Optical lens

Abstract

The invention provides an optical lens which comprises a lens barrel, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and a plurality of separators, and the first lens, the second lens, the third lens and the seventh lens are accommodated in the lens barrel and are sequentially arranged from an object side to an image side. In the plurality of separators, the separator which is located between the sixth lens and the seventh lens and abuts against the image side surface of the sixth lens is a sixth separator, and the air interval between the sixth lens and the seventh lens on the optical axis of the optical lens is larger than the air interval between the optical axes of the other two adjacent lenses. The sixth lens, the seventh lens and the sixth separator meet the following conditions:-3lt; 1 / (f6 + f7) lt; 2; 1lt; r < 12 > / d < 6 > s-R < 13 > / d < 6 > mlt; 7; wherein f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, d6m is the minimum inner diameter of the image side face of the sixth isolation piece, d6s is the minimum inner diameter of the object side face of the sixth isolation piece, R12 is the curvature radius of the sixth lens, and R13 is the curvature radius of the seventh lens. According to the invention, the problem of unstable assembly of the rear lens of the optical lens in the prior art is solved.

Description

[0001] This invention is a divisional application of the invention patent with application date of June 21, 2023, application number 2023107456103, and invention name “Optical Lens”. Technical Field

[0002] The present invention relates to the technical field of optical imaging equipment, and in particular to an optical lens. Background Art

[0003] Optical lenses are key components of many electronic devices such as security surveillance cameras, mobile phones, and vehicle-mounted imaging. With the development of production technology and the improvement of material demand, it is urgent to design lenses with higher imaging quality. Generally, the imaging quality can be improved by increasing the number of lenses. However, the 7P lens can correct and compensate for each other through the combination of multiple lenses, improve the ability to gather light, and enhance the lens resolution and contrast. It can greatly improve the imaging quality without causing the optical lens to be too large.

[0004] The more lenses there are in an imaging lens, the more stringent the requirements for the spacers between the lenses are to ensure the stability of the optical lens assembly. For a seven-piece lens, the last two lenses not only balance the aberrations of the front optical system, but also support the front optical system and maintain its stability. However, during the current assembly process, the spacing between the last two lenses varies greatly, which in turn causes instability in the rear optical system and causes assembly deformation.

[0005] That is to say, the optical lens in the prior art has the problem of unstable rear lens assembly. Summary of the invention

[0006] The main purpose of the present invention is to provide an optical lens to solve the problem of unstable rear lens assembly in the prior art optical lens.

[0007] In order to achieve the above object, according to one aspect of the present invention, an optical lens is provided, comprising a lens barrel, first to seventh lenses contained in the lens barrel, and a plurality of spacers, wherein the first to seventh lenses are arranged in sequence from the object side to the image side, and the spacer located between the sixth lens and the seventh lens and partially supported by the image side surface of the sixth lens among the plurality of spacers is the sixth spacer, the air interval between the sixth lens and the seventh lens on the optical axis of the optical lens is greater than the air interval between the other two adjacent lenses on the optical axis, and the sixth lens, the seventh lens, and the sixth spacer satisfy the following conditions:

[0008] -3<1 / (f6+f7)<2;

[0009] 1<|R12 / d6s-R13 / d6m|<7;

[0010] Among them, f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, d6m is the minimum inner diameter of the image side of the sixth spacer, d6s is the minimum inner diameter of the object side of the sixth spacer, R12 is the curvature radius of the sixth lens, and R13 is the curvature radius of the seventh lens.

[0011] According to another aspect of the present invention, an optical lens is provided, comprising a lens barrel, first to seventh lenses accommodated in the lens barrel, and a plurality of spacers, wherein the first to seventh lenses are arranged in sequence from the object side to the image side, a spacer located between the fifth lens and the sixth lens and partially supported by the image side surface of the fifth lens among the plurality of spacers is a fifth spacer, a spacer located between the sixth lens and the seventh lens and partially supported by the image side surface of the sixth lens among the plurality of spacers is a sixth spacer, an air gap between the sixth lens and the seventh lens on the optical axis of the optical lens is greater than an air gap between other two adjacent lenses on the optical axis, and the sixth lens, the seventh lens, the fifth spacer, and the sixth spacer satisfy the following conditions:

[0012] 5 <R11 / (D5m-d5s)+R12 / (D6m-d6s)<15,

[0013] Among them, D5m is the maximum outer diameter of the image side of the fifth isolator, d5s is the minimum inner diameter of the object side of the fifth isolator, D6m is the maximum outer diameter of the image side of the sixth isolator, d6s is the minimum inner diameter of the object side of the sixth isolator, R11 is the radius of curvature of the object side of the sixth lens, and R12 is the radius of curvature of the image side of the sixth lens. The light emitted by the fifth lens is deflected at too large an angle, and it is easy to hit the inner surface of the fifth isolator to form stray light. By controlling the inner and outer diameters of the sixth lens, the seventh lens, and the fifth and sixth isolators, it is helpful to control the refraction angle of the sixth lens, reduce the stray light that is refracted to the surface of the fifth isolator to generate high-energy reflection, reduce the generation of stray light, and improve the imaging quality of the optical lens. For specific stray light analysis, please refer to Fig.25 and Fig.26 . Fig.26 This is the stray light simulation diagram of the optical lens when R11 / (D5m-d5s)+R12 / (D6m-d6s)>15. Fig.26 As can be seen in the figure, the optical lens has a lot of stray light. Fig.25 When R11 / (D5m-d5s)+R12 / (D6m-d6s) is in the range of 5 to 15, the stray light simulation diagram of the optical lens shows that Fig.25 Compared to Fig.26For the optical lens, the stray light is significantly reduced, which effectively improves the imaging quality of the optical lens. When R11 / (D5m-d5s)+R12 / (D6m-d6s)<5, although the stray light is less, the thickness of the isolation piece is too large, which affects the normal light passing through, thus affecting the imaging effect.

[0014] According to another aspect of the present invention, an optical lens is provided, comprising a lens barrel, first to seventh lenses accommodated in the lens barrel, and a plurality of spacers, wherein the first to seventh lenses are arranged in sequence from the object side to the image side, the spacer located between the first lens and the second lens and partially supported by the image side surface of the first lens among the plurality of spacers is the first spacer, the spacer located on the image side surface of the seventh lens among the plurality of spacers is the seventh spacer, the air interval between the sixth lens and the seventh lens on the optical axis of the optical lens is greater than the air interval between the other two adjacent lenses on the optical axis, and the optical lens satisfies:

[0015] 5 <D7s / f+d7s / R14<8;

[0016] d1s*3≤d7s;

[0017] Among them, d1s is the minimum inner diameter of the object side of the first isolation member, d7s is the minimum inner diameter of the object side of the seventh isolation member, D7s is the maximum outer diameter of the object side of the seventh isolation member, f is the effective focal length of the optical lens, and R14 is the curvature radius of the image side of the seventh lens. When d7s satisfies: d1s*3≤d7s and D7s / f+d7s / R14 is less than 5, the inner diameter of the seventh spacer is too small, which easily blocks the optically effective area of ​​the lens, thereby affecting the imaging quality of the optical lens; and when D7s / f+d7s / R14 is within the range of greater than or equal to 8 and less than or equal to 10, the matching degree between the inner and outer diameters of the seventh spacer is low, resulting in a small supporting area between the seventh spacer and the adjacent lens, and insufficient glue dispensing space between the seventh spacer and the lens barrel, which easily leads to glue overflow. Glue overflow not only affects the appearance of the optical lens, but also easily generates stray light and affects the imaging quality. When D7s / f+d7s / R14 is greater than 10, the outer diameter of the seventh spacer is too large, which is not conducive to matching with a small-sized lens barrel. By controlling the effective focal length of the sixth lens, the seventh lens, the first spacer, the seventh spacer and the optical lens within a reasonable range, the surface shape of the seventh lens and the seventh spacer are controlled, which is beneficial for reserving sufficient glue dispensing space between the seventh spacer and the barrel wall of the lens barrel, which is beneficial for fixing the lens in the lens barrel, improving the assembly stability of the optical lens, and further increasing the airtightness inside the optical lens.

[0018] In an alternative embodiment, among the plurality of spacers, the spacer located between the first lens and the second lens and abutting against the image-side portion of the first lens is the first spacer. Among the first lens, the first spacer, and the second lens, the following condition is satisfied: 5 < (R2 * R3) / (π * (D1s / 2 - d1s / 2) 2 ) < 90, where R2 is the radius of curvature of the image side of the first lens, R3 is the radius of curvature of the object side of the second lens, D1s is the maximum outer diameter of the object side of the first spacer, and d1s is the minimum inner diameter of the object side of the first spacer.

[0019] In an alternative embodiment, among the plurality of spacers, the spacer located between the second lens and the third lens and abutting against the image-side portion of the second lens is the second spacer, and the spacer located between the third lens and the fourth lens and abutting against the image-side portion of the third lens is the third spacer. Among the second spacer, the third spacer, the second lens, and the third lens, the following condition is satisfied: 6 < f3 / D3s - f2 / D2s < 11, where D2s is the maximum outer diameter of the object side of the second spacer, D3s is the maximum outer diameter of the object side of the third spacer, f2 is the effective focal length of the second lens, and f3 is the effective focal length of the third lens.

[0020] In an alternative embodiment, among the plurality of spacers, the spacer located between the fourth lens and the fifth lens and abutting against the image-side portion of the fourth lens is the fourth spacer. Among the fourth spacer, the fourth lens, and the fifth lens, the following condition is satisfied: 4 < |R8 / (D4s - d4s) - R9 / (D4m - d4m)| < 10, where d4s is the minimum inner diameter of the object side of the fourth spacer, D4s is the maximum outer diameter of the object side of the fourth spacer, d4m is the minimum inner diameter of the image side of the fourth spacer, D4m is the maximum outer diameter of the image side of the fourth spacer, R8 is the radius of curvature of the image side of the fourth lens, and R9 is the radius of curvature of the object side of the fifth lens.

[0021] In an alternative embodiment, among the plurality of spacers, the spacer located between the fifth lens and the sixth lens and abutting against the image-side portion of the fifth lens is the fifth spacer. The object sides of both the fifth lens and the sixth lens are convex surfaces, and the image sides of both the fifth lens and the sixth lens are concave surfaces. Among the fifth lens, the sixth lens, and the fifth spacer, the following condition is satisfied: 0 < f56 / (D5s - d5m) < 20, where f56 is the combined focal length of the fifth lens and the sixth lens, d5m is the minimum inner diameter of the image side of the fifth spacer, and D5s is the maximum outer diameter of the object side of the fifth spacer.

[0022] In an alternative embodiment, the following is also satisfied among the fifth lens, the sixth lens, and the fifth spacer: 0 < D5s / CT5 - D5m / CT6 < 10, where D5s is the maximum outer diameter of the object side surface of the fifth spacer, D5m is the maximum outer diameter of the image side surface of the fifth spacer, CT5 is the central thickness of the fifth lens, and CT6 is the central thickness of the sixth lens.

[0023] In an alternative embodiment, the following is satisfied among the sixth lens, the seventh lens, and the sixth spacer: 5 < R11 / (D5m - d5s) + R12 / (D6m - d6s) < 15, where D5m is the maximum outer diameter of the image side surface of the fifth spacer, d5s is the minimum inner diameter of the object side surface of the fifth spacer, D6m is the maximum outer diameter of the image side surface of the sixth spacer, d6s is the minimum inner diameter of the object side surface of the sixth spacer, R11 is the curvature radius of the object side surface of the sixth lens, and R12 is the curvature radius of the image side surface of the sixth lens.

[0024] In an alternative embodiment, among the multiple spacers, the spacer located between the first lens and the second lens and partially abutting against the image side surface of the first lens is the first spacer, and the spacer located on the image side of the seventh lens is the seventh spacer. The optical lens satisfies:

[0025] 5 < D7s / f + d7s / R14 < 8;

[0026] d1s * 3 ≤ d7s;

[0027] where d1s is the minimum inner diameter of the object side surface of the first spacer, d7s is the minimum inner diameter of the object side surface of the seventh spacer, D7s is the maximum outer diameter of the object side surface of the seventh spacer, f is the effective focal length of the optical lens, and R14 is the curvature radius of the image side surface of the seventh lens.

[0028] In an alternative embodiment, the refractive index of at least one of the first lens to the seventh lens is greater than 1.6. The optical lens satisfies: -5 < fi / (Dis - dis) / Ni < 0, where fi is the effective focal length of the i-th lens and the refractive index of the i-th lens is greater than 1.6, Dis is the maximum outer diameter of the object side surface of the i-th spacer, dis is the minimum inner diameter of the object side surface of the i-th spacer, Ni is the refractive index of the i-th lens, and the i-th spacer is located on the image side of the i-th lens and abuts against the image side surface of the i-th lens.

[0029] In an alternative embodiment, the optical lens satisfies: 2 < d0s / EPD + L / TD < 3, where d0s is the minimum inner diameter of the object side end face of the lens barrel, EPD is the entrance pupil diameter of the optical lens, L is the distance from the object side end face of the lens barrel to the image side end face of the lens barrel, and TD is the axial distance from the object side surface of the first lens to the image side surface of the seventh lens.

[0030] In an optional embodiment, the isolation member among the multiple isolation members that is located between the fourth lens and the fifth lens and is partially supported by the image side surface of the fourth lens is the fourth isolation member, and the optical lens further includes at least one fourth auxiliary isolation member, which is located on the image side of the fourth isolation member.

[0031] In an optional embodiment, the isolation member among the multiple isolation members that is located between the fifth lens and the sixth lens and is partially supported by the image side surface of the fifth lens is the fifth isolation member, and the optical lens further includes at least one fifth auxiliary isolation member, which is located on the image side of the fifth isolation member.

[0032] In an optional embodiment, the optical lens further includes at least one sixth auxiliary spacer, and the sixth auxiliary spacer is located on the image side of the sixth spacer.

[0033] According to the technical solution of the present invention, the optical lens comprises a lens barrel, first to seventh lenses accommodated in the lens barrel, and a plurality of spacers, wherein the first to seventh lenses are arranged in sequence from the object side to the image side, the spacer located between the sixth lens and the seventh lens and partially supported on the image side of the sixth lens among the plurality of spacers is the sixth spacer, the air spacing between the sixth lens and the seventh lens on the optical axis of the optical lens is greater than the air spacing between the other two adjacent lenses on the optical axis, and the sixth lens, the seventh lens, and the sixth spacer satisfy the following conditions: -3<1 / (f6+f7)<2; 1<|R12 / d6s-R13 / d6m|<7; wherein f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, d6m is the minimum inner diameter of the image side of the sixth spacer, d6s is the minimum inner diameter of the object side of the sixth spacer, R12 is the radius of curvature of the sixth lens, and R13 is the radius of curvature of the seventh lens.

[0034] When the reciprocal of the sum of the effective focal length of the sixth lens and the effective focal length of the seventh lens is within the range of -3 to 2, the object side and image side of the sixth spacer are subjected to greater stress. For specific stress conditions, please refer to Figure 1 When assembling the seventh lens, stress will be transferred to the sixth lens along with the sixth spacer, which will cause a large change in the gap between the sixth lens and the seventh lens. When the reciprocal of the sum of the effective focal length of the sixth lens and the effective focal length of the seventh lens is not in the range of -3 to 2, the above problem will not exist. By limiting the focal length, radius of curvature of the sixth lens and the seventh lens and the inner diameter of the sixth spacer, the surface shape of the sixth lens and the seventh lens and the control of the sixth spacer are achieved, the design value of the air gap between the sixth lens and the seventh lens is effectively reduced, and the stability of the air gap size between the sixth lens and the seventh lens is ensured, reducing the sensitivity of the gap change during the assembly process, and improving the optical performance and assembly stability of the optical lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0036] Figure 1 A schematic diagram of a stress distribution diagram of an optional embodiment of the present invention is shown;

[0037] Figure 2 A partial parameter schematic diagram of an optional embodiment of the present invention is shown;

[0038] Figures 3 to 5 A schematic diagram showing the structure of the optical lens of Example 1 of the present invention in the first state, the second state and the third state;

[0039] Figures 6 to 9 The axial chromatic aberration curve, the magnification chromatic aberration curve, the astigmatism curve and the distortion curve of Example 1 of the present invention are shown;

[0040] Figures 10 to 12 A schematic diagram showing the structure of the optical lens of Example 2 of the present invention in the first state, the second state and the third state;

[0041] Figures 13 to 16 The axial chromatic aberration curve, the magnification chromatic aberration curve, the astigmatism curve and the distortion curve of Example 2 of the present invention are shown;

[0042] Figures 17 to 19 A schematic diagram showing the structure of the optical lens of Example 3 of the present invention in the first state, the second state and the third state;

[0043] Figure 20 to Figure 23 The axial chromatic aberration curve, the magnification chromatic aberration curve, the astigmatism curve and the distortion curve of Example 3 of the present invention are shown;

[0044] Fig.24 A light trend diagram of an optical lens in an optional embodiment of the present invention is shown;

[0045] Fig.25 A stray light simulation diagram of an optical lens in an optional embodiment of the present invention is shown;

[0046] Fig.26 A stray light simulation diagram of an optical lens in the prior art is shown.

[0047] The above drawings include the following reference numerals:

[0048] E1, first lens; P1, first spacer; E2, second lens; P2, second spacer; E3, third lens; P3, third spacer; E4, fourth lens; P4, fourth spacer; P4b, fourth auxiliary spacer; E5, fifth lens; P5, fifth spacer; P5b, fifth auxiliary spacer; E6, sixth lens; P6, sixth spacer; P6b, sixth auxiliary spacer; E7, seventh lens; P7, seventh spacer. DETAILED DESCRIPTION

[0049] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0050] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0051] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0052] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0053] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0054] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial area. The judgment of the surface shape in the paraxial area can be based on the judgment method of ordinary knowledgeable people in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial area, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the convexity and concavity. For the object side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; for the image side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0055] In order to solve the problem of unstable rear lens assembly in the prior art optical lens, the present invention provides an optical lens.

[0056] Embodiment 1

[0057] like Figures 1 to 25 As shown, the optical lens comprises a lens barrel, first to seventh lenses contained in the lens barrel, and a plurality of spacers, wherein the first to seventh lenses are arranged in sequence from the object side to the image side, and the spacer located between the sixth lens and the seventh lens and partially supported by the image side surface of the sixth lens among the plurality of spacers is the sixth spacer, the air interval between the sixth lens and the seventh lens on the optical axis of the optical lens is greater than the air interval between the other two adjacent lenses on the optical axis, and the sixth lens, the seventh lens, and the sixth spacer satisfy the following conditions:

[0058] -3<1 / (f6+f7)<2;

[0059] 1<|R12 / d6s-R13 / d6m|<7;

[0060] Among them, f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, d6m is the minimum inner diameter of the image side of the sixth spacer, d6s is the minimum inner diameter of the object side of the sixth spacer, R12 is the curvature radius of the sixth lens, and R13 is the curvature radius of the seventh lens.

[0061] When the reciprocal of the sum of the effective focal length of the sixth lens and the effective focal length of the seventh lens is within the range of -3 to 2, the object side and image side of the sixth spacer are subjected to greater stress. For specific stress conditions, please refer to Figure 1When assembling the seventh lens, the stress will be transferred to the sixth lens along the sixth spacer, which will cause a large change in the gap between the sixth lens and the seventh lens. When the reciprocal of the sum of the effective focal length of the sixth lens and the effective focal length of the seventh lens is not in the range of -3 to 2, the above problem will not exist. By limiting the focal length, radius of curvature of the sixth lens and the seventh lens and the inner diameter of the sixth spacer, the surface shape of the sixth lens and the seventh lens and the sixth spacer can be controlled, effectively reducing the design value of the air gap between the sixth lens and the seventh lens, and ensuring the stability of the air gap size between the sixth lens and the seventh lens, reducing the sensitivity of the gap change during the assembly process, and improving the optical performance and assembly stability of the optical lens.

[0062] Preferably, -2.5<1 / (f6+f7)<1.8; 1<|R12 / d6s-R13 / d6m|<6.5.

[0063] It should be noted that the material of the sixth spacer can be an alloy material to reduce deformation during the resistance process. In this embodiment, the spacer located between the first lens and the second lens and partially supported by the image side of the first lens is the first spacer, and the relationship between the first lens, the first spacer and the second lens satisfies: 5<(R2*R3) / (π*(D1s / 2-d1s / 2) 2 )<90, where R2 is the radius of curvature of the image side of the first lens, R3 is the radius of curvature of the object side of the second lens, D1s is the maximum outer diameter of the object side of the first spacer, and d1s is the minimum inner diameter of the object side of the first spacer. By limiting the radius of curvature of the first lens and the second lens and the width of the first spacer, not only can the assembly stability be improved, but also the light blocking position of the first spacer can be stabilized, the stray light generated by the buckling position or the supporting position can be blocked, and the imaging quality of the optical lens can be improved.

[0064] Preferably, 20<(R2*R3) / (π*(D1s / 2-d1s / 2) 2 )<87.

[0065] In this embodiment, among the multiple spacers, the spacer located between the second lens and the third lens and in contact with the image-side portion of the second lens is the second spacer, and the spacer located between the third lens and the fourth lens and in contact with the image-side portion of the third lens is the third spacer. The following relationship is satisfied among the second spacer, the third spacer, the second lens, and the third lens: 6 < f3 / D3s - f2 / D2s < 11, where D2s is the maximum outer diameter of the object side of the second spacer, D3s is the maximum outer diameter of the object side of the third spacer, f2 is the effective focal length of the second lens, and f3 is the effective focal length of the third lens. By controlling f3 / D3s - f2 / D2s within a reasonable range, the second spacer can effectively absorb the stray light generated by the second lens, and make the light beam converge as much as possible for the third lens to refract the light, which is convenient for improving the stray light emerging from the third lens subsequently, thereby reducing the stray light and improving the imaging quality of the optical lens.

[0066] Preferably, 6.1 < f3 / D3s - f2 / D2s < 10.7.

[0067] In this embodiment, among the multiple spacers, the spacer located between the fourth lens and the fifth lens and in contact with the image-side portion of the fourth lens is the fourth spacer. The following relationship is satisfied among the fourth spacer, the fourth lens, and the fifth lens: 4 < |R8 / (D4s - d4s) - R9 / (D4m - d4m)| < 10, where d4s is the minimum inner diameter of the object side of the fourth spacer, D4s is the maximum outer diameter of the object side of the fourth spacer, d4m is the minimum inner diameter of the image side of the fourth spacer, D4m is the maximum outer diameter of the image side of the fourth spacer, R8 is the curvature radius of the image side of the fourth lens, and R9 is the curvature radius of the object side of the fifth lens. By controlling |R8 / (D4s - d4s) - R9 / (D4m - d4m)| within a reasonable range, it can be ensured that the fourth spacer has a reasonable contact length, which can play an effective role in supporting and transmitting stress, thereby achieving the purpose of resisting deformation, obtaining good assembly stability, and at the same time controlling the refraction angle of the lens, which is beneficial for the light to be deflected onto the second spacer to absorb the stray light, reducing the difficulty of stray light optimization, and improving the imaging quality of the optical lens.

[0068] Preferably, 4 < |R8 / (D4s - d4s) - R9 / (D4m - d4m)| < 9.5.

[0069] In this embodiment, among the multiple spacers, the spacer located between the fifth lens and the sixth lens and in contact with the image-side portion of the fifth lens is the fifth spacer. The object-side surfaces of the fifth lens and the sixth lens are both convex, and the image-side surfaces of the fifth lens and the sixth lens are both concave. The following conditions are satisfied among the fifth lens, the sixth lens, and the fifth spacer: 0 < f56 / (D5s - d5m) < 20, where f56 is the combined focal length of the fifth lens and the sixth lens, d5m is the minimum inner diameter of the image-side surface of the fifth spacer, and D5s is the maximum outer diameter of the object-side surface of the fifth spacer. By controlling f56 / (D5s - d5m) within a reasonable range, the degree of light deflection can be ensured, and at the same time, the function of stably blocking stray light can be achieved. The control of the outer diameter can further reduce the influence of the flatness at the contact position on the assembly tilt and increase the assembly stability.

[0070] Preferably, 2 < f56 / (D5s - d5m) < 19.

[0071] In this embodiment, the following condition is also satisfied among the fifth lens, the sixth lens, and the fifth spacer: 0 < D5s / CT5 - D5m / CT6 < 10, where D5s is the maximum outer diameter of the object-side surface of the fifth spacer, D5m is the maximum outer diameter of the image-side surface of the fifth spacer, CT5 is the central thickness of the fifth lens, and CT6 is the central thickness of the sixth lens. By controlling D5s / CT5 - D5m / CT6 within a reasonable range, the molding stability of the fifth lens and the sixth lens can be improved, which is beneficial to the refractive index of each position of the lens tending to be consistent and achieving the theoretical design value of the optical system as much as possible to obtain better imaging performance.

[0072] Preferably, 0 < D5s / CT5 - D5m / CT6 < 9.5.

[0073] In this embodiment, the following condition is satisfied among the sixth lens, the seventh lens, and the sixth spacer: 5 < R11 / (D5m - d5s) + R12 / (D6m - d6s) < 15, where D5m is the maximum outer diameter of the image-side surface of the fifth spacer, d5s is the minimum inner diameter of the object-side surface of the fifth spacer, D6m is the maximum outer diameter of the image-side surface of the sixth spacer, d6s is the minimum inner diameter of the object-side surface of the sixth spacer, R11 is the radius of curvature of the object-side surface of the sixth lens, and R12 is the radius of curvature of the image-side surface of the sixth lens. By controlling R11 / (D5m - d5s) + R12 / (D6m - d6s) within a reasonable range, it is convenient to control the refraction angle of the sixth lens, effectively avoid the generation of stray light with high-energy reflection caused by light refracting onto the surface of the fifth spacer, reduce the generation of stray light, and improve the imaging quality of the optical lens.

[0074] Preferably, 6 < R11 / (D5m - d5s) + R12 / (D6m - d6s) < 12.

[0075] In this embodiment, among the multiple spacers, the spacer located between the first lens and the second lens and in contact with the image-side surface portion of the first lens is the first spacer, and the spacer located on the image side of the seventh lens is the seventh spacer. The optical lens satisfies:

[0076] 5 < D7s / f + d7s / R14 < 8;

[0077] d1s * 3 ≤ d7s;

[0078] wherein, d1s is the minimum inner diameter of the object-side surface of the first spacer, d7s is the minimum inner diameter of the object-side surface of the seventh spacer, D7s is the maximum outer diameter of the object-side surface of the seventh spacer, f is the effective focal length of the optical lens, and R14 is the curvature radius of the image-side surface of the seventh lens. By controlling the above dimensions, it is beneficial to reserve sufficient space for dispensing glue between the seventh spacer and the barrel wall of the lens barrel to fix the position of the lens in the lens barrel and further increase the airtightness inside the lens.

[0079] Preferably, 5.7 < D7s / f + d7s / R14 < 7.9.

[0080] In this embodiment, the refractive index of at least one lens among the first lens to the seventh lens is greater than 1.6. The optical lens satisfies: -5 < fi / (Dis - dis) / Ni < 0, where fi is the effective focal length of the i-th lens and the refractive index of the i-th lens is greater than 1.6, Dis is the maximum outer diameter of the object-side surface of the i-th spacer, dis is the minimum inner diameter of the object-side surface of the i-th spacer, and Ni is the refractive index of the i-th lens. The i-th spacer is located on the image side of the i-th lens and in contact with the image-side surface of the i-th lens. When light passes through a lens with a refractive index greater than 1.6, large-angle refraction will occur, resulting in an increased risk of stray light. The spacer can block the stray light generated between the lenses, thereby achieving the purpose of improving the stray light. Controlling the inner diameter of the spacer to avoid too long a contact length between the spacer and the lens is beneficial to ensuring the surface flatness of the spacer and reducing the situation of assembly tilt.

[0081] Preferably, -4.5 < fi / (Dis - dis) / Ni < -0.5.

[0082] In this embodiment, the optical lens satisfies: 2 < d0s / EPD + L / TD < 3, where d0s is the minimum inner diameter of the object-side end face of the lens barrel, EPD is the entrance pupil diameter of the optical lens, L is the distance from the object-side end face of the lens barrel to the image-side end face of the lens barrel, and TD is the on-axis distance from the object-side surface of the first lens to the image-side surface of the seventh lens. Controlling the above dimensions can control the amount of light entering the optical lens, as well as the object-side size of the lens and the wall thickness of the lens barrel. A suitable object-side size is beneficial for the molding and manufacturing of the lens. In addition, the wall thickness of the lens barrel has a certain impact on the assembly stability, cost, and self-weight of the lens. When this parameter is within a reasonable range, the yield of the lens can be effectively improved, and higher economic benefits can be obtained.

[0083] Preferably, 2.3 < d0s / EPD + L / TD < 3.

[0084] In this embodiment, among the multiple spacers, the spacer located between the fourth lens and the fifth lens and partially abutting against the image-side surface of the fourth lens is the fourth spacer. The optical lens further includes at least one fourth auxiliary spacer, and the fourth auxiliary spacer is located on the image side of the fourth spacer. The fourth auxiliary spacer is used to block the light reflected by the lens or color filter after the fourth lens onto the fourth lens, and block part of the light incident from the object side onto the fifth lens, reducing the stray light generated by the optical lens and improving the imaging quality of the optical lens.

[0085] In this embodiment, among the multiple spacers, the spacer located between the fifth lens and the sixth lens and partially abutting against the image-side surface of the fifth lens is the fifth spacer. The optical lens further includes at least one fifth auxiliary spacer, and the fifth auxiliary spacer is located on the image side of the fifth spacer. The fifth auxiliary spacer is used to block the light reflected by the lens or color filter after the fifth lens onto the fifth lens, and block part of the light incident from the object side onto the sixth lens, reducing the stray light generated by the optical lens and improving the imaging quality of the optical lens.

[0086] In this embodiment, the optical lens further includes at least one sixth auxiliary spacer, and the sixth auxiliary spacer is located on the image side of the sixth spacer. The sixth auxiliary spacer is used to block the light reflected by the lens or color filter after the sixth lens onto the sixth lens, and block part of the light incident from the object side onto the seventh lens, reducing the stray light generated by the optical lens and improving the imaging quality of the optical lens.

[0087] Embodiment Two

[0088] As Figures 1 to 25As shown, the optical lens comprises a lens barrel, first to seventh lenses accommodated in the lens barrel, and a plurality of spacers, the first to seventh lenses are arranged in sequence from the object side to the image side, the spacer located between the fifth lens and the sixth lens and partially supported by the image side of the fifth lens among the plurality of spacers is the fifth spacer, the spacer located between the sixth lens and the seventh lens and partially supported by the image side of the sixth lens among the plurality of spacers is the sixth spacer, the air spacing between the sixth lens and the seventh lens on the optical axis of the optical lens is greater than the air spacing between the other two adjacent lenses on the optical axis, and the sixth lens, the seventh lens, the fifth spacer and the sixth spacer satisfy the following conditions:

[0089] 5 <R11 / (D5m-d5s)+R12 / (D6m-d6s)<15;

[0090] Among them, D5m is the maximum outer diameter of the image side surface of the fifth isolation member, d5s is the minimum inner diameter of the object side surface of the fifth isolation member, D6m is the maximum outer diameter of the image side surface of the sixth isolation member, d6s is the minimum inner diameter of the object side surface of the sixth isolation member, R11 is the curvature radius of the object side surface of the sixth lens, and R12 is the curvature radius of the image side surface of the sixth lens.

[0091] from Figure 2 and Figure 3 It can be seen that the deflection angle of the light emitted by the fifth lens is too large, and it is easy to hit the inner surface of the fifth spacer to form stray light. By controlling the inner and outer diameters of the sixth lens, the seventh lens, the fifth spacer, and the sixth spacer, it is beneficial to control the refraction angle of the sixth lens, reduce the stray light refracted to the surface of the fifth spacer to generate high-energy reflection, reduce the generation of stray light, and improve the imaging quality of the optical lens.

[0092] For detailed stray light analysis, please refer to Fig.25 and Fig.26 . Fig.26 This is the stray light simulation diagram of the optical lens when R11 / (D5m-d5s)+R12 / (D6m-d6s)>15. Fig.26 As can be seen in the figure, the optical lens has a lot of stray light. Fig.25 When R11 / (D5m-d5s)+R12 / (D6m-d6s) is in the range of 5 to 15, the stray light simulation diagram of the optical lens shows that Fig.25 Compared to Fig.26 For the optical lens, the stray light is significantly reduced, which effectively improves the imaging quality of the optical lens. When R11 / (D5m-d5s)+R12 / (D6m-d6s)<5, although the stray light is less, the thickness of the isolation piece is too large, which affects the normal light passing through, thus affecting the imaging effect.

[0093] Optionally, the sixth lens has positive optical power.

[0094] In addition, the optical lens in this embodiment also has other technical features in the first embodiment, and satisfies other parameter relationships in the first embodiment, which are not listed here one by one.

[0095] Embodiment 3

[0096] like Figures 1 to 25 As shown, the optical lens comprises a lens barrel, first to seventh lenses accommodated in the lens barrel, and a plurality of spacers, the first to seventh lenses are arranged in sequence from the object side to the image side, the spacer located between the first lens and the second lens and partially supported by the image side surface of the first lens among the plurality of spacers is the first spacer, the spacer located on the image side surface of the seventh lens among the plurality of spacers is the seventh spacer, the air interval between the sixth lens and the seventh lens on the optical axis of the optical lens is greater than the air interval between the other two adjacent lenses on the optical axis, and the optical lens satisfies:

[0097] 5 <D7s / f+d7s / R14<8;

[0098] d1s*3≤d7s;

[0099] Among them, d1s is the minimum inner diameter of the object side of the first isolation member, d7s is the minimum inner diameter of the object side of the seventh isolation member, D7s is the maximum outer diameter of the object side of the seventh isolation member, f is the effective focal length of the optical lens, and R14 is the curvature radius of the image side of the seventh lens.

[0100] When d7s satisfies: d1s*3≤d7s, when D7s / f+d7s / R14 is less than 5, the inner diameter of the seventh spacer is too small, which easily blocks the optically effective area of ​​the lens, thereby affecting the imaging quality of the optical lens; and when D7s / f+d7s / R14 is within the range of greater than or equal to 8 and less than or equal to 10, the matching degree between the inner and outer diameters of the seventh spacer is low, resulting in a small supporting area between the seventh spacer and the adjacent lens, and insufficient glue dispensing space between the seventh spacer and the lens barrel, which easily leads to glue overflow. Glue overflow not only affects the appearance of the optical lens, but also easily generates stray light and affects the imaging quality; when D7s / f+d7s / R14 is greater than 10, the outer diameter of the seventh spacer is too large, which is not conducive to matching with a small-sized lens barrel.

[0101] By controlling the effective focal length of the sixth lens, the seventh lens, the first spacer, the seventh spacer and the optical lens within a reasonable range, the surface shape of the seventh lens and the seventh spacer are controlled, which is beneficial for reserving sufficient glue dispensing space between the seventh spacer and the barrel wall of the lens barrel, which is beneficial for fixing the lens in the lens barrel, improving the assembly stability of the optical lens, and further increasing the airtightness inside the optical lens.

[0102] Optionally, the optical lens may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0103] The optical lens in the present application may use multiple lenses, such as the seven lenses mentioned above. By reasonably allocating the effective focal length, surface shape, center thickness of each lens, axial distance between lenses, inner diameter, outer diameter, etc. of each spacer, the image quality of the optical lens can be effectively increased, the sensitivity of the lens can be reduced, and the processability of the lens can be improved, making the optical lens more conducive to production and processing and applicable to portable electronic devices such as smart phones.

[0104] In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After using an aspherical lens, the aberration occurring during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0105] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical lens can be changed to obtain the various results and advantages described in this specification. For example, although seven lenses are described as an example in the embodiment, the optical lens is not limited to including seven lenses. If necessary, the optical lens may also include other numbers of lenses.

[0106] Figure 2 A schematic structural diagram of an optical lens of the present application is shown. Figure 2 Parameters such as d0s and d1s are also indicated in the figure to clearly and intuitively understand the meaning of the parameters. In order to facilitate the display of the optical lens structure and the specific surface shape, these parameters will no longer be reflected in the drawings when describing specific examples later.

[0107] Wherein, Dis refers to the maximum outer diameter of the object side of the i-th spacer, dis refers to the minimum inner diameter of the object side of the i-th spacer, Dim refers to the maximum outer diameter of the image side of the i-th spacer, dim refers to the minimum inner diameter of the image side of the i-th spacer, where i is selected from 1, 2, 3, 4, 5, 6, and 7. d0s is the minimum inner diameter of the object side of the lens barrel, and d0m is the minimum inner diameter of the image side of the lens barrel.

[0108] The following further describes examples of specific surface shapes and parameters of the optical lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0109] It should be noted that in the following example, there are the first state, the second state and the third state, and in the same example, the parameters such as the radius of curvature, the center thickness and the spacing distance between the first lens to the seventh lens of the optical lens in the first state, the second state and the third state, and the high-order image coefficient are the same, but the parameters such as the lens barrel P0, the thickness of the spacer, the inner diameter of the spacer, the outer diameter of the spacer and the distance between the spacers are different, and the shapes of some lenses are different. In other words, the main structure for imaging is the same, but the auxiliary structure for imaging is different.

[0110] exist Figure 3 , S1 is the object-side surface of the first lens, S2 is the image-side surface of the first lens, S3 is the object-side surface of the second lens, S4 is the image-side surface of the second lens, S5 is the object-side surface of the third lens, S6 is the image-side surface of the third lens, S7 is the object-side surface of the fourth lens, S8 is the image-side surface of the fourth lens, S9 is the object-side surface of the fifth lens, S10 is the image-side surface of the fifth lens, S11 is the object-side surface of the sixth lens, S12 is the image-side surface of the sixth lens, S13 is the object-side surface of the seventh lens, and S14 is the image-side surface of the seventh lens.

[0111] It should be noted that any one of the following examples 1 to 3 is applicable to all embodiments of the present application.

[0112] Example 1

[0113] like Figures 3 to 9 As shown, the optical lens of Example 1 of the present application is described. Figure 3 FIG. 1 shows a schematic diagram of the structure of the optical lens of Example 1 in the first state. Figure 4 FIG. 1 shows a schematic diagram of the structure of the optical lens of Example 1 in the second state. Figure 5 A schematic structural diagram of the optical lens of Example 1 in the third state is shown.

[0114] like Figure 3 As shown, the optical lens includes, from the object side to the image side, a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fourth auxiliary spacer P4b, a fifth lens E5, a fifth spacer P5, a sixth lens E6, a sixth spacer P6, a sixth auxiliary spacer P6b, a seventh lens E7, and a seventh spacer P7.

[0115] exist Figure 4 The second state shown in Figure 3 The first state shown is similar except that the dimensions of the spacers are slightly different.

[0116] exist Figure 5 The third state shown in Figure 3 Compared to the first state shown, Figure 5 There is no fourth auxiliary spacer P4b, and the sizes of the remaining spacers are slightly different.

[0117] Table 1 shows the basic structural parameters of the optical lens of Example 1, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0118]

[0119]

[0120] Table 1

[0121] In Example 1, the object-side surface and the image-side surface of some lenses among the first lens E1 to the seventh lens E7 are aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0122]

[0123] Among them, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R, that is, the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above; k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below gives the cone coefficients and high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for each aspheric mirror surface S1-S14 in Example 1.

[0124]

[0125]

[0126] Table 2

[0127] Figure 6 The axial chromatic aberration curve of the optical lens of Example 1 is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the optical lens. Figure 7 The chromatic aberration curve of the optical lens of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical lens. Figure 8 The astigmatism curve of the optical lens of Example 1 is shown, which indicates the meridional image curvature and the sagittal image curvature. Fig. 9 The distortion curve of the optical lens of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different field angles.

[0128] according to Figures 6 to 9 It can be seen that the optical lens given in Example 1 can achieve good imaging quality.

[0129] Example 2

[0130] like Figures 10 to 16 As shown, the optical lens of Example 2 of the present application is described. Fig.10 The structure diagram of the optical lens of Example 2 in the first state is shown. Fig.11 FIG. 1 shows a schematic diagram of the structure of the optical lens of Example 2 in the second state. Fig.12 A schematic structural diagram of the optical lens of Example 2 in the third state is shown.

[0131] like Fig.10 As shown, the optical lens includes, from the object side to the image side, a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, a fifth auxiliary spacer P5b, a sixth lens E6, a sixth spacer P6, a sixth auxiliary spacer P6b, a seventh lens E7, and a seventh spacer P7.

[0132] exist Fig.11 The second state shown in Fig.10 The first state shown is similar except that the dimensions of the spacers are slightly different.

[0133] exist Fig.12 The third state shown in Fig.10 The first state shown is similar except that the dimensions of the spacers are slightly different.

[0134] Table 3 shows the basic structural parameters of the optical lens of Example 2, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0135]

[0136]

[0137] Table 3

[0138] Table 4 gives the cone coefficients and higher-order coefficients that can be used for each aspherical mirror surface S1-S14 in Example 2.

[0139] Face number A4 A6 A8 A10 A12 A14 A16 S1 -5.8381E-04 9.7851E-03 -4.8413E-02 1.5042E-01 -3.1488E-01 4.5962E-01 -4.7882E-01 S2 -2.5164E-03 -1.0430E-02 7.0822E-02 -2.3344E-01 4.9771E-01 -7.3188E-01 7.6581E-01 S3 -1.2559E-02 1.6813E-02 -5.3323E-02 1.5820E-01 -3.1556E-01 4.3456E-01 -4.2286E-01 S4 -7.2458E-03 -4.2872E-03 5.5757E-02 -2.1558E-01 5.3306E-01 -8.9962E-01 1.0728E+00 S5 5.1550E-04 2.9283E-03 -1.7898E-02 5.0833E-02 -7.9409E-02 4.6617E-02 5.9551E-02 S6 -3.3826E-04 -3.0341E-02 1.6709E-01 -5.9047E-01 1.3925E+00 -2.2963E+00 2.7161E+00 S7 -2.7781E-02 -1.1494E-03 -7.9220E-03 -1.9748E-03 8.8832E-02 -2.8862E-01 5.0158E-01 S8 -2.2287E-02 -4.3191E-03 2.0248E-02 -4.5469E-02 6.4671E-02 -6.3957E-02 4.5539E-02 S9 -2.0217E-02 8.4774E-03 2.2757E-03 -1.0108E-02 1.1368E-02 -7.8614E-03 3.7410E-03 S10 -4.5147E-02 1.1859E-02 3.9675E-03 -1.0251E-02 8.9869E-03 -4.8321E-03 1.7588E-03 S11 -2.4328E-02 7.0264E-03 -2.9509E-03 8.2104E-04 -1.8010E-04 3.4418E-05 -5.3805E-06 S12 2.7693E-03 1.1984E-03 -1.3972E-03 3.1804E-04 -2.8743E-05 -1.7130E-06 1.0911E-06 S13 -8.4305E-02 1.0000E-02 3.6740E-03 -2.3584E-03 6.3239E-04 -1.0236E-04 1.1015E-05 S14 -9.3661E-02 2.4948E-02 -5.8913E-03 1.3242E-03 -2.6980E-04 4.3228E-05 -5.0492E-06 Face number A18 A20 A22 A24 A26 A28 A30 S1 3.6039E-01 -1.9630E-01 7.6602E-02 -2.0863E-02 3.7637E-03 -4.0394E-04 1.9515E-05 S2 -5.7901E-01 3.1733E-01 -1.2488E-01 3.4396E-02 -6.2949E-03 6.8762E-04 -3.3927E-05 S3 2.9464E-01 -1.4734E-01 5.2346E-02 -1.2867E-02 2.0737E-03 -1.9623E-04 8.2078E-06 S4 -9.1973E-01 5.6928E-01 -2.5230E-01 7.8126E-02 -1.6064E-02 1.9721E-03 -1.0947E-04 S5 -1.5774E-01 1.6766E-01 -1.0660E-01 4.3212E-02 -1.0977E-02 1.5971E-03 -1.0170E-04 S6 -2.3333E+00 1.4574E+00 -6.5473E-01 2.0596E-01 -4.3036E-02 5.3626E-03 -3.0146E-04 S7 -5.5813E-01 4.2121E-01 -2.1894E-01 7.7429E-02 -1.7830E-02 2.4143E-03 -1.4601E-04 S8 -2.3626E-02 8.9322E-03 -2.4322E-03 4.6403E-04 -5.8785E-05 4.4347E-06 -1.5052E-07 S9 -1.2595E-03 3.0162E-04 -5.0976E-05 5.9369E-06 -4.5303E-07 2.0368E-08 -4.0862E-10 S10 -4.4787E-04 8.0635E-05 -1.0216E-05 8.9056E-07 -5.0804E-08 1.7051E-09 -2.5474E-11 S11 6.1659E-07 -4.7612E-08 2.2671E-09 -5.3402E-11 -1.4244E-13 3.6492E-14 -5.7476E-16 S12 -2.1544E-07 2.6360E-08 -2.1257E-09 1.1234E-10 -3.7397E-12 7.1137E-14 -5.8989E-16 S13 -8.2210E-07 4.3287E-08 -1.6053E-09 4.1052E-11 -6.8878E-13 6.8158E-15 -3.0076E-17 S14 4.2163E-07 -2.5056E-08 1.0499E-09 -3.0302E-11 5.7301E-13 -6.3896E-15 3.1842E-17

[0140] Table 4

[0141] Fig.13 The axial chromatic aberration curve of the optical lens of Example 2 is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the optical lens. Fig.14 The magnification chromatic aberration curve of the optical lens of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical lens. Fig.15The astigmatism curve of the optical lens of Example 2 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.16 The distortion curve of the optical lens of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different field angles.

[0142] according to Figures 13 to 16 It can be seen that the optical lens provided in Example 2 can achieve good imaging quality.

[0143] Example 3

[0144] like Figures 17 to 23 As shown, the optical lens of Example 3 of the present application is described. Fig.17 FIG. 1 shows a schematic diagram of the structure of the optical lens of Example 3 in the first state. Fig.18 FIG. 4 shows a schematic diagram of the structure of the optical lens of Example 3 in the second state. Fig.19 A schematic structural diagram of the optical lens of Example 3 in the third state is shown.

[0145] like Fig.17 As shown, the optical lens includes, from the object side to the image side, a first lens E1, a first spacer P1, a second lens E2, a second spacer P2, a third lens E3, a third spacer P3, a fourth lens E4, a fourth spacer P4, a fifth lens E5, a fifth spacer P5, a fifth auxiliary spacer P5b, a sixth lens E6, a sixth spacer P6, a sixth auxiliary spacer P6b, a seventh lens E7, and a seventh spacer P7.

[0146] exist Fig.18 The second state shown in Fig.17 The first state shown is similar except that the dimensions of the spacers are slightly different.

[0147] exist Fig.19 The third state shown in Fig.17 The first state shown is similar except that the dimensions of the spacers are slightly different.

[0148] Table 5 shows the basic structural parameter table of the optical lens of Example 3, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0149]

[0150]

[0151] Table 5

[0152] Table 6 gives the cone coefficients and higher-order coefficients that can be used for each aspherical mirror surface S1-S14 in Example 3.

[0153] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.6542E-03 1.2913E-01 -7.6666E-01 2.9095E+00 -7.4506E+00 1.3420E+01 -1.7415E+01 S2 -1.3732E-02 6.3253E-02 -5.5003E-01 2.9981E+00 -1.0600E+01 2.5518E+01 -4.3173E+01 S3 -2.5646E-02 6.0977E-02 -4.0730E-01 2.2353E+00 -8.0761E+00 1.9962E+01 -3.4802E+01 S4 -1.5552E-02 2.4248E-02 -2.6873E-01 2.4291E+00 -1.2128E+01 3.8088E+01 -8.0405E+01 S5 -2.5139E-02 1.7647E-01 -1.4098E+00 7.0005E+00 -2.3499E+01 5.5326E+01 -9.3524E+01 S6 -3.3680E-02 9.7017E-02 -4.8442E-01 1.8172E+00 -5.1170E+00 1.0817E+01 -1.7200E+01 S7 -1.1063E-01 2.7248E-01 -1.8023E+00 8.1898E+00 -2.5547E+01 5.6091E+01 -8.8477E+01 S8 -7.4541E-02 5.3041E-02 -1.3852E-01 3.4350E-01 -6.6221E-01 9.3259E-01 -9.4859E-01 S9 -9.5218E-02 1.4219E-01 -2.5727E-01 4.1675E-01 -5.4036E-01 5.3217E-01 -3.9223E-01 S10 -1.7811E-01 1.3160E-01 -1.1633E-01 1.0371E-01 -7.2235E-02 3.6032E-02 -1.2705E-02 S11 -8.4815E-03 2.8425E-02 -5.6195E-02 4.8175E-02 -2.5533E-02 9.1008E-03 -2.2704E-03 S12 8.9040E-02 -1.9426E-02 -4.1252E-02 4.4757E-02 -2.4425E-02 8.6475E-03 -2.1333E-03 S13 -1.3128E-01 6.8527E-02 -2.5028E-02 7.6095E-03 -1.8223E-03 3.2523E-04 -4.2579E-05 S14 -7.4006E-02 3.3681E-02 -1.2230E-02 3.8299E-03 -1.0141E-03 2.0922E-04 -3.1830E-05 Face number A18 A20 A22 A24 A26 A28 A30 S1 1.6468E+01 -1.1353E+01 5.6425E+00 -1.9679E+00 4.5677E-01 -6.3340E-02 3.9688E-03 S2 5.2231E+01 -4.5404E+01 2.8132E+01 -1.2121E+01 3.4502E+00 -5.8314E-01 4.4302E-02 S3 4.3483E+01 -3.9071E+01 2.5017E+01 -1.1127E+01 3.2643E+00 -5.6744E-01 4.4234E-02 S4 1.1796E+02 -1.2191E+02 8.8530E+01 -4.4245E+01 1.4497E+01 -2.8046E+00 2.4295E-01 S5 1.1483E+02 -1.0247E+02 6.5734E+01 -2.9518E+01 8.8028E+00 -1.5657E+00 1.2567E-01 S6 2.0508E+01 -1.8164E+01 1.1735E+01 -5.3575E+00 1.6339E+00 -2.9817E-01 2.4590E-02 S7 1.0135E+02 -8.4355E+01 5.0473E+01 -2.1142E+01 5.8823E+00 -9.7630E-01 7.3131E-02 S8 6.9510E-01 -3.6463E-01 1.3474E-01 -3.3959E-02 5.4933E-03 -5.0518E-04 1.9484E-05 S9 2.1475E-01 -8.6511E-02 2.5207E-02 -5.1513E-03 6.9852E-04 -5.6304E-05 2.0370E-06 S10 3.1442E-03 -5.2969E-04 5.4013E-05 -1.4674E-06 -4.2117E-07 5.8334E-08 -2.5216E-09 S11 4.0499E-04 -5.1977E-05 4.7593E-06 -3.0289E-07 1.2703E-08 -3.1474E-10 3.4782E-12 S12 3.7715E-04 -4.8152E-05 4.4051E-06 -2.8156E-07 1.1934E-08 -3.0118E-10 3.4235E-12 S13 4.0905E-06 -2.8814E-07 1.4735E-08 -5.3323E-10 1.2964E-11 -1.9015E-13 1.2726E-15 S14 3.4991E-06 -2.7579E-07 1.5411E-08 -5.9583E-10 1.5156E-11 -2.2823E-13 1.5415E-15

[0154] Table 6

[0155] Fig. 20 The axial chromatic aberration curve of the optical lens of Example 3 is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the optical lens. Fig.21 The magnification chromatic aberration curve of the optical lens of Example 3 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the optical lens. Fig. 22 The astigmatism curve of the optical lens of Example 3 is shown, which represents the meridional image curvature and the sagittal image curvature. Fig.23 The distortion curve of the optical lens of Example 3 is shown, which represents the distortion magnitude values ​​corresponding to different field angles.

[0156] according to Figure 20 to Figure 23 It can be seen that the optical lens given in Example 3 can achieve good imaging quality.

[0157] In summary, Examples 1 to 3 satisfy the relationships shown in Table 7 respectively.

[0158] Conditional / Example 1-1 1-2 1-3 2-1 2-2 2-3 3-1 3-2 3-3 (R2*R3) / (π*(D1s / 2-d1s / 2)2) 49.20 48.62 48.04 26.15 26.15 6.29 85.61 85.61 85.61 f2 / (D2s-d2s) / N2 -0.86 -0.86 -0.86 -0.83 -0.83 -0.73 -0.86 -0.86 -0.76 f4 / (D4s-d4s) / N4 -4.29 -4.12 -3.88 -1.08 -1.11 -1.11 -1.47 -1.48 -1.47 d0s / EPD+L / TD 2.59 2.59 2.59 2.67 2.67 2.67 2.96 2.96 2.96 f3 / D3s-f2 / D2s 10.27 10.45 10.45 8.63 9.04 9.07 6.82 6.87 6.24 |R8 / (D4s-d4s)-R9 / (D4m-d4m)| 4.22 4.49 4.04 9.02 9.02 9.02 7.21 7.21 7.21 f56 / (D5s-d5m) 3.30 2.45 2.37 18.57 10.26 8.96 3.70 2.79 3.82 D5s / CT5-D5m / CT6 8.42 9.03 9.11 0.49 0.10 0.57 2.90 3.02 2.80 R11 / (D5m-d5s)+R12 / (D6m-d6s) 8.24 10.18 10.45 8.73 8.54 9.40 7.61 7.80 7.51 D7s / f+d7s / R14 5.12 5.11 5.11 7.89 7.65 7.89 6.15 6.15 6.15 1 / (f6+f7) 1.66 1.66 1.66 1.06 1.06 1.06 -2.17 -2.17 -2.17 R12 / d6s-R13 / d6m 2.38 2.32 2.32 1.20 1.17 1.15 6.15 5.9 6.17

[0159] Table 7

[0160] Table 8 gives some parameters of the optical lenses of Examples 1 to 3.

[0161] Parameters / Examples 1-1 1-2 1-3 2-1 2-2 2-3 3-1 3-2 3-3 d1s 2.99 2.99 2.99 3.32 3.32 3.32 2.56 2.56 2.56 D1s 4.65 4.66 4.67 4.88 4.88 6.5 4.2 4.2 4.2 d2s 2.86 2.86 2.86 3.16 3.16 3.16 2.54 2.54 2.54 D2s 4.72 4.72 4.72 6.6 6.6 6.6 4.3 4.3 5.41 D3s 6.1 5.95 5.95 5.13 4.81 4.79 2.71 2.72 2.72 d4s 5.14 5.63 5.66 4.33 4.33 4.33 4.41 4.35 4.4 d4m 6.95 6.95 5.66 4.33 4.33 4.33 3.36 3.36 3.36 D4s 8.46 9.21 10.16 6.82 6.82 6.82 3.36 3.36 3.36 D4m 8.77 9.48 10.16 6.82 6.82 6.82 6.62 6.62 6.62 d5s 7.51 7.46 7.46 7.69 6.66 6.6 6.62 6.62 6.62 d5m 7.51 7.46 7.46 8.53 8.28 8.53 5.47 5.49 5.43 D5s 9.7 10.4 10.5 8.95 9.04 9.4 6.84 6.84 6.84 D5m 9.7 10.4 10.5 9.3 9.71 9.73 8.53 9.08 8.48 d6s 8.89 9.26 9.26 9.1 9.3 9.39 8.68 9.28 8.68 d6m 9.81 9.81 9.81 10.05 10.04 10.04 7.44 7.66 7.41 D6m 10.64 10.6 10.56 11.31 11.27 11.15 8.8 8.94 8.8 d7s 10.33 10.43 10.43 11.29 10.89 11.29 8.62 9.53 8.92 D7s 11.24 10.98 10.98 11.84 11.7 11.84 9.8 9.93 9.8 d0s 5.02 5.02 5.02 5.4 5.4 5.4 9.62 9.62 9.62 L 6.38 6.38 6.38 7.4 7.4 7.4 9.94 9.94 9.94

[0162] Table 8

[0163] It should be noted that 1-1 in Table 7 and Table 8 represents the first state of the optical lens in Example 1, 1-2 represents the second state of the optical lens in Example 1, and 1-3 represents the third state of the optical lens in Example 1. 2-1 represents the first state of the optical lens in Example 2, 2-2 represents the second state of the optical lens in Example 2, 2-3 represents the third state of the optical lens in Example 2, 3-1 represents the first state of the optical lens in Example 3, 3-2 represents the second state of the optical lens in Example 3, and 3-3 represents the third state of the optical lens in Example 3.

[0164] Table 9 gives the effective focal lengths of the first lens, the second optical element and the third lens of the optical lenses of Examples 1 to 3.

[0165] Example parameters 1 2 3 f(mm) 6.11 6.40 5.36 f1(mm) 5.75 6.58 5.07 f2(mm) -13.42 -15.87 -12.14 f3(mm) 45.28 31.94 17.60 f4(mm) -101.17 -21.52 -26.96 f5(mm) -16.90 344.33 -7.66 f6(mm) 4.96 7.92 3.49 f7(mm) -4.36 -6.98 -3.95 EPD(mm) 3.19 3.37 2.75 Semi-FOV(°) 43.52 43.04 43.12

[0166] Table 9

[0167] The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical lens described above.

[0168] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0169] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0170] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0171] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical lens, characterized in that: It includes a lens barrel, a first lens to a seventh lens accommodated in the lens barrel, and a plurality of spacers. The first lens to the seventh lens are arranged in sequence from the object side to the image side. Among the plurality of spacers, the spacer located between the first lens and the second lens and abutting against a part of the image side surface of the first lens is the first spacer. Among the plurality of spacers, the spacer located on the image side of the seventh lens is the seventh spacer. The air gap between the sixth lens and the seventh lens on the optical axis of the optical lens is greater than the air gaps between other adjacent two lenses on the optical axis. The optical lens satisfies: 5 < D7s / f + d7s / R14 < 8; d1s * 3 ≤ d7s; Wherein, d1s is the minimum inner diameter of the object side surface of the first spacer, d7s is the minimum inner diameter of the object side surface of the seventh spacer, D7s is the maximum outer diameter of the object side surface of the seventh spacer, f is the effective focal length of the optical lens, and R14 is the curvature radius of the image side surface of the seventh lens.

2. The optical lens according to claim 1, characterized in that: The first lens, the first spacer and the second lens satisfy the following conditions: 5<(R2*R3) / (π*(D1s / 2-d1s / 2) 2 )<90, wherein R2 is the curvature radius of the image side surface of the first lens, R3 is the curvature radius of the object side surface of the second lens, D1s is the maximum outer diameter of the object side surface of the first isolation member, and d1s is the minimum inner diameter of the object side surface of the first isolation member.

3. The optical lens according to claim 1, characterized in that: Among the plurality of spacers, the spacer located between the second lens and the third lens and abutting against a part of the image side surface of the second lens is the second spacer. Among the plurality of spacers, the spacer located between the third lens and the fourth lens and abutting against a part of the image side surface of the third lens is the third spacer. The following is satisfied among the second spacer, the third spacer, the second lens, and the third lens: 6 < f3 / D3s - f2 / D2s < 11, where D2s is the maximum outer diameter of the object side surface of the second spacer, D3s is the maximum outer diameter of the object side surface of the third spacer, f2 is the effective focal length of the second lens, and f3 is the effective focal length of the third lens.

4. The optical lens according to claim 1, characterized in that: Among the plurality of spacers, the spacer located between the fourth lens and the fifth lens and abutting against a part of the image side surface of the fourth lens is the fourth spacer. The following is satisfied among the fourth spacer, the fourth lens, and the fifth lens: 4 < |R8 / (D4s - d4s) - R9 / (D4m - d4m)| < 10, where d4s is the minimum inner diameter of the object side surface of the fourth spacer, D4s is the maximum outer diameter of the object side surface of the fourth spacer, d4m is the minimum inner diameter of the image side surface of the fourth spacer, D4m is the maximum outer diameter of the image side surface of the fourth spacer, R8 is the curvature radius of the image side surface of the fourth lens, and R9 is the curvature radius of the object side surface of the fifth lens.

5. The optical lens according to claim 1, characterized in that: Among the multiple spacers, the spacer located between the fifth lens and the sixth lens and in contact with the image-side portion of the fifth lens is the fifth spacer. The object-side surfaces of the fifth lens and the sixth lens are both convex, and the image-side surfaces of the fifth lens and the sixth lens are both concave. The following relationship is satisfied among the fifth lens, the sixth lens, and the fifth spacer: 0 < f56 / (D5s - d5m) < 20, where f56 is the combined focal length of the fifth lens and the sixth lens, d5m is the minimum inner diameter of the image-side surface of the fifth spacer, and D5s is the maximum outer diameter of the object-side surface of the fifth spacer.

6. The optical lens according to claim 5, characterized in that: The following relationship is also satisfied among the fifth lens, the sixth lens, and the fifth spacer: 0 < D5s / CT5 - D5m / CT6 < 10, where D5s is the maximum outer diameter of the object-side surface of the fifth spacer, D5m is the maximum outer diameter of the image-side surface of the fifth spacer, CT5 is the central thickness of the fifth lens, and CT6 is the central thickness of the sixth lens.

7. The optical lens according to any one of claims 1 to 6, characterized in that: The refractive index of at least one of the first lens to the seventh lens is greater than 1.

6. The optical lens satisfies: -5 < fi / (Dis - dis) / Ni < 0, where fi is the effective focal length of the i-th lens and the refractive index of the i-th lens is greater than 1.6, Dis is the maximum outer diameter of the object-side surface of the i-th spacer, dis is the minimum inner diameter of the object-side surface of the i-th spacer, Ni is the refractive index of the i-th lens, and the i-th spacer is located on the image side of the i-th lens and in contact with the image-side surface of the i-th lens.

8. The optical lens according to any one of claims 1 to 6, characterized in that: The optical lens satisfies: 2 < d0s / EPD + L / TD < 3, where d0s is the minimum inner diameter of the object-side end face of the lens barrel, EPD is the entrance pupil diameter of the optical lens, L is the distance from the object-side end face of the lens barrel to the image-side end face of the lens barrel, and TD is the axial distance from the object-side surface of the first lens to the image-side surface of the seventh lens.

9. The optical lens according to any one of claims 1 to 6, characterized in that: Among the multiple spacers, the spacer located between the fourth lens and the fifth lens and in contact with the image-side portion of the fourth lens is the fourth spacer. The optical lens further includes at least one fourth auxiliary spacer, and the fourth auxiliary spacer is located on the image side of the fourth spacer.

10. The optical lens according to any one of claims 1 to 6, characterized in that Among the multiple spacers, the spacer located between the fifth lens and the sixth lens and in contact with the image-side portion of the fifth lens is the fifth spacer. The optical lens further includes at least one fifth auxiliary spacer, and the fifth auxiliary spacer is located on the image side of the fifth spacer; and / or Among the multiple spacers, the spacer located between the sixth lens and the seventh lens and in contact with the image-side portion of the sixth lens is the sixth spacer. The optical lens further includes at least one sixth auxiliary spacer, and the sixth auxiliary spacer is located on the image side of the sixth spacer.

Images