457A1 (zh) 摄像光学镜头
WO2022021456A1 (zh) 摄像光学镜头
WO2022007022A1 (zh) 摄像光学镜头
WO2021168881A1 (zh) 摄像光学镜头
WO2022032827A1 (zh) 摄像光学镜头
WO2022021455A1 (zh) 摄像光学镜头
WO2022126700A1 (zh) 摄像光学镜头
WO2021168882A1 (zh) 摄像光学镜头
WO2020134277A1 (zh) 摄像光学镜头
WO2022134176A1 (zh) 摄像光学镜头
WO2022134178A1 (zh) 摄像光学镜头
WO2022134183A1 (zh) 摄像光学镜头
WO2022134177A1 (zh) 摄像光学镜头
WO2022021458A1 (zh) 摄像光学镜头
WO2022032826A1 (zh) 摄像光学镜头
WO2022032828A1 (zh) 摄像光学镜头

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20943106

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20943106

Country of ref document: EP

Kind code of ref document: A1