Shooting optical lens

Abstract

The utility model relates to the field of optical lenses, and discloses a camera shooting optical lens, which comprises seven lenses in sequence from an object side to an image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power and a fifth lens with negative refractive power, a sixth lens element with positive refractive power; and a seventh lens element with negative refractive power. -18.000 < = f1 / f + f2 / f + f3 / f < =-8.000 is satisfied; 1.800 < = f4 / f + f5 / f + f6 / f + f7 / f < = 0.600; and-0.080 < = d0 / d1 < =-0.050.

Description

Technical Field

[0001] The utility model relates to the field of optical lenses, and particularly to an imaging optical lens applicable to portable terminal devices such as smart phones and digital cameras, as well as imaging devices such as monitors, PC lenses, and vehicle-mounted lenses. Background Art

[0002] In recent years, with the rise of various intelligent devices, the demand for miniaturized imaging optical lenses has been increasing day by day. Moreover, due to the reduction of the pixel size of the photosensitive device, and coupled with the current development trend of electronic products towards a good-function, thin, light, and portable appearance, therefore, a miniaturized imaging optical lens with good imaging quality has become the mainstream in the current market. To obtain better imaging quality, a multi-lens structure is mostly adopted. And, with the development of technology and the increasing diversification of user needs, in the case where the pixel area of the photosensitive device is continuously reduced and the system's requirements for imaging quality are continuously improved, a seven-lens structure has gradually appeared in lens design. There is an urgent need for an optical imaging lens with excellent optical performance, miniaturization, wide-angle, and sufficient aberration correction. Summary of the Utility Model

[0003] Aiming at the above problems, the purpose of the present utility model is to provide an imaging optical lens, which has excellent optical performance while meeting the design requirements of miniaturization, wide-angle, and sufficient aberration correction.

[0004] To achieve the above purpose, the technical solution of the present utility model provides an imaging optical lens, which includes an aperture stop and seven lenses in total. The seven lenses are, in order from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power;

[0005] The object side surface of the first lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the second lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the third lens is concave at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the fourth lens is convex at the paraxial region; the object side surface of the fifth lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the sixth lens is convex at the paraxial region, and the image side surface is convex at the paraxial region; the object side surface of the seventh lens is convex at the paraxial region, and the image side surface is concave at the paraxial region;

[0006] Wherein, the focal length of the imaging optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, the axial distance from the aperture stop to the object side surface of the first lens is d0, the axial thickness of the first lens is d1, the central curvature radius of the object side surface of the fifth lens at the paraxial region is R9, the central curvature radius of the image side surface of the fifth lens at the paraxial region is R10, the central curvature radius of the image side surface of the sixth lens at the paraxial region is R12, the central curvature radius of the object side surface of the seventh lens at the paraxial region is R13, the central curvature radius of the image side surface of the seventh lens at the paraxial region is R14, and the following relational expressions are satisfied:

[0007] -18.000 ≤ f1 / f + f2 / f + f3 / f ≤ -8.000;

[0008] -1.800 ≤ f4 / f + f5 / f + f6 / f + f7 / f ≤ -0.600;

[0009] -0.080 ≤ d0 / d1 ≤ -0.050;

[0010] -8.000 ≤ R12 / f6 ≤ -2.500;

[0011] -1.000 ≤ f4 / f5 ≤ -0.500;

[0012] 1.700 ≤ (R9 + R10) / f ≤ 2.600;

[0013] 2.000 ≤ R13 / R14 ≤ 6.000.

[0014] Preferably, the following relational expression is satisfied: -15.000 ≤ f1 / f + f2 / f + f3 / f ≤ -9.000.

[0015] Preferably, the following relational expression is satisfied: -1.500 ≤ f4 / f + f5 / f + f6 / f + f7 / f ≤ -0.700.

[0016] Preferably, the axial distance between the image side surface of the fourth lens and the object side surface of the fifth lens is d8, the overall optical length of the imaging optical lens is TTL, and the following relational expression is satisfied: 0.065 ≤ d8 / TTL ≤ 0.120.

[0017] Preferably, the first lens is a glass lens.

[0018] To achieve the above object, the technical solution of the present utility model further provides an imaging optical lens. The imaging optical lens includes an aperture stop and seven lenses in total. The seven lenses are, in order from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power;

[0019] The object side surface of the first lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the second lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the third lens is concave at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the fourth lens is convex at the paraxial region; the object side surface of the fifth lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the sixth lens is convex at the paraxial region, and the image side surface is convex at the paraxial region; the object side surface of the seventh lens is convex at the paraxial region, and the image side surface is concave at the paraxial region;

[0020] Among them, the focal length of the imaging optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, the axial distance from the aperture stop to the object side surface of the first lens is d0, the axial thickness of the first lens is d1, the central curvature radius of the object side surface of the first lens at the paraxial region is R1, the central curvature radius of the image side surface of the first lens at the paraxial region is R2, the central curvature radius of the object side surface of the seventh lens at the paraxial region is R13, the central curvature radius of the image side surface of the seventh lens at the paraxial region is R14, the sum of the axial thicknesses of each lens from the first lens to the seventh lens is ∑d, the sum of the lengths of the air spaces on the optical axis between any two adjacent lenses from the first lens to the seventh lens is ∑D, and the following relational expressions are satisfied:

[0021] -18.000 ≤ f1 / f + f2 / f + f3 / f ≤ -8.000;

[0022] -1.800 ≤ f4 / f + f5 / f + f6 / f + f7 / f ≤ -0.600;

[0023] -0.080 ≤ d0 / d1 ≤ -0.050;

[0024] 2.600 ≤ f1 / R1 + f1 / R2 ≤ 4.800;

[0025] 0.600 ≤ (R13 + R14) / f ≤ 2.600;

[0026] 0.600 ≤ ∑D / ∑d ≤ 0.950.

[0027] Preferably, the following relational expression is satisfied: -15.000 ≤ f1 / f + f2 / f + f3 / f ≤ -9.000.

[0028] Preferably, the following relational expression is satisfied: -1.500 ≤ f4 / f + f5 / f + f6 / f + f7 / f ≤ -0.700.

[0029] Preferably, the following relational expression is satisfied: 3.400 ≤ f1 / R1 + f1 / R2 ≤ 4.000.

[0030] Preferably, the following relational expression is satisfied: 0.700 ≤ (R13 + R14) / f ≤ 2.200.

[0031] Preferably, the following relational expression is satisfied: 0.630 ≤ ∑D / ∑d ≤ 0.920.

[0032] Preferably, the combined focal length of the first lens and the second lens is f12, the central curvature radius of the image side of the second lens at the paraxial region is R4, and the following relational expression is satisfied: -3.000 ≤ f12 / (R1 - R4) ≤ -1.300.

[0033] Preferably, the following relational expression is satisfied: -2.600 ≤ f12 / (R1 - R4) ≤ -1.500.

[0034] Preferably, the following relational expression is satisfied: 0.007 ≤ d0 / (R1 - R2) ≤ 0.020.

[0035] Preferably, the following relational expression is satisfied: 0.008 ≤ d0 / (R1 - R2) ≤ 0.018.

[0036] Preferably, the first lens is a glass lens.

[0037] The beneficial effects of the present utility model are as follows: The imaging optical lens according to the present utility model has excellent optical performance, and has the characteristics of miniaturization, wide-angle, and sufficient correction of aberration, and is particularly suitable for mobile phone imaging lens assemblies, WEB imaging lenses, and vehicle-mounted lenses composed of imaging elements such as CCD and CMOS for high pixels. Description of the Drawings

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts, where:

[0039] Figure 1 is a schematic structural diagram of the imaging optical lens according to the first embodiment of the present utility model;

[0040] Figure 2 is Figure 1 a schematic diagram of the axial aberration of the imaging optical lens shown;

[0041] Figure 3 is Figure 1 a schematic diagram of the lateral chromatic aberration of the imaging optical lens shown;

[0042] Figure 4 is Figure 1 a schematic diagram of the field curvature and distortion of the imaging optical lens shown;

[0043] Figure 5 is a schematic structural diagram of the imaging optical lens according to the second embodiment of the present utility model;

[0044] Figure 6 is Figure 5 a schematic diagram of the axial aberration of the imaging optical lens shown;

[0045] Figure 7 is Figure 5 a schematic diagram of the lateral chromatic aberration of the imaging optical lens shown;

[0046] Figure 8 is Figure 5 a schematic diagram of the field curvature and distortion of the imaging optical lens shown;

[0047] Figure 9 is a schematic structural diagram of the imaging optical lens according to the third embodiment of the present utility model;

[0048] Figure 10 is Figure 9 a schematic diagram of the axial aberration of the imaging optical lens shown;

[0049] Figure 11 is Figure 9 a schematic diagram of the lateral chromatic aberration of the imaging optical lens shown;

[0050] Figure 12 is Figure 9 a schematic diagram of the field curvature and distortion of the imaging optical lens shown;

[0051] Figure 13 is a schematic structural diagram of the imaging optical lens according to the fourth embodiment of the present utility model;

[0052] Figure 14 is Figure 13 a schematic diagram of the axial aberration of the imaging optical lens shown;

[0053] Figure 15 isFigure 13 Schematic diagram of longitudinal chromatic aberration of the shown imaging optical lens;

[0054] Figure 16 is Figure 13 Schematic diagram of field curvature and distortion of the shown imaging optical lens. Specific embodiments

[0055] To make the objectives, technical solutions and advantages of the present utility model clearer, the following will elaborate on the various embodiments of the present utility model in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that in the various embodiments of the present utility model, many technical details are presented for the readers to better understand the present utility model. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed by the present utility model can still be implemented.

[0056] Referring to the attached Figure 1-16 , the technical solution of the present utility model provides an imaging optical lens 10, 20, 30, 40. Figure 1 , 5 , as shown in FIGS. 9 and 13 of the present utility model, the imaging optical lens 10, 20, 30, 40 includes a total of seven lenses. Specifically, the imaging optical lens, from the object side to the image side in sequence: aperture stop S1, first lens L1, second lens L2, third lens L3, aperture stop S1, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7. Optical elements such as an optical filter (filter) GF can be provided between the seventh lens L7 and the image plane Si.

[0057] The first lens L1 is a glass lens, the second lens L2 is a plastic lens, the third lens L3 is a plastic lens, the fourth lens L4 is a plastic lens, the fifth lens L5 is a plastic lens, the sixth lens L6 is a plastic lens, and the seventh lens L7 is a plastic lens. Each lens can also be made of other materials.

[0058] The object side surfaces and image side surfaces of the first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, and seventh lens L7 are all aspherical surfaces.

[0059] The refractive powers of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 are positive, negative, negative, positive, negative, positive, and negative, respectively. The object side of the first lens L1 is convex near the optical axis, and the image side is concave near the optical axis. The object side of the second lens L2 is convex near the optical axis, and the image side is concave near the optical axis. The object side of the third lens L3 is concave near the optical axis, and the image side is concave near the optical axis. The object side of the fourth lens L4 is convex near the optical axis, and the image side of the fourth lens L4 can be convex or concave near the optical axis. The object side of the fifth lens L5 is convex near the optical axis, and the image side is concave near the optical axis. The object side of the sixth lens L6 is convex near the optical axis, and the image side of the sixth lens L6 is convex near the optical axis. The object side of the seventh lens L7 is convex near the optical axis, and the image side is concave near the optical axis.

[0060] Define the focal length of the imaging optical lens as f, the focal length of the first lens L1 as f1, the focal length of the second lens L2 as f2, and the focal length of the third lens L3 as f3. The following relationship is satisfied: -18.000 ≤ f1 / f + f2 / f + f3 / f ≤ -8.000. Within this range, by reasonably controlling the optical powers of the first three lenses, it is beneficial to increase the field of view angle and achieve wide-angleization. Further satisfying, -15.000 ≤ f1 / f + f2 / f + f3 / f ≤ -9.000.

[0061] Define the focal length of the fourth lens L4 as f4, the focal length of the fifth lens L5 as f5, the focal length of the sixth lens L6 as f6, and the focal length of the seventh lens L7 as f7. The following relationship is satisfied: -1.800 ≤ f4 / f + f5 / f + f6 / f + f7 / f ≤ -0.600. Within this range, by reasonably controlling the optical powers of the last four lenses, it is beneficial to correct aberrations while shortening the overall optical length. Further satisfying, -1.500 ≤ f4 / f + f5 / f + f6 / f + f7 / f ≤ -0.700.

[0062] Define the axial distance from the aperture stop S1 to the object side of the first lens L1 as d0 (if the point on the optical axis of the object side of the first lens L1 is closer to the object side than the center point of the aperture stop S1, d0 is negative; if the point on the optical axis of the object side of the first lens L1 is closer to the image side than the center point of the aperture stop S1, d0 is positive), and the axial thickness of the first lens L1 as d1. The following relationship is satisfied: -0.080 ≤ d0 / d1 ≤ -0.050. Within this range, by reasonably controlling the position of the aperture stop and the axial thickness of the first lens, the imaging optical lens has a high light input amount, and at the same time, the object side of the first lens has a reasonable thickness, which is beneficial to improving the processing yield.

[0063] Define the central curvature radius of the image side of the sixth lens L6 at the paraxial region as R12, and the focal length of the sixth lens L6 as f6. The following relationship is satisfied: -8.000 ≤ R12 / f6 ≤ -2.500. Within this range, the influence of astigmatism on the imaging optical lens can be improved, thereby enhancing the imaging quality of the imaging optical lens.

[0064] Define the focal length of the fourth lens L4 as f4 and the focal length of the fifth lens L5 as f5. The following relationship is satisfied: -1.000 ≤ f4 / f5 ≤ -0.500. Within this range, the fifth lens can be configured with an appropriate refractive power to correct the aberration generated by the fourth lens, which helps to improve the imaging quality of the periphery.

[0065] Define the central curvature radius of the object side of the fifth lens L5 at the paraxial region as R9, and the central curvature radius of the image side of the fifth lens L5 at the paraxial region as R10. The focal length of the imaging optical lens is f. The following relationship is satisfied: 1.700 ≤ (R9 + R10) / f ≤ 2.600. Within this range, it is convenient to adjust the optical power of the fifth lens, so as to facilitate the fifth lens to correct the axial chromatic aberration and lateral chromatic aberration after the light passes through the fourth lens, and improve the imaging quality.

[0066] Define the central curvature radius of the object side of the seventh lens L7 at the paraxial region as R13, and the central curvature radius of the image side of the seventh lens L7 at the paraxial region as R14. The following relationship is satisfied: 2.000 ≤ R13 / R14 ≤ 6.000. By controlling the ratio of the central curvature radius of the object side of the seventh lens at the paraxial region to the central curvature radius of the image side of the seventh lens at the paraxial region, within this range, the processability of the seventh lens can be ensured, the aberration of the system can be reduced, and the image quality can be improved.

[0067] Define the on-axis distance between the image side of the fourth lens L4 and the object side of the fifth lens L5 as d8, and the overall optical length of the imaging optical lens as TTL. The following relationship is satisfied: 0.065 ≤ d8 / TTL ≤ 0.120. Within this range, it is beneficial to shorten the overall optical length of the imaging optical lens.

[0068] Define the central curvature radius of the object side of the first lens L1 at the paraxial region as R1, and the central curvature radius of the image side of the first lens L1 at the paraxial region as R2. The focal length of the first lens L1 is f1. The following relationship is satisfied: 2.600 ≤ f1 / R1 + f1 / R2 ≤ 4.800. Within this range, the surface shape and refractive power of the first lens can be adjusted, which helps to compress the volume and increase the viewing angle. Further satisfy 3.400 ≤ f1 / R1 + f1 / R2 ≤ 4.000.

[0069] Define the central curvature radius of the object side of the seventh lens L7 at the paraxial region as R13, and the central curvature radius of the image side of the seventh lens L7 at the paraxial region as R14. The focal length of the camera optical lens is f. The following relationship is satisfied: 0.600 ≤ (R13 + R14) / f ≤ 2.600. Within this range, by reasonably controlling the relationship between the central curvature radius at the paraxial region of the seventh lens and the focal length, it is beneficial for the seventh lens to better correct aberration and improve the imaging quality of the camera optical lens. Further satisfy 0.700 ≤ (R13 + R14) / f ≤ 2.200.

[0070] Define the sum of the axial thicknesses of the lenses from the first lens L1 to the seventh lens L7 as ∑d, and the sum of the lengths of the air spaces on the optical axis between any two adjacent lenses among the first lens L1 to the seventh lens L7 as ∑D. The following relationship is satisfied: 0.600 ≤ ∑D / ∑d ≤ 0.950. Within this range, by reasonably controlling the air spaces between adjacent lenses and the axial thicknesses of the lenses, it is beneficial to shorten the overall optical length and achieve ultra-thinness. Further satisfy 0.630 ≤ ∑D / ∑d ≤ 0.920.

[0071] Define the combined focal length of the first lens L1 and the second lens L2 as f12, and the central curvature radius of the image side of the second lens L2 at the paraxial region as R4. The following relationship is satisfied: -3.000 ≤ f12 / (R1 - R4) ≤ -1.300. Within this range, by reasonably configuring the combined focal length and surface shape of the first lens and the second lens, chromatic aberration can be eliminated, spherical aberration can be reduced, and astigmatism can be corrected simultaneously to improve the resolution. Further satisfy -2.600 ≤ f12 / (R1 - R4) ≤ -1.500.

[0072] Define the central curvature radius of the object side of the first lens L1 at the paraxial region as R1, and the central curvature radius of the image side of the first lens L1 at the paraxial region as R2. The axial distance from the aperture stop to the object side of the first lens is d0. The following relationship is satisfied: 0.007 ≤ d0 / (R1 - R2) ≤ 0.020. Within this range, the aperture stop protrudes, and the external space of the aperture is larger, which is beneficial for the structural design of the variable aperture. Further satisfy 0.008 ≤ d0 / (R1 - R2) ≤ 0.018.

[0073] Set the first lens L1 as a glass lens. By using the combination of the glass lens and the resin lens, it plays a role in reducing chromatic aberration and improving the performance of the optical camera lens.

[0074] Compared with the prior art, the imaging optical lens provided by the present utility model is configured with -18.000 ≤ f1 / f + f2 / f + f3 / f ≤ -8.000; -1.800 ≤ f4 / f + f5 / f + f6 / f + f7 / f ≤ -0.600; -0.080 ≤ d0 / d1 ≤ -0.050; -8.000 ≤ R12 / f6 ≤ -2.500; -1.000 ≤ f4 / f5 ≤ -0.500; 1.700 ≤ (R9 + R10) / f ≤ 2.600; 2.000 ≤ R13 / R14 ≤ 6.000, which is beneficial to increasing the field of view angle to achieve wide-angleization, and at the same time is beneficial to correcting aberrations; and enables the imaging optical lens to have a high light input amount, and at the same time the object side surface of the first lens has a reasonable thickness, which is beneficial to improving the processing yield. In addition, it is beneficial to improving the influence of astigmatism on the imaging optical lens, thereby improving the imaging quality of the imaging optical lens; the fifth lens is configured with appropriate refractive power to correct aberrations such as axial chromatic aberration and off-axis magnification chromatic aberration, which helps to improve the imaging quality of the periphery; and can ensure the processability of the seventh lens.

[0075] In addition, compared with the prior art, the present utility model can also be configured with -18.000 ≤ f1 / f + f2 / f + f3 / f ≤ -8.000; -1.800 ≤ f4 / f + f5 / f + f6 / f + f7 / f ≤ -0.600; -0.080 ≤ d0 / d1 ≤ -0.050; 2.600 ≤ f1 / R1 + f1 / R2 ≤ 4.800; 0.600 ≤ (R13 + R14) / f ≤ 2.600; 0.600 ≤ ∑D / ∑d ≤ 0.950, which is beneficial to increasing the field of view angle to achieve wide-angleization, and meets miniaturization, and at the same time is beneficial to correcting aberrations and improving the imaging quality of the imaging optical lens; and enables the imaging optical lens to have a high light input amount, and at the same time enables the object side surface of the first lens to have a reasonable thickness, which is beneficial to improving the processing yield.

[0076] The imaging optical lens of the present utility model will be described below with examples. The symbols recorded in each example are as follows. The units of focal length, on-axis distance, central curvature radius, and on-axis thickness are mm.

[0077] TTL: Total optical length (the on-axis distance from the object side surface of the first lens L1 to the image plane Si), unit is mm;

[0078] Aperture number FNO: It refers to the ratio of the effective focal length of the imaging optical lens to the entrance pupil diameter.

[0079] Next, the technical solutions of the present utility model will be specifically described in four embodiments. The technical effects of the present utility model cannot be achieved when exceeding the range of the above conditional formulas.

[0080] (The first embodiment)

[0081] Table 1 and Table 2 show the design data of the imaging optical lens 10 of the first embodiment of the present utility model.

[0082] [Table 1]

[0083]

[0084] Among them, the meanings of the symbols are as follows.

[0085] S1: Aperture stop;

[0086] R: Curvature radius at the center of the optical surface;

[0087] R1: Central curvature radius of the object side of the first lens L1 at paraxial region;

[0088] R2: Central curvature radius of the image side of the first lens L1 at paraxial region;

[0089] R3: Central curvature radius of the object side of the second lens L2 at paraxial region;

[0090] R4: Central curvature radius of the image side of the second lens L2 at paraxial region;

[0091] R5: Central curvature radius of the object side of the third lens L3 at paraxial region;

[0092] R6: Central curvature radius of the image side of the third lens L3 at paraxial region;

[0093] R7: Central curvature radius of the object side of the fourth lens L4 at paraxial region;

[0094] R8: Central curvature radius of the image side of the fourth lens L4 at paraxial region;

[0095] R9: Central curvature radius of the object side of the fifth lens L5 at paraxial region;

[0096] R10: Central curvature radius of the image side of the fifth lens L5 at paraxial region;

[0097] R11: Central curvature radius of the object side of the sixth lens L6 at paraxial region;

[0098] R12: Central curvature radius of the image side of the sixth lens L6 at paraxial region;

[0099] R13: Central curvature radius of the object side of the seventh lens L7 at paraxial region;

[0100] R14: Central curvature radius of the image side of the seventh lens L7 at paraxial region;

[0101] R15: Central curvature radius of the object side of the optical filter GF at paraxial region;

[0102] R16: The central radius of curvature at the image side of the optical filter GF in the paraxial region;

[0103] d: The on-axis thickness of the lens, the on-axis distance between lenses;

[0104] d0: The on-axis distance from the aperture stop S1 to the object side of the first lens L1;

[0105] d1: The on-axis thickness of the first lens L1;

[0106] d2: The on-axis distance from the image side of the first lens L1 to the object side of the second lens L2;

[0107] d3: The on-axis thickness of the second lens L2;

[0108] d4: The on-axis distance from the image side of the second lens L2 to the object side of the third lens L3;

[0109] d5: The on-axis thickness of the third lens L3;

[0110] d6: The on-axis distance from the image side of the third lens L3 to the object side of the fourth lens L4;

[0111] d7: The on-axis thickness of the fourth lens L4;

[0112] d8: The on-axis distance from the image side of the fourth lens L4 to the object side of the fifth lens L5;

[0113] d9: The on-axis thickness of the fifth lens L5;

[0114] d10: The on-axis distance from the image side of the fifth lens L5 to the object side of the sixth lens L6;

[0115] d11: The on-axis thickness of the sixth lens L6;

[0116] d12: The on-axis distance from the image side of the sixth lens L6 to the object side of the seventh lens L7;

[0117] d13: The on-axis thickness of the seventh lens L7;

[0118] d14: The on-axis distance from the image side of the seventh lens L7 to the object side of the optical filter GF;

[0119] d15: The on-axis thickness of the optical filter GF;

[0120] d16: The on-axis distance from the image side of the optical filter GF to the image plane Si;

[0121] nd: The refractive index of the d-line (the d-line is green light with a wavelength of 550 nm);

[0122] nd1: Refractive index of the d-line of the first lens L1;

[0123] nd2: Refractive index of the d-line of the second lens L2;

[0124] nd3: Refractive index of the d-line of the third lens L3;

[0125] nd4: Refractive index of the d-line of the fourth lens L4;

[0126] nd5: Refractive index of the d-line of the fifth lens L5;

[0127] nd6: Refractive index of the d-line of the sixth lens L6;

[0128] nd7: Refractive index of the d-line of the seventh lens L7;

[0129] ndg: Refractive index of the d-line of the optical filter GF;

[0130] vd: Abbe number;

[0131] v1: Abbe number of the first lens L1;

[0132] v2: Abbe number of the second lens L2;

[0133] v3: Abbe number of the third lens L3;

[0134] v4: Abbe number of the fourth lens L4;

[0135] v5: Abbe number of the fifth lens L5;

[0136] v6: Abbe number of the sixth lens L6;

[0137] v7: Abbe number of the seventh lens L7;

[0138] vg: Abbe number of the optical filter GF.

[0139] Table 2 shows the aspherical data of each lens in the imaging optical lens 10 of the first embodiment of the present invention.

[0140]

Table 2

[0141]

[0142]

[0143] For convenience, the aspherical surfaces of each lens use the aspherical surface shown in the following formula (1). However, the present invention is not limited to the aspherical polynomial form represented by this formula (1).

[0144] z = (cr 2 ) / {1 + [1 - (k + 1)(c2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A

[0145] 16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (1)

[0146] Among them, k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 are aspheric coefficients, c is the curvature at the center of the optical surface, r is the perpendicular distance from the point on the aspheric curve to the optical axis, and z is the aspheric depth (the perpendicular distance between the point on the aspheric surface with a distance r from the optical axis and the tangent plane at the vertex of the aspheric surface on the optical axis).

[0147] Figure 2 、 Figure 3 respectively show the axial aberration and magnification chromatic aberration diagrams of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 nm after passing through the imaging optical lens 10 of the first embodiment. Figure 4 shows the field curvature and distortion diagrams of light with a wavelength of 546 nm after passing through the imaging optical lens 10 of the first embodiment. Figure 4 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0148] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 10 is 4.614 mm, the image height IH at a 1.0 field of view is 7.900 mm, the image height at the MIC field of view is 8.100 mm, the FOV in the diagonal direction at a 1.0 field of view is 86.60°, the FOV in the diagonal direction at the MIC field of view is 88.18°. The imaging optical lens 10 meets the design requirements of miniaturization, wide-angle, and sufficient aberration correction, and has excellent optical characteristics.

[0149] It is understandable that the image height of the 1.0 field of view refers to half of the diagonal length of the effective pixel area of the sensor; the image height of the MIC field of view refers to the field of view height that extends outward from the 1.0 field of view image height to prevent assembly deviation; the FOV in the diagonal direction of the 1.0 field of view refers to the field of view angle corresponding to the effective pixel area of the sensor; the FOV in the diagonal direction of the MIC field of view refers to the field of view angle corresponding to the MIC field of view image height.

[0150] (Second Embodiment)

[0151] The symbol meanings in the second embodiment are the same as those in the first embodiment.

[0152] Figure 5 Shown is the imaging optical lens 20 of the second embodiment of the present invention.

[0153] Tables 3 and 4 show the design data of the imaging optical lens 20 of the second embodiment of the present invention.

[0154]

Table 3

[0155]

[0156]

[0157] Table 4 shows the aspheric data of each lens in the imaging optical lens 20 of the second embodiment of the present invention.

[0158]

Table 4

[0159]

[0160]

[0161] Figure 6 、 Figure 7 Respectively show the axial aberration and chromatic aberration of magnification diagrams of light with wavelengths of 656nm, 588nm, 546nm, 486nm, and 436nm after passing through the imaging optical lens 20 of the second embodiment. Figure 8 Then shows the field curvature and distortion diagrams of light with a wavelength of 546nm after passing through the imaging optical lens 20 of the second embodiment. Figure 8 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0162] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 20 is 4.679 mm, the image height IH at a field of view of 1.0 is 7.899 mm, the image height at the MIC field of view is 8.100 mm, the FOV in the diagonal direction of the 1.0 field of view is 86.90°, and the FOV in the diagonal direction of the MIC field of view is 88.42°. The imaging optical lens 20 meets the design requirements of miniaturization, wide-angle, and sufficient correction of aberrations, and has excellent optical characteristics.

[0163] (Third Embodiment)

[0164] The symbolic meanings in the third embodiment are the same as those in the first embodiment.

[0165] Figure 9 Shown is the imaging optical lens 30 of the third embodiment of the present utility model.

[0166] Tables 5 and 6 show the design data of the imaging optical lens 30 of the third embodiment of the present utility model.

[0167]

Table 5

[0168]

[0169]

[0170] Table 6 shows the aspherical data of each lens in the imaging optical lens 30 of the third embodiment of the present utility model.

[0171]

Table 6

[0172]

[0173]

[0174] Figure 10 、 Figure 11 Respectively show the axial aberration and chromatic aberration of magnification diagrams of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 nm after passing through the imaging optical lens 30 of the third embodiment. Figure 12 Then shows the field curvature and distortion diagrams of light with a wavelength of 546 nm after passing through the imaging optical lens 30 of the third embodiment. Figure 12 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0175] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 30 is 4.885 mm, the image height IH at a 1.0 field of view is 7.915 mm, the image height at the MIC field of view is 8.100 mm, the FOV in the diagonal direction of the 1.0 field of view is 84.78°, and the FOV in the diagonal direction of the MIC field of view is 86.34°. The imaging optical lens 30 meets the design requirements of miniaturization, wide-angle, and sufficient correction of aberration, and has excellent optical characteristics.

[0176] (Fourth Embodiment)

[0177] The symbol meanings in the fourth embodiment are the same as those in the first embodiment.

[0178] Tables 7 and 8 show the design data of the imaging optical lens 40 in the fourth embodiment of the present utility model.

[0179]

Table 7

[0180]

[0181] Table 8 shows the aspherical data of each lens in the imaging optical lens 40 in the fourth embodiment of the present utility model.

[0182]

Table 8

[0183]

[0184]

[0185] Figure 14 、 Figure 15 respectively show the axial aberration and chromatic aberration of magnification diagrams of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 nm after passing through the imaging optical lens 40 in the fourth embodiment. Figure 16 shows the field curvature and distortion diagrams of light with a wavelength of 546 nm after passing through the imaging optical lens 40 in the fourth embodiment. Figure 16 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0186] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 40 is 4.868 mm, the image height IH at a 1.0 field of view is 8.000 mm, the image height at the MIC field of view is 8.290 mm, the FOV in the diagonal direction of the 1.0 field of view is 84.97°, and the FOV in the diagonal direction of the MIC field of view is 87.18°. The imaging optical lens 40 meets the design requirements of miniaturization, wide-angle, and sufficient correction of aberration, and has excellent optical characteristics.

[0187] Table 9 shown later shows the values corresponding to various numerical values and the parameters specified in the conditional expressions in Embodiments 1, 2, 3, and 4.

[0188] [Table 9]

[0189]

[0190] Those of ordinary skill in the art can understand that the above-described embodiments are specific embodiments for implementing the present utility model, and in actual applications, various changes can be made in form and details without departing from the spirit and scope of the present utility model.

Claims

1. An imaging optical lens, characterized in that, The imaging optical lens includes an aperture stop and seven lenses in total. The seven lenses are, in order from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power; The object side surface of the first lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the second lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the third lens is concave at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the fourth lens is convex at the paraxial region; the object side surface of the fifth lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; the object side surface of the sixth lens is convex at the paraxial region, and the image side surface is convex at the paraxial region; the object side surface of the seventh lens is convex at the paraxial region, and the image side surface is concave at the paraxial region; Wherein, the focal length of the imaging optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, the axial distance from the aperture stop to the object side surface of the first lens is d0, the axial thickness of the first lens is d1, the central curvature radius of the object side surface of the fifth lens at the paraxial region is R9, the central curvature radius of the image side surface of the fifth lens at the paraxial region is R10, the central curvature radius of the image side surface of the sixth lens at the paraxial region is R12, the central curvature radius of the object side surface of the seventh lens at the paraxial region is R13, the central curvature radius of the image side surface of the seventh lens at the paraxial region is R14, and the following relational expressions are satisfied: -18.000 ≤ f1 / f + f2 / f + f3 / f ≤ -8.000; -1.800 ≤ f4 / f + f5 / f + f6 / f + f7 / f ≤ -0.600; -0.080 ≤ d0 / d1 ≤ -0.050; -8.000 ≤ R12 / f6 ≤ -2.500; -1.000 ≤ f4 / f5 ≤ -0.500; 1.700 ≤ (R9 + R10) / f ≤ 2.600; 2.000 ≤ R13 / R14 ≤ 6.

000.

2. The imaging optical lens according to claim 1, wherein The following relational expression is satisfied: -15.000 ≤ f1 / f + f2 / f + f3 / f ≤ -9.

000.

3. The imaging optical lens according to claim 1, wherein, The following relational expression is satisfied: -1.500 ≤ f4 / f + f5 / f + f6 / f + f7 / f ≤ -0.

700.

4. The imaging optical lens according to claim 1, wherein The axial distance between the image side surface of the fourth lens and the object side surface of the fifth lens is d8, and the overall optical length of the imaging optical lens is TTL, and the following relational expression is satisfied: 0.065 ≤ d8 / TTL ≤ 0.

120.

5. The imaging optical lens according to claim 1, wherein The first lens is a glass lens.

6. An imaging optical lens, characterized in that, The imaging optical lens includes an aperture stop and seven lenses in total. The seven lenses are, in order from the object side to the image side: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with negative refractive power; The object side surface of the first lens is convex near the axis, and the image side surface is concave near the axis; the object side surface of the second lens is convex near the axis, and the image side surface is concave near the axis; the object side surface of the third lens is concave near the axis, and the image side surface is concave near the axis; the object side surface of the fourth lens is convex near the axis; the object side surface of the fifth lens is convex near the axis, and the image side surface is concave near the axis; the object side surface of the sixth lens is convex near the axis, and the image side surface is convex near the axis; the object side surface of the seventh lens is convex near the axis, and the image side surface is concave near the axis; Among them, the focal length of the imaging optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, the axial distance from the aperture stop to the object side surface of the first lens is d0, the axial thickness of the first lens is d1, the central curvature radius of the object side surface of the first lens near the axis is R1, the central curvature radius of the image side surface of the first lens near the axis is R2, the central curvature radius of the object side surface of the seventh lens near the axis is R13, the central curvature radius of the image side surface of the seventh lens near the axis is R14, the sum of the axial thicknesses of each lens from the first lens to the seventh lens is ∑d, the sum of the lengths of the air gaps on the optical axis between any two adjacent lenses from the first lens to the seventh lens is ∑D, and the following relationships are satisfied: -18.000 ≤ f1 / f + f2 / f + f3 / f ≤ -8.000; -1.800 ≤ f4 / f + f5 / f + f6 / f + f7 / f ≤ -0.600; -0.080 ≤ d0 / d1 ≤ -0.050; 2.600 ≤ f1 / R1 + f1 / R2 ≤ 4.800; 0.600 ≤ (R13 + R14) / f ≤ 2.600; 0.600 ≤ ∑D / ∑d ≤ 0.

950.

7. The imaging optical lens according to claim 6, wherein, The following relationship is satisfied: -15.000 ≤ f1 / f + f2 / f + f3 / f ≤ -9.

000.

8. The imaging optical lens according to claim 6, wherein The following relationship is satisfied: -1.500 ≤ f4 / f + f5 / f + f6 / f + f7 / f ≤ -0.

700.

9. The imaging optical lens according to claim 6, wherein The following relationship is satisfied: 3.400 ≤ f1 / R1 + f1 / R2 ≤ 4.

000.

10. The imaging optical lens according to claim 6, characterized in that, The following relationship is satisfied: 0.700 ≤ (R13 + R14) / f ≤ 2.

200.

11. The imaging optical lens according to claim 6, wherein The following relationship is satisfied: 0.630 ≤ ∑D / ∑d ≤ 0.

920.

12. The imaging optical lens according to claim 6, wherein The combined focal length of the first lens and the second lens is f12, and the central radius of curvature of the image side of the second lens at the paraxial region is R4, and the following relational expression is satisfied: -3.000 ≤ f12 / (R1 - R4) ≤ -1.

300.

13. The imaging optical lens according to claim 12, wherein The following relational expression is satisfied: -2.600 ≤ f12 / (R1 - R4) ≤ -1.

500.

14. The imaging optical lens according to claim 6, wherein The following relational expression is satisfied: 0.007 ≤ d0 / (R1 - R2) ≤ 0.

020.

15. The imaging optical lens according to claim 14, wherein The following relational expression is satisfied: 0.008 ≤ d0 / (R1 - R2) ≤ 0.

018.

16. The imaging optical lens according to claim 6, wherein The first lens is a glass lens.

Images