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WO2020073983A1 - Ensemble lentille de photographie optique, module d'imagerie et dispositif électronique - Google Patents

Ensemble lentille de photographie optique, module d'imagerie et dispositif électronique Download PDF

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Publication number
WO2020073983A1
WO2020073983A1 PCT/CN2019/110553 CN2019110553W WO2020073983A1 WO 2020073983 A1 WO2020073983 A1 WO 2020073983A1 CN 2019110553 W CN2019110553 W CN 2019110553W WO 2020073983 A1 WO2020073983 A1 WO 2020073983A1
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WIPO (PCT)
Prior art keywords
lens
lens group
optical
object side
optical axis
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Application number
PCT/CN2019/110553
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English (en)
Chinese (zh)
Inventor
邹海荣
刘彬彬
谢晗
Original Assignee
南昌欧菲精密光学制品有限公司
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Publication of WO2020073983A1 publication Critical patent/WO2020073983A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/004—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 four lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • 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

Definitions

  • the present invention requires the application date to be October 11, 2018, and the priority of the Chinese patent application with the application number 2018111841117.
  • the invention relates to the technical field of optical imaging, in particular to an optical camera lens group, an imaging module and an electronic device.
  • an optical camera lens group an imaging module, and an electronic device are provided.
  • An optical camera lens group in order from the object side to the image side, includes:
  • a first lens with positive refractive power the object side of the first lens is convex, and the image side is concave at the optical axis;
  • a second lens with refractive power the object side of the second lens is convex at the optical axis, and the image side is concave;
  • a third lens with positive refractive power the object side of the third lens is concave, and the image side is convex;
  • a fourth lens with refractive power the object side of the fourth lens is convex at the optical axis, and the image side is concave at the optical axis;
  • optical camera lens group satisfies the following conditional formula:
  • Sd21 is the height of the maximum effective diameter of the object side of the second lens relative to the optical axis
  • Sd11 is the height of the maximum effective diameter of the object side of the first lens relative to the optical axis.
  • An imaging module includes the above-mentioned optical camera lens group and a photosensitive element, and the photosensitive element is disposed on the image side of the optical camera lens group.
  • An electronic device includes a housing and the above-mentioned imaging module, and the imaging module is mounted on the housing.
  • FIG. 1 is a schematic structural diagram of an optical camera lens group according to Embodiment 1 of the present invention.
  • FIG. 2 is a spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical imaging lens group according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic structural diagram of an optical camera lens group according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic structural diagram of an optical camera lens group according to Embodiment 3 of the present invention.
  • FIG. 6 is a spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of the optical imaging lens group according to Embodiment 3 of the present invention.
  • FIG. 7 is a schematic structural view of an optical camera lens group according to Embodiment 4 of the present invention.
  • FIG. 9 is a schematic structural view of an optical camera lens group according to Embodiment 5 of the present invention.
  • FIG. 11 is a schematic structural view of an imaging module in an embodiment of the present invention.
  • FIG. 12 is a schematic structural view of an imaging module in an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
  • FIG 14 is another schematic structural diagram of an electronic device in an embodiment of the present invention.
  • this application uses a four-piece optical camera lens group.
  • the positive or negative refractive power of the second lens and the fourth lens can adjust the aberration of the system to ensure the imaging quality.
  • the third lens provides positive refractive power
  • the inclination angle does not increase excessively, and the profile is also controlled to the extent that it is advantageous for processing.
  • the four-piece optical camera lens group according to the embodiment of the present invention ensures a lower sensitivity of the lens while requiring a higher optical transfer function, and the yield is guaranteed in actual production To maintain lower costs.
  • the air gap in the optical camera lens group has a relatively large space, and it also has certain flexibility and advantages in continuing to shorten the total length of the lens group.
  • An optical imaging lens group includes, in order from the object side to the image side, a diaphragm, a first lens with positive refractive power, a second lens, a third lens with positive refractive power, and a fourth lens.
  • the object side of the first lens is convex, and the image side is concave at the optical axis.
  • the object side surface of the second lens is convex at the optical axis, and the image side surface is concave.
  • the object side of the third lens is concave, and the image side is convex.
  • the object side surface of the fourth lens is convex at the optical axis, and the image side surface is concave at the optical axis.
  • the object side and the image side of the fourth lens are both aspherical, and at least one of the object side and the image side has at least one inflection point, or it is understood that the object side and the image side of the fourth lens At least one has an inflection point.
  • the optical camera lens group satisfies the following conditional expression: 0.8 ⁇ Sd21 / Sd11 ⁇ 0.9; where Sd21 is the height relative to the optical axis at the maximum effective diameter of the object side of the second lens, and Sd11 is the height of the first lens The height relative to the optical axis at the maximum effective diameter of the side of the object.
  • the four-piece optical camera lens group according to the embodiment of the present invention can achieve high pixels that can be achieved by the five-piece or six-piece optical camera lens group. Moreover, the use of four-piece optical camera lens group is conducive to reducing costs.
  • the diaphragm of the embodiment of the present invention is located in front of the first lens, which is beneficial to reduce the incident angle of the chief ray, increase the sensitivity of the photosensitive element, and improve the illuminance;
  • the optical imaging lens group satisfies the conditional expression 0.8 ⁇ Sd21 / Sd11 ⁇ 0.9, it is advantageous for miniaturization of the optical imaging lens group and can ensure that the optical imaging lens group has a large aperture.
  • the optical camera lens group satisfies the following conditional formula: T12 / (CT1 + CT2) ⁇ 0.32; where T12 is the image side of the first lens to the object side of the second lens For the distance on the optical axis, CT1 is the thickness of the first lens on the optical axis, and CT2 is the thickness of the second lens on the optical axis.
  • the sensitivity of the optical camera lens group can be reduced, a high imaging quality can be ensured, and the requirements of thinness and miniaturization can be met.
  • the optical camera lens group satisfies the following conditional expression: 2 ⁇
  • the optical camera lens group satisfies the following conditional expression: TTL / ImgH ⁇ 1.6; wherein, TTL is the distance from the object side of the first lens to the imaging plane on the optical axis, and ImgH is the The maximum imaging height of the optical camera lens group.
  • the optical camera lens group can satisfy both high pixels and miniaturization requirements.
  • the optical imaging lens group satisfies the following conditional expression: 0.8 ⁇ f1 / f ⁇ 1.5; where f1 is the focal length of the first lens, and f is the focal length of the optical imaging lens group.
  • the first lens shares most of the positive refractive power, and a reasonable distribution of the positive refractive power of the first lens can ensure good imaging quality.
  • the optical imaging lens group satisfies the following conditional formula: 0.5 ⁇ T23 / T34 ⁇ 1.2; where T23 is the image side of the second lens to the object side of the third lens at the optical axis T34 is the distance from the image side of the third lens to the object side of the fourth lens on the optical axis.
  • the sensitivity of the optical camera lens group can be reduced, which is beneficial to improve the product yield.
  • the optical imaging lens group satisfies the following conditional expression:
  • the third lens shares a part of the positive refractive power
  • the fourth lens provides a small part of the negative or positive refractive power to compensate for the aberrations generated by the third lens and the first two lens groups and improve the resolution.
  • the optical imaging lens group satisfies the following conditional expression:
  • the third lens shares a part of the positive refractive power
  • the fourth lens provides a small part of the negative or positive refractive power to compensate for the aberrations generated by the third lens and the first two lens groups and improve the resolution.
  • the optical camera lens group satisfies the following conditional formula: 0.4 ⁇ R5 / f12 ⁇ 0.9; where R5 is the radius of curvature of the image side of the second lens at the optical axis, and f12 is the The combined focal length of the first lens and the second lens.
  • the total optical length of the optical imaging lens component image can be effectively shortened, thereby meeting the demand for miniaturization.
  • An imaging module includes the optical imaging lens group and the photosensitive element described in any of the above embodiments.
  • the photosensitive element is provided on the image side of the optical imaging lens group.
  • the four-piece optical camera lens group can achieve the high pixels that can be achieved by the five-piece or six-piece optical camera lens group. Moreover, the use of four-piece optical camera lens group is conducive to reducing costs.
  • the diaphragm of the embodiment of the present invention is located before the first lens, which is beneficial to reduce the incident angle of the chief ray, increase the sensitivity of the photosensitive element, and improve the illuminance; further, the optical imaging lens group satisfies the conditional expression 0.8 ⁇ Sd21 / Sd11 ⁇ At 0.9, it is conducive to miniaturization of the optical camera lens group, and can ensure that the optical camera lens group has a larger aperture.
  • An electronic device includes a housing and the image capturing module described in the above embodiment.
  • the imaging module is installed on the housing.
  • the four-piece optical camera lens group can realize the high pixels that can be achieved by the five-piece or six-piece optical camera lens group. Moreover, the use of four-piece optical camera lens group is conducive to reducing costs.
  • the diaphragm of the embodiment of the present invention is located before the first lens, which is beneficial to reduce the incident angle of the chief ray, increase the sensitivity of the photosensitive element, and improve the illuminance; further, the optical imaging lens group satisfies the conditional expression 0.8 ⁇ Sd21 / Sd11 ⁇ At 0.9, it is conducive to miniaturization of the optical camera lens group, and can ensure that the optical camera lens group has a larger aperture.
  • an optical imaging lens group 10 includes, in order from the object side to the image side, an aperture STO, a first lens L1 with positive refractive power, a second lens L2, and a third lens with positive refractive power The lens L3 and the fourth lens L4.
  • the first lens L1 includes the object side S1 and the image side S2; the second lens L2 includes the object side S3 and the image side S4; the third lens L3 includes the object side S5 and the image side S6; the fourth lens L4 includes the object side S7 and the image side S8.
  • the optical imaging lens group 10 further has an imaging surface S11 on the image side of the fourth lens L4.
  • the imaging surface S11 may be a photosensitive surface of the photosensitive element.
  • the object side S1 of the first lens L1 is convex
  • the image side S2 is concave at the optical axis.
  • the object side surface S3 of the second lens L2 is convex at the optical axis
  • the image side surface S4 is concave.
  • the object side surface S5 of the third lens L3 is a concave surface
  • the image side surface S6 is a convex surface.
  • the object side surface S7 of the fourth lens L4 is convex at the optical axis
  • the image side surface S8 is concave at the optical axis.
  • the object side surface S7 and the image side surface S8 of the fourth lens L4 are both aspherical, and at least one of the object side surface S7 and the image side surface S8 has at least one inflection point.
  • the shape of the side surface from the center (optical axis) to the edge direction can be a pure convex surface; or the convex surface shape from the center first It transitions to a concave shape and then becomes convex when approaching the maximum effective radius.
  • the various shape structures (concave-convex relationship) on the side are not fully reflected, but other situations can be derived from the above examples.
  • the optical imaging lens group 10 satisfies the following conditional expression: 0.8 ⁇ Sd21 / Sd11 ⁇ 0.9; where Sd21 is the height of the object side surface S2 of the second lens L2 relative to the optical axis at the maximum effective diameter, and Sd11 is the object side surface of the first lens L1 The height of S1 relative to the optical axis at the maximum effective diameter.
  • Sd21 / Sd11 may take values of 0.800, 0.832, 0.900, 0.805, 0.865, or other values greater than 0.8 and less than 0.9.
  • the four-piece optical camera lens group 10 can achieve high pixels that can be achieved by the five-piece or six-piece optical camera lens group. Moreover, the use of a four-piece optical camera lens group 10 is beneficial to reduce costs.
  • the diaphragm STO of the embodiment of the present invention is located before the first lens L1, which is beneficial to reduce the incident angle of the chief ray, increase the sensitivity of the photosensitive element (the photosensitive element 20 shown in FIG. 11 and FIG. 12), and improve the illuminance;
  • the optical imaging lens group 10 is provided with a diaphragm STO, which may be disposed on the object side of the first lens L1.
  • a diaphragm STO which may be disposed on the object side of the first lens L1.
  • the first In the case of a lens L1, a second lens L2, etc., the projection of the stop STO on the optical axis of the first lens L1 may overlap the projection of the first lens L1 on the optical axis, or may not overlap.
  • the stop STO may be disposed on the object side S1 of the first lens L1.
  • optical imaging lens group 10 satisfies the conditional expression 0.8 ⁇ Sd21 / Sd11 ⁇ 0.9, it is advantageous for miniaturization of the optical imaging lens group 10 and can ensure that the optical imaging lens group 10 has a large aperture.
  • the optical camera lens group 10 has a larger aperture, which can increase the amount of incoming light, so that the optical camera lens group 10 has a clearer image.
  • setting an inflection point on the fourth lens L4 can effectively suppress the angle at which the rays of the off-axis field of view are incident on the photosensitive element 20 shown in FIGS. 11 and 12, thereby correcting the aberration of the off-axis field of view To improve imaging quality.
  • the optical imaging lens group 10 satisfies the following conditional expression: TTL / ImgH ⁇ 1.6; where TTL is the distance from the object side S1 of the first lens L1 to the imaging plane S11 on the optical axis, and ImgH is the optical imaging The maximum imaging height of the lens group 10.
  • TTL is the distance from the object side S1 of the first lens L1 to the imaging plane S11 on the optical axis
  • ImgH is the optical imaging The maximum imaging height of the lens group 10.
  • TTL / ImgH can take values of 1.466, 1.432, 1.363, 1.554, 1.600, or other values less than 1.6.
  • the optical camera lens group 10 satisfies the following conditional expression: 2 ⁇
  • R6-R7 may take values of 2.213, 2.632, 3.637, 3.706, 5.945, 4.491, or other values greater than 2 and less than 6.
  • the optical camera lens group 10 satisfies the following conditional formula: T12 / (CT1 + CT2) ⁇ 0.32; where, T12
  • CT1 is the thickness of the first lens L1 on the optical axis
  • CT2 is the thickness of the second lens L2 on the optical axis .
  • T12 / (CT1 + CT2) may take values of 0.167, 0.160, 0.309, 0.179, 0.320, or other values less than 0.32.
  • the optical imaging lens group 10 satisfies the following conditional expression: 0.8 ⁇ f1 / f ⁇ 1.5; where f1 is the focal length of the first lens L1 and f is the focal length of the optical imaging lens group 10.
  • f1 / f may take values of 1.008, 0.905, 1.184, 1.291, 1.475, or other values greater than 0.8 and less than 1.5.
  • the optical imaging lens group 10 satisfies the following conditional formula: 0.5 ⁇ T23 / T34 ⁇ 1.2; where T23 is the image side S4 of the second lens L2 to the object side S5 of the third lens L3 on the optical axis T34 is the distance from the image side S6 of the third lens L3 to the object side S7 of the fourth lens L4 on the optical axis.
  • T23 / T34 may take values of 0.837, 0.556, 0.785, 1.089, 1.097, or other values greater than 0.5 and less than 1.2.
  • the optical imaging lens group 10 satisfies the following conditional expression:
  • the third lens L3 shares a part of the positive refractive power
  • the fourth lens L4 provides a small part of the negative or positive refractive power to compensate the aberrations generated by the third lens L3 and the first two lens groups and improve the resolution .
  • f3 / f4 may take values of 1.980, 1.733, 1.635, 1.342, 0.752, 0.454, 0.204, 0.679, or other values less than 2.
  • the optical imaging lens group 10 satisfies the following conditional expression:
  • the third lens L3 shares a part of the positive refractive power
  • the fourth lens L4 provides a small part of the negative or positive refractive power to compensate the aberrations generated by the third lens L3 and the first two lens groups and improve the resolution .
  • may take a value of 0.752, 0.454, 0.204, 0.679, or other values less than 0.8.
  • the optical imaging lens group 10 satisfies the following conditional formula: 0.4 ⁇ R5 / f12 ⁇ 0.9; where R5 is the radius of curvature of the image side S4 of the second lens L2 at the optical axis, and f12 is the first lens The combined focal length of L1 and the second lens L2.
  • R5 / f12 may take values of 0.406, 0.670, 0.824, 0.443, 0.505, or other values greater than 0.4 and less than 0.9.
  • the optical camera lens group 10 further includes a filter.
  • the filter is an infrared filter L5.
  • the infrared filter L5 includes an object side S9 and an image side S10.
  • the infrared filter L5 is provided on the image side of the fourth lens L4.
  • the optical camera lens group 10 is used for imaging, the light emitted or reflected by the subject enters the optical camera lens group 10 from the object side direction, and passes through the first lens L1, the second lens L2, the third lens L3, the third The four lenses L4 and the infrared filter L5 finally converge on the imaging surface S11.
  • the infrared filter L5 is an infrared cut filter.
  • the infrared filter L5 can filter out infrared light and prevent infrared light from reaching the imaging surface S11, thereby avoiding infrared light from interfering with visible light imaging.
  • the infrared filter L5 is part of the optical camera lens group 10.
  • the infrared lens L5 may not be provided in the optical camera lens group 10, and the infrared filter L5 may be assembled together with the photosensitive element and assembled with the photosensitive element on the image side of the infrared filter L5
  • the infrared filter L5 may be directly provided in the infrared filter L5 to be integrated with each lens.
  • the materials of each lens in the optical camera lens group 10 are plastic.
  • the plastic lens can reduce the weight of the optical camera lens group 10 and reduce the production cost.
  • the material of each lens in the optical camera lens group 10 is glass.
  • the optical camera lens group 10 can withstand higher temperatures and has better optical performance.
  • the material of the first lens L1 is glass, and the material of the other lenses is plastic.
  • the first lens L1 closest to the object side can well withstand the influence of the ambient temperature on the object side, and Since the material of the other lenses is plastic, the optical camera lens group 10 can also maintain a low production cost.
  • the material of each lens in the optical camera lens group 10 may be either plastic or glass.
  • the shape of an aspheric surface is determined by the following formula:
  • Z is the distance from the corresponding point on the aspheric surface to the plane tangent to the surface vertex
  • r is the distance from the corresponding point on the aspheric surface to the optical axis
  • c is the curvature of the aspherical vertex
  • k is the conic constant
  • Ai is the i-th Order correction factor.
  • the optical imaging lens group 10 of this embodiment includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and an infrared filter from the object side to the image side L5.
  • the reference wavelength of the astigmatism diagram and distortion diagram in each embodiment is 555 nm.
  • the first lens L1 has positive refractive power and is made of plastic.
  • the object side surface S1 of the first lens L1 is convex at the optical axis and concave at the circumference; the image side surface S2 is concave at the optical axis and concave at the circumference. Both the object side S1 and the image side S2 are aspherical.
  • the second lens L2 has negative refractive power and is made of plastic.
  • the object side surface S3 of the second lens L2 is convex at the optical axis and concave at the circumference; the image side surface S4 is concave at the optical axis and concave at the circumference. Both the object side S3 and the image side S4 are aspherical.
  • the third lens L3 has positive refractive power and is made of plastic.
  • the object side surface S5 of the third lens L3 is concave at the optical axis and concave at the circumference; the image side surface S6 is convex at the optical axis and convex at the circumference. Both the object side S5 and the image side S6 are aspherical.
  • the fourth lens L4 has negative refractive power and is made of plastic.
  • the object side surface S7 of the fourth lens L4 is convex at the optical axis and concave at the circumference; the image side surface S8 is concave at the optical axis and convex at the circumference. Both the object side S7 and the image side S8 are aspherical.
  • the stop STO is provided between the subject and the first lens L1.
  • the aperture number FNO of the optical imaging lens group 10 is 2.20.
  • the infrared filter L5 is made of glass, which is disposed between the fourth lens L4 and the imaging surface S11 and does not affect the focal length of the optical imaging lens group.
  • the parameters of the optical camera lens group 10 are given in Table 1 and Table 2.
  • the elements of the optical imaging lens group 10 from the object surface (object side) to the imaging surface S11 are arranged in order of the elements in Table 1 from top to bottom.
  • the surface numbers 2 and 3 in Table 1 are the object side surface S1 and the image side surface S2 of the first lens L1, respectively. That is, in the same lens, the surface with the smaller surface number is the object side surface, and the surface with the larger surface number is the image side surface.
  • the Y radius is the radius of curvature of the object side or image side of the corresponding plane number at the optical axis (or understood as the paraxial axis).
  • the first value in the "thickness" parameter column of the first lens L1 is the thickness of the lens on the optical axis
  • the second value is the distance from the image side of the lens to the object side of the latter lens on the optical axis.
  • the numerical value of the infrared filter L5 corresponding to the surface number 11 in the "thickness” parameter is the distance from the image side S10 of the infrared cut filter L5 to the imaging surface S11.
  • k is the conic constant and Ai is the coefficient corresponding to the i-th higher order term in the aspherical surface formula.
  • the imaging surface S11 in Table 1 is the photosensitive surface of the photosensitive element.
  • the refractive index and focal length of each lens are the values at the reference wavelength.
  • the calculation of the relationship is based on the lens parameters (such as the data in Table 1) and the aspheric coefficients (such as the data in Table 2).
  • the optical camera lens group 10 meets the conditions of the following table:
  • the optical imaging lens group 10 of this embodiment includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and an infrared filter from the object side to the image side L5.
  • the first lens L1 has positive refractive power and is made of plastic.
  • the object side surface S1 of the first lens L1 is convex at the optical axis and convex at the circumference; the image side surface S2 is concave at the optical axis and concave at the circumference. Both the object side S1 and the image side S2 are aspherical.
  • the second lens L2 has negative refractive power and is made of plastic.
  • the object side surface S3 of the second lens L2 is convex at the optical axis and concave at the circumference; the image side surface S4 is concave at the optical axis and concave at the circumference. Both the object side S3 and the image side S4 are aspherical.
  • the third lens L3 has positive refractive power and is made of plastic.
  • the object side surface S5 of the third lens L3 is concave at the optical axis and concave at the circumference; the image side surface S6 is convex at the optical axis and convex at the circumference. Both the object side S5 and the image side S6 are aspherical.
  • the fourth lens L4 has negative refractive power and is made of plastic.
  • the object side S7 of the fourth lens L4 is convex at the optical axis and concave at the circumference; the image side S8 is concave at the optical axis and convex at the circumference, and both the object side S7 and the image side S8 are aspherical.
  • the stop STO is provided between the subject and the first lens L1.
  • the aperture number FNO of the optical imaging lens group 10 is 2.0.
  • the infrared filter L5 is made of glass, which is disposed between the fourth lens L4 and the imaging surface S11 and does not affect the focal length of the optical imaging lens group 10.
  • the optical camera lens group 10 also satisfies the conditions in the following table (the definition of each parameter can be obtained in the first embodiment, and will not be repeated here):
  • the optical imaging lens group 10 of this embodiment includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and an infrared filter from the object side to the image side L5.
  • the first lens L1 has positive refractive power and is made of plastic.
  • the object side surface S1 of the first lens L1 is convex at the optical axis and convex at the circumference; the image side surface S2 is concave at the optical axis and concave at the circumference. Both the object side S1 and the image side S2 are aspherical.
  • the second lens L2 has negative refractive power and is made of plastic.
  • the object side S3 of the second lens L2 is convex at the optical axis and concave at the circumference; the image side S4 is concave at the optical axis and concave at the circumference . Both the object side S3 and the image side S4 are aspherical.
  • the third lens L3 has positive refractive power and is made of plastic.
  • the object side surface S5 of the third lens L3 is concave at the optical axis and concave at the circumference; the image side surface S6 is convex at the optical axis and convex at the circumference. Both the object side S5 and the image side S6 are aspherical.
  • the fourth lens L4 has negative refractive power and is made of plastic.
  • the object side surface S7 of the fourth lens L4 is convex at the optical axis and convex at the circumference; the image side surface S8 is concave at the optical axis and convex at the circumference. Both the object side S7 and the image side S8 are aspherical.
  • the stop STO is provided between the subject and the first lens L1.
  • the aperture number FNO of the optical imaging lens group 10 is 1.80.
  • the infrared filter L5 is made of glass, which is disposed between the fourth lens L4 and the imaging surface S11 and does not affect the focal length of the optical imaging lens group.
  • the optical camera lens group 10 also satisfies the conditions in the following table (the definition of each parameter can be obtained in the first embodiment, and will not be repeated here):
  • the optical imaging lens group 10 of this embodiment includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and an infrared filter from the object side to the image side L5.
  • the first lens L1 has positive refractive power and is made of plastic.
  • the object side surface S1 of the first lens L1 is convex at the optical axis and convex at the circumference; the image side surface S2 is concave at the optical axis and convex at the circumference. Both the object side S1 and the image side S2 are aspherical.
  • the second lens L2 has negative refractive power and is made of plastic.
  • the object side surface S3 of the second lens L2 is convex on the optical axis and convex on the circumference; the image side surface S4 is concave on the optical axis and concave on the circumference. Both the object side S3 and the image side S4 are aspherical.
  • the third lens L3 has positive refractive power and is made of plastic.
  • the object side surface S5 of the third lens L3 is concave at the optical axis and concave at the circumference; the image side surface S6 is convex at the optical axis and convex at the circumference. Both the object side S5 and the image side S6 are aspherical.
  • the fourth lens L4 has positive refractive power and is made of plastic.
  • the object side surface S7 of the fourth lens L4 is convex at the optical axis and concave at the circumference; the image side surface S8 is concave at the optical axis and convex at the circumference. Both the object side S7 and the image side S8 are aspherical.
  • the stop STO is provided between the subject and the first lens L1.
  • the aperture number FNO of the optical imaging lens group 10 is 1.6.
  • the infrared filter L5 is made of glass, which is disposed between the fourth lens L4 and the imaging surface S11 and does not affect the focal length of the optical imaging lens group.
  • the optical camera lens group 10 also satisfies the conditions in the following table (the definition of each parameter can be obtained in the first embodiment, and will not be repeated here):
  • the optical imaging lens group 10 of this embodiment includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and an infrared filter from the object side to the image side L5.
  • the first lens L1 has positive refractive power and is made of plastic.
  • the object side surface S1 of the first lens L1 is convex at the optical axis and convex at the circumference; the image side surface S2 is concave at the optical axis and convex at the circumference. Both the object side S1 and the image side S2 are aspherical.
  • the second lens L2 has positive refractive power and is made of plastic.
  • the object side surface S3 of the second lens L2 is convex at the optical axis and concave at the circumference; the image side surface S4 is concave at the optical axis and concave at the circumference. Both the object side S3 and the image side S4 are aspherical.
  • the third lens L3 has positive refractive power and is made of plastic.
  • the object side surface S5 of the third lens L3 is concave at the optical axis and concave at the circumference; the image side surface S6 is convex at the optical axis and convex at the circumference. Both the object side S5 and the image side S6 are aspherical.
  • the fourth lens L4 has positive refractive power and is made of plastic.
  • the object side surface S7 of the fourth lens L4 is convex at the optical axis and convex at the circumference; the image side surface S8 is concave at the optical axis and convex at the circumference. Both the object side S7 and the image side S8 are aspherical.
  • the stop STO is provided between the subject and the first lens L1.
  • the aperture number FNO of the optical imaging lens group 10 is 1.5.
  • the infrared filter L5 is made of glass, which is disposed between the fourth lens L4 and the imaging surface S11 and does not affect the focal length of the optical imaging lens group 10.
  • the optical camera lens group 10 also satisfies the conditions in the following table (the definition of each parameter can be obtained in the first embodiment, and will not be repeated here):
  • the imaging module 100 of the embodiment of the present invention includes the optical camera lens group 10 and the photosensitive element 20 of any of the above embodiments.
  • the photosensitive element 20 is provided on the image side of the optical imaging lens group 10.
  • the four-piece optical camera lens group 10 can realize high pixels that can be achieved by the five-piece or six-piece optical camera lens group. Moreover, the use of a four-piece optical imaging lens group 10 is advantageous in reducing costs.
  • the diaphragm STO of the embodiment of the present invention is located before the first lens L1, which is beneficial to reduce the incident angle of the chief ray, increase the sensitivity of the photosensitive element 20, and improve the illuminance; further, the optical imaging lens group 10 satisfies the conditional expression 0.8 When Sd21 / Sd11 ⁇ 0.9, it is conducive to miniaturization of the optical imaging lens group 10 and can ensure that the optical imaging lens group 10 has a large aperture.
  • the photosensitive element 20 may use a complementary metal oxide semiconductor (Complementary Metal Oxide Semiconductor (CMOS) image sensor or a charge-coupled device (Charge-coupled Device, CCD) image sensor.
  • CMOS Complementary Metal Oxide Semiconductor
  • CCD Charge-coupled Device
  • the imaging module 100 further includes a lens barrel 30, a lens holder 40 and a circuit board 50, the photosensitive element 20 is provided on the circuit board 50 and is electrically connected to the circuit board 50, and the lens holder 40 is provided On the circuit board 50, the lens barrel 30 is connected to the lens holder 40, and the optical imaging lens group 10 is disposed in the lens barrel 30.
  • an electronic device 1000 according to an embodiment of the present invention includes a housing 200 and the imaging module 100 of the above embodiment.
  • the imaging module 100 is mounted on the housing 200.
  • the four-piece optical camera lens group can achieve high pixels that can be achieved by the five-piece or six-piece optical camera lens group. Moreover, the use of four-piece optical camera lens group is conducive to reducing costs.
  • the diaphragm of the embodiment of the present invention is located in front of the first lens, which is beneficial to reduce the incident angle of the chief ray, increase the sensitivity of the photosensitive element (such as the photosensitive element 20 shown in FIGS.
  • the optical imaging lens group satisfies the conditional expression 0.8 ⁇ Sd21 / Sd11 ⁇ 0.9, it is conducive to miniaturization of the optical imaging lens group 10 and can ensure that the optical imaging lens group has a large aperture.
  • the electronic device 1000 includes but is not limited to smart phones, tablet computers, notebook computers, digital still cameras, e-book readers, portable multimedia players (PMP), mobile medical devices, and smart wearable devices And other information terminal equipment or electronic devices with photographing functions.
  • the electronic device 1000 is a smartphone.
  • the electronic device 1000 is a notebook computer.
  • the imaging module 100 may be provided on the back of the electronic device 1000 or on the front of the electronic device 1000.
  • the "electronic device” used in the embodiments of the present invention may include, but is not limited to, being configured to be connected via a wired line (such as via a public switched telephone network (PSTN), a digital subscriber line (digital subscriber line, DSL), digital cable, direct cable connection, and / or another data connection / network) and / or via (eg, for cellular networks, wireless local area networks (WLAN), such as handheld digital video broadcasting (digital broadcasting / handheld (DVB-H) network digital television network, satellite network, amplitude-modulation-frequency (AM-FM) broadcast transmitter, and / or wireless interface of another communication terminal) to receive / transmit communication signals installation.
  • a wired line such as via a public switched telephone network (PSTN), a digital subscriber line (digital subscriber line, DSL), digital cable, direct cable connection, and / or another data connection / network
  • WLAN wireless local area networks
  • handheld digital video broadcasting digital broadcasting / handheld (DVB-H) network digital television
  • wireless communication terminals Electronic devices configured to communicate through a wireless interface may be referred to as “wireless communication terminals", “wireless terminals", and / or “mobile terminals”.
  • mobile terminals include, but are not limited to, satellite or cellular telephones; personal communication system (PCS) terminals that can combine cellular radiotelephones with data processing, facsimile, and data communication capabilities; can include radiotelephones, pagers, Internet / Personal digital assistant (personal digital assistant (PDA)) for intranet access, web browser, notepad, calendar, and / or global positioning system (GPS) receiver; and regular laptop and / or palmtop Receiver or other electronic device including a radio telephone transceiver.
  • PCS personal communication system
  • PDA personal digital assistant
  • GPS global positioning system
  • first and second are used for description purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
  • the features defined as “first” and “second” may explicitly or implicitly include at least one of the features.
  • the meaning of “plurality” is at least two, for example, two, three, etc., unless specifically defined otherwise.
  • connection In the present invention, unless otherwise clearly specified and defined, the terms “installation”, “connection”, “connection”, “fixation” and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , Or integrated; may be mechanical connection or electrical connection; may be directly connected, or may be indirectly connected through an intermediary, may be the connection between two elements or the interaction between two elements, unless otherwise specified Limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.
  • the first feature is “on” or “below” the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly through an intermediary contact.
  • the first feature is “above”, “above” and “above” the second feature may be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
  • the first feature is "below”, “below”, and “below” the second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontal than the second feature.

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

Abstract

Un ensemble lentille de photographie optique (10) comprend, dans l'ordre depuis le côté objet jusqu'au côté image : une première lentille (L1) ayant une réfringence positive, la surface côté objet (S1) de ladite lentille étant convexe et la surface côté image (S2) de ladite lentille étant concave, seconde lentille (L2), la surface côté objet (S3) de ladite lentille étant convexe et la surface côté image (S4) de ladite lentille étant concave, une troisième lentille (L3) ayant une réfringence positive, la surface côté objet (S5) de ladite lentille étant concave et la surface côté image (S6) de ladite lentille étant convexe, une quatrième lentille (L4), la surface côté objet (S7) de ladite lentille étant convexe et la surface côté image (S8) de ladite lentille étant concave. L'ensemble lentille de photographie optique (10) satisfait la relation 0.8≤Sd21/Sd11≤0.9, où Sd21 est la hauteur par rapport à l'axe optique au niveau du point du plus grand diamètre effectif de la surface côté objet (S3) de la deuxième lentille (L2), Et Sd11 est la hauteur par rapport à l'axe optique au point du plus grand diamètre effectif de la surface côté objet (S1) de la première lentille (L1).
PCT/CN2019/110553 2018-10-11 2019-10-11 Ensemble lentille de photographie optique, module d'imagerie et dispositif électronique WO2020073983A1 (fr)

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CN113189738A (zh) * 2020-01-14 2021-07-30 江西晶超光学有限公司 光学成像系统和具有其的取像装置、电子装置
CN113671665B (zh) * 2020-05-15 2022-10-21 新巨科技股份有限公司 四片式红外单波长镜片组
CN112034596A (zh) * 2020-09-24 2020-12-04 南昌欧菲精密光学制品有限公司 光学镜头、取像模组及电子装置
CN113281880B (zh) * 2021-05-10 2022-08-23 江西晶超光学有限公司 成像系统、镜头模组及电子设备
CN115113365B (zh) * 2022-05-23 2023-12-15 江西欧菲光学有限公司 光学系统、镜头模组和电子设备
CN115793208B (zh) * 2023-01-31 2023-05-26 深圳市都乐精密制造有限公司 一种大光圈小畸变镜头

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