WO2022033326A1 - Système optique, module de lentille et dispositif électronique - Google Patents

Système optique, module de lentille et dispositif électronique Download PDF

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Publication number
WO2022033326A1
WO2022033326A1 PCT/CN2021/109400 CN2021109400W WO2022033326A1 WO 2022033326 A1 WO2022033326 A1 WO 2022033326A1 CN 2021109400 W CN2021109400 W CN 2021109400W WO 2022033326 A1 WO2022033326 A1 WO 2022033326A1
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Prior art keywords
lens
optical system
optical axis
optical
object side
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PCT/CN2021/109400
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English (en)
Chinese (zh)
Inventor
王妮妮
刘彬彬
李明
邹海荣
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江西晶超光学有限公司
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Publication of WO2022033326A1 publication Critical patent/WO2022033326A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • 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 application belongs to the technical field of optical imaging, and in particular relates to an optical system, a lens module and an electronic device.
  • the purpose of the present application is to provide an optical system, a lens module and an electronic device, which can ensure the high-quality imaging quality of the system, and at the same time realize the telephoto characteristic and the lightness and thinness of the camera lens module.
  • the present invention provides an optical system, comprising in sequence from the object side to the image side along the optical axis direction: a first lens having a positive refractive power; The regions are all convex surfaces; the second lens, with refractive power; the third lens, with refractive power; the fourth lens, with refractive power; the fifth lens, with refractive power; the sixth lens, with refractive power; the optical system satisfies Conditional formula: 3 ⁇ (Y62*TL)/(ET6*f) ⁇ 10; wherein, Y62 is the maximum optical effective radius of the image side of the sixth lens, and TL is the distance from the object side of the first lens to the optical The on-axis distance of the imaging plane of the system, ET6 is the thickness of the edge of the sixth lens in the direction of the optical axis, and f is the effective focal length of the optical system. Satisfying the above relationship can balance the telephoto characteristic of the optical system and the thickness of the optical imaging lens, and reduce the maximum diameter
  • the optical system satisfies: the object sides of the near-circumferential regions of the third lens are all convex surfaces, the image sides of the near-circumferential regions of the third lens are all concave surfaces; the near-circumferential regions of the fourth lens are all concave surfaces; The object sides of the fourth lens are all concave, and the image sides of the near-circumferential area of the fourth lens are convex; the object sides of the fifth lens near the circumference are concave, and the image sides of the near-circumferential area of the fifth lens are all concave surfaces.
  • the object side surface of the near-circumferential region of the sixth lens is concave, and the image side of the sixth lens near-circumferential region is convex.
  • the optical system satisfies the conditional formula: 1.5 ⁇ TL/EPD ⁇ 3; further, 1.905 ⁇ TL/EPD ⁇ 2.82; wherein, EPD is the entrance pupil diameter of the optical system. Satisfying the above relationship can make the overall length of the optical system smaller and increase the amount of incoming light.
  • the optical system satisfies the conditional formula: 8 ⁇ (
  • the optical system satisfies the conditional formula: 5 ⁇ MVd/f ⁇ 10; further, 6.057(1/mm) ⁇ MVd/f ⁇ 9.052(1/mm); wherein, MVd is the optical system The average of the Abbe numbers of the system's six lenses. Satisfying the above relationship can balance chromatic aberration, and high Abbe number and low Abbe number correspond to different refractive indices, and can achieve telephoto characteristics and optical imaging performance through different material combinations.
  • the optical system satisfies the conditional formula: 0(1/mm) ⁇ ET1/(CT1*f) ⁇ 0.5(1/mm); further, 0.041(1/mm) ⁇ ET1/(CT1 *f) ⁇ 0.098(1/mm); wherein, ET1 is the thickness of the edge of the first lens in the direction of the optical axis, and CT1 is the thickness of the center of the first lens in the direction of the optical axis. Satisfying the above relational formula can facilitate the imaging of the first lens and achieve telephoto characteristics.
  • the optical system satisfies the conditional formula: 0(1/mm) ⁇ ET6/(CT6*f) ⁇ 0.5(1/mm); further, 0.045(1/mm) ⁇ ET6/(CT6 *f) ⁇ 0.152(1/mm); wherein, CT6 is the thickness of the center of the sixth lens in the direction of the optical axis. Satisfying the above relational expression is beneficial to the imaging of the sixth lens and realizes the telephoto characteristic.
  • the optical system satisfies the conditional formula: 0.3 ⁇ EPD/f ⁇ 0.6; further, 0.352 ⁇ EPD/f ⁇ 0.513; wherein, EPD is the entrance pupil diameter of the optical system. Satisfying the above relationship can balance the amount of light passing and the rearward shift of the image plane, and realize the characteristics of large aperture and telephoto.
  • the optical system satisfies the conditional formula: 0 ⁇
  • CT34 is the air separation distance between the third lens and the fourth lens on the optical axis. Satisfying the above relationship, through the reasonable layout of the optical structure, the direction change of the light entering the optical system can be slowed down, which helps to reduce the intensity of stray light, reduce the sensitivity of the optical system, and improve the production of the third lens. yield.
  • the optical system satisfies the conditional formula: 0 ⁇
  • CT34 is the air separation distance between the third lens and the fourth lens on the optical axis. Satisfying the above relationship, through the reasonable layout of the optical structure, the direction change of the light entering the optical system can be slowed down, which helps to reduce the intensity of ghost images, reduce the sensitivity of the optical system, and improve the production of the fourth lens. yield.
  • the optical system satisfies the conditional formula: 2 ⁇ TL/ImgH ⁇ 3; further, 2.143 ⁇ TL/ImgH ⁇ 2.471; wherein, ImgH is the image height corresponding to the maximum angle of view of the optical system half of . Satisfying the above-mentioned relational expression is beneficial to realize the lightness and thinness of the camera lens module.
  • the present invention further provides a lens module including the optical system described in any one of the embodiments of the first aspect.
  • the lens module has the characteristics of long focal length, high pixel and lightness.
  • the present invention further provides an electronic device, the electronic device includes a housing and the lens module described in the second aspect, wherein the lens module is arranged in the housing.
  • the electronic device has the characteristics of high pixel, long focal length, and lightness and thinness.
  • 1a is a schematic structural diagram of an optical system of the first embodiment
  • Fig. 1b is the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the first embodiment
  • 2a is a schematic structural diagram of an optical system of a second embodiment
  • Fig. 2b is the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the second embodiment
  • 3a is a schematic structural diagram of an optical system of a third embodiment
  • Fig. 3b is the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the third embodiment
  • 4a is a schematic structural diagram of an optical system of a fourth embodiment
  • Fig. 4b is the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the fourth embodiment
  • Fig. 5a is the structural schematic diagram of the optical system of the fifth embodiment
  • Fig. 5b is a longitudinal spherical aberration curve, astigmatism curve and distortion curve of the fifth embodiment.
  • 6a is a schematic structural diagram of an optical system according to a sixth embodiment
  • Fig. 6b is the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the sixth embodiment
  • FIG. 7a is a schematic structural diagram of an optical system according to a seventh embodiment
  • FIG. 7b is the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the seventh embodiment.
  • An embodiment of the present invention provides a lens module.
  • the lens module includes a lens barrel and the optical system provided by the embodiment of the present invention.
  • the first lens to the sixth lens of the optical system are installed in the lens barrel.
  • the lens module can be an independent lens of a digital camera, or an imaging module integrated on an electronic device such as an industrial barcode scanner.
  • the lens module has the characteristics of high pixel, long focal length and lightness.
  • the embodiment of the present invention provides an electronic device, the electronic device includes a housing and the lens module provided by the embodiment of the present invention, and the lens module is arranged in the housing. Further, the electronic device may further include an electronic photosensitive element, the photosensitive surface of the electronic photosensitive element is located on the image plane of the optical system, and the light rays incident on the object on the photosensitive surface of the electronic photosensitive element through the first lens to the sixth lens can be converted into Image of electrical signals.
  • the electronic photosensitive element may be a complementary metal oxide semiconductor (Complementary Metal Oxide Semiconductor, CMOS) or a charge-coupled device (Charge-coupled Device, CCD).
  • the electronic device can be an industrial barcode scanner, a smart phone, a personal digital assistant (PDA), a tablet computer, a smart watch, a drone, an e-book reader, a driving recorder, a wearable device, a monitor, a security camera device, Medical camera equipment, production and assembly of camera equipment, etc.
  • PDA personal digital assistant
  • the electronic device not only has high pixels, but also has the characteristics of telephoto and thinning.
  • the optical system provided by the embodiment of the present invention sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from the object side to the image side along the optical axis direction.
  • any two adjacent lenses may have an air space between them.
  • the specific shapes and structures of the six lenses are as follows: the first lens has a positive refractive power, and both the near-optical axis region and the near-circumferential region of the object side of the first lens are convex; the second to sixth lenses all have refractive power force; the optical system satisfies the conditional formula: 3 ⁇ (Y62*TL)/(ET6*f) ⁇ 10; further, 3.414 ⁇ (Y62*TL)/(ET6*f) ⁇ 8.4; wherein, Y62 is the sixth lens
  • TL is the axial distance from the object side of the first lens to the imaging surface of the optical system
  • ET6 is the thickness of the edge of the sixth lens in the direction of the optical axis
  • f is the effective focal length of the optical system. Satisfying the above relationship can balance the telephoto characteristics of the optical system and the thickness of the optical imaging lens, and reduce the maximum diameter of the optical imaging lens while ensuring the imaging rate of the sixth lens.
  • the optical system also includes a diaphragm.
  • the diaphragm can be arranged on the object side or the image side of the first lens to the sixth lens, and can also be arranged at any position between any two lenses.
  • the diaphragm is set in this embodiment. on the object side of the first lens.
  • An infrared cut-off filter can also be set between the sixth lens and the imaging surface, which is used to pass through the visible light band and cut off the infrared light band, so as to avoid the phenomenon of false color or ripple caused by the interference of light waves in the non-working band, and at the same time, it can improve the effective Resolution and color reproduction.
  • the six-piece lens structure By setting up the six-piece lens structure, reasonably configuring the refractive power and surface shape of the six-piece optical lens, and making the optical system satisfy the above-mentioned relationship, while ensuring high imaging quality, the telephoto characteristic and lightness of the optical system can be achieved. change.
  • the optical system satisfies: the object sides of the near-circumferential region of the third lens are all convex surfaces, the image sides of the near-circumferential regions of the third lens are all concave surfaces; the object sides of the near-circumferential regions of the fourth lens are all concave surfaces, the The image sides in the near-circumferential area of the four lenses are all convex; the object sides in the near-circumferential area of the fifth lens are concave, the image sides in the near-circumferential area of the fifth lens are convex; the object sides in the near-circumferential area of the sixth lens are concave , the image side surface of the sixth lens near the circumference area is convex.
  • the optical system satisfies the conditional formula: 1.5 ⁇ TL/EPD ⁇ 3; further, 1.905 ⁇ TL/EPD ⁇ 2.82; wherein, EPD is the entrance pupil diameter of the optical system. Satisfying the above relationship can make the overall length of the optical system smaller and increase the amount of incoming light.
  • the optical system satisfies the conditional formula: 8(°/mm) ⁇ (
  • the optical system satisfies the conditional formula: 5(1/mm) ⁇ MVd/f ⁇ 10(1/mm); further, 6.057(1/mm) ⁇ MVd/f ⁇ 9.052(1/mm) ; where MVd is the average of the Abbe numbers of the six lenses of the optical system. Satisfying the above relationship can balance the chromatic aberration, and the high Abbe number and the low Abbe number correspond to different refractive indices, and the telephoto characteristic and optical imaging performance can be achieved by the combination of different materials.
  • the optical system satisfies the conditional formula: 0(1/mm) ⁇ ET1/(CT1*f) ⁇ 0.5(1/mm); further, 0.041(1/mm) ⁇ ET1/(CT1*f ) ⁇ 0.098(1/mm); wherein, ET1 is the thickness of the edge of the first lens in the direction of the optical axis, and CT1 is the thickness of the center of the first lens in the direction of the optical axis. Satisfying the above-mentioned relational expression can facilitate the imaging of the first lens and realize the telephoto characteristic.
  • the optical system satisfies the conditional formula: 0(1/mm) ⁇ ET6/(CT6*f) ⁇ 0.5(1/mm); further, 0.045(1/mm) ⁇ ET6/(CT6*f ) ⁇ 0.152(1/mm); wherein, CT6 is the thickness of the center of the sixth lens in the direction of the optical axis. Satisfying the above-mentioned relational expression can facilitate the imaging of the sixth lens and realize the telephoto characteristic.
  • the optical system satisfies the conditional formula: 0.3 ⁇ EPD/f ⁇ 0.6; further, 0.352 ⁇ EPD/f ⁇ 0.513; wherein, EPD is the entrance pupil diameter of the optical system. Satisfying the above relationship can balance the amount of light passing and the rearward movement of the imaging plane to achieve large aperture and telephoto characteristics.
  • the optical system satisfies the conditional formula: 0 ⁇
  • CT34 is the air separation distance between the third lens and the fourth lens on the optical axis.
  • the optical system satisfies the conditional formula: 0 ⁇
  • CT34 is the air separation distance between the third lens and the fourth lens on the optical axis. Satisfying the above relational formula can reduce the direction change of light after entering the optical system through a reasonable layout of the optical structure, which helps to reduce the intensity of ghost images, reduce the sensitivity of the optical system, and improve the yield of the fourth lens.
  • the optical system satisfies the conditional formula: 2 ⁇ TL/ImgH ⁇ 3; further, 2.143 ⁇ TL/ImgH ⁇ 2.471; wherein, ImgH is half of the image height corresponding to the maximum field angle of the optical system. Satisfying the above-mentioned relational expression is beneficial to realizing the lightness and thickness of the imaging lens group.
  • the optical system of this embodiment includes sequentially from the object side to the image side along the optical axis direction:
  • the first lens L1 has a positive refractive power, the near-optical axis region and the near-circumferential region of the object side S1 of the first lens L1 are convex surfaces, and the image side S2 of the first lens L1
  • the near-optical axis region and the near-circumferential region are both concave surfaces ;
  • the second lens L2 has a positive refractive power, the near-optical axis area and the near-circumferential area of the object side S3 of the second lens L2 are convex surfaces, and the near-optical axis area and the near-circumferential area of the image side S4 of the second lens L2 are both convex;
  • the third lens L3 has a negative refractive power, the near-optical axis area and the near-circumferential area of the object side S5 of the third lens L3 are convex surfaces, and the near-optical axis area and the near-circumferential area of the image side S6 of the third lens L3 are both concave surfaces ;
  • the fourth lens L4 has a positive refractive power, the near-optical axis area and the near-circumferential area of the object side S7 of the fourth lens L4 are concave surfaces, and the near-optical axis area and the near-circumferential area of the image side S8 of the fourth lens L4 are both. convex;
  • the fifth lens L5 has negative refractive power, the object side S9 of the fifth lens L5 is concave in the near-optical axis area and the near-circumferential area, the image side S10 of the fifth lens L5 is concave in the near-optical axis area, and the near-circumferential area is convex. ;
  • the sixth lens L6 has a positive refractive power
  • the object side surface S11 of the sixth lens L6 is a convex surface near the optical axis
  • the near-circumferential region is a concave surface
  • the image side S12 of the sixth lens L6 The near-optical axis region and the near-circumferential region are convex surfaces .
  • the materials of the first lens L1 to the sixth lens L6 are all plastic, and all are aspherical.
  • the optical system also includes a diaphragm ST0, an infrared cut filter IR, and an imaging plane IMG.
  • the diaphragm STO is disposed on the object side of the first lens L1 for controlling the amount of incoming light. In other embodiments, the stop STO may also be disposed between two adjacent lenses, or on other lenses.
  • the infrared cut filter IR is arranged on the image side of the sixth lens L6, which includes the object side S13 and the image side S14, and the infrared cut filter IR is used to filter out infrared light, so that the light entering the imaging surface IMG is visible light , the wavelength of visible light is 380nm-780nm.
  • the material of the infrared cut filter IR is glass (GLASS), and can be coated on the glass.
  • the effective pixel area of the electronic photosensitive element is located on the imaging plane IMG.
  • Table 1a is a table showing the characteristics of the optical system of the present embodiment, wherein the units of Y radius, thickness and focal length are all millimeters (mm).
  • f is the effective focal length of the optical system
  • FNO is the aperture number of the optical system
  • FOV is the maximum field of view of the optical system.
  • the object side surface and the image side surface of the first lens L1 to the sixth lens L6 are all aspherical surfaces, and the surface type x of each aspherical lens can be limited by but not limited to the following aspherical surface formulas:
  • x is the distance vector height of the aspheric surface from the vertex of the aspheric surface when the height is h along the optical axis;
  • k is the conic coefficient;
  • Ai is the correction coefficient of the i-th order of the aspheric surface.
  • Table 1b gives the higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each of the aspheric mirror surfaces S3-S12 in the first embodiment.
  • FIG. 1b shows longitudinal spherical aberration curves, astigmatism curves and distortion curves of the optical system of the first embodiment.
  • the longitudinal spherical aberration curve represents the deviation of the focal point of light of different wavelengths after passing through each lens of the optical system;
  • the astigmatic curve represents the curvature of the meridional image plane and the curvature of the sagittal image plane;
  • the distortion curve represents the magnitude of distortion corresponding to different field angles . It can be seen from FIG. 1b that the optical system provided in the first embodiment can achieve good imaging quality.
  • the optical system of this embodiment includes sequentially from the object side to the image side along the optical axis direction:
  • the first lens L1 has a positive refractive power, the near-optical axis region and the near-circumferential region of the object side S1 of the first lens L1 are convex surfaces, and the image side S2 of the first lens L1
  • the near-optical axis region and the near-circumferential region are both concave surfaces ;
  • the second lens L2 has a positive refractive power, the near-optical axis region and the near-circumferential region of the object side S3 of the second lens L2 are convex surfaces, the near-optical axis region of the image side S4 of the second lens L2 is convex, and the near-circumferential region is concave;
  • the third lens L3 has a negative refractive power, and the object side S5 of the third lens L3 near the optical axis area and the near circumference area are convex surfaces, and the image side S6 near the optical axis area and the near circumference area of the third lens L3 are both concave surfaces;
  • the 4th lens L4 has negative refractive power, and the object side S7 of the 4th lens L4 near the optical axis area and the near-circumferential area are both concave surfaces, and the image side S8 of the fourth lens L4
  • the near-optical axis area and the near-circumferential area are convex surfaces
  • the fifth lens L5 has negative refractive power
  • the object side S9 of the fifth lens L5 is a convex surface near the optical axis
  • the near-circumferential area is a concave surface
  • the image side S10 of the fifth lens L5 is a concave near-optical axis area
  • the near-circumferential area is a concave surface.
  • the sixth lens L6 has a positive refractive power
  • the object side surface S11 of the sixth lens L6 is a convex surface near the optical axis
  • the near circumference area is a concave surface
  • the image side S12 of the sixth lens L6 is a concave surface near the optical axis area
  • the near circumference area is concave. is convex.
  • Table 2a shows a table of characteristics of the optical system of the present embodiment, wherein the units of Y radius, thickness and focal length are all millimeters (mm).
  • Table 2b shows the coefficients of higher-order terms that can be used for each aspherical mirror surface in the second embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.
  • Fig. 2b shows the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical system of the second embodiment, wherein the longitudinal spherical aberration curve represents the deviation of the focusing point of light of different wavelengths after passing through each lens of the optical system; astigmatism The curve represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curve represents the magnitude of the distortion corresponding to different field angles. It can be seen from FIG. 2b that the optical system provided in the second embodiment can achieve good imaging quality.
  • the optical system of this embodiment includes sequentially from the object side to the image side along the optical axis direction:
  • the first lens L1 has a positive refractive power, the object side S1 of the first lens L1 near the optical axis area and the near circumference area are convex surfaces, and the image side S2 of the first lens L1
  • the near optical axis area and the near circumference area are both concave surfaces;
  • the second lens L2 has a positive refractive power, the object side S3 of the second lens L2 is convex in the near-optical axis area and the near-circumferential area, the image-side S4 of the second lens L2 is concave in the near-optical axis area, and the near-circumferential area is convex. ;
  • the third lens L3 has a negative refractive power, the object side S5 of the third lens L3 is concave in the near-optical axis area, the near-circumferential area is convex, the image side S6 of the third lens L3 is convex in the near-optical axis area, and the near-circumferential area is concave;
  • the 4th lens L4 has negative refractive power, and the object side S7 of the 4th lens L4 near the optical axis area and the near-circumferential area are both concave surfaces, and the image side S8 of the fourth lens L4
  • the near-optical axis area and the near-circumferential area are convex surfaces
  • the fifth lens L5 has negative refractive power, and the object side S9 of the fifth lens L5 near the optical axis area and the near circumference area are both concave surfaces, and the image side S10 near the optical axis area and the near circumference area of the fifth lens L5 are convex surfaces;
  • the sixth lens L6 has a negative refractive power, the object side S11 of the sixth lens L6 is concave in the near-optical axis region and the near-circumferential region, and the image side S12 of the sixth lens L6 is convex in the near-optical axis and near-circumferential regions.
  • Table 3a shows a table of characteristics of the optical system of the present embodiment, wherein the units of Y radius, thickness and focal length are all millimeters (mm).
  • Table 3b shows the coefficients of higher-order terms that can be used for each aspherical mirror surface in the third embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.
  • Fig. 3b shows longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical system of the third embodiment, wherein the longitudinal spherical aberration curve represents the deviation of the focusing point of light of different wavelengths after passing through each lens of the optical system; astigmatism The curve represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curve represents the magnitude of the distortion corresponding to different field angles. According to Fig. 3b, it can be seen that the optical system provided in the third embodiment can achieve good imaging quality.
  • the optical system of the present embodiment includes sequentially from the object side to the image side along the optical axis direction:
  • the first lens L1 has a positive refractive power, the object side S1 of the first lens L1 near the optical axis area and the near circumference area are convex surfaces, and the image side S2 of the first lens L1
  • the near optical axis area and the near circumference area are both concave surfaces;
  • the second lens L2 has positive refractive power, and the object side S3 of the second lens L2 near the optical axis area and the near circumference area are convex surfaces, and the image side S4 near the optical axis area and the near circumference area of the second lens L2 are concave surfaces;
  • the third lens L3 has a negative refractive power
  • the object side S5 of the third lens L3 has a concave near-optical axis area
  • the near-circumferential area is convex
  • the image side S6 of the third lens L3 has a near-optical axis area and a near-circumferential area. concave;
  • the fourth lens L4 has negative refractive power, the object side S7 of the fourth lens L4 is a convex surface near the optical axis, and the near-circumferential area is a concave surface, and the image side S8 of the fourth lens L4 is a concave near-optical axis area, and the near-circumferential area is a concave surface. convex;
  • the fifth lens L5 has negative refractive power, and the object side S9 of the fifth lens L5 near the optical axis area and the near circumference area are both concave surfaces, and the image side S10 near the optical axis area and the near circumference area of the fifth lens L5 are convex surfaces;
  • the sixth lens L6 has a negative refractive power
  • the object side surface S11 of the sixth lens L6 is a convex surface near the optical axis
  • the near circumference area is a concave surface
  • the image side S12 of the sixth lens L6 is a concave surface near the optical axis area
  • the near circumference area is Convex.
  • Table 4a shows a table of characteristics of the optical system of the present embodiment, wherein the units of Y radius, thickness and focal length are all millimeters (mm).
  • Table 4b shows the coefficients of higher-order terms that can be used for each aspherical mirror surface in the fourth embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.
  • Fig. 4b shows longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical system of the fourth embodiment, wherein the longitudinal spherical aberration curve represents the deviation of the focusing point of light of different wavelengths after passing through each lens of the optical system; astigmatism The curve represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curve represents the magnitude of the distortion corresponding to different field angles. It can be seen from FIG. 4b that the optical system provided in the fourth embodiment can achieve good imaging quality.
  • the optical system of this embodiment includes sequentially from the object side to the image side along the optical axis direction:
  • the first lens L1 has a positive refractive power, the object side S1 of the first lens L1 near the optical axis area and the near circumference area are convex surfaces, and the image side S2 of the first lens L1
  • the near optical axis area and the near circumference area are convex surfaces;
  • the second lens L2 has negative refractive power, the object side S3 of the second lens L2 is concave in the near-optical axis area and the near-circumferential area, the image side S4 of the second lens L2 is concave in the near-optical axis area, and the near-circumferential area is convex. ;
  • the third lens L3 has a negative refractive power, the object side surface S5 of the third lens L3 is concave in the near-optical axis area, the near-circumferential area is convex, and the image side S6 of the third lens L3
  • the near-optical axis area and the near-circumferential area are concave surfaces ;
  • the fourth lens L4 has a positive refractive power, the object side S7 of the fourth lens L4 is a convex surface near the optical axis, and the near-circumferential area is a concave surface, and the image side S8 of the fourth lens L4 is a concave near the optical axis area, and the near-circumferential area is a concave surface. convex;
  • the fifth lens L5 has negative refractive power
  • the object side S9 of the fifth lens L5 is a convex surface near the optical axis
  • the near-circumferential area is a concave surface
  • the image side S10 of the fifth lens L5 is a concave near-optical axis area
  • the near-circumferential area is a concave surface.
  • the sixth lens L6 has a positive refractive power
  • the object side surface S11 of the sixth lens L6 is a convex surface near the optical axis
  • the near-circumferential region is a concave surface
  • the image side S12 of the sixth lens L6 is a concave surface near the optical axis
  • the near-circumferential region is a concave surface. Convex.
  • the other structures of the fifth embodiment are the same as those of the first embodiment, which can be referred to.
  • Table 5a is a table showing the characteristics of the optical system of the present embodiment, wherein the units of Y radius, thickness and focal length are all millimeters (mm).
  • Table 5b shows the coefficients of higher-order terms that can be used for each aspherical mirror surface in the fifth embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.
  • Fig. 5b shows the longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical system of the fifth embodiment, wherein the longitudinal spherical aberration curve represents the deviation of the focusing point of light of different wavelengths after passing through each lens of the optical system; astigmatism The curve represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curve represents the magnitude of the distortion corresponding to different field angles. According to Fig. 5b, it can be seen that the optical system provided in the fifth embodiment can achieve good imaging quality.
  • the optical system of this embodiment from the object side to the image side along the optical axis direction, sequentially includes:
  • the first lens L1 has a positive refractive power, the object side S1 of the first lens L1 near the optical axis area and the near circumference area are convex surfaces, and the image side S2 of the first lens L1
  • the near optical axis area and the near circumference area are both concave surfaces;
  • the second lens L2 has positive refractive power, and the object side S3 of the second lens L2 near the optical axis area and the near circumference area are convex surfaces, and the image side S4 near the optical axis area and the near circumference area of the second lens L2 are concave surfaces;
  • the third lens L3 has a negative refractive power, and the object side S5 of the third lens L3 near the optical axis area and the near circumference area are convex surfaces, and the image side S6 near the optical axis area and the near circumference area of the third lens L3 are both concave surfaces;
  • the fourth lens L4 has a positive refractive power, and the object side S7 of the fourth lens L4 near the optical axis area and the near circumference area are both concave surfaces, and the image side S8 near the optical axis area and the near circumference area of the fourth lens L4 are convex surfaces;
  • the fifth lens L5 has a positive refractive power, and the object side S9 of the fifth lens L5 near the optical axis area and the near circumference area are both concave surfaces, and the image side S10 near the optical axis area and the near circumference area of the fifth lens L5 are convex surfaces;
  • the sixth lens L6 has a negative refractive power, the object side surface S11 of the sixth lens L6 is concave in the near-optical axis area and the near-circumferential area, the image side S12 of the sixth lens L6 is concave in the near-optical axis area, and the near-circumferential area is convex. .
  • Table 6a shows a table of characteristics of the optical system of the present embodiment, wherein the units of Y radius, thickness and focal length are all millimeters (mm).
  • Table 6b shows the coefficients of higher-order terms that can be used for each aspherical mirror surface in the sixth embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.
  • Fig. 6b shows longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical system of the sixth embodiment, wherein the longitudinal spherical aberration curve represents the deviation of the converging point of light of different wavelengths after passing through each lens of the optical system; astigmatism The curve represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curve represents the magnitude of the distortion corresponding to different field angles. It can be seen from FIG. 6b that the optical system provided in the sixth embodiment can achieve good imaging quality.
  • the optical system of this embodiment sequentially includes:
  • the first lens L1 has a positive refractive power, the near-optical axis region and the near-circumferential region of the object side S1 of the first lens L1 are convex surfaces, the image side S2 of the first lens L1 is concave in the near-optical axis region, and the near-circumferential region is convex. ;
  • the second lens L2 has negative refractive power, the object side S3 of the second lens L2 is convex in the near-optical axis area and the near-circumferential area, the image-side S4 of the second lens L2 is concave in the near-optical axis area, and the near-circumferential area is convex. ;
  • the third lens L3 has a positive refractive power, and the object side S5 of the third lens L3 near the optical axis area and the near circumference area are convex surfaces, and the image side S6 near the optical axis area and the near circumference area of the third lens L3 are both concave surfaces;
  • the 4th lens L4 has negative refractive power, and the object side S7 of the 4th lens L4 near the optical axis area and the near-circumferential area are both concave surfaces, and the image side S8 of the fourth lens L4
  • the near-optical axis area and the near-circumferential area are convex surfaces
  • the fifth lens L5 has negative refractive power, the object side S9 of the fifth lens L5 is concave in the near-optical axis area and the near-circumferential area, the image side S10 of the fifth lens L5 is concave in the near-optical axis area, and the near-circumferential area is convex. ;
  • the sixth lens L6 has a positive refractive power, the object side S11 of the sixth lens L6 is concave in the near-optical axis area and the near-circumferential area, and the image side S12 of the sixth lens L6 is convex in the near-optical axis area and the near-circumferential area.
  • the other structures of the seventh embodiment are the same as those of the first embodiment, which can be referred to.
  • Table 7a shows a table of characteristics of the optical system of the present embodiment, wherein the units of Y radius, thickness and focal length are all millimeters (mm).
  • Table 7b shows the coefficients of higher-order terms that can be used for each aspherical mirror surface in the seventh embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.
  • Fig. 7b shows longitudinal spherical aberration curve, astigmatism curve and distortion curve of the optical system of the seventh embodiment, wherein the longitudinal spherical aberration curve represents the deviation of the focusing point of light of different wavelengths after passing through each lens of the optical system; astigmatism The curve represents the curvature of the meridional image plane and the curvature of the sagittal image plane; the distortion curve represents the magnitude of the distortion corresponding to different field angles. It can be seen from FIG. 7b that the optical system provided in the seventh embodiment can achieve good imaging quality.
  • Table 8 shows (Y62*TL)/(ET6*f), TL/EPD, (

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

Abstract

La présente invention concerne un système optique, un module de lentille et un dispositif électronique. Le système optique comprend séquentiellement des première à sixième lentilles d'un côté objet à un côté image dans une direction d'axe optique ; la première lentille a une réfringence positive, et une région paraxiale et une région circonférentielle proche d'une surface côté objet de la première lentille sont toutes les deux des surfaces convexes ; la deuxième lentille et la sixième lentille ont toutes une réfringence ; le système optique satisfait l'expression conditionnelle : 3≤(Y62*TL)/(ET6*f)≤10, Y62 étant le rayon effectif optique maximal d'une surface côté image de la sixième lentille, TL étant la distance sur l'axe de la surface côté objet de la première lentille à une surface d'imagerie du système optique, ET6 étant l'épaisseur du bord de la sixième lentille dans la direction de l'axe optique, et f étant la distance focale effective du système optique. Par agencement d'une structure à six lentilles, la réfringence et les types de surface des six lentilles optiques sont raisonnablement configurés, et le système optique satisfait l'expression relationnelle ci-dessus, de telle sorte que la caractéristique de focalisation longue et la légèreté et la finesse peuvent être réalisées tandis que la qualité d'imagerie de haute qualité est assurée.
PCT/CN2021/109400 2020-08-13 2021-07-29 Système optique, module de lentille et dispositif électronique WO2022033326A1 (fr)

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CN111897095A (zh) * 2020-08-13 2020-11-06 南昌欧菲精密光学制品有限公司 光学系统、镜头模组和电子设备
TWI768498B (zh) 2020-10-08 2022-06-21 大立光電股份有限公司 影像擷取鏡頭組、取像裝置及電子裝置
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