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. The following relational expression is satisfied: d11.5 / d131.5 is greater than or equal to 0.90 and less than or equal to 1.70; (d31.5 + d51.5 + d71.5) / (d91.5 + d111.5) is greater than or equal to 1.00 and less than or equal to 1.80; and 1.10 < = d131.5 / d13 < = 2.00.

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 better-functioning, thin, light, and portable appearance, therefore, miniaturized imaging optical lenses with good imaging quality have 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 increase in diverse user requirements, 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 emerged in lens design. There is an urgent need for an imaging lens with strong processability and ultra-thinness. Summary of the Utility Model

[0003] Aiming at the above problems, the purpose of the utility model is to provide an imaging optical lens, which meets the design requirements of strong processability and ultra-thinness.

[0004] To achieve the above purpose, the technical solution of the utility model provides an imaging optical lens, which comprises a total of seven lenses. 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, and the image side surface 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;

[0005] Among them, the on-axis distance from the image side of the seventh lens to the image plane is BF, the total optical length of the imaging optical lens is TTL, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, the central curvature radius of the object side of the sixth lens at the paraxial region is R11, the central curvature radius of the object side of the seventh lens at the paraxial region is R13, the on-axis thickness of the first lens is d1, the on-axis distance between the first lens and the second lens is d2, the on-axis thickness of the second lens is d3, the on-axis thickness of the seventh lens is d13, and the thickness of the first lens in the direction parallel to the optical axis at a radius of 1.5 mm is d1 1.5 , the thickness of the second lens in the direction parallel to the optical axis at a radius of 1.5 mm is d3 1.5 , the thickness of the third lens in the direction parallel to the optical axis at a radius of 1.5 mm is d5 1.5 , the thickness of the fourth lens in the direction parallel to the optical axis at a radius of 1.5 mm is d7 1.5 , the thickness of the fifth lens in the direction parallel to the optical axis at a radius of 1.5 mm is d9 1.5 , the thickness of the sixth lens in the direction parallel to the optical axis at a radius of 1.5 mm is d11 1.5 , the thickness of the seventh lens in the direction parallel to the optical axis at a radius of 1.5 mm is d13 1.5 , and the following relational expressions are satisfied:

[0006] 0.16 ≤ BF / TTL ≤ 0.25;

[0007] 2.10 ≤ f6 / R11 - f7 / R13 ≤ 2.90;

[0008] 3.50 ≤ (d1 + d3) / d2 ≤ 9.00;

[0009] 0.90 ≤ d1 1.5 / d13 1.5 ≤ 1.70;

[0010] 1.00 ≤ (d3 1.5 + d5 1.5 + d7 1.5 ) / (d9 1.5 + d11 1.5 ) ≤ 1.80;

[0011] 1.10 ≤ d13 1.5 / d13 ≤ 2.00.

[0012] Preferably, the following relational expression is satisfied: 1.00 ≤ d1 1.5 / d13 1.5 ≤ 1.50.

[0013] Preferably, the following relationship is satisfied: 1.20 ≤ (d3 1.5 + d5 1.5 + d7 1.5 ) / (d9 1.5 + d11 1.5 ) ≤ 1.55.

[0014] Preferably, the following relationship is satisfied: 1.25 ≤ d13 1.5 / d13 ≤ 1.80.

[0015] Preferably, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the on-axis thickness of the third lens is d5, and the on-axis thickness of the fourth lens is d7. The following relationship is satisfied: -120.00 ≤ f3 / d5 + f4 / d7 ≤ -50.00.

[0016] Preferably, the central curvature radius of the object side surface of the fifth lens at the paraxial region is R9, and the central curvature radius of the image side surface of the fifth lens at the paraxial region is R10. The following relationship is satisfied: 3.10 ≤ (R9 + R10) / (R9 - R10) ≤ 8.50.

[0017] Preferably, the following relationship is satisfied: -105.00 ≤ f3 / d5 + f4 / d7 ≤ -60.00.

[0018] Preferably, the following relationship is satisfied: 3.80 ≤ (R9 + R10) / (R9 - R10) ≤ 7.00.

[0019] Preferably, the first lens is a glass lens.

[0020] The present invention also provides a camera optical lens. The camera optical lens includes 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 and the image side surface 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;

[0021] Among them, the focal length of the imaging optical lens is f, the combined focal length of the first lens and the second lens is f12, the on-axis thickness of the first lens is d1, the on-axis thickness of the second lens is d3, the on-axis thickness of the seventh lens is d13, and the thickness of the first lens in the direction parallel to the optical axis at a radius of 1.5 mm is d1 1.5 , the thickness of the second lens in the direction parallel to the optical axis at a radius of 1.5 mm is d3 1.5 , the thickness of the third lens in the direction parallel to the optical axis at a radius of 1.5 mm is d5 1.5 , the thickness of the fourth lens in the direction parallel to the optical axis at a radius of 1.5 mm is d7 1.5 , the thickness of the fifth lens in the direction parallel to the optical axis at a radius of 1.5 mm is d9 1.5 , the thickness of the sixth lens in the direction parallel to the optical axis at a radius of 1.5 mm is d11 1.5 , the thickness of the seventh lens in the direction parallel to the optical axis at a radius of 1.5 mm is d13 1.5 , the sum of the on-axis thicknesses of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens is Σd, the overall optical length of the imaging optical lens is TTL, and the following relational expressions are satisfied:

[0022] 0.90 ≤ d1 1.5 / d13 1.5 ≤ 1.70;

[0023] 1.00 ≤ (d3 1.5 + d5 1.5 + d7 1.5 ) / (d9 1.5 + d11 1.5 ) ≤ 1.80;

[0024] 1.10 ≤ d13 1.5 / d13 ≤ 2.00;

[0025] 0.30 ≤ Σd / TTL ≤ 0.65;

[0026] 1.20 ≤ (d1 + d3 + d13) / d1 ≤ 2.30;

[0027] 0.90 ≤ f12 / f ≤ 1.60.

[0028] Preferably, the following relational expression is satisfied: 0.38 ≤ Σd / TTL ≤ 0.58.

[0029] Preferably, the following relational expression is satisfied: 1.50 ≤ (d1 + d3 + d13) / d1 ≤ 2.00.

[0030] Preferably, the following relationship is satisfied: 1.10 ≤ f12 / f ≤ 1.40.

[0031] Preferably, the following relationship is satisfied: 1.00 ≤ d1 1.5 / d13 1.5 ≤ 1.50.

[0032] Preferably, the following relationship is satisfied: 1.20 ≤ (d3 1.5 +d5 1.5 +d7 1.5 ) / (d9 1.5 +d11 1.5 ) ≤ 1.55.

[0033] Preferably, the following relationship is satisfied: 1.25 ≤ d13 1.5 / d13 ≤ 1.80.

[0034] Preferably, the central curvature radius of the object side surface of the first lens at the paraxial region is R1, and the central curvature radius of the image side surface of the first lens at the paraxial region is R2. The following relationship is satisfied: -2.50 ≤ (R1 + R2) / (R1 - R2) ≤ -1.60.

[0035] Preferably, the on-axis thickness of the fourth lens is d7, the on-axis distance between the fourth lens and the fifth lens is d8, and the on-axis thickness of the fifth lens is d9. The following relationship is satisfied: 1.10 ≤ (d7 + d9) / d8 ≤ 2.10.

[0036] Preferably, the following relationship is satisfied: -2.20 ≤ (R1 + R2) / (R1 - R2) ≤ -1.90.

[0037] Preferably, the following relationship is satisfied: 1.40 ≤ (d7 + d9) / d8 ≤ 1.75.

[0038] Preferably, the first lens is a glass lens.

[0039] The beneficial effects of the present utility model are as follows: The imaging optical lens according to the present utility model has excellent optical characteristics, and has characteristics of strong processability and ultra-thinning, and is particularly suitable for mobile phone imaging lens assemblies, WEB imaging lenses, and vehicle-mounted lenses composed of imaging elements such as high-pixel CCDs and CMOSs. Description of the Drawings

[0040] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0041] Figure 1 is a schematic structural diagram of the imaging optical lens according to the first embodiment of the present utility model;

[0042] Figure 2 is Figure 1 a schematic diagram of the axial aberration of the imaging optical lens shown;

[0043] Figure 3 is Figure 1 a schematic diagram of the longitudinal chromatic aberration of the imaging optical lens shown;

[0044] Figure 4 is Figure 1 a schematic diagram of the field curvature and distortion of the imaging optical lens shown;

[0045] Figure 5 is a schematic structural diagram of the imaging optical lens according to the second embodiment of the present utility model;

[0046] Figure 6 is Figure 5 a schematic diagram of the axial aberration of the imaging optical lens shown;

[0047] Figure 7 is Figure 5 a schematic diagram of the longitudinal chromatic aberration of the imaging optical lens shown;

[0048] Figure 8 is Figure 5 a schematic diagram of the field curvature and distortion of the imaging optical lens shown;

[0049] Figure 9 is a schematic structural diagram of the imaging optical lens according to the third embodiment of the present utility model;

[0050] Figure 10 is Figure 9 a schematic diagram of the axial aberration of the imaging optical lens shown;

[0051] Figure 11 is Figure 9 a schematic diagram of the longitudinal chromatic aberration of the imaging optical lens shown;

[0052] Figure 12 is Figure 9 a schematic diagram of the field curvature and distortion of the imaging optical lens shown;

[0053] Figure 13It is a schematic structural diagram of the camera optical lens according to the fourth embodiment of the present invention;

[0054] Figure 14 It is Figure 13 a schematic diagram of the axial aberration of the shown camera optical lens;

[0055] Figure 15 It is Figure 13 a schematic diagram of the longitudinal chromatic aberration of the shown camera optical lens;

[0056] Figure 16 It is Figure 13 a schematic diagram of the field curvature and distortion of the shown camera optical lens; Detailed Embodiments

[0057] To make the objectives, technical solutions and advantages of the present invention clearer, the following will elaborate on each embodiment of the present invention with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the present invention, many technical details are provided to help readers better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed by the present invention can still be implemented.

[0058] Referring to the attached Figure 1-16 drawings, the technical solution of the present invention provides a camera optical lens 10, 20, 30, 40. Figure 1 , 5 As shown in FIGS. 9 and 13, the camera optical lenses 10, 20, 30, 40 of the present invention include a total of seven lenses. Specifically, the camera optical lens, from the object side to the image side in sequence, is: aperture S1, first lens L1, second lens L2, third lens L3, 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.

[0059] The first lens L1 is made of glass, the second lens L2 is made of plastic, the third lens L3 is made of plastic, the fourth lens L4 is made of plastic, the fifth lens L5 is made of plastic, the sixth lens L6 is made of plastic, and the seventh lens L7 is made of plastic. By using a combination of glass and resin lenses, it plays a role in reducing chromatic aberration and improving the performance of the optical camera lens. Each lens can also be made of other materials.

[0060] The first lens has a positive refractive power, with its object side convex near the axis and its image side concave near the axis; the second lens has a negative refractive power, with its object side convex near the axis and its image side concave near the axis; the third lens has a negative refractive power, with its object side concave near the axis and its image side concave near the axis; the fourth lens has a positive refractive power, with its object side convex near the axis and its image side convex near the axis; the fifth lens has a negative refractive power, with its object side convex near the axis and its image side concave near the axis; the sixth lens has a positive refractive power, with its object side convex near the axis and its image side convex near the axis; the seventh lens has a negative refractive power, with its object side convex near the axis and its image side concave near the axis. The object side and the image side of each lens can also be set to other concave and convex distribution cases.

[0061] The object sides and the image sides 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 all aspherical surfaces.

[0062] Define the on-axis distance from the image side of the seventh lens to the image plane as BF, and the overall optical length of the imaging optical lens as TTL. The following relationship is satisfied: 0.16 ≤ BF / TTL ≤ 0.25. By reasonably configuring the ratio of the back focal length of the optical system, while shortening the overall length of the optical system to achieve a miniaturized design, it is also beneficial to reasonably control the incident angle of the chief ray from the outermost field of view to the imaging plane, avoiding excessive incident angle of the chief ray in the outermost field of view resulting in a decrease in relative illumination, thereby being beneficial to improving the imaging quality of the optical system.

[0063] Define the focal length of the sixth lens as f6, the focal length of the seventh lens as f7, the central curvature radius of the object side of the sixth lens near the axis as R11, and the central curvature radius of the object side of the seventh lens near the axis as R13. The following relationship is satisfied: 2.10 ≤ f6 / R11 - f7 / R13 ≤ 2.90. By reasonably controlling the relationship between the focal lengths of the sixth lens and the seventh lens and the near-axis curvature radius of the object side, it is beneficial to reasonably design the incident angle of light on the object sides of the sixth lens and the seventh lens, and is beneficial to achieving ultrathinness.

[0064] Define the on-axis thickness of the first lens as d1, the on-axis distance between the first lens and the second lens as d2, and the on-axis thickness of the second lens as d3. The following relationship is satisfied: 3.50 ≤ (d1 + d3) / d2 ≤ 9.00. Within this range, while having good optical characteristics, it is easy to achieve a wide angle and ultrathinness.

[0065] Define the thickness of the first lens in the direction parallel to the optical axis at a radius of 1.5 mm as d1 1.5 , and the thickness of the seventh lens in the direction parallel to the optical axis at a radius of 1.5 mm as d13 1.5 , and the following relationship is satisfied: 0.90 ≤ d11.5 / d13 1.5 ≤1.70. By reasonably controlling the ratio of the thicknesses of the first lens and the seventh lens in the direction parallel to the optical axis at a radius of 1.5 mm, it is beneficial to improve the processability of the lens, and at the same time, it is beneficial to achieve ultra-thinness. Preferably, 1.00 ≤ d1 1.5 / d13 1.5 ≤1.50.

[0066] Define the thickness of the second lens in the direction parallel to the optical axis at a radius of 1.5 mm as d3 1.5 , and the thickness of the third lens in the direction parallel to the optical axis at a radius of 1.5 mm as d5 1.5 , and the thickness of the fourth lens in the direction parallel to the optical axis at a radius of 1.5 mm as d7 1.5 , and the thickness of the fifth lens in the direction parallel to the optical axis at a radius of 1.5 mm as d9 1.5 , and the thickness of the sixth lens in the direction parallel to the optical axis at a radius of 1.5 mm as d11 1.5 , satisfying the following relational expression: 1.00 ≤ (d3 1.5 +d5 1.5 +d7 1.5 ) / (d9 1.5 +d11 1.5 ) ≤ 1.80. By reasonably controlling the relationship of the thicknesses of the second to sixth lenses in the direction parallel to the optical axis at a radius of 1.5 mm, it is beneficial to correct aberrations and at the same time beneficial to shorten the overall optical length. Preferably, 1.20 ≤ (d3 1.5 +d5 1.5 +d7 1.5 ) / (d9 1.5 +d11 1.5 ) ≤ 1.55.

[0067] Define the on-axis thickness of the seventh lens as d13, and the thickness of the seventh lens in the direction parallel to the optical axis at a radius of 1.5 mm as d13 1.5 , satisfying the following relational expression: 1.10 ≤ d13 1.5 / d13 ≤ 2.00. By reasonably controlling the ratio of the thickness of the seventh lens in the direction parallel to the optical axis at a radius of 1.5 mm to the central thickness, it is beneficial to improve the processability of the lens and improve the production yield. Preferably, 1.25 ≤ d13 1.5 / d13 ≤ 1.80.

[0068] Define the focal length of the third lens as f3, the focal length of the fourth lens as f4, the on-axis thickness of the third lens as d5, and the on-axis thickness of the fourth lens as d7. The following relationship is satisfied: -120.00 ≤ f3 / d5 + f4 / d7 ≤ -50.00. By reasonably controlling the ratio of the on-axis thickness and focal length of the third lens and the fourth lens, it is beneficial to achieve wide-angle while improving the processing yield of the third lens and the fourth lens. Preferably, -105.00 ≤ f3 / d5 + f4 / d7 ≤ -60.00.

[0069] Define the central curvature radius of the object side of the fifth lens at the paraxial region as R9, and the central curvature radius of the image side of the fifth lens at the paraxial region as R10. The following relationship is satisfied: 3.10 ≤ (R9 + R10) / (R9 - R10) ≤ 8.50. Within this range, the surface shape of the fifth lens can be adjusted to control the light traveling direction, which helps to balance the viewing angle, volume, and imaging surface size. Preferably, 3.80 ≤ (R9 + R10) / (R9 - R10) ≤ 7.00.

[0070] Define the sum of the on-axis thicknesses of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens as Σd, and the optical total length of the imaging optical lens as TTL. The following relationship is satisfied: 0.30 ≤ Σd / TTL ≤ 0.65. By reasonably controlling the ratio of the sum of the on-axis thicknesses of each lens to the optical total length, ultra-thinness can be achieved. Preferably, 0.38 ≤ Σd / TTL ≤ 0.58.

[0071] Define the on-axis thickness of the first lens as d1, the on-axis thickness of the second lens as d3, and the on-axis thickness of the seventh lens as d13. The following relationship is satisfied: 1.20 ≤ (d1 + d3 + d13) / d1 ≤ 2.30. By reasonably controlling the central thicknesses of the first lens, the second lens, and the seventh lens, it is beneficial to shorten the optical total length. Preferably, 1.50 ≤ (d1 + d3 + d13) / d1 ≤ 2.00.

[0072] Define the focal length of the imaging optical lens as f, and the combined focal length of the first lens and the second lens as f12. The following relationship is satisfied: 0.90 ≤ f12 / f ≤ 1.60. By reasonably configuring the focal lengths of the first lens L1 and the second lens L2, chromatic aberration can be eliminated, spherical aberration can be reduced, and astigmatism can be corrected simultaneously, improving the resolution. Preferably, 1.10 ≤ f12 / f ≤ 1.40.

[0073] Define the central radius of curvature of the object side of the first lens at the paraxial region as R1, and the central radius of curvature of the image side of the first lens at the paraxial region as R2. The following relationship is satisfied: -2.50 ≤ (R1 + R2) / (R1 - R2) ≤ -1.60. By reasonably controlling the shape of the first lens, the surface shape and refractive power of the first lens can be adjusted, which helps to receive light with a larger viewing angle. Preferably, -2.20 ≤ (R1 + R2) / (R1 - R2) ≤ -1.90.

[0074] Define the on-axis thickness of the fourth lens as d7, the on-axis distance between the fourth lens and the fifth lens as d8, and the on-axis thickness of the fifth lens as d9. The following relationship is satisfied: 1.10 ≤ (d7 + d9) / d8 ≤ 2.10. By reasonably controlling the thickness and spacing of the fourth lens and the fifth lens, it is beneficial to reduce the assembly sensitivity of the fourth and fifth lenses and improve the assembly yield. Preferably, 1.40 ≤ (d7 + d9) / d8 ≤ 1.75.

[0075] Compared with the prior art, the imaging optical lens provided by the present utility model is configured with 0.16 ≤ BF / TTL ≤ 0.25; 2.10 ≤ f6 / R11 - f7 / R13 ≤ 2.90; 3.50 ≤ (d1 + d3) / d2 ≤ 9.00; 0.90 ≤ d1 1.5 / d13 1.5 ≤ 1.70; 1.00 ≤ (d3 1.5 + d5 1.5 + d7 1.5 ) / (d9 1.5 + d11 1.5 ) ≤ 1.80; 1.10 ≤ d13 1.5 / d13 ≤ 2.00. This can avoid the excessive incident angle of the chief ray in the outermost field of view, resulting in a decrease in relative illumination while shortening the total length of the optical system, thereby being beneficial to improving the imaging quality of the optical system. And by reasonably designing the incident angle of light on the object sides of the sixth lens and the seventh lens, it is beneficial to achieve ultra-thinness. It has good optical characteristics while meeting the requirements of wide angle and ultra-thinness. In addition, by reasonably controlling the thickness of each lens in the direction parallel to the optical axis at a radius of 1.5 mm, it is beneficial to improve the processability of the lens, improve the production yield, and at the same time be beneficial to achieving ultra-thinness.

[0076] Compared with the prior art, the imaging optical lens provided by the present utility model is configured with 0.90 ≤ d1 1.5 / d13 1.5 ≤ 1.70; 1.00 ≤ (d3 1.5 + d5 1.5 + d7 1.5 ) / (d9 1.5 + d11 1.5 ) ≤ 1.80; 1.10 ≤ d131.5 When - d13≤2.00; 0.30≤Σd / TTL≤0.65; 1.20≤(d1 + d3 + d13) / d1≤2.30; 0.90≤f12 / f≤1.60, chromatic aberration can be eliminated, spherical aberration can be reduced, astigmatism can be corrected, and resolution can be improved while meeting the requirement of ultra - thinning. In addition, reasonably controlling the thickness of each lens in the direction parallel to the optical axis at a radius of 1.5 mm is beneficial to improving the processability of the lens, increasing the production yield, and facilitating ultra - thinning.

[0077] The following will illustrate the imaging optical lens of the present utility model with examples. The symbols described in each example are as follows. The units of focal length, axial distance, central radius of curvature, and axial thickness are mm.

[0078] TTL: The total optical length of the imaging optical lens (the axial distance from the object side of the first lens L1 to the image plane Si), with the unit of mm;

[0079] Aperture value FNO: It refers to the ratio of the effective focal length of the imaging optical lens to the entrance pupil diameter.

[0080] Next, the technical solutions of the present utility model will be specifically described with four embodiments. When exceeding the scope of the above - mentioned conditional formula, the technical effects of the present utility model cannot be achieved.

[0081] (The first embodiment)

[0082] Tables 1 and 2 show the design data of the imaging optical lens 10 of the first embodiment of the present utility model.

[0083]

Table 1

[0084]

[0085]

[0086] Among them, the meanings of each symbol are as follows.

[0087] S1: Aperture;

[0088] R: The radius of curvature at the center of the optical surface;

[0089] R1: The central radius of curvature of the object side of the first lens L1 at paraxial region; R2: The central radius of curvature of the image side of the first lens L1 at paraxial region; R3: The central radius of curvature of the object side of the second lens L2 at paraxial region; R4: The central radius of curvature of the image side of the second lens L2 at paraxial region; R5: The central radius of curvature of the object side of the third lens L3 at paraxial region; R6: The central radius of curvature of the image side of the third lens L3 at paraxial region; R7: The central radius of curvature of the object side of the fourth lens L4 at paraxial region; R8: The central radius of curvature of the image side of the fourth lens L4 at paraxial region; R9: The central radius of curvature of the object side of the fifth lens L5 at paraxial region; R10: The central radius of curvature of the image side of the fifth lens L5 at paraxial region; R11: The central radius of curvature of the object side of the sixth lens L6 at paraxial region; R12: The central radius of curvature of the image side of the sixth lens L6 at paraxial region; R13: The central radius of curvature of the object side of the seventh lens L7 at paraxial region; R14: The central radius of curvature of the image side of the seventh lens L7 at paraxial region; R15: The central radius of curvature of the object side of the optical filter GF;

[0090] R16: The central radius of curvature of the image side of the optical filter GF;

[0091] d: The on-axis thickness of the lens, the on-axis distance between lenses;

[0092] d0: The on-axis distance from the aperture S1 to the object side of the first lens L1;

[0093] d1: The on-axis thickness of the first lens L1;

[0094] d2: The on-axis distance from the image side of the first lens L1 to the object side of the second lens L2;

[0095] d3: The on-axis thickness of the second lens L2;

[0096] d4: The on-axis distance from the image side of the second lens L2 to the object side of the third lens L3;

[0097] d5: The on-axis thickness of the third lens L3;

[0098] d6: The on-axis distance from the image side of the third lens L3 to the object side of the fourth lens L4;

[0099] d7: The on-axis thickness of the fourth lens L4;

[0100] d8: The on-axis distance from the image side of the fourth lens L4 to the object side of the fifth lens L5;

[0101] d9: The on-axis thickness of the fifth lens L5;

[0102] d10: The on-axis distance from the image side of the fifth lens L5 to the object side of the sixth lens L6;

[0103] d11: The on-axis thickness of the sixth lens L6;

[0104] d12: The on-axis distance from the image side of the sixth lens L6 to the object side of the seventh lens L7;

[0105] d13: The on-axis thickness of the seventh lens L7;

[0106] d14: The on-axis distance from the image side of the seventh lens L7 to the object side of the optical filter GF;

[0107] d15: The on-axis thickness of the optical filter GF;

[0108] d16: The on-axis distance from the image side of the optical filter GF to the image plane Si;

[0109] nd: The refractive index of the d-line (the d-line is green light with a wavelength of 550 nm);

[0110] nd1: The refractive index of the d-line of the first lens L1;

[0111] nd2: The refractive index of the d-line of the second lens L2;

[0112] nd3: The refractive index of the d-line of the third lens L3;

[0113] nd4: The refractive index of the d-line of the fourth lens L4;

[0114] nd5: The refractive index of the d-line of the fifth lens L5;

[0115] nd6: The refractive index of the d-line of the sixth lens L6;

[0116] nd7: The refractive index of the d-line of the seventh lens L7;

[0117] ndg: The refractive index of the d-line of the optical filter GF;

[0118] vd: Abbe number;

[0119] v1: The Abbe number of the first lens L1;

[0120] v2: The Abbe number of the second lens L2;

[0121] v3: The Abbe number of the third lens L3;

[0122] v4: The Abbe number of the fourth lens L4;

[0123] v5: The Abbe number of the fifth lens L5;

[0124] v6: The Abbe number of the sixth lens L6;

[0125] v7: Abbe number of the seventh lens L7;

[0126] vg: Abbe number of the optical filter GF.

[0127] Table 2 shows the aspherical data of each lens in the imaging optical lens 10 of the first embodiment of the present invention.

[0128]

Table 2

[0129]

[0130]

[0131] 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).

[0132] z = (cr 2 ) / {1 + [1 - (k + 1)(c 2 r 2 )] 1 / 2} + A4r 4 + A6r 6 + A8r 8 + A10r 10 + A12r 12 + A14r

[0133] 14 + A16r 16 + A18r 18 + A20r 20 + A22r 22 + A24r 24 + A26r 26 + A28r 28 + A30r 30 (1)

[0134] Where k is the conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 are aspherical coefficients, c is the curvature at the center of the optical surface, r is the perpendicular distance from the point on the aspherical curve to the optical axis, and z is the aspherical depth (the perpendicular distance between the point on the aspherical surface at a distance r from the optical axis and the tangent plane at the vertex of the aspherical surface on the optical axis).

[0135] Figure 2 、 Figure 3 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 10 of the first embodiment. Figure 4It shows a schematic diagram of the field curvature and distortion 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.

[0136] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 10 is 4.901 mm, the image height IH of the full field of view (1.0 field of view) is 8.000 mm, the image height IH of the MIC field of view is 8.290 mm, the field of view angle FOV in the diagonal direction of the full field of view (1.0 field of view) is 84.13°; the field of view angle FOV in the diagonal direction of the MIC field of view is 86.10°. The imaging optical lens 10 meets the design requirements of strong processability and ultra-thinness. Its axial and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0137] It can be understood 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 expanded outside the image height of the 1.0 field of view 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 image height of the MIC field of view.

[0138] (Second Embodiment)

[0139] The symbolic meanings in the second embodiment are the same as those in the first embodiment.

[0140] Figure 5 Shown is the imaging optical lens 20 of the second embodiment of the present invention.

[0141] Table 3 and Table 4 show the design data of the imaging optical lens 20 of the second embodiment of the present invention.

[0142]

Table 3

[0143]

[0144] Table 4 shows the aspheric data of each lens in the imaging optical lens 20 of the second embodiment of the present invention.

[0145]

Table 4

[0146]

[0147]

[0148] Figure 6 、 Figure 7Schematic diagrams of axial aberration and lateral chromatic aberration of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 nm after passing through the imaging optical lens 20 of the second embodiment are respectively shown. Figure 8 Schematic diagrams of field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 20 of the second embodiment are shown. Figure 8 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0149] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 20 is 4.868 mm, the image height IH of the full field of view (1.0 field of view) is 8.000 mm, the image height IH of the MIC field of view is 8.290 mm, the field of view angle FOV in the diagonal direction of the full field of view (1.0 field of view) is 84.97°, the field of view angle FOV in the diagonal direction of the MIC field of view is 87.18°. The imaging optical lens 20 meets the design requirements of strong processability and ultra-thinness, and its on-axis and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0150] (Third Embodiment)

[0151] The symbolic meanings in the third embodiment are the same as those in the first embodiment.

[0152] Figure 9 The imaging optical lens 30 of the third embodiment of the present invention is shown.

[0153] Tables 5 and 6 show the design data of the imaging optical lens 30 of the third embodiment of the present invention.

[0154]

Table 5

[0155]

[0156] Table 6 shows the aspherical data of each lens in the imaging optical lens 30 of the third embodiment of the present invention.

[0157]

Table 6

[0158]

[0159]

[0160] Figure 10 、 Figure 11 Schematic diagrams of axial aberration and lateral chromatic aberration of light with wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, and 436 nm after passing through the imaging optical lens 30 of the third embodiment are respectively shown. Figure 12 Schematic diagrams of field curvature and distortion of light with a wavelength of 546 nm after passing through the imaging optical lens 30 of the third embodiment are shown.Figure 12 The field curvature S is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction.

[0161] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 30 is 4.882 mm, the image height IH of the full field of view (1.0 field of view) is 8.000 mm, the image height IH of the MIC field of view is 8.290 mm, the field of view angle FOV in the diagonal direction of the full field of view (1.0 field of view) is 84.20°, the field of view angle FOV in the diagonal direction of the MIC field of view is 86.07°. The imaging optical lens 30 meets the design requirements of strong processability and ultra-thinness, and its axial and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0162] (Fourth Embodiment)

[0163] The symbol meanings in the fourth embodiment are the same as those in the first embodiment.

[0164] Figure 13 Shown is the imaging optical lens 40 of the fourth embodiment of the present invention.

[0165] Tables 7 and 8 show the design data of the imaging optical lens 40 of the fourth embodiment of the present invention.

[0166]

Table 7

[0167]

[0168]

[0169] Table 8 shows the aspherical data of each lens in the imaging optical lens 40 of the fourth embodiment of the present invention.

[0170]

Table 8

[0171]

[0172]

[0173] Figure 14 、 Figure 15 Respectively show the axial aberration and magnification chromatic aberration schematic 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 of the fourth embodiment. Figure 16 Then shows the field curvature and distortion schematic diagrams of light with a wavelength of 546 nm after passing through the imaging optical lens 40 of 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.

[0174] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 40 is 4.923 mm, the image height IH of the full field of view (1.0 field of view) is 8.000 mm, the image height IH of the MIC field of view is 8.200 mm, the field of view FOV in the diagonal direction of the full field of view (1.0 field of view) is 83.52°, and the field of view FOV in the diagonal direction of the MIC field of view is 84.97°. The imaging optical lens 40 meets the design requirements of strong processability and ultra-thinness, its axial and off-axis chromatic aberrations are fully corrected, and it has excellent optical characteristics.

[0175] Table 9 shown later shows the values corresponding to various numerical values and parameters specified in the conditional expressions in Embodiments 1, 2, 3, and 4.

[0176]

Table 9

[0177]

[0178]

[0179] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present invention, and in practical applications, various changes can be made in form and details without departing from the spirit and scope of the present invention.

Claims

1. An imaging optical lens, characterized in that, The imaging optical lens comprises a total of seven lenses. 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 and the image side surface 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; Among them, the on-axis distance from the image side of the seventh lens to the image plane is BF, the overall optical length of the imaging optical lens is TTL, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, the central curvature radius of the object side of the sixth lens at the paraxial region is R11, the central curvature radius of the object side of the seventh lens at the paraxial region is R13, the on-axis thickness of the first lens is d1, the on-axis distance between the first lens and the second lens is d2, the on-axis thickness of the second lens is d3, the on-axis thickness of the seventh lens is d13, the thickness of the first lens in the direction parallel to the optical axis at a radius of 1.5 mm is d1 1.5 , the thickness of the second lens in the direction parallel to the optical axis at a radius of 1.5 mm is d3 1.5 , the thickness of the third lens in the direction parallel to the optical axis at a radius of 1.5 mm is d5 1.5 , the thickness of the fourth lens in the direction parallel to the optical axis at a radius of 1.5 mm is d7 1.5 , the thickness of the fifth lens in the direction parallel to the optical axis at a radius of 1.5 mm is d9 1.5 , the thickness of the sixth lens in the direction parallel to the optical axis at a radius of 1.5 mm is d11 1.5 , the thickness of the seventh lens in the direction parallel to the optical axis at a radius of 1.5 mm is d13 1.5 , and the following relational expressions are satisfied: 0.16 ≤ BF / TTL ≤ 0.25; 2.10 ≤ f6 / R11 - f7 / R13 ≤ 2.90; 3.50 ≤ (d1 + d3) / d2 ≤ 9.00; 0.90 ≤ d1 1.5 / d13 1.5 ≤ 1.70; 1.00≤(d3 1.5 +d5 1.5 +d7 1.5 ) / (d9 1.5 +d11 1.5 )≤1.80; 1.10 ≤ d13 1.5 / d13 ≤ 2.

00.

2. The imaging optical lens according to claim 1, wherein Satisfy the following relationship: 1.00 ≤ d1 1.5 / d13 1.5 ≤ 1.

50.

3. The imaging optical lens according to claim 1, characterized in that, Satisfy the following relational expression: 1.20 ≤ (d3 1.5 + d5 1.5 + d7 1.5 ) / (d9 1.5 + d11 1.5 ) ≤ 1.

55.

4. The imaging optical lens according to claim 1, wherein Satisfy the following relationship: 1.25 ≤ d13 1.5 / d13 ≤ 1.

80.

5. The imaging optical lens according to claim 1, characterized in that, The focal length of the third lens is f3, the focal length of the fourth lens is f4, the on-axis thickness of the third lens is d5, and the on-axis thickness of the fourth lens is d7, satisfying the following relationship: -120.00 ≤ f3 / d5 + f4 / d7 ≤ -50.

00.

6. The imaging optical lens according to claim 1, wherein, The central curvature radius of the object side surface of the fifth lens at the paraxial region is R9, and the central curvature radius of the image side surface of the fifth lens at the paraxial region is R10, satisfying the following relationship: 3.10 ≤ (R9 + R10) / (R9 - R10) ≤ 8.

50.

7. The imaging optical lens according to claim 5, wherein Satisfying the following relationship: -105.00 ≤ f3 / d5 + f4 / d7 ≤ -60.

00.

8. The imaging optical lens according to claim 6, characterized in that, Satisfying the following relationship: 3.80 ≤ (R9 + R10) / (R9 - R10) ≤ 7.

00.

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

10. An imaging optical lens, characterized in that, The imaging optical lens comprises a total of seven lenses. 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 and the image side surface 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; Among them, the focal length of the imaging optical lens is f, the combined focal length of the first lens and the second lens is f12, the on-axis thickness of the first lens is d1, the on-axis thickness of the second lens is d3, the on-axis thickness of the seventh lens is d13, and the thickness of the first lens in the direction parallel to the optical axis at a radius of 1.5 mm is d1 1.5 , the thickness of the second lens in the direction parallel to the optical axis at a radius of 1.5 mm is d3 1.5 , the thickness of the third lens in the direction parallel to the optical axis at a radius of 1.5 mm is d5 1.5 , the thickness of the fourth lens in the direction parallel to the optical axis at a radius of 1.5 mm is d7 1.5 , the thickness of the fifth lens in the direction parallel to the optical axis at a radius of 1.5 mm is d9 1.5 , the thickness of the sixth lens in the direction parallel to the optical axis at a radius of 1.5 mm is d11 1.5 , the thickness of the seventh lens in the direction parallel to the optical axis at a radius of 1.5 mm is d13 1.5 , the sum of the on-axis thicknesses of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens is Σd, the overall optical length of the imaging optical lens is TTL, and the following relationship is satisfied: 0.90 ≤ d1 1.5 / d13 1.5 ≤ 1.70; 1.00 ≤ (d3 1.5 + d5 1.5 + d7 1.5 ) / (d9 1.5 + d11 1.5 ) ≤ 1.80; 1.10 ≤ d13 1.5 / d13 ≤ 2.00; 0.30 ≤ Σd / TTL ≤ 0.65; 1.20 ≤ (d1 + d3 + d13) / d1 ≤ 2.30; 0.90 ≤ f12 / f ≤ 1.

60.

11. The imaging optical lens according to claim 10, wherein Satisfy the following relationship: 0.38 ≤ Σd / TTL ≤ 0.

58.

12. The imaging optical lens according to claim 10, wherein Satisfy the following relationship: 1.50 ≤ (d1 + d3 + d13) / d1 ≤ 2.

00.

13. The imaging optical lens according to claim 10, wherein Satisfy the following relationship: 1.10 ≤ f12 / f ≤ 1.

40.

14. The imaging optical lens according to claim 10, characterized in that, Satisfy the following relationship: 1.00 ≤ d1 1.5 / d13 1.5 ≤ 1.

50.

15. The imaging optical lens according to claim 10, wherein Satisfy the following relationship: 1.20 ≤ (d3 1.5 + d5 1.5 + d7 1.5 ) / (d9 1.5 + d11 1.5 ) ≤ 1.

55.

16. The imaging optical lens according to claim 10, characterized in that, Satisfy the following relationship: 1.25 ≤ d13 1.5 / d13 ≤ 1.

80.

17. The imaging optical lens according to claim 10, wherein The central curvature radius of the object side surface of the first lens at the paraxial region is R1, and the central curvature radius of the image side surface of the first lens at the paraxial region is R2. Satisfy the following relationship: -2.50 ≤ (R1 + R2) / (R1 - R2) ≤ -1.

60.

18. The imaging optical lens according to claim 10, wherein, The on-axis thickness of the fourth lens is d7, the on-axis distance between the fourth lens and the fifth lens is d8, and the on-axis thickness of the fifth lens is d9. Satisfy the following relationship: 1.10 ≤ (d7 + d9) / d8 ≤ 2.

10.

19. The imaging optical lens according to claim 17, wherein, Satisfy the following relationship: -2.20 ≤ (R1 + R2) / (R1 - R2) ≤ -1.

90.

20. The imaging optical lens according to claim 18, characterized in that, Satisfy the following relationship: 1.40 ≤ (d7 + d9) / d8 ≤ 1.

75.

21. The imaging optical lens according to claim 10, wherein The first lens is a glass lens.

Images