WO2022016624A1 - 摄像光学镜头 - Google Patents

摄像光学镜头 Download PDF

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Publication number
WO2022016624A1
WO2022016624A1 PCT/CN2020/107657 CN2020107657W WO2022016624A1 WO 2022016624 A1 WO2022016624 A1 WO 2022016624A1 CN 2020107657 W CN2020107657 W CN 2020107657W WO 2022016624 A1 WO2022016624 A1 WO 2022016624A1
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Prior art keywords
lens
imaging optical
optical lens
curvature
focal length
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PCT/CN2020/107657
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English (en)
French (fr)
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朱峰
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常州市瑞泰光电有限公司
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Publication of WO2022016624A1 publication Critical patent/WO2022016624A1/zh

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    • 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 -
    • G02B9/60—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having five components only
    • 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
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces

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 lenses traditionally mounted on mobile phone cameras mostly adopt a three-piece or four-piece lens structure.
  • the pixel area of the photosensitive device is continuously reduced, and the system's requirements for imaging quality are constantly improving.
  • the five-piece lens structure gradually appears in the lens design.
  • the five-piece lens has good optical performance, its optical power, lens spacing and lens shape setting are still unreasonable, resulting in the lens structure having good optical performance, it cannot meet the requirements of large aperture, Wide-angle, ultra-thin design requirements.
  • the purpose of the present invention is to provide an imaging optical lens, which aims to solve the problems of insufficient large aperture, wide-angle and ultra-thinning of the traditional imaging optical lens.
  • an imaging optical lens the imaging optical lens includes a total of five lenses, and the five lenses are sequentially from the object side to the image side: a first lens with a positive refractive power, a positive refractive index a second lens with power, a third lens with negative refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power;
  • the focal length of the first lens is f1
  • the focal length of the second lens is f2
  • 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 on-axis thickness of the third lens is d5
  • the on-axis distance from the image side of the third lens to the object side of the fourth lens is d6, and the following relationship is satisfied: 1.20 ⁇ f2/f1 ⁇ 7.00; 1.50 ⁇ R6/R5 ⁇ 5.00; 1.20 ⁇ d5/d6 ⁇ 2.00.
  • the focal length of the fourth lens is f4
  • the focal length of the fifth lens is f5, and satisfies the following relationship: -2.00 ⁇ f4/f5 ⁇ -0.80.
  • the overall focal length of the imaging optical lens is f
  • 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 radius of curvature of the first lens is R2.
  • the thickness on the axis is d1
  • the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: 0.54 ⁇ f1/f ⁇ 1.76; -3.62 ⁇ (R1+R2)/(R1-R2) ⁇ -0.94; 0.04 ⁇ d1/TTL ⁇ 0.19.
  • the overall focal length of the imaging optical lens is f
  • 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, and the radius of curvature of the second lens is R4.
  • the thickness on the axis is d3, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: 0.84 ⁇ f2/f ⁇ 11.93; 0.81 ⁇ (R3+R4)/(R3-R4) ⁇ 8.48; 0.05 ⁇ d3 /TTL ⁇ 0.16.
  • the overall focal length of the imaging optical lens is f
  • the focal length of the third lens is f3
  • the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: -5.02 ⁇ f3/f ⁇ -0.96 ;-6.41 ⁇ (R5+R6)/(R5-R6) ⁇ -1.03; 0.05 ⁇ d5/TTL ⁇ 0.16.
  • 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 curvature of the image side of the fourth lens The radius 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: 0.33 ⁇ f4/f ⁇ 34.54;-98.43 ⁇ (R7+R8)/ (R7-R8) ⁇ 1.19; 0.04 ⁇ d7/TTL ⁇ 0.21.
  • the overall focal length of the imaging optical lens is f
  • the focal length of the fifth lens is f5
  • the central curvature radius of the object side of the fifth lens is R9
  • the central curvature of the image side of the fifth lens The radius 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: -23.57 ⁇ f5/f ⁇ -0.36; 0.63 ⁇ (R9+R10) /(R9-R10) ⁇ 10.48; 0.05 ⁇ d9/TTL ⁇ 0.25.
  • the total optical length of the imaging optical lens is TTL
  • the image height of the imaging optical lens is IH
  • the following relational formula is satisfied: TTL/IH ⁇ 1.40.
  • the field of view of the imaging optical lens is FOV, and satisfies the following relationship: FOV ⁇ 86°.
  • the aperture value of the imaging optical lens is FNO, and satisfies the following relational formula: FNO ⁇ 2.50.
  • the imaging optical lens provided by the invention meets the design requirements of large aperture, wide-angle and ultra-thinization while having good optical performance, and is especially suitable for mobile phone camera lens assemblies composed of high-pixel CCD, CMOS and other imaging elements. WEB camera lens.
  • 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 axial aberration schematic diagram of the imaging optical lens shown in Fig. 1;
  • FIG. 3 is a schematic diagram of the magnification chromatic aberration of the imaging optical lens shown in FIG. 1;
  • FIG. 4 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 1;
  • FIG. 5 is a schematic structural diagram of an imaging optical lens according to a second embodiment of the present invention.
  • Fig. 6 is the axial aberration schematic diagram of the imaging optical lens shown in Fig. 5;
  • FIG. 7 is a schematic diagram of the chromatic aberration of magnification of the imaging optical lens shown in FIG. 5;
  • FIG. 8 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 5;
  • FIG. 9 is a schematic structural diagram of an imaging optical lens according to a third embodiment of the present invention.
  • FIG. 10 is a schematic diagram of the axial aberration of the imaging optical lens shown in FIG. 9;
  • FIG. 11 is a schematic diagram of the magnification chromatic aberration of the imaging optical lens shown in FIG. 9;
  • FIG. 12 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 9 .
  • the present invention provides the imaging optical lens 10 of the first embodiment.
  • the left side is the object side
  • the right side is the image side.
  • the imaging optical lens 10 mainly includes five lenses, from the object side to the image side, the aperture S1, the first lens L1, the second lens L2, the third lens Lens L3, fourth lens L4 and fifth lens L5.
  • An optical element such as an optical filter GF or a glass plate may be disposed between the fifth lens L5 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.
  • each lens may also be made of other materials.
  • the first lens L1 has positive refractive power
  • the second lens L2 has positive refractive power
  • the third lens L3 has negative refractive power
  • the fourth lens L4 has positive refractive power
  • the fifth lens L5 has negative refractive power .
  • the focal length of the first lens L1 as f1
  • the focal length of the second lens L2 as f2
  • the central radius of curvature of the object side surface of the third lens L3 as R5
  • the third lens The central radius of curvature of the image side of L3 is R6, the on-axis thickness of the third lens L3 is d5, the on-axis distance from the image side of the third lens L3 to the object side of the fourth lens L4 is d6, Satisfy the following relation:
  • conditional formula (1) specifies the ratio of the focal length of the second lens to the focal length of the first lens, which is helpful to improve the performance of the optical system within the range of the conditional formula.
  • 1.33 ⁇ f2/f1 ⁇ 6.89 is satisfied.
  • Conditional formula (2) specifies the shape of the third lens, and within the range specified by the conditional formula, the degree of deflection of light passing through the lens can be eased, and aberrations can be effectively reduced. Preferably, 1.70 ⁇ R6/R5 ⁇ 4.85 is satisfied.
  • Conditional expression (3) When d5/d6 satisfies the conditional expression, it is beneficial to lens processing and lens assembly.
  • the focal length of the fourth lens L4 is defined as f4, and the focal length of the fifth lens L5 is f5, which satisfies the following relationship: -2.00 ⁇ f4/f5 ⁇ -0.80, which specifies the difference between the focal length of the fourth lens and the focal length of the fifth lens.
  • the ratio within the range of the conditional formula, can effectively improve the imaging quality of the system.
  • the object side surface of the first lens L1 is a convex surface at the paraxial position
  • the image side surface is a concave surface at the paraxial position
  • the overall focal length of the imaging optical lens 10 as f
  • the focal length of the first lens L1 as f1
  • the first lens has an appropriate positive 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.
  • 0.87 ⁇ f1/f ⁇ 1.41 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: -3.62 ⁇ (R1+R2)/(R1-R2) ⁇ -0.94
  • 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.
  • -2.26 ⁇ (R1+R2)/(R1-R2) ⁇ -1.18 is satisfied.
  • the axial thickness of the first lens L1 is d1
  • the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relational formula: 0.04 ⁇ d1/TTL ⁇ 0.19, which is within the range of the conditional formula, which is conducive to realizing ultra-thinning.
  • 0.07 ⁇ d1/TTL ⁇ 0.16 is satisfied.
  • the object side surface of the second lens L2 is concave at the paraxial position, and the image side surface is convex at the paraxial position.
  • the focal length of the second lens L2 is defined as f2, and the overall focal length of the imaging optical lens 10 is f, which satisfies the following relationship: 0.84 ⁇ f2/f ⁇ 11.93.
  • 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: 0.81 ⁇ (R3+R4)/(R3-R4) ⁇ 8.48, which specifies When the shape of the second lens L2 is within the range, as the lens becomes ultra-thin and wide-angle, it is beneficial to correct the problem of axial chromatic aberration. Preferably, 1.29 ⁇ (R3+R4)/(R3-R4) ⁇ 6.78 is satisfied.
  • the axial 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 relational formula: 0.05 ⁇ d3/TTL ⁇ 0.16, within the range of the conditional formula, is conducive to realizing ultra-thinning.
  • 0.08 ⁇ d3/TTL ⁇ 0.13 is satisfied.
  • the object side surface of the third lens L3 is concave at the paraxial position, and 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: -5.02 ⁇ f3/f ⁇ -0.96, through the reasonable distribution of focal power, the system has better imaging quality and lower sensitivity.
  • -5.02 ⁇ f3/f ⁇ -0.96 through the reasonable distribution of focal power, the system has better imaging quality and lower sensitivity.
  • -3.14 ⁇ f3/f ⁇ -1.20 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: -6.41 ⁇ (R5+R6)/(R5-R6) ⁇ -1.03, which specifies According to the shape of the third lens, within the range specified by the conditional expression, the degree of deflection of the light passing through the lens can be alleviated, and the aberration can be effectively reduced. Preferably, -4.00 ⁇ (R5+R6)/(R5-R6) ⁇ -1.28 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 expression: 0.05 ⁇ d5/TTL ⁇ 0.16, within the range of the conditional expression, is conducive to realizing ultra-thinning. Preferably, 0.07 ⁇ d5/TTL ⁇ 0.13 is satisfied.
  • the object side surface of the fourth lens L4 is convex at the paraxial position, and the image side surface is convex 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: 0.33 ⁇ f4/f ⁇ 34.54, which specifies the ratio of the focal length of the fourth lens to the system focal length, which is within the range of the conditional expression Helps improve optical system performance.
  • 0.52 ⁇ f4/f ⁇ 27.63 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: -98.43 ⁇ (R7+R8)/(R7-R8) ⁇ 1.19, which specifies
  • -98.43 ⁇ (R7+R8)/(R7-R8) ⁇ 1.19 which specifies
  • -61.52 ⁇ (R7+R8)/(R7-R8) ⁇ 0.95 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: 0.04 ⁇ d7/TTL ⁇ 0.21, which is within the range of the conditional formula, which is conducive to realizing ultra-thinning.
  • 0.07 ⁇ d7/TTL ⁇ 0.17 is satisfied.
  • the object side surface of the fifth lens L5 is a convex surface at the paraxial position
  • the image side surface is a concave surface at the paraxial position
  • the focal length f5 of the fifth lens L5 is f, which satisfies the following relationship: -23.57 ⁇ f5/f ⁇ -0.36, the limitation of the fifth lens L5 can effectively make the light angle of the imaging lens gentle, Reduce tolerance sensitivity.
  • -14.73 ⁇ f5/f ⁇ -0.45 is satisfied.
  • the central radius of curvature of the object side of the fifth lens L5 is R9
  • the central radius of curvature of the image side of the fifth lens L5 is R10
  • the following relationship is satisfied: 0.63 ⁇ (R9+R10)/(R9-R10) ⁇ 10.48, which specifies When the shape of the fifth lens L5 is within the range, along with the development of ultra-thin and wide-angle, it is beneficial to correct problems such as aberrations of off-axis picture angles.
  • 1.00 ⁇ (R9+R10)/(R9-R10) ⁇ 8.39 is satisfied.
  • the axial 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: 0.05 ⁇ d9/TTL ⁇ 0.25, within the range of the conditional formula, is conducive to realizing ultra-thinning.
  • 0.08 ⁇ d9/TTL ⁇ 0.20 is satisfied.
  • the aperture value FNO of the imaging optical lens 10 is less than or equal to 2.50, thereby realizing a large aperture.
  • the field of view FOV of the imaging optical lens 10 is greater than or equal to 86°, thereby achieving a wider angle.
  • the total optical length of the imaging optical lens 10 is TTL
  • the image height of the imaging optical lens 10 is IH, which satisfies TTL/IH ⁇ 1.40, thereby achieving ultra-thinning.
  • the imaging optical lens 10 can have good optical performance, and can meet the requirements of large aperture, wide angle, and ultra-thinning According to the characteristics of the imaging optical lens 10, the imaging optical lens 10 is especially suitable for mobile phone camera lens assemblies and WEB camera lenses composed of high-pixel CCD, CMOS and other imaging elements.
  • the surface of each lens can be set as an aspherical surface, and the aspherical surface can be easily made into a shape other than a spherical surface, so as to obtain more control variables to reduce aberrations, thereby reducing the use of lenses Therefore, the total length of the imaging optical lens 10 can be effectively reduced.
  • the object side surface and the image side surface of each lens are both aspherical surfaces.
  • the imaging optical lens 10 can be reasonably The power, spacing, and shape of each lens are assigned, and various types of aberrations are corrected accordingly.
  • 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 unit of focal length, on-axis distance, center curvature radius, on-axis thickness, inflection point position, and stagnation point position is mm.
  • TTL total optical length (the on-axis distance from the object side of the first lens L1 to the image plane Si), 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.
  • At least one of the object side surface and the image side surface of each lens may also be provided with an inflection point and/or a stagnation point to meet high-quality imaging requirements. For specific implementations, see below.
  • the design data of the imaging optical lens 10 shown in FIG. 1 is shown below.
  • Table 1 lists the center curvature radius of the object side surface and the center curvature radius R of the image side surface of the first lens L1 to the optical filter GF constituting the imaging optical lens 10 in the first embodiment of the present invention, the axial thickness of each lens, and the adjacent The distance d between the two lenses, the refractive index nd and the Abbe number ⁇ d. It should be noted that, in this embodiment, the units of R and d are both millimeters (mm).
  • R the radius of curvature at the center of the optical surface
  • R1 the central radius of curvature of the object side surface of the first lens L1;
  • R2 the central curvature radius of the image side surface of the first lens L1;
  • R3 the central radius of curvature of the object side surface of the second lens L2;
  • R4 the central curvature radius of the image side surface of the second lens L2;
  • R5 the central radius of curvature of the object side surface of the third lens L3;
  • R6 the central curvature radius of the image side surface of the third lens L3;
  • R7 the central curvature radius of the object side surface of the fourth lens L4;
  • R8 the central curvature radius of the image side surface of the fourth lens L4;
  • R9 the central curvature radius of the object side surface of the fifth lens L5;
  • R10 the central curvature radius of the image side surface of the fifth lens L5;
  • R11 the central curvature radius of the object side of the optical filter GF
  • R12 the central 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 optical filter GF
  • d11 the on-axis thickness of the optical filter GF
  • d12 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;
  • 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 a conic coefficient
  • A4, A6, A8, A10, A12, A14, A16, A18, and A20 are aspheric coefficients.
  • x is the vertical distance between the point on the aspheric curve and the optical axis
  • y is the aspheric depth (the vertical distance between the point on the aspheric surface that is x from the optical axis and the tangent plane tangent to the vertex on the aspheric optical axis ).
  • the aspherical surface shown in the above formula (4) is used as the aspherical surface of each lens surface.
  • the present invention is not limited to the aspheric polynomial form represented by this formula (4).
  • Table 3 and Table 4 show the design data of the inflection point and the stagnation point of each lens in the imaging optical lens 10 of the present embodiment.
  • P1R1 and P1R2 respectively represent the object side and image side of the first lens L1
  • P2R1 and P2R2 respectively represent the object side and image side of the second lens L2
  • P3R1 and P3R2 respectively represent the object side and the image side of the third lens L3
  • P4R1 and P4R2 respectively represent the object side and the image side of the fourth lens L4
  • P5R1 and P5R2 respectively represent the object side and the image side of the fifth lens L5.
  • the corresponding data in the column of "invagination point position” is the vertical distance from the inflexion point set on the surface of each lens to the optical axis of the imaging optical lens 10 .
  • the corresponding data in the column of "stagnation point position” is the vertical distance from the stagnation point set on the surface of each lens to the optical axis of the imaging optical lens 10 .
  • the first embodiment satisfies each conditional expression.
  • FIG. 4 shows a schematic diagram of field curvature and distortion after light with a wavelength of 546 nm passes through the imaging optical lens 10 .
  • the field curvature S in FIG. 4 is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.
  • the entrance pupil diameter ENPD of the imaging optical lens 10 is 1.369 mm
  • the full field of view image height IH is 3.282 mm
  • the FOV in the diagonal direction is 89.80°.
  • Aperture, wide-angle, ultra-thin design requirements, its on-axis and off-axis chromatic aberrations are fully corrected, and has excellent optical characteristics.
  • FIG. 5 is a schematic diagram of the structure of the imaging optical lens 20 in the second embodiment.
  • the second embodiment is basically the same as the first embodiment, and the symbols in the following list have the same meaning as the first embodiment, so the same parts will not be repeated here. To repeat, only the differences are listed below.
  • the image side surface of the fourth lens L4 is concave at the paraxial position.
  • Tables 5 and 6 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.
  • Table 6 shows aspherical surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.
  • Tables 7 and 8 show the design data of the inflection point and the stagnation point of each lens in the imaging optical lens 20 .
  • FIG. 6 and 7 respectively show schematic diagrams of axial aberration and magnification chromatic aberration of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 nm after passing through the imaging optical lens 20 .
  • FIG. 8 shows a schematic diagram of field curvature and distortion after light with a wavelength of 546 nm passes through the imaging optical lens 20 .
  • the field curvature S in FIG. 8 is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.
  • the entrance pupil diameter ENPD of the imaging optical lens 20 is 1.380 mm
  • the full field of view image height IH is 3.282 mm
  • the FOV in the diagonal direction is 86.40°.
  • Aperture, wide-angle, ultra-thin design requirements, its on-axis and off-axis chromatic aberrations are fully corrected, and has excellent optical characteristics.
  • FIG. 9 is a schematic diagram of the structure of the imaging optical lens 30 in the third embodiment.
  • the third embodiment is basically the same as the first embodiment, and the symbols in the following list have the same meanings as the first embodiment, so the same parts are omitted here. To repeat, only the differences are listed below.
  • the image side surface of the fourth lens L4 is concave at the paraxial position.
  • Table 9 and Table 10 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.
  • Table 10 shows aspherical surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.
  • Table 11 and Table 12 show the design data of the inflection point and the stagnation point of each lens in the imaging optical lens 30 .
  • FIG. 10 and 11 respectively show schematic diagrams of axial aberration and magnification chromatic aberration of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 nm after passing through the imaging optical lens 30 .
  • FIG. 12 shows a schematic diagram of field curvature and distortion after light with a wavelength of 546 nm passes through the imaging optical lens 30 .
  • the field curvature S in FIG. 12 is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.
  • the entrance pupil diameter ENPD of the imaging optical lens 30 is 1.406 mm
  • the full field of view image height IH is 3.282 mm
  • the field of view angle FOV in the diagonal direction is 86.00°.
  • the imaging optical lens 30 It meets the design requirements of large aperture, wide-angle, and ultra-thin, and its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.
  • Example 1 Example 2
  • Example 3 f2/f1 1.47 6.79 3.80
  • R6/R5 1.91 3.86 4.70 d5/d6 1.74 1.29 1.91 f 3.218 3.382 3.446 f1 3.668 3.963 3.755 f2 5.385 26.889 14.271 f3 -4.632 -6.996 -8.653 f4 2.100 4.108 79.349 f5 -1.733 -4.668 -40.608 FNO 2.35 2.45 2.45 TTL 4.329 4.530 4.520 FOV 89.80° 86.40° 86.00° IH 3.282 3.282 3.282

Abstract

一种摄像光学镜头（10、 20、 30），摄像光学镜头（10、 20、 30）共包含五片透镜，五片透镜由物侧至像侧依次为：具有正屈折力的第一透镜（L1）、具有正屈折力的第二透镜（L2）、具有负屈折力的第三透镜（L3）、具有正屈折力的第四透镜（L4）及具有负屈折力的第五透镜（L5）；其中，第一透镜（L1）的焦距为f1，第二透镜（L2）的焦距为f2，第三透镜（L3）的物侧面的中心曲率半径为R5，第三透镜（L3）的像侧面的中心曲率半径为R6，第三透镜（L3）的轴上厚度为d5，第三透镜（L3）的像侧面到第四透镜（L4）的物侧面的轴上距离为d6，且满足下列关系式：1.20≤f2/f1≤7.00；1.50≤R6/R5≤5.00；1.20≤d5/d6≤2.00。摄像光学镜头（10、 20、 30）在具有良好的光学性能的同时，还满足大光圈、广角化、超薄化的设计要求。

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
近年来，随着智能手机的兴起，小型化摄影镜头的需求日渐提高，而一般摄影镜头的感光器件不外乎是感光耦合器件(Charge Coupled Device，CCD)或互补性氧化金属半导体器件(Complementary Metal-Oxide Semiconductor Sensor，CMOS Sensor)两种，且由于半导体制造工艺技术的精进，使得感光器件的像素尺寸缩小，再加上现今电子产品以功能佳且轻薄短小的外型为发展趋势，因此，具备良好成像品质的小型化摄像镜头俨然成为目前市场上的主流。
为获得较佳的成像品质，传统搭载于手机相机的镜头多采用三片式、或四片式透镜结构。然而，随着技术的发展以及用户多样化需求的增多，在感光器件的像素面积不断缩小，且系统对成像品质的要求不断提高的情况下，五片式透镜结构逐渐出现在镜头设计当中，常见的五片式透镜虽然已经具有较好的光学性能，但是其光焦度、透镜间距和透镜形状设置仍然具有一定的不合理性，导致透镜结构在具有良好光学性能的同时，无法满足大光圈、广角化、超薄化的设计要求。
因此，有必要提供一种具有良好的光学性能且满足大光圈、广角化、超薄化设计要求的摄像光学镜头。
发明内容
本发明的目的在于提供一种摄像光学镜头，旨在解决传统的摄像光学镜头大光圈、广角化、超薄化不充分的问题。
本发明的技术方案如下：一种摄像光学镜头，所述摄像光学镜头共包含五片透镜，五片所述透镜由物侧至像侧依次为：具有正屈折力的第一透镜、具有正屈折力的第二透镜、具有负屈折力的第三透镜、具有正屈折力的第四透镜及具有负屈折力的第五透镜；
其中，所述第一透镜的焦距为f1，所述第二透镜的焦距为f2，所述第三透镜的物侧面的中心曲率半径为R5，所述第三透镜的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，所述第三透镜的像侧面到所述第四透镜的物侧面的轴上距离为d6，且满足下列关系式：1.20≤f2/f1≤7.00；1.50≤R6/R5≤5.00；1.20≤d5/d6≤2.00。
优选地，所述第四透镜的焦距为f4，所述第五透镜的焦距为f5，且满足下列关系式：-2.00≤f4/f5≤-0.80。
优选地，所述摄像光学镜头整体的焦距为f，所述第一透镜的物侧面的中心曲率半径为R1，所述第一透镜的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：0.54≤f1/f≤1.76；-3.62≤(R1+R2)/(R1-R2)≤-0.94；0.04≤d1/TTL≤0.19。
优选地，所述摄像光学镜头整体的焦距为f，所述第二透镜的物侧面的中心曲率半径为R3，所述第二透镜的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：0.84≤f2/f≤11.93；0.81≤(R3+R4)/(R3-R4)≤8.48；0.05≤d3/TTL≤0.16。
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，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：-5.02≤f3/f≤-0.96；-6.41≤(R5+R6)/(R5-R6)≤-1.03；0.05≤d5/TTL≤0.16。
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，所述第四透镜的物侧面的中心曲率半径为R7，所述第四透镜的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：0.33≤f4/f≤34.54；-98.43≤(R7+R8)/(R7-R8)≤1.19；0.04≤d7/TTL≤0.21。
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，所述第五透镜的物侧面的中心曲率半径为R9，所述第五透镜的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：-23.57≤f5/f≤-0.36；0.63≤(R9+R10)/(R9-R10)≤10.48；0.05≤d9/TTL≤0.25。
优选地，所述摄像光学镜头的光学总长为TTL，所述摄像光学镜头的像高为IH，且满足下列关系式：TTL/IH≤1.40。
优选地，所述摄像光学镜头的视场角为FOV，且满足下列关系式：FOV≥86°。
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≤2.50。
本发明的有益效果在于：
本发明提供的摄像光学镜头在具有良好光学性能的同时，满足大光圈、广角化和超薄化的设计要求,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所示的摄像光学镜头的轴向像差示意图；
图3是图1所示的摄像光学镜头的倍率色差示意图；
图4是图1所示的摄像光学镜头的场曲及畸变示意图；
图5是本发明第二实施方式的摄像光学镜头的结构示意图；
图6是图5所示的摄像光学镜头的轴向像差示意图；
图7是图5所示的摄像光学镜头的倍率色差示意图；
图8是图5所示的摄像光学镜头的场曲及畸变示意图；
图9是本发明第三实施方式的摄像光学镜头的结构示意图；
图10是图9所示的摄像光学镜头的轴向像差示意图；
图11是图9所示的摄像光学镜头的倍率色差示意图；
图12是图9所示的摄像光学镜头的场曲及畸变示意图。
具体实施方式
下面结合附图和实施方式对本发明作进一步说明。
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)
请一并参阅图1至图4，本发明提供了第一实施方式的摄像光学镜头10。在图1中，左侧为物侧，右侧为像侧，摄像光学镜头10主要包括五个透镜，从物侧至像侧依次为光圈S1、第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4及第五透镜L5。第五透镜L5和像面Si之间可设置有光学过滤片(filter)GF或玻璃平板等光学元件。
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。在其他实施例中，各透镜也可以是其他材质。
在本实施方式中，第一透镜L1具有正屈折力，第二透镜L2具有正屈折力，第三透镜L3具有负屈折力，第四透镜L4具有正屈折力，第五透镜L5具有负屈折力。
在本实施方式中，定义所述第一透镜L1的焦距为f1，所述第二透镜L2的焦距为f2，所述第三透镜L3的物侧面的中心曲率半径为R5，所述第三透镜L3的像侧面的中心曲率半径为R6，所述第三透镜L3的轴上厚度为d5，所述第三透镜L3的像侧面到所述第四透镜L4的物侧面的轴上距离为d6，满足下列关系式：
1.20≤f2/f1≤7.00     (1)
1.50≤R6/R5≤5.00      (2)
1.20≤d5/d6≤2.00      (3)
其中，条件式(1)规定了第二透镜焦距与第一透镜焦距的比值，在条件式范围内有助于提高光学系统性能。优选地，满足1.33≤f2/f1≤6.89。
条件式(2)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1.70≤R6/R5≤4.85。
条件式(3)当d5/d6满足条件式，有利于镜片加工和镜头组装。
定义所述第四透镜L4的焦距为f4，所述第五透镜L5的焦距为f5，满足下列关系式：-2.00≤f4/f5≤-0.80，规定了第四透镜焦距与第五透镜焦距的比值，在条件式范围内，可有效提高系统成像质量。
本实施方式中，第一透镜L1的物侧面于近轴处为凸面，像侧面于近轴处为凹面。
定义摄像光学镜头10整体的焦距为f，第一透镜L1的焦距为f1，满足下列关系式：0.54≤f1/f≤1.76，规定了第一透镜的焦距与摄像光学镜头整体的焦距的比值，在规定的范围内时，第一透镜具有适当的正屈折力，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0.87≤f1/f≤1.41。
第一透镜L1的物侧面的中心曲率半径为R1，第一透镜L1的像侧面的中心曲率半径为R2，满足下列关系式：-3.62≤(R1+R2)/(R1-R2)≤-0.94，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-2.26≤(R1+R2)/(R1-R2)≤-1.18。
第一透镜L1的轴上厚度为d1，摄像光学镜头10的光学总长为TTL，满足下列关系式：0.04≤d1/TTL≤0.19，在条件式范围内，有利于实现超薄化。优选地，满足0.07≤d1/TTL≤0.16。
本实施方式中，第二透镜L2的物侧面于近轴处为凹面，像侧面于近轴处为凸面。
定义第二透镜L2的焦距为f2，摄像光学镜头10整体的焦距为f，满足下列关系式：0.84≤f2/f≤11.93，通过将第二透镜L2的正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1.34≤f2/f≤9.54。
第二透镜L2的物侧面的中心曲率半径为R3，第二透镜L2的像侧面的中心曲率半径为R4，满足下列关系式：0.81≤(R3+R4)/(R3-R4)≤8.48，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1.29≤(R3+R4)/(R3-R4)≤6.78。
第二透镜L2的轴上厚度为d3，摄像光学镜头10的光学总长为TTL，满足下列关系式：0.05≤d3/TTL≤0.16，在条件式范围内，有利于实现超薄化。优选地，满足0.08≤d3/TTL≤0.13。
本实施方式中，第三透镜L3的物侧面于近轴处为凹面，像侧面于近轴处为凸面。
定义第三透镜L3的焦距为f3，摄像光学镜头10整体的焦距为f，满足下列关系式：-5.02≤f3/f≤-0.96，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-3.14≤f3/f≤-1.20。
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：-6.41≤(R5+R6)/(R5-R6)≤-1.03，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-4.00≤(R5+R6)/(R5-R6)≤-1.28。
第三透镜L3的轴上厚度为d5，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≤0.16，在条件式范围内，有利于实现超薄化。优选地，满足0.07≤d5/TTL≤0.13。
本实施方式中，第四透镜L4的物侧面于近轴处为凸面，像侧面于近轴处为凸面。
定义第四透镜L4的焦距为f4，摄像光学镜头10整体的焦距为f，满足下列关系式：0.33≤f4/f≤34.54，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0.52≤f4/f≤27.63。
第四透镜L4物侧面的中心曲率半径为R7，第四透镜L4像侧面的中心曲率半径为R8，满足下列关系式：-98.43≤(R7+R8)/(R7-R8)≤1.19，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-61.52≤(R7+R8)/(R7-R8)≤0.95。
第四透镜L4的轴上厚度为d7，摄像光学镜头10的光学总长为TTL，满足下列关系式：0.04≤d7/TTL≤0.21，在条件式范围内，有利于实现超薄化。优选地，满足0.07≤d7/TTL≤0.17。
本实施方式中，第五透镜L5的物侧面于近轴处为凸面，像侧面于近轴处为凹面。
定义第五透镜L5焦距f5，摄像光学镜头整体的焦距为f，满足下列关系式：-23.57≤ f5/f≤-0.36，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-14.73≤f5/f≤-0.45。
第五透镜L5物侧面的中心曲率半径为R9，第五透镜L5像侧面的中心曲率半径为R10，且满足下列关系式：0.63≤(R9+R10)/(R9-R10)≤10.48，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1.00≤(R9+R10)/(R9-R10)≤8.39。
第五透镜L5的轴上厚度为d9，摄像光学镜头10的光学总长为TTL，满足下列关系式：0.05≤d9/TTL≤0.25，在条件式范围内，有利于实现超薄化。优选地，满足0.08≤d9/TTL≤0.20。
在本实施方式中，摄像光学镜头10的光圈值FNO小于或等于2.50，从而实现大光圈。
本实施方式中，摄像光学镜头10的视场角FOV大于或等于86°，从而实现广角化。
本实施方式中，摄像光学镜头10的光学总长为TTL，摄像光学镜头10的像高为IH，满足TTL/IH≤1.40，从而实现超薄化。
当本发明所述摄像光学镜头10的焦距、各透镜的焦距和中心曲率半径满足上述关系式时，可以使摄像光学镜头10具有良好光学性能，同时能够满足了大光圈、广角化、超薄化的设计要求；根据该摄像光学镜头10的特性，该摄像光学镜头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。
此外，本实施方式提供的摄像光学镜头10中，各透镜的表面可以设置为非球面，非球面容易制作成球面以外的形状，获得较多的控制变数，用以消减像差，进而缩减透镜使用的数目，因此可以有效降低摄像光学镜头10的总长度。在本实施方式中，各个透镜的物侧面和像侧面均为非球面。
值得一提的是，由于第一透镜L1、第二透镜L2、第三透镜L3、第四透镜L4、第五透镜L5具有如前所述的结构和参数关系，因此，摄像光学镜头10能够合理分配各透镜的光焦度、间隔和形状，并因此校正了各类像差。
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、中心曲率半径、轴上厚度、反曲点位置、驻点位置的单位为mm。
TTL：光学总长(第一透镜L1的物侧面到像面Si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。
另外，各透镜的物侧面和像侧面中的至少一个上还可以设置有反曲点和/或驻点，以满足高品质的成像需求，具体的可实施方案，参下所述。
以下示出了图1所示的摄像光学镜头10的设计数据。
表1列出了本发明第一实施方式中构成摄像光学镜头10的第一透镜L1～光学过滤片GF的物侧面中心曲率半径和像侧面中心曲率半径R、各透镜的轴上厚度以及相邻两透镜间的距离d、折射率nd及阿贝数νd。需要说明的是，本实施方式中，R与d的单位均为毫米(mm)。
【表1】
Figure PCTCN2020107657-appb-000001
Figure PCTCN2020107657-appb-000002
上表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的物侧面的中心曲率半径；
R2：第一透镜L1的像侧面的中心曲率半径；
R3：第二透镜L2的物侧面的中心曲率半径；
R4：第二透镜L2的像侧面的中心曲率半径；
R5：第三透镜L3的物侧面的中心曲率半径；
R6：第三透镜L3的像侧面的中心曲率半径；
R7：第四透镜L4的物侧面的中心曲率半径；
R8：第四透镜L4的像侧面的中心曲率半径；
R9：第五透镜L5的物侧面的中心曲率半径；
R10：第五透镜L5的像侧面的中心曲率半径；
R11：光学过滤片GF的物侧面的中心曲率半径；
R12：光学过滤片GF的像侧面的中心曲率半径；
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的像侧面到光学过滤片GF的物侧面的轴上距离；d11：光学过滤片GF的轴上厚度；
d12：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；
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；
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 PCTCN2020107657-appb-000003
Figure PCTCN2020107657-appb-000004
在表2中，k是圆锥系数，A4、A6、A8、A10、A12、A14、A16、A18、A20是非球面系数。
y＝(x 2/R)/{1+[1-(k+1)(x 2/R 2)] 1/2}+A4x 4+A6x 6+A8x 8+A10x 10+A12x 12+A14x 14+A16x 16+A18x 18+A20x 20      (4)
其中，x是非球面曲线上的点与光轴的垂直距离，y是非球面深度(非球面上距离光轴为x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(4)中所示的非球面。但是,本发明不限于该公式(4)表示的非球面多项式形式。
表3、表4示出本实施例的摄像光学镜头10中各透镜的反曲点以及驻点设计数据。其中，P1R1、P1R2分别代表第一透镜L1的物侧面和像侧面，P2R1、P2R2分别代表第二透镜L2的物侧面和像侧面，P3R1、P3R2分别代表第三透镜L3的物侧面和像侧面，P4R1、P4R2分别代表第四透镜L4的物侧面和像侧面，P5R1、P5R2分别代表第五透镜L5的物侧面和像侧面。“反曲点位置”栏位对应数据为各透镜表面所设置的反曲点到摄像光学镜头10光轴的垂直距离。“驻点位置”栏位对应数据为各透镜表面所设置的驻点到摄像光学镜头10光轴的垂直距离。
【表3】
  反曲点个数 反曲点位置1 反曲点位置2 反曲点位置3
P1R1 0 / / /
P1R2 1 0.435 / /
P2R1 1 0.745 / /
P2R2 1 0.785 / /
P3R1 2 0.825 0.865 /
P3R2 2 0.875 1.195 /
P4R1 2 0.755 1.545 /
P4R2 3 0.355 1.005 2.045
P5R1 3 0.355 1.755 2.495
P5R2 3 0.525 2.535 2.745
【表4】
Figure PCTCN2020107657-appb-000005
Figure PCTCN2020107657-appb-000006
另外，在后续的表13中，还列出了第一、二、三实施方式中各种参数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。
图2、图3分别示出了波长为656nm、588nm、546nm、486nm、436nm的光经过摄像光学镜头10后的轴向像差以及倍率色差示意图。图4则示出了波长为546nm的光经过摄像光学镜头10后的场曲及畸变示意图。图4的场曲S是弧矢方向的场曲，T是子午方向的场曲。
在本实施方式中，所述摄像光学镜头10的入瞳直径ENPD为1.369mm，全视场像高IH为3.282mm，对角线方向的视场角FOV为89.80°，摄像光学镜头10满足大光圈、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)
图5是第二实施方式中摄像光学镜头20的结构示意图，第二实施方式与第一实施方式基本相同，以下列表中符号含义与第一实施方式也相同，故对于相同的部分此处不再赘述，以下仅列出不同点。
在本实施方式中，第四透镜L4的像侧面于近轴处为凹面。
表5、表6示出本发明第二实施方式的摄像光学镜头20的设计数据。
【表5】
Figure PCTCN2020107657-appb-000007
表6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6】
Figure PCTCN2020107657-appb-000008
Figure PCTCN2020107657-appb-000009
表7、表8示出摄像光学镜头20中各透镜的反曲点及驻点设计数据。
【表7】
  反曲点个数 反曲点位置1 反曲点位置2 反曲点位置3
P1R1 0 / / /
P1R2 1 0.395 / /
P2R1 0 / / /
P2R2 1 0.935 / /
P3R1 1 0.945 / /
P3R2 1 0.985 / /
P4R1 2 0.745 1.555 /
P4R2 3 0.975 1.925 2.195
P5R1 3 0.375 1.365 2.525
P5R2 3 0.545 2.495 2.695
【表8】
  驻点个数 驻点位置1 驻点位置2
P1R1 0 / /
P1R2 1 0.595 /
P2R1 0 / /
P2R2 0 / /
P3R1 0 / /
P3R2 1 1.205 /
P4R1 1 1.125 /
P4R2 1 1.395 /
P5R1 2 0.715 2.135
P5R2 1 1.355 /
另外，在后续的表13中，还列出了第二实施方式中各种参数与条件式中已规定的参数所对应的值，显然，本实施方式的摄像光学镜头满足上述的条件式。
图6、图7分别示出了波长为656nm、588nm、546nm、486nm、436nm的光经过摄像光学镜头20后的轴向像差以及倍率色差示意图。图8则示出了，波长为546nm的光经过摄像光学镜头20后的场曲及畸变示意图。图8的场曲S是弧矢方向的场曲，T是子午方向的场曲。
在本实施方式中，所述摄像光学镜头20的入瞳直径ENPD为1.380mm，全视场像高IH为3.282mm，对角线方向的视场角FOV为86.40°，摄像光学镜头20满足大光圈、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)
图9是第三实施方式中摄像光学镜头30的结构示意图，第三实施方式与第一实施方式基本相同，以下列表中符号含义与第一实施方式也相同，故对于相同的部分此处不再赘述，以下仅列出不同点。
本实施方式中，第四透镜L4的像侧面于近轴处为凹面。
表9、表10示出本发明第三实施方式的摄像光学镜头30的设计数据。
【表9】
Figure PCTCN2020107657-appb-000010
表10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10】
Figure PCTCN2020107657-appb-000011
表11、表12示出摄像光学镜头30中各透镜的反曲点及驻点设计数据。
【表11】
  反曲点个数 反曲点位置1 反曲点位置2 反曲点位置3
P1R1 1 0.695 / /
P1R2 1 0.375 / /
P2R1 1 0.865 / /
P2R2 1 0.975 / /
P3R1 1 0.985 / /
P3R2 1 1.015 / /
P4R1 3 0.745 1.455 1.585
P4R2 3 0.875 1.725 1.775
P5R1 3 0.355 1.345 2.375
P5R2 3 0.565 2.475 2.755
【表12】
   驻点个数 驻点位置1 驻点位置2 驻点位置3
P1R1 0 / / /
P1R2 1 0.565 / /
P2R1 0 / / /
P2R2 0 / / /
P3R1 0 / / /
P3R2 1 1.225 / /
P4R1 1 1.055 / /
P4R2 1 1.225 / /
P5R1 3 0.725 1.995 2.485
P5R2 1 1.405 / /
另外，在后续的表13中，还列出了第三实施方式中各种参数与条件式中已规定的参数所对应的值。显然，本实施方式的摄像光学镜头满足上述的条件式。
图10、图11分别示出了波长为656nm、588nm、546nm、486nm、436nm的光经过摄像光学镜头30后的轴向像差以及倍率色差示意图。图12则示出了，波长为546nm的光经过摄像光学镜头30后的场曲及畸变示意图。图12的场曲S是弧矢方向的场曲，T是子午方向的场曲。
在本实施方式中，所述摄像光学镜头30的入瞳直径ENPD为1.406mm，全视场像高IH为3.282mm，对角线方向的视场角FOV为86.00°，所述摄像光学镜头30满足大光圈、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】
参数及条件式 实施例1 实施例2 实施例3
f2/f1 1.47 6.79 3.80
R6/R5 1.91 3.86 4.70
d5/d6 1.74 1.29 1.91
f 3.218 3.382 3.446
f1 3.668 3.963 3.755
f2 5.385 26.889 14.271
f3 -4.632 -6.996 -8.653
f4 2.100 4.108 79.349
f5 -1.733 -4.668 -40.608
FNO 2.35 2.45 2.45
TTL 4.329 4.530 4.520
FOV 89.80° 86.40° 86.00°
IH 3.282 3.282 3.282
以上所述的仅是本发明的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出改进，但这些均属于本发明的保护范围。

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含五片透镜，五片所述透镜由物侧至像侧依次为：具有正屈折力的第一透镜、具有正屈折力的第二透镜、具有负屈折力的第三透镜、具有正屈折力的第四透镜及具有负屈折力的第五透镜；
    其中，所述第一透镜的焦距为f1，所述第二透镜的焦距为f2，所述第三透镜的物侧面的中心曲率半径为R5，所述第三透镜的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，所述第三透镜的像侧面到所述第四透镜的物侧面的轴上距离为d6，且满足下列关系式：
    1.20≤f2/f1≤7.00；
    1.50≤R6/R5≤5.00；
    1.20≤d5/d6≤2.00。
  2. 根据权利要求1所述的摄像光学镜头，其特征在于，所述第四透镜的焦距为f4，所述第五透镜的焦距为f5，且满足下列关系式：
    -2.00≤f4/f5≤-0.80。
  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，所述第一透镜的物侧面的中心曲率半径为R1，所述第一透镜的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：
    0.54≤f1/f≤1.76；
    -3.62≤(R1+R2)/(R1-R2)≤-0.94；
    0.04≤d1/TTL≤0.19。
  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，所述第二透镜的物侧面的中心曲率半径为R3，所述第二透镜的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：
    0.84≤f2/f≤11.93；
    0.81≤(R3+R4)/(R3-R4)≤8.48；
    0.05≤d3/TTL≤0.16。
  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，所述第三透镜的焦距为f3，所述摄像光学镜头的光学总长为TTL，且满足下列关系式：
    -5.02≤f3/f≤-0.96；
    -6.41≤(R5+R6)/(R5-R6)≤-1.03；
    0.05≤d5/TTL≤0.16。
  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，所述第四透镜的焦距为f4，所述第四透镜的物侧面的中心曲率半径为R7，所述第四透镜的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：
    0.33≤f4/f≤34.54；
    -98.43≤(R7+R8)/(R7-R8)≤1.19；
    0.04≤d7/TTL≤0.21。
  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， 所述第五透镜的焦距为f5，所述第五透镜的物侧面的中心曲率半径为R9，所述第五透镜的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：
    -23.57≤f5/f≤-0.36；
    0.63≤(R9+R10)/(R9-R10)≤10.48；
    0.05≤d9/TTL≤0.25。
  8. 根据权利要求1所述的摄像光学镜头，其特征在于，所述摄像光学镜头的光学总长为TTL，所述摄像光学镜头的像高为IH，且满足下列关系式：
    TTL/IH≤1.40。
  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视场角为FOV，且满足下列关系式：
    FOV≥86°。
  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圈值为FNO，且满足下列关系式：
    FNO≤2.50。
PCT/CN2020/107657 2020-07-21 2020-08-07 摄像光学镜头 WO2022016624A1 (zh)

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