Image capturing optical lens and lens assembly

Abstract

To provide an optical lens, in particular, an image capturing optical lens and lens assembly.SOLUTION: An image capturing optical lens provided herein comprises an aperture stop and seven lenses, the seven lenses consisting of a first lens having positive refractive power, a second lens having negative refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power, and a seventh lens having negative refractive power, arranged in order from the object side to the image side, and satisfies the following conditional expressions: -8.00≤(SAG51 / SD51*R9) / (SAG72 / SD72*R14)≤-3.30, 0.80≤HC71 / SD71≤0.95, 0.85≤HC72 / SD72≤0.97, 1.10≤(d10+d12) / d11≤2.10.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to the field of optical lenses, and more particularly to imaging optical lenses and lens assemblies that are applied to mobile terminal devices such as smartphones and digital cameras, and imaging devices such as monitors, PC lenses, and in-vehicle lenses. [Background technology]

[0002] In recent years, with the rise of various smart devices, the demand for miniaturized imaging optical lenses has been increasing. In addition to the reduction in pixel size of photosensitive elements, current electronic products tend to be lightweight, portable, and highly functional. Therefore, miniaturized imaging optical lenses with good imaging quality have become the mainstream in the current market. To achieve excellent imaging quality, multi-lens structures are often adopted. Furthermore, with technological developments and the increasing diversification of user needs, the pixel area of ​​photosensitive elements is shrinking, and the system requirements for imaging quality are increasing. Therefore, seven-lens structures are gradually appearing in lens designs. There is a demand for imaging lenses with high relative illumination, wide angles, and ease of processing. Summary of the Invention [Problem to be solved by the invention]

[0003] In view of the above problems, an object of the present invention is to provide an imaging optical lens that satisfies the design requirements of high relative illumination, wide angle, and ease of processing. [Means for solving the problem]

[0004] To achieve the above object, the solution of the present invention provides an imaging optical lens, which is composed of a stop and seven lenses, which are, in order from the object side to the image side, a first lens having positive refractive power, a second lens having negative refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power, and a seventh lens having negative refractive power, and the first lens has an object-side surface that is convex on the paraxial line and an image-side surface that is concave on the paraxial line, and the second lens has an object-side surface that is concave on the paraxial line. the third lens has an object side surface convex at the paraxial direction and an image side surface concave at the paraxial direction, the fourth lens has an object side surface convex at the paraxial direction, the fifth lens has an object side surface concave at the paraxial direction and an image side surface concave at the paraxial direction, the sixth lens has an object side surface convex at the paraxial direction and an image side surface concave at the paraxial direction, and the seventh lens has an object side surface convex at the paraxial direction and an image side surface concave at the paraxial direction, The maximum optical radius of the object side surface of the fifth lens is SD51, the arrow height at the maximum optical radius of the object side surface of the fifth lens is SAG51, the maximum optical radius of the image side surface of the seventh lens is SD72, the arrow height at the maximum optical radius of the image side surface of the seventh lens is SAG72, the central radius of curvature at the paraxial surface of the object side surface of the fifth lens is R9, the central radius of curvature at the paraxial surface of the image side surface of the seventh lens is R14, the vertical height from the intersection of the chief ray of a 1.0 field of view and the object side surface of the seventh lens to the optical axis is HC71, the maximum optical radius of the object side surface of the seventh lens is SD71, the vertical height from the intersection of the chief ray of a 1.0 field of view and the image side surface of the seventh lens to the optical axis is Let HC72 be the thickness of the object-side surface of the first lens, SD72 be the maximum optical radius of the image-side surface of the seventh lens, d10 be the axial distance between the fifth lens and the sixth lens, d12 be the axial distance between the sixth lens and the seventh lens, d11 be the axial thickness of the sixth lens, d6 be the axial distance between the third lens and the fourth lens, TTL be the optical length of the imaging optical lens, f6 be the focal length of the sixth lens, f7 be the focal length of the seventh lens, R1 be the central radius of curvature of the object-side surface of the first lens on the paraxial line, R2 be the central radius of curvature of the image-side surface of the first lens on the paraxial line, and f be the focal length of the imaging optical lens. -8.00≦(SAG51 / SD51*R9) / (SAG72 / SD72*R14)≦-3.30 (1) 0.80≦HC71 / SD71≦0.95 (2) 0.85≦HC72 / SD72≦0.97 (3) 1.10≦(d10+d12) / d11≦2.10 (4) 0.007≦d6 / TTL≦0.013 (5) -0.85≦f6 / f7≦-0.45 (6) 1.00≦(R1+R2) / f≦2.10 (7)

[0005] Preferably, when a distance along the optical axis direction from the aperture stop to the center of the object side surface of the first lens is TEP, a height of an arrow at a maximum optical radius of the object side surface of the first lens is SAG11, and a focal length of the first lens is f1, the following conditional expression (8) is satisfied: 0.06≦|TEP / SAG11|*(f / f1)≦0.09 (8)

[0006] Preferably, the following conditional expression (9) is satisfied. -7.10≦(SAG51 / SD51*R9) / (SAG72 / SD72*R14)≦-4.05 (9)

[0007] Preferably, the following conditional expression (10) is satisfied. 1.30≦(d10+d12) / d11≦1.91 (10)

[0008] Preferably, the following conditional expression (11) is satisfied. -0.76≦f6 / f7≦-0.52 (11)

[0009] Preferably, the following conditional expression (12) is satisfied. 1.15≦(R1+R2) / f≦1.85 (12)

[0010] Preferably, when the axial distance between the first lens and the second lens is d2 and the axial distance between the fourth lens and the fifth lens is d8, the following conditional expression (13) is satisfied. 1.95≦d8 / d2≦4.05 (13)

[0011] Preferably, the following conditional expression (14) is satisfied. 2.44≦d8 / d2≦3.40 (14)

[0012] Preferably, the first lens is made of a glass material.

[0013] The present invention further provides an imaging optical lens, the imaging optical lens comprising a stop and seven lenses, the seven lenses being, in order from the object side to the image side, a first lens having positive refractive power, a second lens having negative refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power, and a seventh lens having negative refractive power, the first lens having an object-side surface that is convex on the paraxial line and an image-side surface that is concave on the paraxial line, and the second lens having an object-side surface that is concave on the paraxial line. the third lens has an object side surface convex at the paraxial direction and an image side surface concave at the paraxial direction, the fourth lens has an object side surface convex at the paraxial direction, the fifth lens has an object side surface concave at the paraxial direction and an image side surface concave at the paraxial direction, the sixth lens has an object side surface convex at the paraxial direction and an image side surface concave at the paraxial direction, and the seventh lens has an object side surface convex at the paraxial direction and an image side surface concave at the paraxial direction, The maximum optical radius of the object side surface of the fifth lens is SD51, the arrow height at the maximum optical radius of the object side surface of the fifth lens is SAG51, the maximum optical radius of the image side surface of the seventh lens is SD72, the arrow height at the maximum optical radius of the image side surface of the seventh lens is SAG72, the central radius of curvature at the paraxial surface of the object side surface of the fourth lens is R7, the central radius of curvature at the paraxial surface of the object side surface of the fifth lens is R9, the central radius of curvature at the paraxial surface of the image side surface of the seventh lens is R14, the vertical height from the intersection of the chief ray of a 1.0 field of view and the object side surface of the seventh lens to the optical axis is HC71, the maximum optical radius of the object side surface of the seventh lens is SD71, the arrow height at the maximum optical radius of the image side surface of the seventh lens is SAG72 When the vertical height from the intersection point with the image side surface of the lens to the optical axis is HC72, the maximum optical radius of the image side surface of the seventh lens is SD72, the axial distance between the fifth lens and the sixth lens is d10, the axial distance between the sixth lens and the seventh lens is d12, the axial thickness of the sixth lens is d11, 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 imaging optical lens is f, and the composite focal length of the first lens and the second lens is f12, the following conditional expressions (1) to (4) and (15) to (17) are satisfied. -8.00≦(SAG51 / SD51*R9) / (SAG72 / SD72*R14)≦-3.30 (1) 0.80≦HC71 / SD71≦0.95 (2) 0.85≦HC72 / SD72≦0.97 (3) 1.10≦(d10+d12) / d11≦2.10 (4) -0.88≦f1 / (f2-f3)≦-0.05 (15) 1.10≦f12 / f≦1.60 (16) 2.20≦f4 / R7+f5 / R9≦3.80 (17)

[0014] Preferably, the following conditional expression (18) is satisfied. -0.75≦f1 / (f2-f3)≦-0.06 (18)

[0015] Preferably, the following conditional expression (19) is satisfied. 1.28≦f12 / f≦1.36 (19)

[0016] Preferably, the following conditional expression (20) is satisfied. 2.70≦f4 / R7+f5 / R9≦3.20 (20)

[0017] Preferably, the following conditional expression (9) is satisfied. -7.10≦(SAG51 / SD51*R9) / (SAG72 / SD72*R14)≦-4.05 (9)

[0018] Preferably, the following conditional expression (10) is satisfied. 1.30≦(d10+d12) / d11≦1.91 (10)

[0019] Preferably, when the focal length of the sixth lens is f6 and the focal length of the seventh lens is f7, the following conditional expression (6) is satisfied. -0.85≦f6 / f7≦-0.45 (6)

[0020] Preferably, the following conditional expression (11) is satisfied. -0.76≦f6 / f7≦-0.52 (11)

[0021] Preferably, when a central radius of curvature of the object-side surface of the first lens in a paraxial direction is R1, a central radius of curvature of the image-side surface of the first lens in a paraxial direction is R2, and a focal length of the imaging optical lens is f, the following conditional expression (7) is satisfied: 1.00≦(R1+R2) / f≦2.10 (7)

[0022] Preferably, the following conditional expression (12) is satisfied. 1.15≦(R1+R2) / f≦1.85 (12)

[0023] Preferably, when the focal length of the sixth lens is f6, the following conditional expression (21) is satisfied. 1.65≦|f / f5|+|f / f6|≦2.69 (21)

[0024] Preferably, the following conditional expression (22) is satisfied. 1.96≦|f / f5|+|f / f6|≦2.28 (22)

[0025] Preferably, the first lens is made of a glass material.

[0026] The present invention further provides a lens assembly including the imaging optical lens, wherein each of the first to seventh lenses includes an optical section for imaging and a structural section surrounded around the optical section, the second lens includes a second optical section for imaging and a second structural section surrounded around the second optical section, the third lens includes a third optical section for imaging and a third structural section surrounded around the third optical section, the second structural section includes a first surface close to the image side, and the third lens includes a second surface close to the image side. The structure includes a second surface close to the object side, the first surface includes a first inclined surface close to the second optical portion and a second inclined surface provided on the side of the first inclined surface away from the second optical portion, the second surface includes a third inclined surface close to the third optical portion and a fourth inclined surface provided on the side of the third inclined surface away from the third optical portion, and when the included angle between the first inclined surface and the optical axis is ANG1 and the included angle between the fourth inclined surface and the optical axis is ANG4, the following conditional expression (23) is satisfied. |ANG1-ANG4|≦30° (23)

[0027] Preferably, when the included angle between the second inclined surface and the optical axis is ANG2 and the included angle between the third inclined surface and the optical axis is ANG3, the following conditional expression (24) is satisfied. |ANG2-ANG3|≦10° (24)

[0028] Preferably, the first inclined surface is inclined from inside to outside in a direction approaching the object side, and satisfies the following conditional formula (25), when a paraxial radius of curvature of the image side surface of the second lens is R4 and a maximum optical radius of the image side surface of the second lens is SD22: 3.00≦R4 / SD22*tan(ANG1)≦5.00 (25)

[0029] Preferably, the third inclined surface is inclined from inside to outside in a direction approaching the image side, and satisfies the following conditional formula (26), when a paraxial radius of curvature of the object-side surface of the third lens is R5 and a maximum optical radius of the object-side surface of the third lens is SD31: 1.50≦R5 / SD31*cos(ANG3)≦4.00 (26) [Effects of the Invention]

[0030] The present invention has the following beneficial effects: The imaging optical lens according to the present invention has excellent optical properties, high relative illumination, a wide angle, and is easy to process, and is particularly applicable to imaging lens assemblies for mobile phones, web imaging lenses, and vehicle-mounted lenses, which are configured using imaging elements such as high-pixel CCDs and CMOSs. In order to more clearly explain the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for the embodiments. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can further obtain other drawings based on these drawings without any creative work. [Brief explanation of the drawings]

[0031] [Figure 1] 1 is a schematic diagram showing the configuration of an imaging optical lens according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a schematic diagram showing axial chromatic aberration of the imaging optical lens shown in FIG. [Figure 3] 2 is a schematic diagram showing chromatic aberration of magnification of the imaging optical lens shown in FIG. [Figure 4] 2 is a schematic diagram showing the curvature of field and distortion of the imaging optical lens shown in FIG. [Figure 5] FIG. 4 is a schematic diagram showing the configuration of an imaging optical lens according to a second embodiment of the present invention. [Figure 6] FIG. 6 is a schematic diagram showing the longitudinal chromatic aberration of the imaging optical lens shown in FIG. [Figure 7] FIG. 6 is a schematic diagram showing chromatic aberration of magnification of the imaging optical lens shown in FIG. [Figure 8] 6 is a schematic diagram showing the curvature of field and distortion of the imaging optical lens shown in FIG. 5. [Figure 9] FIG. 10 is a schematic diagram showing the configuration of an imaging optical lens according to a third embodiment of the present invention. [Figure 10] FIG. 10 is a schematic diagram showing the longitudinal chromatic aberration of the imaging optical lens shown in FIG. [Figure 11] FIG. 10 is a schematic diagram showing chromatic aberration of magnification of the imaging optical lens shown in FIG. [Figure 12] 10A and 10B are schematic diagrams showing the curvature of field and distortion of the imaging optical lens shown in FIG. [Figure 13] FIG. 10 is a schematic diagram showing the configuration of an imaging optical lens according to a fourth embodiment of the present invention. [Figure 14] FIG. 14 is a schematic diagram showing the longitudinal chromatic aberration of the imaging optical lens shown in FIG. [Figure 15] FIG. 14 is a schematic diagram showing chromatic aberration of magnification of the imaging optical lens shown in FIG. [Figure 16] 14 is a schematic diagram showing the curvature of field and distortion of the imaging optical lens shown in FIG. 13. [Figure 17] FIG. 10 is a schematic diagram showing the configuration of an imaging optical lens according to a fifth embodiment of the present invention. [Figure 18] FIG. 18 is a schematic diagram showing the longitudinal chromatic aberration of the imaging optical lens shown in FIG. [Figure 19] 18 is a schematic diagram showing chromatic aberration of magnification of the imaging optical lens shown in FIG. 17. [Figure 20] 18A and 18B are schematic diagrams showing the curvature of field and distortion of the imaging optical lens shown in FIG. 17. [Figure 21] FIG. 10 is a schematic diagram showing the configuration of an imaging optical lens according to a sixth embodiment of the present invention. [Figure 22] FIG. 22 is a schematic diagram showing the longitudinal chromatic aberration of the imaging optical lens shown in FIG. 21. [Figure 23] 22 is a schematic diagram showing chromatic aberration of magnification of the imaging optical lens shown in FIG. 21. [Figure 24] 22A and 22B are schematic diagrams showing the curvature of field and distortion of the imaging optical lens shown in FIG. 21. [Figure 25]FIG. 10 is a schematic diagram showing the configuration of an imaging optical lens according to a seventh embodiment of the present invention. [Figure 26] FIG. 26 is a schematic diagram showing the longitudinal chromatic aberration of the imaging optical lens shown in FIG. [Figure 27] FIG. 26 is a schematic diagram showing chromatic aberration of magnification of the imaging optical lens shown in FIG. 25. [Figure 28] 26 is a schematic diagram showing the curvature of field and distortion of the imaging optical lens shown in FIG. 25. [Figure 29] FIG. 13 is a schematic diagram showing the configuration of an imaging optical lens according to an eighth embodiment of the present invention. [Figure 30] FIG. 30 is a schematic diagram showing the longitudinal chromatic aberration of the imaging optical lens shown in FIG. 29. [Figure 31] FIG. 30 is a schematic diagram showing chromatic aberration of magnification of the imaging optical lens shown in FIG. 29. [Figure 32] 30 is a schematic diagram showing the curvature of field and distortion of the imaging optical lens shown in FIG. 29. [Figure 33] 1 is a schematic diagram illustrating a configuration of an imaging assembly according to the present invention. [Figure 34] FIG. 34 is a schematic diagram showing the configuration of the second lens in FIG. 33. [Figure 35] FIG. 34 is a schematic diagram showing the configuration of a third lens in FIG. 33. DETAILED DESCRIPTION OF THE INVENTION

[0032] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following detailed description of each embodiment of the present invention will be given with reference to the drawings. However, it will be understood by those skilled in the art that many technical details are described in each embodiment of the present invention to better understand the present invention. However, the technical solutions to be protected by the present invention can be realized without these technical details and various changes and modifications based on the following embodiments.

[0033] As shown in Figures 1 to 32, the technical solution of the present invention provides imaging optical lenses 10, 20, 30, 40, 50, 60, 70, and 80. Figures 1, 5, 9, 13, 17, 21, 25, and 29 show imaging optical lenses 10, 20, 30, 40, 50, 60, 70, and 80 according to the present invention, each of which includes seven lenses. Specifically, the imaging optical lens includes, in order from the object side to the image side, a diaphragm S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An optical element such as an optical filter GF may be provided between the seventh lens L7 and an image plane Si.

[0034] As shown in FIGS. 33 to 35, the technical solution of the present invention further provides a lens assembly 100, in which each of the first to seventh lenses includes an optical portion for imaging and a structural portion surrounding the optical portion, the second lens L2 includes a second optical portion L21 for imaging and a second structural portion L22 surrounding the second optical portion L21, the third lens L3 includes a third optical portion L31 for imaging and a third structural portion L32 surrounding the third optical portion L31, the second structural portion L22 includes a first surface L23 adjacent to the image side, and the third structural portion L32 is adjacent to the object side. The first surface L23 includes a first inclined surface L231 close to the second optical portion L21 and a second inclined surface L232 provided on the side of the first inclined surface L231 away from the second optical portion L21, and the second surface L33 includes a third inclined surface L331 close to the third optical portion L31 and a fourth inclined surface L332 provided on the side of the third inclined surface L331 away from the third optical portion L31, and when the included angle between the first inclined surface L231 and the optical axis X is ANG1 and the included angle between the fourth inclined surface L332 and the optical axis X is ANG4, the conditional formula |ANG1-ANG4|≦30° is satisfied.

[0035] If the angle between the second inclined surface L232 and the optical axis X is defined as ANG2, and the angle between the third inclined surface L331 and the optical axis X is defined as ANG3, then the conditional expression |ANG2-ANG3|≦10° is satisfied.

[0036] The first inclined surface L231 is inclined from inward to outward in a direction approaching the object side, and satisfies the conditional expression 3.00≦R4 / SD22*tan(ANG1)≦5.00, where R4 is the paraxial radius of curvature of the image side surface of the second lens and SD22 is the maximum optical radius of the image side surface of the second lens. When the image side surface of the second lens is concave, the first inclined surface is inclined toward the object side, which effectively controls the differences in height and thickness between the optical unit and the structural unit, which is more advantageous for molding, and controlling the inclination angle is also advantageous for reducing stray light.

[0037] The third inclined surface L331 is inclined from inward to outward in a direction approaching the image side, and satisfies the conditional formula 1.50≦R5 / SD31*cos(ANG3)≦4.00, where R5 is the paraxial radius of curvature of the object-side surface of the third lens and SD31 is the maximum optical radius of the object-side surface of the third lens. The inclination of the third inclined surface toward the image side effectively controls the differences in height and thickness between the optical unit and the structural unit, which is more advantageous for molding, and controlling the inclination angle is also advantageous for reducing stray light.

[0038] 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, although each lens may be made of other materials.

[0039] The first lens has positive refractive power, and its object side surface is convex on the paraxial line and its image side surface is concave on the paraxial line; the second lens has negative refractive power, and its object side surface is convex on the paraxial line and its image side surface is concave on the paraxial line; the third lens has negative refractive power, and its object side surface is convex on the paraxial line and its image side surface is concave on the paraxial line; the fourth lens has positive refractive power, and its object side surface is convex on the paraxial line and its image side surface is convex or concave on the paraxial line; the fifth lens has negative refractive power, and its object side surface is concave on the paraxial line and its image side surface is concave on the paraxial line; the sixth lens has positive refractive power, and its object side surface is convex on the paraxial line and its image side surface is concave on the paraxial line; and the seventh lens has negative refractive power, and its object side surface is convex on the paraxial line and its image side surface is concave on the paraxial line.

[0040] The object-side 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 aspheric.

[0041] If we define the maximum optical radius of the object-side surface of the fifth lens as SD51, the arrow height at the maximum optical radius of the object-side surface of the fifth lens as SAG51, the maximum optical radius of the image-side surface of the seventh lens as SD72, the arrow height at the maximum optical radius of the image-side surface of the seventh lens as SAG72, the central radius of curvature of the paraxial surface of the object-side surface of the fifth lens as R9, and the central radius of curvature of the paraxial surface of the image-side surface of the seventh lens as R14, then the conditional expression -8.00≦(SAG51 / SD51*R9) / (SAG72 / SD72*R14)≦-3.30 is satisfied. Within this range, both the object-side surfaces of the fifth lens and the seventh lens have surface shapes that are easy to process, improving processability. Preferably, the conditional expression -7.10≦(SAG51 / SD51*R9) / (SAG72 / SD72*R14)≦-4.05 is satisfied. Here, the arrow height refers to the distance along the optical axis from a point on the surface to the center point of the surface on the optical axis, with the right side of the center point being positive and the left side of the center point being negative.

[0042] If we define HC71 as the vertical height from the intersection of the chief ray of the 1.0 field of view and the object-side surface of the seventh lens element to the optical axis, and SD71 as the maximum optical radius of the object-side surface of the seventh lens element, then the condition 0.80≦HC71 / SD71≦0.95 is satisfied. Within this range, the relative illuminance in the peripheral field of view is increased and a sufficiently large angle of view is ensured.

[0043] If we define HC72 as the vertical height from the intersection of the chief ray of the 1.0 field of view and the image-side surface of the seventh lens element to the optical axis and SD72 as the maximum optical radius of the image-side surface of the seventh lens element, then the conditional expression 0.85≦HC72 / SD72≦0.97 is satisfied. Within this range, the relative illuminance in the peripheral field of view is increased and a sufficiently large angle of view is ensured.

[0044] If we define the axial distance between the fifth and sixth lenses as d10, the axial distance between the sixth and seventh lenses as d12, and the axial thickness of the sixth lens as d11, then the condition 1.10≦(d10+d12) / d11≦2.10 is satisfied. Rational control of the central thickness of the sixth lens and the air gaps before and after it is beneficial for improving the yield of assembling the last three lenses. Preferably, the condition 1.30≦(d10+d12) / d11≦1.91 is satisfied.

[0045] If the axial distance between the third and fourth lenses is defined as d6 and the optical length of the imaging optical lens is defined as TTL, the conditional expression 0.007≦d6 / TTL≦0.013 is satisfied. Rational control of the ratio between the axial distance and the optical length of the third and fourth lenses is advantageous for achieving an extremely thin lens.

[0046] If the focal length of the sixth lens is defined as f6 and the focal length of the seventh lens as f7, the conditional expression -0.85≦f6 / f7≦-0.45 is satisfied. This allows the refractive powers of the sixth and seventh lenses to be adjusted, which is advantageous for volume compression and aberration correction. Preferably, the conditional expression -0.76≦f6 / f7≦-0.52 is satisfied.

[0047] If the central radius of curvature of the object-side surface of the first lens on the paraxial line is defined as R1, the central radius of curvature of the image-side surface of the first lens on the paraxial line is defined as R2, and the focal length of the imaging optical lens is defined as f, then the conditional expression 1.00≦(R1+R2) / f≦2.10 is satisfied. This range is advantageous for shortening the overall system length. Preferably, the conditional expression 1.15≦(R1+R2) / f≦1.85 is satisfied.

[0048] If we define TEP as the distance along the optical axis from the aperture stop to the center of the object-side surface of the first lens element, SAG11 as the arrow height at the maximum optical radius of the object-side surface of the first lens element, and f1 as the focal length of the first lens element, then the conditional expression 0.06≦|TEP / SAG11|*(f / f1)≦0.09 is satisfied. Within this range, the aperture stop protrudes outward, providing more space for external installation of the aperture stop, which is advantageous for the structural design of the variable aperture stop.

[0049] If the axial distance between the first and second lenses is defined as d2, and the axial distance between the fourth and fifth lenses is defined as d8, then the condition 1.95≦d8 / d2≦4.05 is satisfied. By being able to rationally control the air gap between the lenses, the system not only has high imaging quality but also good processing characteristics. Preferably, the condition 2.44≦d8 / d2≦3.40 is satisfied.

[0050] If the focal length of the first lens is defined as f1, the focal length of the second lens as f2, and the focal length of the third lens as f3, then the conditional expression -0.88≦f1 / (f2-f3)≦-0.05 is satisfied. Within this range, it is advantageous for correcting chromatic aberration and also makes it possible to achieve a balance between various aberrations. Preferably, the conditional expression -0.75≦f1 / (f2-f3)≦-0.06 is satisfied.

[0051] If the focal length of the imaging optical lens is defined as f and the combined focal length of the first lens and the second lens as f12, then the conditional expression 1.10≦f12 / f≦1.60 is satisfied. By rationally arranging the focal lengths of the first lens L1 and the second lens L2, chromatic aberration is eliminated, spherical aberration is reduced, astigmatism is corrected, and resolving power is improved. Preferably, the conditional expression 1.28≦f12 / f≦1.36 is satisfied.

[0052] If we define the focal length of the fourth lens as f4, the focal length of the fifth lens as f5, the paraxial central radius of curvature of the object-side surface of the fourth lens as R7, and the paraxial central radius of curvature of the object-side surface of the fifth lens as R9, then the conditional expression 2.20≦f4 / R7+f5 / R9≦3.80 is satisfied. This allows for rational control of the ratio between the radii of curvature and the focal lengths of the object-side surfaces of the fourth and fifth lenses, achieving a wider angle of view and advantageously increasing the processing yield of the fourth and fifth lenses. Preferably, the conditional expression 2.70≦f4 / R7+f5 / R9≦3.20 is satisfied.

[0053] If the focal length of the fifth lens is defined as f5, the focal length of the sixth lens as f6, and the focal length of the imaging optical lens as f, then the conditional expression 1.65≦|f / f5|+|f / f6|≦2.69 is satisfied. By rationally arranging the refractive power of each lens, it is advantageous to achieve a high-pixel imaging effect. Preferably, the conditional expression 1.96≦|f / f5|+|f / f6|≦2.28 is satisfied.

[0054] If the first lens is defined as a glass material, the combination of the glass lens and the resin lens can reduce chromatic aberration and improve the performance of the optical imaging lens.

[0055] Compared with the prior art, the imaging optical lens of the present invention is configured to satisfy the conditional formulas -8.00≦(SAG51 / SD51*R9) / (SAG72 / SD72*R14)≦-3.30, 0.80≦HC71 / SD71≦0.95, 0.85≦HC72 / SD72≦0.97, 1.10≦(d10+d12) / d11≦2.10, 0.007≦d6 / TTL≦0.013, -0.85≦f6 / f7≦-0.45, 1.00≦(R1+R2) / f≦2.10, which makes it easier to process and achieves the technical effects of high relative illumination, wide angle, high assembly yield, and ultra-thin design.

[0056] Compared with the prior art, the imaging optical lens of the present invention is configured to satisfy the conditional expressions -8.00≦(SAG51 / SD51*R9) / (SAG72 / SD72*R14)≦-3.30, 0.80≦HC71 / SD71≦0.95, 0.85≦HC72 / SD72≦0.97, 1.10≦(d10+d12) / d11≦2.10, -0.88≦f1 / (f2-f3)≦-0.05, 1.10≦f12 / f≦1.60, 2.20≦f4 / R7+f5 / R9≦3.80, which makes it easier to process and achieves the technical effects of high relative illumination, wide angle, small chromatic aberration, small spherical aberration, small astigmatism, high resolution, and high processing yield.

[0057] The imaging optical lens of the present invention will be described below using examples. The symbols used in each example are as follows: The focal length, axial distance, central radius of curvature, and axial thickness are all in mm.

[0058] TTL is the optical length of the imaging optical lens (the axial distance from the object side surface of the first lens L1 to the image plane Si) and is expressed in mm.

[0059] The aperture value FNO is the ratio of the effective focal length of the imaging optical lens to the entrance pupil diameter.

[0060] Next, the technical solution of the present invention will be specifically explained in eight embodiments, but if the above conditional expressions are not satisfied, the technical effect of the present invention cannot be realized.

[0061] (First embodiment) Tables 1 and 2 show design data for the imaging optical lens 10 according to the first embodiment of the present invention.

[0062] [Table 1]

[0063] Here, the meaning of each symbol is as follows: S1: Aperture R: Radius of curvature at the center of the optical surface R1: central radius of curvature of the object side surface of the first lens L1 on the paraxial line R2: central radius of curvature of the image side surface of the first lens L1 on the paraxial line R3: The central radius of curvature of the object-side surface of the second lens L2 on the paraxial line R4: The central radius of curvature of the image side of the second lens L2 on the paraxial line R5: The central radius of curvature of the object-side surface of the third lens L3 on the paraxial line R6: The central radius of curvature of the image side of the third lens L3 on the paraxial line R7: The central radius of curvature of the object-side surface of the fourth lens L4 on the paraxial line R8: The central radius of curvature of the image side of the fourth lens L4 on the paraxial line R9: The central radius of curvature of the object-side surface of the fifth lens L5 on the paraxial line R10: The central radius of curvature of the image side of the fifth lens L5 on the paraxial line R11: The central radius of curvature of the object side surface of the sixth lens L6 on the paraxial line R12: The central radius of curvature of the image side of the sixth lens L6 on the paraxial line R13: The central radius of curvature of the object side surface of the seventh lens L7 on the paraxial line R14: The central radius of curvature of the seventh lens L7 on the image side at the paraxial R15: Radius of curvature of the center of the object side of the optical filter GF R16: Radius of curvature of the center of the image side of the optical filter GF d: Axial thickness of lens, axial distance between lenses d0: On-axis distance from aperture S1 to the object side of the first lens L1 d1: Axial thickness of the first lens L1 d2: On-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2 d3: Axial thickness of the second lens element L2 d4: The axial distance from the image side surface of the second lens L2 to the object side surface of the third lens L3 d5: Axial thickness of the third lens element L3 d6: On-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4 d7: Axial thickness of the fourth lens element L4 d8: The axial distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5 d9: Axial thickness of the fifth lens element L5 d10: the axial distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6 d11: Axial thickness of the sixth lens element L6 d12: the axial distance from the image side surface of the sixth lens L6 to the object side surface of the seventh lens L7 d13: Axial thickness of the seventh lens element L7 d14: The axial distance from the image side surface of the seventh lens L7 to the object side surface of the optical filter GF d15: On-axis thickness of optical filter GF d16: On-axis distance from the image side of the optical filter GF to the image plane Si nd: Refractive index of the d line (d line is green light with a wavelength of 550 nm) nd1: refractive index of the first lens L1 at the d line nd2: refractive index of the d line of the second lens L2 nd3: refractive index of the d line of the third lens L3 nd4: Refractive index of the d line of the fourth lens L4 nd5: refractive index of the d line of the fifth lens L5 nd6: Refractive index of the d line of the sixth lens L6 nd7: Refractive index of the d line of the seventh lens L7 ndg: refractive index of the d line of the optical filter GF vd: Abbe number v1: Abbe number of the first lens L1 v2: Abbe number of the second lens L2 v3: Abbe number of the third lens element L3 v4: Abbe number of the fourth lens element L4 v5: Abbe number of the fifth lens element L5 v6: Abbe number of the sixth lens element L6 v7: Abbe number of the seventh lens element L7 vg: Abbe number of the optical filter GF

[0064] Table 2 shows the aspheric surface data of each lens in the imaging optical lens 10 of the first embodiment according to the present invention.

[0065] [Table 2]

[0066] For convenience, the aspherical surface of each lens surface is expressed by the following formula (27): However, the present invention is not particularly limited to the form of the aspherical polynomial of formula (27).

[0067] z=(cr 2 ) / {1+[1-(k+1)(c 2 r 2 )] 1 / 2}+A4r 4 +A6r 6 +A8r 8 +A10r 10 +A12r 12 +A14r 14 +A16r 16 +A18r 18 +A20r 20 +A22r 22 +A24r 24 +A26r 26 +A28r 28 +A30r 30 (27)

[0068] where k is a conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 are aspheric coefficients, c is the curvature at the center of the optical surface, r is the perpendicular distance between a point on the aspheric curve and the optical axis, and z is the aspheric depth (the perpendicular distance between a point on the aspheric surface that is at a distance r from the optical axis and a tangent plane that is tangent to the vertex of the aspheric surface on the optical axis).

[0069] 2 and 3 are schematic diagrams showing the axial chromatic aberration and chromatic aberration of magnification of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm, respectively, after passing through the imaging optical lens 10 according to the first embodiment. Fig. 4 is a schematic diagram showing the curvature of field and distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 10 according to the first embodiment. In Fig. 4, the curvature of field S is the curvature of field in the sagittal direction, and T is the curvature of field in the tangential direction.

[0070] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 10 is 5.103 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 8.250 mm, the angle of view FOV in the diagonal direction of the full field of view (1.0 field of view) is 84.25°, and the angle of view FOV in the diagonal direction of the MIC field of view is 85.17°. The imaging optical lens 10 satisfies the design requirements of high relative illumination, wide angle, and ease of processing, and its axial and off-axial chromatic aberrations are sufficiently corrected, and it has excellent optical characteristics.

[0071] As can be understood, the image height of the 1.0 field of view refers to half the diagonal length of the sensor's effective pixel area, the image height of the MIC field of view refers to the field of view height that extends outward beyond the image height of the 1.0 field of view to prevent assembly misalignment, the FOV in the diagonal direction of the 1.0 field of view refers to the angle of view corresponding to the sensor's effective pixel area, and the FOV in the diagonal direction of the MIC field of view refers to the angle of view corresponding to the image height of the MIC field of view.

[0072] (Second embodiment) The meanings of the symbols in the second embodiment are the same as those in the first embodiment.

[0073] FIG. 5 shows an imaging optical lens 20 according to a second embodiment of the present invention.

[0074] Tables 3 and 4 show design data for the imaging optical lens 20 according to the second embodiment of the present invention.

[0075] [Table 3]

[0076] Table 4 shows the aspheric data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.

[0077] [Table 4]

[0078] Figures 6 and 7 are schematic diagrams showing the axial chromatic aberration and chromatic aberration of magnification of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm after passing through the imaging optical lens 20 according to the second embodiment. Figure 8 is a schematic diagram showing the curvature of field and distortion of light with wavelength of 555 nm after passing through the imaging optical lens 20 according to the second embodiment. In Figure 8, the curvature of field S is the curvature of field in the sagittal direction, and T is the curvature of field in the tangential direction.

[0079] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 20 is 5.140 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 8.250 mm, the angle of view FOV in the diagonal direction of the full field of view (1.0 field of view) is 83.85°, and the angle of view FOV in the diagonal direction of the MIC field of view is 85.22°. The imaging optical lens 20 satisfies the design requirements of high relative illumination, wide angle, and ease of processing, and its axial and off-axial chromatic aberrations are sufficiently corrected, and it has excellent optical characteristics.

[0080] (Third embodiment) The meanings of the symbols in the third embodiment are the same as those in the first embodiment.

[0081] FIG. 9 shows an imaging optical lens 30 according to a third embodiment of the present invention.

[0082] Tables 5 and 6 show design data for the imaging optical lens 30 according to the third embodiment of the present invention.

[0083] [Table 5]

[0084] Table 6 shows the aspheric surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.

[0085] [Table 6]

[0086] 10 and 11 are schematic diagrams showing the axial chromatic aberration and chromatic aberration of magnification of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm, respectively, after passing through the imaging optical lens 30 according to the third embodiment. Fig. 12 is a schematic diagram showing the curvature of field and distortion of light with wavelength of 555 nm after passing through the imaging optical lens 30 according to the third embodiment. In Fig. 12, the curvature of field S is the curvature of field in the sagittal direction, and T is the curvature of field in the tangential direction.

[0087] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 30 is 5.061 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 8.250 mm, the angle of view FOV in the diagonal direction of the full field of view (1.0 field of view) is 84.53°, and the angle of view FOV in the diagonal direction of the MIC field of view is 85.64°. The imaging optical lens 30 satisfies the design requirements of high relative illumination, wide angle, and ease of processing, and its axial and off-axial chromatic aberrations are sufficiently corrected, and it has excellent optical characteristics.

[0088] (Fourth embodiment) The meanings of the symbols in the fourth embodiment are the same as those in the first embodiment.

[0089] FIG. 13 shows an imaging optical lens 40 according to a fourth embodiment of the present invention.

[0090] Tables 7 and 8 show design data for the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0091] [Table 7]

[0092] Table 8 shows the aspheric surface data of each lens in the imaging optical lens 40 according to the fourth embodiment of the present invention.

[0093] [Table 8]

[0094] 14 and 15 are schematic diagrams showing the axial chromatic aberration and chromatic aberration of magnification of light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm, respectively, after passing through the imaging optical lens 40 according to the fourth embodiment. Fig. 16 is a schematic diagram showing the curvature of field and distortion of light having a wavelength of 555 nm after passing through the imaging optical lens 40 according to the fourth embodiment. In Fig. 16, the curvature of field S is the curvature of field in the sagittal direction, and T is the curvature of field in the tangential direction.

[0095] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 40 is 5.077 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 angle of view FOV in the diagonal direction of the full field of view (1.0 field of view) is 83.00°, and the angle of view FOV in the diagonal direction of the MIC field of view is 84.97°. The imaging optical lens 40 satisfies the design requirements of high relative illumination, wide angle, and ease of processing, its on-axis and off-axis chromatic aberrations are sufficiently corrected, and it has excellent optical characteristics.

[0096] (Fifth embodiment) The meanings of the symbols in the fifth embodiment are the same as those in the first embodiment.

[0097] FIG. 17 shows an imaging optical lens 50 according to a fifth embodiment of the present invention.

[0098] Tables 9 and 10 show design data for the imaging optical lens 50 according to the fifth embodiment of the present invention.

[0099] [Table 9]

[0100] Table 10 shows the aspheric data of each lens in the imaging optical lens 50 according to the fifth embodiment of the present invention.

[0101] [Table 10]

[0102] 18 and 19 are schematic diagrams showing the axial chromatic aberration and chromatic aberration of magnification of light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm, respectively, after passing through the imaging optical lens 50 according to the fifth embodiment. Fig. 20 is a schematic diagram showing the curvature of field and distortion of light having a wavelength of 555 nm after passing through the imaging optical lens 50 according to the fifth embodiment. In Fig. 20, the curvature of field S is the curvature of field in the sagittal direction, and T is the curvature of field in the tangential direction.

[0103] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 50 is 5.094 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 8.250 mm, the angle of view FOV in the diagonal direction of the full field of view (1.0 field of view) is 84.17°, and the angle of view FOV in the diagonal direction of the MIC field of view is 85.32°. The imaging optical lens 50 satisfies the design requirements of high relative illumination, wide angle, and ease of processing, and its axial and off-axial chromatic aberrations are sufficiently corrected, and it has excellent optical characteristics.

[0104] (Sixth embodiment) The meanings of the symbols in the sixth embodiment are the same as those in the first embodiment.

[0105] FIG. 21 shows an imaging optical lens 60 according to a sixth embodiment of the present invention.

[0106] Tables 11 and 12 show design data for the imaging optical lens 60 according to the sixth embodiment of the present invention.

[0107] [Table 11]

[0108] Table 12 shows the aspheric surface data of each lens in the imaging optical lens 60 according to the sixth embodiment of the present invention.

[0109] [Table 12]

[0110] 22 and 23 are schematic diagrams showing the axial chromatic aberration and chromatic aberration of magnification of light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm, respectively, after passing through the imaging optical lens 60 according to the sixth embodiment. Fig. 24 is a schematic diagram showing the curvature of field and distortion of light having a wavelength of 555 nm after passing through the imaging optical lens 60 according to the sixth embodiment. In Fig. 24, the curvature of field S is the curvature of field in the sagittal direction, and T is the curvature of field in the tangential direction.

[0111] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 60 is 5.088 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 8.250 mm, the angle of view FOV in the diagonal direction of the full field of view (1.0 field of view) is 84.75°, and the angle of view FOV in the diagonal direction of the MIC field of view is 86.48°. The imaging optical lens 60 satisfies the design requirements of high relative illumination, wide angle, and ease of processing, and its axial and off-axial chromatic aberrations are sufficiently corrected, and it has excellent optical characteristics.

[0112] (Seventh embodiment) The meanings of the symbols in the seventh embodiment are the same as those in the first embodiment.

[0113] FIG. 25 shows an imaging optical lens 70 according to a seventh embodiment of the present invention.

[0114] Tables 13 and 14 show design data for the imaging optical lens 70 according to the seventh embodiment of the present invention.

[0115] [Table 13]

[0116] Table 14 shows the aspheric surface data of each lens in the imaging optical lens 70 of the seventh embodiment according to the present invention.

[0117] [Table 14]

[0118] 26 and 27 are schematic diagrams showing the axial chromatic aberration and chromatic aberration of magnification of light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm, respectively, after passing through the imaging optical lens 70 according to the seventh embodiment. Fig. 28 is a schematic diagram showing the curvature of field and distortion of light having a wavelength of 555 nm after passing through the imaging optical lens 70 according to the seventh embodiment. In Fig. 28, the curvature of field S is the curvature of field in the sagittal direction, and T is the curvature of field in the tangential direction.

[0119] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 70 is 4.973 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 8.250 mm, the angle of view FOV in the diagonal direction of the full field of view (1.0 field of view) is 85.80°, and the angle of view FOV in the diagonal direction of the MIC field of view is 88.17°. The imaging optical lens 70 satisfies the design requirements of high relative illumination, wide angle, and ease of processing, and its axial and off-axial chromatic aberrations are sufficiently corrected, and it has excellent optical characteristics.

[0120] (Eighth embodiment) The meanings of the symbols in the eighth embodiment are the same as those in the first embodiment.

[0121] FIG. 29 shows an imaging optical lens 80 according to an eighth embodiment of the present invention.

[0122] Tables 15 and 16 show design data for the imaging optical lens 80 according to the eighth embodiment of the present invention.

[0123] [Table 15]

[0124] Table 16 shows the aspheric surface data of each lens in the imaging optical lens 80 of the eighth embodiment according to the present invention.

[0125] [Table 16]

[0126] 30 and 31 are schematic diagrams showing the axial chromatic aberration and chromatic aberration of magnification of light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm, respectively, after passing through the imaging optical lens 80 according to the eighth embodiment. Fig. 32 is a schematic diagram showing the curvature of field and distortion of light having a wavelength of 555 nm after passing through the imaging optical lens 80 according to the eighth embodiment, where the curvature of field S in Fig. 32 is the curvature of field in the sagittal direction and T is the curvature of field in the tangential direction.

[0127] In this embodiment, the entrance pupil diameter ENPD of the imaging optical lens 80 is 5.136 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 8.250 mm, the angle of view FOV in the diagonal direction of the full field of view (1.0 field of view) is 85.58°, and the angle of view FOV in the diagonal direction of the MIC field of view is 87.71°. The imaging optical lens 80 satisfies the design requirements of high relative illumination, wide angle, and ease of processing, and its axial and off-axial chromatic aberrations are sufficiently corrected, and it has excellent optical characteristics.

[0128] Table 17 below shows values ​​corresponding to the parameters defined by various numerical values ​​and conditional expressions in each of the first, second, third, fourth, fifth, sixth, seventh and eighth embodiments.

[0129] [Table 17]

[0130] As will be understood by those skilled in the art, the above-described embodiments are specific embodiments for realizing the present invention, and in actual applications, various changes in form and details are possible without departing from the spirit and scope of the present invention.

Claims

1. An imaging optical lens, comprising: The imaging optical lens is configured by a stop and seven lenses, and the seven lenses are, in order from the object side to the image side, a first lens having positive refractive power, a second lens having negative refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power, and a seventh lens having negative refractive power, and the object side surface of the first lens is a convex surface on the paraxial line and the image side surface is a concave surface on the paraxial line, and the object side surface of the second lens is a concave surface on the paraxial line. the third lens has an object side surface that is convex at the paraxial direction and an image side surface that is concave at the paraxial direction, the fourth lens has an object side surface that is convex at the paraxial direction, the fifth lens has an object side surface that is concave at the paraxial direction and an image side surface that is concave at the paraxial direction, the sixth lens has an object side surface that is convex at the paraxial direction and an image side surface that is concave at the paraxial direction, and the seventh lens has an object side surface that is convex at the paraxial direction and an image side surface that is concave at the paraxial direction, The maximum optical radius of the object side surface of the fifth lens is SD51, the arrow height at the maximum optical radius of the object side surface of the fifth lens is SAG51, the maximum optical radius of the image side surface of the seventh lens is SD72, the arrow height at the maximum optical radius of the image side surface of the seventh lens is SAG72, the central radius of curvature at the paraxial line of the object side surface of the fifth lens is R9, the central radius of curvature at the paraxial line of the image side surface of the seventh lens is R14, the vertical height from the intersection of the chief ray of a 1.0 field of view and the object side surface of the seventh lens to the optical axis is HC71, the maximum optical radius of the object side surface of the seventh lens is SD71, the vertical height from the intersection of the chief ray of a 1.0 field of view and the image side surface of the seventh lens to the optical axis is HC72, an axial distance between the fifth lens and the sixth lens is d10; an axial distance between the sixth lens and the seventh lens is d12; an axial thickness of the sixth lens is d11; an axial distance between the third lens and the fourth lens is d6; an optical length of the imaging optical lens is TTL; a focal length of the sixth lens is f6; a focal length of the seventh lens is f7; a central radius of curvature of the object-side surface of the first lens on a paraxial line is R1; a central radius of curvature of the image-side surface of the first lens on a paraxial line is R2; and a focal length of the imaging optical lens is f. -8.00≦(SAG51 / SD51*R9) / (SAG72 / SD72*R14)≦-3.30 (1) 0.80≦HC71 / SD71≦0.95 (2) 0.85≦HC72 / SD72≦0.97 (3) 1.10≦(d10+d12) / d11≦2.10 (4) 0.007≦d6 / TTL≦0.013 (5) −0.85≦f6 / f7≦−0.45 (6) 1.00≦(R1+R2) / f≦2.10 (7)

2. 2. The imaging optical lens according to claim 1, wherein the following conditional expression (8) is satisfied when TEP is a distance along the optical axis direction from the aperture stop to a center of the object-side surface of the first lens, SAG11 is an arrow height at a maximum optical radius of the object-side surface of the first lens, and f1 is a focal length of the first lens. 0.06≦|TEP / SAG11|*(f / f1)≦0.09 (8)

3. 2. The imaging optical lens according to claim 1, wherein the following conditional expression (9) is satisfied: -7.10≦(SAG51 / SD51*R9) / (SAG72 / SD72*R14)≦-4.05 (9)

4. 2. The imaging optical lens according to claim 1, wherein the following conditional expression (10) is satisfied: 1.30≦(d10+d12) / d11≦1.91 (10)

5. 2. The imaging optical lens according to claim 1, wherein the following conditional expression (11) is satisfied: −0.76≦f6 / f7≦−0.52 (11)

6. 2. The imaging optical lens according to claim 1, wherein the following conditional expression (12) is satisfied: 1.15≦(R1+R2) / f≦1.85 (12)

7. 2. The imaging optical lens according to claim 1, wherein the following conditional expression (13) is satisfied when an axial distance between the first lens and the second lens is d2 and an axial distance between the fourth lens and the fifth lens is d8: 1.95≦d8 / d2≦4.05 (13)

8. 8. The imaging optical lens according to claim 7, wherein the following conditional expression (14) is satisfied: 2.44≦d8 / d2≦3.40 (14)

9. The imaging optical lens according to claim 1 , wherein the first lens is made of glass.

10. An imaging optical lens, comprising: The imaging optical lens is configured by a stop and seven lenses, and the seven lenses are, in order from the object side to the image side, a first lens having positive refractive power, a second lens having negative refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, a fifth lens having negative refractive power, a sixth lens having positive refractive power, and a seventh lens having negative refractive power, and the object side surface of the first lens is a convex surface on the paraxial line and the image side surface is a concave surface on the paraxial line, and the object side surface of the second lens is a concave surface on the paraxial line. the third lens has an object side surface that is convex at the paraxial direction and an image side surface that is concave at the paraxial direction, the fourth lens has an object side surface that is convex at the paraxial direction, the fifth lens has an object side surface that is concave at the paraxial direction and an image side surface that is concave at the paraxial direction, the sixth lens has an object side surface that is convex at the paraxial direction and an image side surface that is concave at the paraxial direction, and the seventh lens has an object side surface that is convex at the paraxial direction and an image side surface that is concave at the paraxial direction, The maximum optical radius of the object side surface of the fifth lens is SD51, the arrow height at the maximum optical radius of the object side surface of the fifth lens is SAG51, the maximum optical radius of the image side surface of the seventh lens is SD72, the arrow height at the maximum optical radius of the image side surface of the seventh lens is SAG72, the central radius of curvature at the paraxial direction of the object side surface of the fourth lens is R7, the central radius of curvature at the paraxial direction of the object side surface of the fifth lens is R9, the central radius of curvature at the paraxial direction of the image side surface of the seventh lens is R14, the vertical height from the intersection of the chief ray of a 1.0 field of view and the object side surface of the seventh lens to the optical axis is HC71, the maximum optical radius of the object side surface of the seventh lens is SD71, the intersection of the chief ray of a 1.0 field of view and the image side surface of the seventh lens is is a vertical height from the intersection point of the above-mentioned lenses to the optical axis is HC72, a maximum optical radius of the image side of the seventh lens is SD72, an axial distance between the fifth lens and the sixth lens is d10, an axial distance between the sixth lens and the seventh lens is d12, an axial thickness of the sixth lens is d11, a focal length of the first lens is f1, a focal length of the second lens is f2, a focal length of the third lens is f3, a focal length of the fourth lens is f4, a focal length of the fifth lens is f5, a focal length of the imaging optical lens is f, and a composite focal length of the first lens and the second lens is f12, the imaging optical lens satisfies the following conditional expressions (1) to (4) and (15) to (17): -8.00≦(SAG51 / SD51*R9) / (SAG72 / SD72*R14)≦-3.30 (1) 0.80≦HC71 / SD71≦0.95 (2) 0.85≦HC72 / SD72≦0.97 (3) 1.10≦(d10+d12) / d11≦2.10 (4) -0.88≦f1 / (f2-f3)≦-0.05 (15) 1.10≦f12 / f≦1.60 (16) 2.20≦f4 / R7+f5 / R9≦3.80 (17)

11. 11. The imaging optical lens according to claim 10, wherein the following conditional expression (18) is satisfied: -0.75≦f1 / (f2-f3)≦-0.06 (18)

12. 11. The imaging optical lens according to claim 10, wherein the following conditional expression (19) is satisfied: 1.28≦f12 / f≦1.36 (19)

13. 11. The imaging optical lens according to claim 10, wherein the following conditional expression (20) is satisfied: 2.70≦f4 / R7+f5 / R9≦3.20 (20)

14. 11. The imaging optical lens according to claim 10, wherein the following conditional expression (9) is satisfied: -7.10≦(SAG51 / SD51*R9) / (SAG72 / SD72*R14)≦-4.05 (9)

15. 11. The imaging optical lens according to claim 10, wherein the following conditional expression (10) is satisfied: 1.30≦(d10+d12) / d11≦1.91 (10)

16. 11. The imaging optical lens according to claim 10, wherein the following conditional expression (6) is satisfied when the focal length of the sixth lens is f6 and the focal length of the seventh lens is f7: −0.85≦f6 / f7≦−0.45 (6)

17. 17. The imaging optical lens according to claim 16, wherein the following conditional expression (11) is satisfied: −0.76≦f6 / f7≦−0.52 (11)

18. 11. The imaging optical lens according to claim 10, wherein the following conditional expression (7) is satisfied, where R1 is a central radius of curvature of the object-side surface of the first lens in a paraxial direction, R2 is a central radius of curvature of the image-side surface of the first lens in a paraxial direction, and f is a focal length of the imaging optical lens: 1.00≦(R1+R2) / f≦2.10 (7)

19. 19. The imaging optical lens according to claim 18, wherein the following conditional expression (12) is satisfied: 1.15≦(R1+R2) / f≦1.85 (12)

20. 11. The imaging optical lens according to claim 10, wherein the following conditional expression (21) is satisfied when the focal length of the sixth lens is f6: 1.65≦|f / f5|+|f / f6|≦2.69 (21)

21. 21. The imaging optical lens according to claim 20, wherein the following conditional expression (22) is satisfied: 1.96≦|f / f5|+|f / f6|≦2.28 (22)

22. The imaging optical lens according to claim 10 , wherein the first lens is made of glass.

23. 1. A lens assembly comprising: The imaging optical lens according to any one of claims 1 to 22, wherein each of the first lens to the seventh lens includes an optical section for forming an image and a structural section surrounded by a periphery of the optical section, the second lens includes a second optical section for forming an image and a second structural section surrounded by a periphery of the second optical section, the third lens includes a third optical section for forming an image and a third structural section surrounded by a periphery of the third optical section, the second structural section includes a first surface close to the image side, and the third structural section includes a second surface close to the object side. a second surface adjacent to the second optical portion, the first surface including a first inclined surface adjacent to the second optical portion and a second inclined surface provided on the side of the first inclined surface away from the second optical portion, the second surface including a third inclined surface adjacent to the third optical portion and a fourth inclined surface provided on the side of the third inclined surface away from the third optical portion, and wherein the lens assembly satisfies the following conditional expression (23) when an included angle between the first inclined surface and the optical axis is ANG1 and an included angle between the fourth inclined surface and the optical axis is ANG4. |ANG1-ANG4|≦30° (23)

24. 24. The lens assembly according to claim 23, wherein the following conditional expression (24) is satisfied when an included angle between the second inclined surface and the optical axis is ANG2 and an included angle between the third inclined surface and the optical axis is ANG3. |ANG2-ANG3|≦10° (24)

25. 24. The lens assembly according to claim 23, wherein the first inclined surface is inclined from inside to outside in a direction approaching the object side, and when a radius of curvature of a paraxial image-side surface of the second lens is R4 and a maximum optical radius of the image-side surface of the second lens is SD22, the following conditional expression (25) is satisfied: 3.00≦R4 / SD22*tan(ANG1)≦5.00 (25)

26. 25. The lens assembly according to claim 24, wherein the third inclined surface is inclined from inward to outward in a direction approaching the image side, and when a radius of curvature of the object-side surface of the third lens in a paraxial direction is R5 and a maximum optical radius of the object-side surface of the third lens is SD31, the following conditional expression (26) is satisfied: 1.50≦R5 / SD31*cos(ANG3)≦4.00 (26)

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