WO2024061220A1 - Lentille optique - Google Patents

Lentille optique Download PDF

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Publication number
WO2024061220A1
WO2024061220A1 PCT/CN2023/119744 CN2023119744W WO2024061220A1 WO 2024061220 A1 WO2024061220 A1 WO 2024061220A1 CN 2023119744 W CN2023119744 W CN 2023119744W WO 2024061220 A1 WO2024061220 A1 WO 2024061220A1
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WIPO (PCT)
Prior art keywords
lens
optical
optical lens
object side
satisfy
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Application number
PCT/CN2023/119744
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English (en)
Chinese (zh)
Inventor
凌兵兵
鲍宇旻
Original Assignee
江西联创电子有限公司
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Publication of WO2024061220A1 publication Critical patent/WO2024061220A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles

Definitions

  • the present application relates to the technical field of imaging lenses, and in particular to an optical lens.
  • the front-facing camera enhances active safety and driver assistance features such as autonomous emergency braking (AEB), adaptive cruise control (ACC), lane keeping assist system (LKAS) and traffic jam assist (TJA). While meeting the advantages of high resolution, large field of view, and good environmental adaptability, it also has disadvantages such as a large number of lenses and too long total optical length, which is not conducive to the miniaturization of electronic systems.
  • AEB autonomous emergency braking
  • ACC adaptive cruise control
  • LKAS lane keeping assist system
  • TJA traffic jam assist
  • the purpose of this application is to propose an optical lens that simultaneously has the advantages of a large field of view, a large aperture, and miniaturization.
  • this application provides an optical lens with a total of six lenses, which are as follows along the optical axis from the object side to the imaging surface:
  • the first lens with negative optical power has concave surfaces on both the object side and the image side;
  • the second lens with positive optical power has a convex image side surface
  • the third lens with positive optical power has convex surfaces on both the object side and the image side;
  • the sixth lens with optical power has a convex object side surface
  • the maximum field of view FOV of the optical lens, the true image height IH corresponding to the maximum field of view and the effective working aperture D 1 of the object side of the first lens satisfy: D 1 /IH/tan(FOV/2) ⁇ 0.8.
  • the total optical length TTL and effective focal length f of the optical lens satisfy: 4.0 ⁇ TTL/f ⁇ 5.0.
  • the total optical length TTL of the optical lens and the true image height IH corresponding to the maximum field of view satisfy: 2.5 ⁇ TTL/IH.
  • the optical back focus BFL and effective focal length f of the optical lens satisfy: 0.5 ⁇ BFL/f.
  • the entrance pupil diameter EPD of the optical lens and the true image height IH corresponding to the maximum field of view satisfy: 2.5 ⁇ IH/EPD ⁇ 3.0.
  • the maximum half angle of view HFOV of the optical lens and the incident angle CRA of the principal ray of the maximum angle of view on the image plane satisfy: 3.0 ⁇ HFOV/CRA ⁇ 4.5.
  • the effective focal length f of the optical lens and the combined focal length f 23 of the second lens and the third lens satisfy: 0.9 ⁇ f 23 /f ⁇ 1.2.
  • the effective focal length f of the optical lens and the combined focal length f 46 of the fourth lens to the sixth lens satisfy: -14.0 ⁇ f 46 /f ⁇ -4.0.
  • the object side curvature radius R 1 and the image side curvature radius R 2 of the first lens satisfy: -5.0 ⁇ R 1 /R 2 ⁇ -1.2.
  • the sum ⁇ CT of the total optical length TTL of the optical lens and the center thicknesses of the first lens to the seventh lens along the optical axis satisfies: 0.5 ⁇ CT/TTL ⁇ 0.8.
  • the optical lens of this application achieves the advantages of large field of view, large aperture and miniaturization by reasonably matching the lens shape and optical power combination between each lens. .
  • Figure 1 is a schematic structural diagram of an optical lens according to Embodiment 1 of the present application.
  • Figure 2 is a field curvature curve diagram of the optical lens in Embodiment 1 of the present application.
  • Figure 3 is a F-tan ⁇ distortion curve of the optical lens in Example 1 of the present application.
  • Figure 4 is a relative illumination curve diagram of the optical lens in Example 1 of the present application.
  • Figure 5 is the MTF curve of the optical lens in Example 1 of the present application.
  • Figure 6 is an axial aberration curve diagram of the optical lens in Example 1 of the present application.
  • FIG. 7 is a vertical axis chromatic aberration curve diagram of the optical lens in Example 1 of the present application.
  • Figure 8 is a schematic structural diagram of an optical lens according to Embodiment 2 of the present application.
  • Figure 9 is a field curvature curve diagram of the optical lens in Embodiment 2 of the present application.
  • FIG10 is a F-tan ⁇ distortion curve diagram of the optical lens in Example 2 of the present application.
  • Figure 11 is a relative illumination curve diagram of the optical lens in Example 2 of the present application.
  • Figure 12 is the MTF curve of the optical lens in Example 2 of the present application.
  • Figure 13 is a graph of the axial aberration of the optical lens in Example 2 of the present application.
  • Figure 14 is a vertical axis chromatic aberration curve diagram of the optical lens in Example 2 of the present application.
  • Figure 15 is a schematic structural diagram of an optical lens according to Embodiment 3 of the present application.
  • Figure 16 is a field curvature curve diagram of the optical lens in Embodiment 3 of the present application.
  • FIG17 is a F-tan ⁇ distortion curve diagram of the optical lens in Example 3 of the present application.
  • Figure 18 is a relative illumination curve diagram of the optical lens in Example 3 of the present application.
  • Figure 19 is the MTF curve of the optical lens in Example 3 of the present application.
  • Figure 20 is an axial aberration curve diagram of the optical lens in Example 3 of the present application.
  • Figure 21 is a vertical axis chromatic aberration curve diagram of the optical lens in Example 3 of the present application.
  • Figure 22 is a schematic structural diagram of an optical lens according to Embodiment 4 of the present application.
  • Figure 23 is a field curvature curve diagram of the optical lens in Embodiment 4 of the present application.
  • Figure 24 is the F-tan ⁇ distortion curve of the optical lens in Example 4 of the present application.
  • Figure 25 is a relative illumination curve diagram of the optical lens in Example 4 of the present application.
  • FIG26 is an MTF curve diagram of the optical lens in Example 4 of the present application.
  • Figure 27 is an axial aberration curve diagram of the optical lens in Example 4 of the present application.
  • Figure 28 is a vertical axis chromatic aberration curve diagram of the optical lens in Example 4 of the present application.
  • Figure 29 is a schematic structural diagram of an optical lens according to Embodiment 5 of the present application.
  • Figure 30 is a field curvature curve diagram of the optical lens in Embodiment 5 of the present application.
  • Figure 31 is the F-tan ⁇ distortion curve of the optical lens in Example 5 of the present application.
  • Figure 32 is a relative illumination curve diagram of the optical lens in Example 5 of the present application.
  • Figure 33 is the MTF curve of the optical lens in Example 5 of the present application.
  • Figure 34 is a graph of the axial aberration of the optical lens in Example 5 of the present application.
  • Figure 35 is a vertical axis chromatic aberration curve of the optical lens in Example 5 of the present application.
  • first, second, third, etc. are only used to distinguish one feature from another feature and do not represent any limitation on the feature. Therefore, the first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.
  • the thickness, size and shape of the lenses have been slightly exaggerated for convenience of illustration.
  • the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings.
  • the drawings are examples only and are not strictly to scale.
  • the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the concave surface position is not defined, it means that the lens surface is at least in the paraxial area. Concave. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging surface is called the image side of the lens.
  • the optical lens according to the embodiment of the present application includes in order from the object side to the image side: a first lens, an aperture, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens.
  • the first lens may have a negative optical power, which is beneficial to reduce the inclination angle of the incident light, thereby effectively sharing the large field of view on the object side.
  • the object side and image side of the first lens are both concave, which can reduce the effective working aperture of the first lens and prevent the light from diverging too much, resulting in an excessively large aperture of the lens behind the optical lens.
  • the second lens may have positive refractive power, which is conducive to condensing light while reducing the deflection angle of light, allowing for a smooth transition of light trends.
  • the image side of the second lens is convex, which is conducive to the emission of light from the edge field of view and transmits as much light as possible to the rear end of the optical lens.
  • the third lens may have positive refractive power, which is conducive to condensing light while reducing the deflection angle of light, allowing for a smooth transition of light trends.
  • the object side and image side of the third lens are both convex, which can reduce the coma aberration produced by the third lens itself and improve the imaging quality of the optical lens.
  • the object side of the sixth lens is convex, which is beneficial to collecting more incident light and improving the relative illumination of the optical lens, so that the brightness of the optical lens at the image plane is improved to avoid the occurrence of vignetting.
  • the fourth lens and the fifth lens can be cemented to form a cemented lens, which can effectively correct the chromatic aberration of the optical lens, reduce the decentering sensitivity of the optical lens, balance the aberration of the optical lens, and improve the imaging quality of the optical lens. ; It can also reduce the assembly sensitivity of the optical lens, thereby reducing the difficulty of processing the optical lens and improving the assembly yield of the optical lens.
  • an aperture for limiting the light beam may be disposed between the first lens and the second lens, and the aperture may be disposed near the object side of the second lens, which can reduce the generation of optical lens ghosts, and It is helpful to condense the light entering the optical system and reduce the rear port diameter of the optical lens.
  • the aperture value FNO of the optical lens satisfies: FNO ⁇ 1.64. Meeting the above range is conducive to achieving large aperture characteristics and ensuring clear images in low-light environments or at night.
  • the maximum field of view FOV of the optical lens satisfies: 100° ⁇ FOV. Meeting the above range is conducive to achieving wide-angle characteristics, thereby being able to obtain more scene information and meet the needs of large-scale detection.
  • the incident angle CRA of the chief ray of the maximum field of view of the optical lens on the image plane satisfies: 10° ⁇ CRA ⁇ 15°. Meeting the above range can make the allowable error value between the CRA of the optical lens and the CRA of the chip photosensitive element larger, improving the adaptability of the optical lens to the image sensor.
  • the total optical length TTL and the effective focal length f of the optical lens satisfy: 4.0 ⁇ TTL/f ⁇ 5.0. Meeting the above range can effectively limit the length of the lens and achieve miniaturization of the optical lens.
  • the total optical length TTL of the optical lens and the real image height IH corresponding to the maximum field of view satisfy: 2.5 ⁇ TTL/IH. Meeting the above range will help shorten the total length of the optical lens while taking into account good imaging quality, and achieve miniaturization of the optical lens.
  • the optical back focus BFL and the effective focal length f of the optical lens satisfy: 0.5 ⁇ BFL/f. Meeting the above range is helpful to achieve a balance between good imaging quality and optical back focus length that is easy to assemble, ensuring the imaging quality of the optical lens while reducing the difficulty of the camera module assembly process.
  • the entrance pupil diameter EPD of the optical lens and the real image height IH corresponding to the maximum field of view satisfy: 2.5 ⁇ IH/EPD ⁇ 3.0. Meeting the above range can increase the width of the light beam incident on the optical lens, thereby improving the brightness of the optical lens at the image plane and avoiding vignetting.
  • the maximum half field angle HFOV of the optical lens and the incident angle CRA of the principal ray of the maximum field angle on the image plane satisfy: 3.0 ⁇ HFOV/CRA ⁇ 4.5. Meeting the above range allows the optical lens to achieve a large field of view while incident light can hit the image sensor at an appropriate angle, thereby improving the photosensitive performance of the image sensor and improving the imaging quality of the optical lens.
  • the maximum field of view FOV of the optical lens, the true image height IH corresponding to the maximum field of view, and the effective working aperture D 1 of the object side of the first lens satisfy: D 1 /IH/tan(FOV/2) ⁇ 0.8. If the above range is met, the optical lens can have a large field of view and a large image surface while having a small front port diameter, which is conducive to the miniaturization of the optical lens.
  • the effective focal length f of the optical lens and the focal length f 1 of the first lens satisfy: -1.5 ⁇ f 1 /f ⁇ 0. If the above range is met, the first lens can have appropriate negative power, which is beneficial to reducing the inclination angle of the incident light, thereby effectively sharing the large object-side field of view.
  • the effective focal length f of the optical lens and the focal length f 2 of the second lens satisfy: 0 ⁇ f 2 /f ⁇ 5.0. If the above range is met, the second lens can have an appropriate positive power, which is conducive to condensing light while reducing the deflection angle of light, allowing a smooth transition of light trends, and improving the imaging quality of the optical lens.
  • the effective focal length f of the optical lens and the focal length f 3 of the third lens satisfy: 0 ⁇ f 3 /f ⁇ 3.0. If the above range is met, the third lens can have an appropriate positive power, which is conducive to condensing light while reducing the deflection angle of light, allowing a smooth transition of light trends, and improving the imaging quality of the optical lens.
  • the effective focal length f of the optical lens and the focal length f 4 of the fourth lens satisfy:
  • the effective focal length f of the optical lens and the focal length f 5 of the fifth lens satisfy:
  • the effective focal length f of the optical lens and the focal length f 6 of the sixth lens satisfy: 1.5 ⁇
  • the effective focal length f of the optical lens and the combined focal length f 23 of the second lens and the third lens satisfy: 0.9 ⁇ f 23 /f ⁇ 1.2. Meeting the above range can effectively correct spherical aberration and coma aberration, making the resolution of the wide-angle lens higher; at the same time, it is conducive to converging edge field light and improving the relative illumination of the optical lens. At the same time, it can shorten the total length of the optical lens and A good balance between image quality.
  • the effective focal length f of the optical lens and the combined focal length f46 of the fourth lens to the sixth lens satisfy: -14.0 ⁇ f46 /f ⁇ -4.0. Meeting the above range can effectively correct various aberrations of the optical system, and in some embodiments, the fourth lens and the fifth lens are glued together with positive and negative optical powers, which can not only correct the aberrations of the fourth lens and the fifth lens, but also correct the chromatic aberration of the optical system, thereby improving the imaging quality of the functional optical lens.
  • the object side curvature radius R 1 and the image side curvature radius R 2 of the first lens satisfy: -5.0 ⁇ R 1 /R 2 ⁇ -1.2. Meeting the above range can effectively reduce the field curvature generated by the first lens itself and improve the imaging quality of the optical lens.
  • the sum ⁇ CT of the total optical length TTL of the optical lens and the central thicknesses of the first to seventh lenses along the optical axis satisfies: 0.5 ⁇ CT/TTL ⁇ 0.8. Meeting the above range can effectively compress the total length of the optical lens, and is beneficial to the structural design and production process of the optical lens.
  • each aspherical surface of the optical lens satisfies the following equation:
  • z is the distance between the surface and the surface vertex in the direction of the optical axis
  • h is the distance from the optical axis to the surface
  • c is the curvature of the surface vertex
  • K is the quadratic surface coefficient
  • A, B, C, D, E, F respectively are second-order, fourth-order, sixth-order, eighth-order, tenth-order, and twelfth-order surface coefficients.
  • the thickness, radius of curvature, and material selection of each lens in the optical lens are different.
  • the following embodiments are only preferred implementations of the present application, but the implementation of the present application is not limited only by the following examples. Any other changes, substitutions, combinations or simplifications that do not deviate from the innovative points of the present application can be made. All replacement methods should be regarded as equivalent and are included in the protection scope of this application.
  • Figure 1 is a schematic structural diagram of an optical lens provided in Embodiment 1 of the present application.
  • the optical lens includes in order from the object side to the imaging surface along the optical axis: a first lens L1, a diaphragm ST, and a second lens L2. , the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the filter G1.
  • the first lens L1 has negative refractive power, and its object side S1 and image side S2 are both concave surfaces;
  • the second lens L2 has positive refractive power, its object side surface S3 is concave, and its image side surface S4 is convex;
  • the third lens L3 has positive refractive power, and its object side S5 and image side S6 are both convex surfaces;
  • the fourth lens L4 has positive refractive power, and its object side S7 and image side S8 are both convex;
  • the fifth lens L5 has negative refractive power, and its object side S9 and image side S10 are both concave;
  • the sixth lens L6 has positive refractive power, and its object side S11 and image side S12 are both convex surfaces;
  • the fourth lens L4 and the fifth lens L5 can be cemented to form a cemented lens
  • the object side S13 and the image side S14 of the filter G1 are both flat;
  • the imaging surface S15 is a flat surface.
  • the surface parameters of the aspherical lens of the optical lens in Example 1 are shown in Table 1-2.
  • FIG2 shows the field curvature curve of Example 1. It can be seen from the figure that the field curvature of the meridional image plane and the sagittal image plane is controlled within ⁇ 0.06 mm, indicating that the optical lens can correct the field curvature well.
  • Figure 3 shows the F-tan ⁇ distortion curve of Embodiment 1. It can be seen from the figure that the F-tan ⁇ distortion of the optical lens is controlled within ⁇ 40%, indicating that the optical lens can better correct the F-tan ⁇ distortion.
  • Figure 4 shows the relative illumination curve of Example 1. It can be seen from the figure that the relative illumination value of the optical lens is still greater than 70% at the maximum half field angle, indicating that the optical lens has good relative illumination.
  • Figure 5 shows the MTF (modulation transfer function) curve of Embodiment 1. It can be seen from the figure that the MTF values of this embodiment are above 0.3 in the entire field of view and in the range of 0 to 160 lp/mm. , the MTF curve decreases evenly and smoothly from the center to the edge of the field of view, and has better imaging quality and better detail resolution in both low and high frequencies.
  • Figure 6 shows the axial aberration curve of Example 1. It can be seen from the figure that the deviation of the axial aberration is controlled within ⁇ 20 ⁇ m, indicating that the optical lens can well correct the axial aberration.
  • Figure 7 shows the vertical axis chromatic aberration curve of Embodiment 1. It can be seen from the figure that the vertical axis chromatic aberration of the longest wavelength and the shortest wavelength is controlled within ⁇ 3 ⁇ m, indicating that the optical lens can effectively correct the chromatic aberration of the edge field of view and Secondary spectrum of the entire image plane.
  • FIG 8 is a schematic structural diagram of an optical lens provided in Embodiment 2 of the present application.
  • the optical lens includes in order from the object side to the imaging surface along the optical axis: a first lens L1, a diaphragm ST, and a second lens L2. , the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the filter G1.
  • the first lens L1 has negative refractive power, and its object side S1 and image side S2 are both concave surfaces;
  • the second lens L2 has positive refractive power, its object side S3 is a concave surface, and its image side S4 is a convex surface;
  • the third lens L3 has positive refractive power, and its object side S5 and image side S6 are both convex surfaces;
  • the fourth lens L4 has positive refractive power, and its object side S7 and image side S8 are both convex;
  • the fifth lens L5 has negative refractive power, and its object side S9 and image side S10 are both concave;
  • the sixth lens L6 has positive refractive power, its object side S11 is a convex surface, and its image side S12 is a concave surface;
  • the fourth lens L4 and the fifth lens L5 can be cemented to form a cemented lens.
  • Figure 9 shows the field curvature curve of Embodiment 2. It can be seen from the figure that the field curvature of the meridional image plane and the sagittal image plane is controlled within ⁇ 0.04mm, indicating that the optical lens can excellently correct field curvature.
  • Figure 10 shows the F-tan ⁇ distortion curve of Embodiment 2. It can be seen from the figure that the F-tan ⁇ distortion of the optical lens is controlled within ⁇ 40%, indicating that the optical lens can better correct the F-tan ⁇ distortion.
  • Figure 11 shows the relative illumination curve of Example 2. It can be seen from the figure that the relative illumination value of the optical lens is still greater than 70% at the maximum half field angle, indicating that the optical lens has good relative illumination.
  • Figure 12 shows the MTF (modulation transfer function) curve of Embodiment 2. It can be seen from the figure that the MTF values of this embodiment are above 0.3 in the entire field of view and in the range of 0 to 160 lp/mm. , the MTF curve decreases evenly and smoothly from the center to the edge of the field of view, and has better imaging quality and better detail resolution in both low and high frequencies.
  • FIG. 13 shows the axial aberration curve of Example 2. It can be seen from the figure that the offset of the axial aberration is controlled within ⁇ 40 ⁇ m, indicating that the optical lens can correct the axial aberration well.
  • Figure 14 shows the vertical axis chromatic aberration curve of Example 2. It can be seen from the figure that the vertical axis chromatic aberration of the longest wavelength and the shortest wavelength is controlled within ⁇ 3 ⁇ m, indicating that the optical lens can effectively correct the chromatic aberration of the edge field of view and Secondary spectrum of the entire image plane.
  • Figure 15 is a schematic structural diagram of an optical lens provided in Embodiment 3 of the present application.
  • the optical lens includes in order along the optical axis from the object side to the imaging surface: a first lens L1, a diaphragm ST, and a second lens L2. , the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the filter G1.
  • the first lens L1 has negative refractive power, and its object side S1 and image side S2 are both concave surfaces;
  • the second lens L2 has positive refractive power, its object side S3 is a concave surface, and its image side S4 is a convex surface;
  • the third lens L3 has positive refractive power, and its object side S5 and image side S6 are both convex surfaces;
  • the fourth lens L4 has negative refractive power, and its object side S7 and image side S8 are both concave;
  • the fifth lens L5 has positive refractive power, and its object side S9 and image side S10 are both convex surfaces;
  • the sixth lens L6 has negative refractive power, its object side S11 is a convex surface, and its image side S12 is a concave surface.
  • Figure 16 shows the field curvature curve of Embodiment 3. It can be seen from the figure that the field curvature of the meridional image plane and the sagittal image plane is controlled within ⁇ 0.06 mm, indicating that the optical lens can well correct the field curvature.
  • Figure 17 shows the F-tan ⁇ distortion curve of Example 3. It can be seen from the figure that the F-tan ⁇ distortion of the optical lens is controlled within ⁇ 40%, indicating that the optical lens can better correct the F-tan ⁇ distortion.
  • Figure 18 shows the relative illumination curve of Example 3. It can be seen from the figure that the relative illumination value of the optical lens is still greater than 70% at the maximum half field angle, indicating that the optical lens has good relative illumination.
  • Figure 19 shows the MTF (modulation transfer function) curve of Embodiment 3. It can be seen from the figure that the MTF values of this embodiment are above 0.3 in the entire field of view and in the range of 0 to 160 lp/mm. , the MTF curve decreases evenly and smoothly from the center to the edge of the field of view, and has better imaging quality and better detail resolution in both low and high frequencies.
  • Figure 20 shows the axial aberration curve of Example 3. It can be seen from the figure that the deviation of the axial aberration is controlled within ⁇ 40 ⁇ m, indicating that the optical lens can better correct the axial aberration.
  • Figure 21 shows the vertical axis chromatic aberration curve of Example 3. It can be seen from the figure that the vertical axis chromatic aberration of the longest wavelength and the shortest wavelength is controlled within ⁇ 4 ⁇ m, indicating that the optical lens can effectively correct the chromatic aberration of the edge field of view and Secondary spectrum of the entire image plane.
  • FIG 22 is a schematic structural diagram of an optical lens provided in Embodiment 4 of the present application.
  • the optical lens includes in order from the object side to the imaging surface along the optical axis: a first lens L1, an aperture ST, and a second lens L2. , the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the filter G1.
  • the first lens L1 has negative refractive power, and its object side S1 and image side S2 are both concave surfaces;
  • the second lens L2 has positive refractive power, and its object-side surface S3 and image-side surface S4 are both convex surfaces;
  • the third lens L3 has positive refractive power, and its object side S5 and image side S6 are both convex surfaces;
  • the fourth lens L4 has negative refractive power, and its object-side surface S7 and image-side surface S8 are both concave;
  • the fifth lens L5 has positive refractive power, and its object side S9 and image side S10 are both convex surfaces;
  • the sixth lens L6 has negative refractive power, and its object-side surface S11 is convex, and its image-side surface S12 is concave.
  • Figure 23 shows the field curvature curve of Embodiment 4. It can be seen from the figure that the field curvature of the meridional image plane and the sagittal image plane is controlled within ⁇ 0.11mm, indicating that the optical lens can better correct the field curvature.
  • Figure 24 shows the F-tan ⁇ distortion curve of Embodiment 4. It can be seen from the figure that the F-tan ⁇ distortion of the optical lens is controlled within ⁇ 40%, indicating that the optical lens can better correct the F-tan ⁇ distortion.
  • FIG. 25 shows the relative illumination curve of Example 4. It can be seen from the figure that the relative illumination value of the optical lens is still greater than 70% at the maximum half field of view angle, indicating that the optical lens has good relative illumination.
  • FIG26 shows the MTF (Modulation Transfer Function) curve of Example 4. It can be seen from the figure that the MTF value of this embodiment is above 0.3 in the entire field of view. In the range of 0 to 160 lp/mm, the MTF curve decreases evenly and smoothly from the center to the edge of the field of view, and has good imaging quality and good detail resolution capability in both low-frequency and high-frequency conditions.
  • MTF Modulation Transfer Function
  • Figure 27 shows the axial aberration curve of Example 4. It can be seen from the figure that the deviation of the axial aberration is controlled within ⁇ 40 ⁇ m, indicating that the optical lens can better correct the axial aberration.
  • Figure 28 shows the vertical axis chromatic aberration curve of Example 4. It can be seen from the figure that the vertical axis chromatic aberration of the longest wavelength and the shortest wavelength is controlled within ⁇ 3 ⁇ m, indicating that the optical lens can effectively correct the chromatic aberration of the edge field of view and Secondary spectrum of the entire image plane.
  • Figure 29 is a schematic structural diagram of an optical lens provided in Embodiment 5 of the present application.
  • the optical lens includes in order from the object side to the imaging surface along the optical axis: a first lens L1, an aperture ST, and a second lens L2. , the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the filter G1.
  • the first lens L1 has negative refractive power, and its object side S1 and image side S2 are both concave surfaces;
  • the second lens L2 has positive refractive power, and its object side S3 and image side S4 are both convex surfaces;
  • the third lens L3 has positive refractive power, and its object side S5 and image side S6 are both convex surfaces;
  • the fourth lens L4 has negative refractive power, and its object side S7 and image side S8 are both concave;
  • the fifth lens L5 has positive refractive power, and its object side S9 and image side S10 are both convex surfaces;
  • the sixth lens L6 has negative refractive power, its object side S11 is a convex surface, and its image side S12 is a concave surface.
  • Figure 30 shows the field curvature curve of Embodiment 5. It can be seen from the figure that the field curvature of the meridional image plane and the sagittal image plane is controlled within ⁇ 0.11mm, indicating that the optical lens can better correct the field curvature.
  • Figure 31 shows the F-tan ⁇ distortion curve of Example 6. It can be seen from the figure that the F-tan ⁇ distortion of the optical lens is controlled within ⁇ 40%, indicating that the optical lens can better correct the F-tan ⁇ distortion.
  • Figure 32 shows the relative illumination curve of Example 5. It can be seen from the figure that the relative illumination value of the optical lens is still greater than 70% at the maximum half field angle, indicating that the optical lens has good relative illumination.
  • Figure 33 shows the MTF (modulation transfer function) curve of Embodiment 5. It can be seen from the figure that the MTF values of this embodiment are above 0.3 in the entire field of view and in the range of 0 to 160 lp/mm. , the MTF curve decreases evenly and smoothly from the center to the edge of the field of view, and has better imaging quality and better detail resolution in both low and high frequencies.
  • FIG34 shows the axial aberration curve of Example 5. It can be seen from the figure that the offset of the axial aberration is controlled within ⁇ 20 ⁇ m, indicating that the optical lens can correct the axial aberration well.
  • Figure 35 shows the vertical axis chromatic aberration curve of Example 5. It can be seen from the figure that the vertical axis chromatic aberration of the longest wavelength and the shortest wavelength is controlled within ⁇ 4 ⁇ m, indicating that the optical lens can effectively correct the chromatic aberration of the edge field of view and Secondary spectrum of the entire image plane.
  • Table 6 shows the optical characteristics corresponding to each of the above embodiments, including the effective focal length f, total optical length TTL, aperture value FNO, true image height IH and maximum field of view FOV of the optical lens, as well as the relationship between each embodiment and each embodiment.
  • the optical lens of the embodiment of the present application realizes the advantages of having a large field of view, a large aperture and being compact at the same time by reasonably matching the lens shape and optical power combination between the lenses.

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

Abstract

L'invention concerne une lentille optique comprenant un total de six éléments de lentille, qui sont agencés séquentiellement d'un côté objet à une surface d'imagerie le long d'un axe optique : un premier élément de lentille (L1) ayant une puissance focale négative, une surface côté objet (S1) et une surface côté image (S2) de celui-ci étant toutes deux des surfaces concaves ; une butée (ST) ; un second élément de lentille (L2) ayant une puissance focale positive, une surface côté image (S4) de celui-ci étant une surface convexe ; un troisième élément de lentille (L3) ayant une puissance focale positive, une surface côté objet (S5) et une surface côté image (S6) de celui-ci étant toutes deux des surfaces convexes ; un quatrième élément de lentille (L4) ayant une puissance focale ; un cinquième élément de lentille (L5) ayant une puissance focale ; et un sixième élément de lentille (L6) ayant une puissance focale, une surface côté objet (S11) de celui-ci étant une surface convexe, le champ de vision maximal (FOV) de la lentille optique, la hauteur d'image réelle (IH) correspondant au FOV maximal, et l'ouverture utile efficace (D1) de la surface côté objet (S1) du premier élément de lentille (L1) satisfaisant à : D1/IH/tan (FOV/2) < 0,8. La lentille optique présente les avantages d'un grand champ de vision, d'une grande ouverture et d'une miniaturisation.
PCT/CN2023/119744 2022-09-22 2023-09-19 Lentille optique WO2024061220A1 (fr)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018136583A (ja) * 2018-06-11 2018-08-30 マクセル株式会社 撮像レンズ系及び撮像装置
CN109932807A (zh) * 2017-12-18 2019-06-25 宁波舜宇车载光学技术有限公司 光学镜头
CN112748553A (zh) * 2021-03-03 2021-05-04 浙江舜宇光学有限公司 光学成像镜头
CN113960773A (zh) * 2021-12-22 2022-01-21 江西联创电子有限公司 光学成像镜头及成像设备
CN114815149A (zh) * 2018-11-28 2022-07-29 宁波舜宇车载光学技术有限公司 光学镜头及成像设备
CN115236840A (zh) * 2022-09-22 2022-10-25 江西联创电子有限公司 光学镜头

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI533021B (zh) * 2015-04-02 2016-05-11 大立光電股份有限公司 光學鏡頭、取像裝置及電子裝置
CN109001886B (zh) * 2017-06-06 2021-09-10 宁波舜宇车载光学技术有限公司 光学镜头
CN112698502B (zh) * 2020-12-30 2022-04-12 江西联创电子有限公司 光学成像镜头及成像设备
CN113253433B (zh) * 2021-07-05 2021-09-17 江西联创电子有限公司 光学成像镜头及成像设备
CN114114651B (zh) * 2022-01-27 2022-07-05 江西联创电子有限公司 光学镜头
CN114326061B (zh) * 2022-03-14 2022-08-16 江西联创电子有限公司 光学成像镜头

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109932807A (zh) * 2017-12-18 2019-06-25 宁波舜宇车载光学技术有限公司 光学镜头
JP2018136583A (ja) * 2018-06-11 2018-08-30 マクセル株式会社 撮像レンズ系及び撮像装置
CN114815149A (zh) * 2018-11-28 2022-07-29 宁波舜宇车载光学技术有限公司 光学镜头及成像设备
CN112748553A (zh) * 2021-03-03 2021-05-04 浙江舜宇光学有限公司 光学成像镜头
CN113960773A (zh) * 2021-12-22 2022-01-21 江西联创电子有限公司 光学成像镜头及成像设备
CN115236840A (zh) * 2022-09-22 2022-10-25 江西联创电子有限公司 光学镜头

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