Optical lens system

Abstract

The present application provides an optical lens system, comprising: five lenses, the five lenses comprising a first lens to a fifth lens in sequence from an object side to an image side; a plurality of spacers, the plurality of spacers comprising a fourth spacer located on the image side of the fourth lens and in contact with the image side surface of the fourth lens; a lens barrel for accommodating the lenses and the spacers; the Abbe number V4 of the fourth lens and the Abbe number V5 of the fifth lens satisfy: -40 < V4-V5 < -30; the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d4s of the object side surface of the fourth spacer, the outer diameter D4m of the image side surface of the fourth spacer satisfy: -1 < (d4s*D4m) / (f4-f5) < 3; the curvature radius R7 of the object side surface of the fourth lens, the curvature radius R8 of the image side surface of the fourth lens, the thickness CP4 of the fourth spacer, the air gap T45 of the fourth lens and the fifth lens on the optical axis, the central thickness CT5 of the fifth lens satisfy: -40 < (R7+R8) / (CP4+T45+CT5) < -18. The present application solves the problem that the rear-end system of the optical lens system in the prior art is prone to stray light.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging devices, and more particularly, to an optical lens system. Background Art

[0002] In recent years, with the iterative development of smart phones, the configuration of the optical lens system on mobile phones has continuously become a sharp weapon for differentiating competition among major smart phone brands. For a five-piece optical lens system, light directly enters the imaging surface after passing through the last lens. However, there are many reflected light rays inside the lens and on the lens surface, which easily causes a large number of non-imaging light rays to enter the imaging surface, greatly reducing the imaging quality. Therefore, the rear lens and the spacer that abuts against it play an important role in intercepting stray light. Therefore, how to design the effective focal length of the rear lens and the inner and outer diameters of the spacer to improve stray light is an urgent problem to be solved. Summary of the Invention

[0003] The main object of the present invention is to provide an optical lens system to solve the problem of easy generation of stray light in the rear-end system of the optical lens system in the prior art.

[0004] To achieve the above object, according to one aspect of the present invention, there is provided an optical lens system, including: five lenses, the five lenses sequentially include a first lens to a fifth lens from the object side to the image side of the optical lens system; a plurality of spacers, at least including a fourth spacer located on the image side of the fourth lens and in contact with the image side surface of the fourth lens; a lens barrel for accommodating the lenses and the spacers; wherein, the Abbe number V4 of the fourth lens and the Abbe number V5 of the fifth lens satisfy: -40 < V4 - V5 < -30; the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d4s of the object side surface of the fourth spacer, and the outer diameter D4m of the image side surface of the fourth spacer satisfy: -1 < (d4s * D4m) / (f4 - f5) < 3; the curvature radius R7 of the object side surface of the fourth lens, the curvature radius R8 of the image side surface of the fourth lens, the thickness CP4 of the fourth spacer, the air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical lens system, and the central thickness CT5 of the fifth lens satisfy: -40 < (R7 + R8) / (CP4 + T45 + CT5) < -18.

[0005] According to another aspect of the present invention, an optical lens system is provided, comprising: five lenses, the five lenses being sequentially arranged from the object side to the image side of the optical lens system, including a first lens to a fifth lens; a plurality of spacers, the plurality of spacers including at least a fourth spacer located on the image side of a fourth lens and in contact with the image side surface of the fourth lens; a lens barrel for accommodating the lenses and the spacers; wherein the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d4s of the object side surface of the fourth spacer, and the outer diameter D4m of the image side surface of the fourth spacer satisfy the following: -1 < (d4s * D4m) / (f4 - f5) < 3; the effective focal length f4 of the fourth lens, the inner diameter d4m of the image side surface of the fourth spacer, the refractive index N4 of the fourth lens, and the refractive index N5 of the fifth lens satisfy the following: 2 < |f4 / d4m| * (N4 + N5) < 18. This application provides a five-element optical lens system. Since the rear lenses, especially the fourth and fifth lenses, are close to the imaging plane, the light emitted through the fifth lens directly affects the image quality. By controlling the effective focal length, refractive index, and inner and outer diameters of the fourth isolator, it is beneficial to reduce the sensitivity of the fourth and fifth lenses, reduce stray light reflected from the lenses, and at the same time help ensure that the inner diameter of the image side of the fourth isolator is close to the optical outer diameter of the object side of the fifth lens. The fourth isolator effectively blocks poorly imaging light, reduces the transmission of some non-imaging light caused by penetrating light between the lenses, improves the light blocking effect at this position, makes the light more convergent, improves the stray light reduction effect, and improves the imaging quality of the optical lens system.

[0006] According to another aspect of the present invention, an optical lens system is provided, comprising: five lenses, the five lenses being sequentially arranged from the object side to the image side of the optical lens system, including a first lens to a fifth lens; a plurality of spacers, at least including a fourth spacer located on the image side of the fourth lens and in contact with the image side surface of the fourth lens; and a lens barrel for accommodating the lenses and the spacers; wherein the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d4s of the object side surface of the fourth spacer, and the outer diameter D4m of the image side surface of the fourth spacer satisfy the following: -1 < (d4s * D4m) / (f4 - f5) < 3; and the radius of curvature R9 of the object side surface of the fifth lens, the radius of curvature R10 of the image side surface of the fifth lens, the outer diameter D0m of the image side end face of the lens barrel, and the inner diameter d4m of the image side surface of the fourth spacer satisfy the following: -1.5 < (D0m + d4m) / (R9 + R10) < 16. This application provides a five-element optical lens system. Since the rear lenses, especially the fourth and fifth lenses, are close to the imaging surface, the light emitted through the fifth lens directly affects the image quality. By controlling the effective focal length, radius of curvature of the fourth and fifth lenses, as well as the inner and outer diameters of the fourth isolator, it is beneficial to control the lens surface shape, thereby reducing lens sensitivity, reducing stray light reflected from the lens, and improving the performance and stray light status of the optical lens system. At the same time, the fourth isolator effectively intercepts poorly formed light, making the light more convergent and improving the stray light reduction effect.

[0007] According to another aspect of the present invention, an optical lens system is provided, including: five lenses, which sequentially include a first lens to a fifth lens from the object side to the image side of the optical lens system; a plurality of spacers, at least including a fourth spacer located on the image side of the fourth lens and in contact with the image side surface of the fourth lens; a lens barrel for accommodating the lenses and the spacers; wherein, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d4s of the object side surface of the fourth spacer, and the outer diameter D4m of the image side surface of the fourth spacer satisfy: -1 < (d4s * D4m) / (f4 - f5) < 3; the outer diameter D4s of the object side surface of the fourth spacer, the inner diameter d4m of the image side surface of the fourth spacer, the perpendicular distance Yc51 between the critical point of the object side surface of the fifth lens and the optical axis, and the perpendicular distance Yc41 between the critical point of the object side surface of the fourth lens and the optical axis satisfy: 5 < (D4s - d4m) / (Yc51 - Yc41) < 36; the inner diameter d4m of the image side surface of the fourth spacer and the perpendicular distance Yc51 between the critical point of the object side surface of the fifth lens and the optical axis satisfy: 0 < d4m / Yc51 < 7. The present application provides a five-piece optical lens system. Since the rear lenses, especially the fourth lens and the fifth lens, are close to the imaging surface, the light rays exiting from the fifth lens directly affect the imaging quality. By controlling the effective focal lengths of the fourth lens and the fifth lens, the perpendicular distances between the critical points and the optical axis, and the inner and outer diameters of the fourth spacer, it is beneficial to control the lens surface shape, thereby reducing the lens sensitivity, reducing the lens reflected stray light. At the same time, the fourth spacer is used to effectively intercept the light rays with poor imaging, making the light rays more convergent, and also helps to ensure that the inner diameter of the object side surface of the fourth spacer is close to the optical outer diameter of the image side surface of the fourth lens, and the inner diameter of the image side surface of the fourth spacer should be close to the optical outer diameter of the object side surface of the fifth lens, improving the light blocking effect at this position, thereby enhancing the stray light improvement effect.

[0008] Further, at least one of the plurality of spacers includes a third spacer located on the image side of the third lens and in contact with the image side surface of the third lens. The effective focal length f3 of the third lens, the inner diameter d4s of the object side surface of the fourth spacer, the inner diameter d3s of the object side surface of the third spacer, and the distance EP34 along the optical axis from the image side surface of the third spacer to the object side surface of the fourth spacer satisfy: -16 mm < f3 * (d4s - d3s) / EP34 < -7 mm.

[0009] Further, at least one of the plurality of spacers includes a second spacer located on the image side of the second lens and in contact with the image side surface of the second lens, and a third spacer located on the image side of the third lens and in contact with the image side surface of the third lens. The effective focal length f2 of the second lens, the distance EP23 along the optical axis from the image side surface of the second spacer to the object side surface of the third spacer, and the air gap T23 between the second lens and the third lens on the optical axis satisfy: -65 < f2 / (EP23 - T23) < -28.

[0010] Furthermore, among the multiple isolators, at least one third isolator is located on the image side of the third lens and in contact with the image side of the third lens. The radius of curvature R6 of the image side of the third lens, the outer diameter D3s of the object side of the third isolator, and the inner diameter d3s of the object side of the third isolator satisfy the following: -2.5 < (D3s + d3s) / R6 < 1.5.

[0011] Furthermore, among the multiple isolators, at least one isolator is located on the image side of the second lens and in contact with the image side of the second lens. The radius of curvature R5 of the object side of the third lens, the radius of curvature R4 of the image side of the second lens, the outer diameter D2m of the image side of the second isolator, and the inner diameter d2s of the object side of the second isolator satisfy the following: -7<(R5-R4) / (D2m-d2s)<0.

[0012] Furthermore, among the plurality of isolators, at least one isolator is located on the image side of the first lens and in contact with the image side surface of the first lens. The effective focal length f1 of the first lens, the outer diameter D0s of the object side end face of the lens barrel, the inner diameter d0s of the object side end face of the lens barrel, and the distance EP01 along the optical axis from the object side end face of the lens barrel to the object side surface of the first isolator satisfy the following: <f1*(D0s+d0s) / EP01<33mm。

[0013] Furthermore, among the multiple isolators, at least one third isolator is located on the image side of the third lens and in contact with the image side surface of the third lens. The combined focal length f345 of the third, fourth, and fifth lenses, the distance EP34 along the optical axis from the image side surface of the third isolator to the object side surface of the fourth isolator, the thickness CP3 of the third isolator, the thickness CP4 of the fourth isolator, and the air gap T45 between the fourth and fifth lenses on the optical axis satisfy the following: -7 <f345 / (EP34-CP3-CP4-T45)<0。

[0014] Furthermore, the plurality of isolators includes at least a first isolator located on the image side of the first lens and in contact with the image side of the first lens, a second isolator located on the image side of the second lens and in contact with the image side of the second lens, and a third isolator located on the image side of the third lens and in contact with the image side of the third lens. The Abbe number V1 of the first lens, the inner diameter d1s of the object side of the first isolator, the Abbe number V2 of the second lens, the inner diameter d2s of the object side of the second isolator, the Abbe number V3 of the third lens, the inner diameter d3s of the object side of the third isolator, the distance EP23 from the image side of the second isolator to the object side of the third isolator along the optical axis, and the distance EP12 from the image side of the first isolator to the object side of the second isolator along the optical axis satisfying: 23 < (V1 / d1s + V2 / d2s + V3 / d3s) * (EP23 - EP12) < 38.

[0015] Furthermore, at least one of the plurality of spacers includes a first spacer located on the image side of the first lens and in contact with the image side surface of the first lens. The following relationships are satisfied among the radius of curvature R1 of the object side surface of the first lens, the radius of curvature R2 of the image side surface of the second lens, the outer diameter D1s of the object side surface of the first spacer, and the inner diameter d1s of the object side surface of the first spacer: -25 < (R1 + R2) / (D1s - d1s) < 0.

[0016] Furthermore, at least one of the plurality of spacers includes a second spacer located on the image side of the second lens and in contact with the image side surface of the second lens, and a second auxiliary spacer that is partially in contact with the image side surface of the second spacer. The following relationships are satisfied among the radius of curvature R5 of the object side surface of the third lens, the outer diameter D2bm of the image side surface of the second auxiliary spacer, and the inner diameter d2bm of the image side surface of the second auxiliary spacer: -14 < R5 / (D2bm - d2bm) < 0; The following relationships are satisfied among the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the thickness CP2 of the second spacer, and the thickness CP2b of the second auxiliary spacer: -35 < (f2 + f3) / (CP2 + CP2b) < -15.

[0017] Furthermore, at least one of the plurality of spacers includes a third spacer located on the image side of the third lens and in contact with the image side surface of the third lens, and a third auxiliary spacer that is partially in contact with the image side surface of the third spacer. The following relationships are satisfied among the outer diameter D3bm of the image side surface of the third auxiliary spacer, the inner diameter d,3bs of the object side surface of the third auxiliary spacer, the radius of curvature R5 of the object side surface of the third lens, and the radius of curvature R7 of the object side surface of the fourth lens: 0 < (D3bm + d3bs) / (R5 - R7) < 7.

[0018] Furthermore, at least one of the plurality of spacers includes a first spacer located on the image side of the first lens and in contact with the image side surface of the first lens, a second spacer located on the image side of the second lens and in contact with the image side surface of the second lens, and a third spacer located on the image side of the third lens and in contact with the image side surface of the third lens. The following relationships are satisfied between the inner diameter d1s of the object side surface of the first spacer and the inner diameter d2s of the object side surface of the second spacer: d1s / d2s > 1; The following relationships are satisfied between the inner diameter d3s of the object side surface of the third spacer and the inner diameter d4s of the object side surface of the fourth spacer: d3s / d4s < 1.

[0019] Furthermore, at least one of the plurality of spacers includes a third spacer located on the image side of the third lens and in contact with the image side surface of the third lens. The air gap between the third lens and the fourth lens on the optical axis is the largest among the air gaps between all adjacent lens pairs on the optical axis. The following relationship is satisfied among the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the distance EP34 along the optical axis from the image side surface of the third spacer to the object side surface of the fourth spacer, the central thickness CT3 of the third lens on the optical axis, and the central thickness CT4 of the fourth lens on the optical axis: 0 < |f3 - f4| / (EP34 - CT3 + T34 - CT4) < 15.

[0020] Furthermore, at least one of the plurality of spacers includes a third spacer located on the image side of the third lens and in contact with the image side surface of the third lens, a third auxiliary spacer in partial contact with the image side surface of the third spacer, and a third sub-auxiliary spacer in partial abutment with the image side surface of the third auxiliary spacer.

[0021] Furthermore, at least one of the plurality of spacers includes a second spacer located on the image side of the second lens and in contact with the image side surface of the second lens, a second auxiliary spacer in partial contact with the image side surface of the second spacer, and a second sub-auxiliary spacer in partial abutment with the image side surface of the second auxiliary spacer.

[0022] Applying the technical solution of the present invention, an optical lens system includes five lenses, a plurality of spacers, and a lens barrel. The five lenses sequentially include a first lens to a fifth lens from the object side to the image side of the optical lens system. At least one of the plurality of spacers includes a fourth spacer located on the image side of the fourth lens and in contact with the image side surface of the fourth lens. The lens barrel is used to accommodate the lenses and the spacers. Among them, the following relationship is satisfied between the Abbe number V4 of the fourth lens and the Abbe number V5 of the fifth lens: -40 < V4 - V5 < -30. The following relationship is satisfied among the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d4s of the object side surface of the fourth spacer, and the outer diameter D4m of the image side surface of the fourth spacer: -1 < (d4s * D4m) / (f4 - f5) < 3. The following relationship is satisfied among the curvature radius R7 of the object side surface of the fourth lens, the curvature radius R8 of the image side surface of the fourth lens, the thickness CP4 of the fourth spacer, the air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical lens system, and the central thickness CT5 of the fifth lens: -40 < (R7 + R8) / (CP4 + T45 + CT5) < -18.

[0023] This application provides a five-element optical lens system. Since the rear lenses, especially the fourth and fifth lenses, are close to the imaging surface, the light emitted through the fifth lens directly affects the image quality. By controlling the Abbe number, effective focal length, radius of curvature, center thickness, and lens spacing of the fourth and fifth lenses, as well as the inner and outer diameters and thickness of the fourth isolator, it is beneficial to control the lens surface shape, thereby reducing lens sensitivity and reducing stray light reflected from the lens. At the same time, the fourth isolator effectively intercepts poorly imaging light and reduces the transmission of some non-imaging light caused by penetrating light between lenses, making the light more convergent and improving the stray light reduction effect. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0025] Figure 1 A schematic diagram of an optical lens system according to an optional embodiment of the present invention is shown;

[0026] Figure 2 A schematic diagram of the optical lens system of Example 1 of the present invention in a first state is shown;

[0027] Figure 3 A schematic diagram of the optical lens system of Example 1 of the present invention in a second state is shown;

[0028] Figure 4 A schematic diagram of the optical lens system of Example 1 of the present invention in a third state is shown;

[0029] Figures 5 to 9 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, magnification chromatic aberration curve, and relative illuminance curve of Example 1 of the present invention are shown respectively.

[0030] Figure 10 A schematic diagram of the optical lens system of Example 2 of the present invention in a first state is shown;

[0031] Figure 11 A schematic diagram of the optical lens system of Example 2 of the present invention in a second state is shown;

[0032] Figure 12 A schematic diagram of the optical lens system of Example 2 of the present invention in a third state is shown;

[0033] Figures 13 to 17 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, magnification chromatic aberration curve, and relative illuminance curve of Example 2 of the present invention are shown respectively.

[0034] Figure 18 A schematic diagram of the optical lens system of Example 3 of the present invention in a first state is shown;

[0035] Figure 19 A schematic diagram of the optical lens system of Example 3 of the present invention in a second state is shown;

[0036] Figure 20 A schematic diagram of the optical lens system of Example 3 of the present invention in a third state is shown;

[0037] Figures 21 to 25 The on-axis chromatic aberration curve, astigmatism curve, distortion curve, magnification chromatic aberration curve, and relative illuminance curve of Example 3 of the present invention are shown respectively.

[0038] Figure 26 A schematic diagram of stray light energy of an optical lens system according to an alternative embodiment of the present invention is shown.

[0039] The above figures include the following reference numerals:

[0040] P0, Lens tube; E1, First lens; S1, Object-side surface of the first lens; S2, Image-side surface of the first lens; P1, First isolator; E2, Second lens; S3, Object-side surface of the second lens; S4, Image-side surface of the second lens; P2, Second isolator; P2b, Second auxiliary isolator; P2c, Second auxiliary isolator; E3, Third lens; S5, Object-side surface of the third lens; S6, Image-side surface of the third lens; P3, Third isolator; P3b, Third auxiliary isolator; P3c, Third auxiliary isolator; E4, Fourth lens; S7, Object-side surface of the fourth lens; S8, Image-side surface of the fourth lens; P4, Fourth isolator; E5, Fifth lens; S9, Object-side surface of the fifth lens; S10, Image-side surface of the fifth lens; P5, Fifth isolator. Detailed Implementation

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0043] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0044] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0045] In the accompanying 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 illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0046] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of that convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of that concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The determination of the surface shape in the paraxial region can be based on the judgment method commonly used by those knowledgeable in the field, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens data in optical software) to determine convexity or concavity. For the object side, a positive R value indicates a convex surface, and a negative R value indicates a concave surface; for the image side, a positive R value indicates a concave surface, and a negative R value indicates a convex surface.

[0047] The main objective of this invention is to provide an optical lens system to solve the problem of stray light easily generated in the back-end system of existing optical lens systems.

[0048] Example 1

[0049] like Figures 1 to 26As shown in the figure, the optical lens system includes five lenses, multiple spacers, and a lens barrel. The five lenses sequentially include a first lens to a fifth lens from the object side to the image side of the optical lens system. At least one of the multiple spacers includes a fourth spacer located on the image side of the fourth lens and in contact with the image side surface of the fourth lens. The lens barrel is used to accommodate the lenses and spacers. Among them, the Abbe number V4 of the fourth lens and the Abbe number V5 of the fifth lens satisfy: -40 < V4 - V5 < -30; the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d4s of the object side surface of the fourth spacer, and the outer diameter D4m of the image side surface of the fourth spacer satisfy: -1 < (d4s * D4m) / (f4 - f5) < 3; the curvature radius R7 of the object side surface of the fourth lens, the curvature radius R8 of the image side surface of the fourth lens, the thickness CP4 of the fourth spacer, the air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical lens system, and the central thickness CT5 of the fifth lens satisfy: -40 < (R7 + R8) / (CP4 + T45 + CT5) < -18.

[0050] This application provides a five-piece optical lens system. Since the rear lenses, especially the fourth lens and the fifth lens, are close to the imaging surface, the light rays emerging from the fifth lens directly affect the imaging quality. By controlling the Abbe numbers, effective focal lengths, curvature radii, central thicknesses, lens spacings of the fourth lens and the fifth lens, as well as the inner and outer diameters and thickness of the fourth spacer, it is beneficial to control the lens surface shape, thereby reducing lens sensitivity, reducing lens reflection stray light. At the same time, the fourth spacer is used to effectively intercept the light rays with poor imaging, reducing the transmission of some non-imaging light rays caused by the penetration of light between lenses, making the light rays more convergent, and improving the stray light improvement effect. As Figure 26 shown, there is less stray light in the optical lens system of this application.

[0051] In addition, the optical lens system of this application can also balance chromatic aberration and improve the imaging quality of the optical lens system. At the same time, reasonably control the edge thickness ratio of the fourth lens and the fifth lens to ensure good processing feasibility of the lens and the accuracy of the bearing position between lenses after assembly, so that the optical parameters of the optical lens system meet the design requirements, and can also prevent interference between the effective diameter surfaces of the lenses in the optical axis direction after assembly, avoid abnormal appearance and performance of the lenses, and improve the appearance and performance yield.

[0052] Preferably, the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d4s of the object side surface of the fourth spacer, and the outer diameter D4m of the image side surface of the fourth spacer satisfy: -0.0604 ≤ (d4s * D4m) / (f4 - f5) ≤ 1.5492.

[0053] Preferably, the following conditions are satisfied among the radius of curvature R7 of the object side surface of the fourth lens, the radius of curvature R8 of the image side surface of the fourth lens, the thickness CP4 of the fourth spacer, the air gap T45 between the fourth lens and the fifth lens on the optical axis of the optical lens system, and the central thickness CT5 of the fifth lens: -35.5715 ≤ (R7 + R8) / (CP4 + T45 + CT5) ≤ -23.6473.

[0054] In this embodiment, the following conditions are satisfied among the effective focal length f4 of the fourth lens, the inner diameter d4m of the image side surface of the fourth spacer, the refractive index N4 of the fourth lens, and the refractive index N5 of the fifth lens: 2 < |f4 / d4m| * (N4 + N5) < 18. By limiting |f4 / d4m| * (N4 + N5) within a reasonable range, it helps to ensure that the inner diameter of the image side surface of the fourth spacer is close to the optical outer diameter of the object side surface of the fifth lens, improving the light blocking effect at this position; at the same time, it helps to reduce the sensitivity of the fourth lens and the fifth lens, effectively improving stray light, reducing the transmission of some non-imaging light caused by the penetration of light between lenses, and improving the imaging quality of the optical lens system. Preferably, 6.8514 ≤ |f4 / d4m| * (N4 + N5) ≤ 14.6346.

[0055] In this embodiment, among the multiple spacers, there is at least a third spacer located on the image side of the third lens and in contact with the image side surface of the third lens. The following conditions are satisfied among the effective focal length f3 of the third lens, the inner diameter d4s of the object side surface of the fourth spacer, the inner diameter d3s of the object side surface of the third spacer, and the distance EP34 along the optical axis from the image side surface of the third spacer to the object side surface of the fourth spacer: -16 mm < f3 * (d4s - d3s) / EP34 < -7 mm. By limiting f3 * (d4s - d3s) / EP34 within a reasonable range, it is possible to reasonably control the inner diameter sizes of the object side surfaces of the third spacer and the fourth spacer, thereby effectively controlling the interception of the light rays emerging from the edges of the effective diameters of the third lens and the fourth lens. Under the condition of ensuring the illuminance of the optical lens system, the more light is blocked, the better the stray light is improved, and the higher the imaging quality is; at the same time, controlling the distance along the optical axis from the image side surface of the third spacer to the object side surface of the fourth spacer helps to reduce optical distortion and balance the system field curvature. Preferably, -11.9518 mm ≤ f3 * (d4s - d3s) / EP34 ≤ -9.3133 mm.

[0056] In this embodiment, the following relationship is satisfied among the radius of curvature R9 of the object side surface of the fifth lens, the radius of curvature R10 of the image side surface of the fifth lens, the outer diameter D0m of the image side end surface of the lens barrel, and the inner diameter d4m of the image side surface of the fourth spacer: -1.5 < (D0m + d4m) / (R9 + R10) < 16. By restricting (D0m + d4m) / (R9 + R10) within a reasonable range, the surface profiles of the object side surface and the image side surface of the fifth lens can be effectively controlled, the lens sensitivity can be reduced, the stray light reflected from the image side of the fifth lens can be decreased, and the performance and stray light state of the optical lens system can be improved; the outer diameter of the image side end surface of the lens barrel is mainly controlled by the window opening of the module and the size of the assembly bearing area. These dimensions affect the overall appearance style of the lens barrel. Under the condition that the optical effective diameter is fixed, the better the thickness uniformity of the lens barrel wall, the more stable the reliability of the optical lens system, and thus it is more conducive to meeting the appearance control requirements. Preferably, -0.4571 ≤ (D0m + d4m) / (R9 + R10) ≤ 14.9401

[0057] In this embodiment, among the multiple spacers, there are at least a second spacer located on the image side of the second lens and in contact with the image side surface of the second lens, and a third spacer located on the image side of the third lens and in contact with the image side surface of the third lens. The following relationship is satisfied among the effective focal length f2 of the second lens, the distance EP23 along the optical axis from the image side surface of the second spacer to the object side surface of the third spacer, and the air gap T23 between the second lens and the third lens on the optical axis: -65 < f2 / (EP23 - T23) < -28. By restricting f2 / (EP23 - T23) within a reasonable range, the blocking situation of the light rays emitted by the second lens by the second spacer can be controlled. Under the condition of ensuring the illuminance of the optical lens system, the more light is blocked, the better, and the higher the imaging quality of the optical lens system; at the same time, the air gap between the second lens and the third lens on the optical axis is conducive to controlling the thickness of the third lens and ensuring the requirements for lens forming. Preferably, -59.7423 ≤ f2 / (EP23 - T23) ≤ -33.4828.

[0058] In this embodiment, among the multiple spacers, there is at least a third spacer located on the image side of the third lens and in contact with the image side surface of the third lens. The following relationship is satisfied among the radius of curvature R6 of the image side surface of the third lens, the outer diameter D3s of the object side surface of the third spacer, and the inner diameter d3s of the object side surface of the third spacer: -2.5 < (D3s + d3s) / R6 < 1.5. By restricting (D3s + d3s) / R6 within a reasonable range, the inner and outer diameter dimensions of the third spacer determine the contact area of the spacer. The larger the contact area, the more stable the assembly structure. The inner diameter of the object side surface of the third spacer can effectively block the reflected stray light generated at the edge of the effective diameter of the image side surface of the third lens. At the same time, the larger the thickness of the third spacer, the more conducive it is to controlling the shape of the third spacer and the stray light improvement effect. Preferably, -1.3187 ≤ (D3s + d3s) / R6 ≤ 0.6682.

[0059] In this embodiment, at least one of the plurality of spacers includes a second spacer located on the image side of the second lens and in contact with the image side surface of the second lens. The following relationship is satisfied among the radius of curvature R5 of the object side surface of the third lens, the radius of curvature R4 of the image side surface of the second lens, the outer diameter D2m of the image side surface of the second spacer, and the inner diameter d2s of the object side surface of the second spacer: -7 < (R5 - R4) / (D2m - d2s) < 0. By limiting (R5 - R4) / (D2m - d2s) within a reasonable range and reasonably distributing the radii of curvature of the second lens and the third lens, the chromatic aberration of the system can be effectively balanced, the sensitivity of the two lenses can be reduced, and it is also beneficial to avoid the problem of difficult surface forming in actual processing due to excessive inclination angle. Controlling the inner and outer diameters of the second spacer is beneficial to blocking stray light and avoiding the risk of stray light. Preferably, -4.0654 ≤ (R5 - R4) / (D2m - d2s) ≤ -2.3548.

[0060] In this embodiment, at least one of the plurality of spacers includes a first spacer located on the image side of the first lens and in contact with the image side surface of the first lens. The following relationship is satisfied among the effective focal length f1 of the first lens, the outer diameter D0s of the object side end surface of the lens barrel, the inner diameter d0s of the object side end surface of the lens barrel, and the distance EP01 along the optical axis from the object side end surface of the lens barrel to the object side surface of the first spacer: 22 mm < f1*(D0s + d0s) / EP01 < 33 mm. By limiting f1*(D0s + d0s) / EP01 within a reasonable range, the edge thickness of the first lens can be effectively controlled by the distance along the optical axis from the object side end surface of the lens barrel to the object side surface of the first spacer, ensuring the feasibility of lens forming; reasonably using spacers between the lens barrel and the lens can effectively improve the assembly stability of the optical lens system and improve the performance yield; at the same time, the first spacer can control the interception of the outgoing light of the first lens, and under the condition of ensuring the illuminance of the optical lens system, the imaging quality of the optical lens system is higher. Preferably, 26.9166 mm ≤ f1*(D0s + d0s) / EP01 ≤ 29.2670 mm.

[0061] In this embodiment, at least one of the multiple spacers includes a third spacer located on the image side of the third lens and in contact with the image side surface of the third lens. The combined focal length f345 of the third lens, the fourth lens, and the fifth lens, the distance EP34 along the optical axis from the image side surface of the third spacer to the object side surface of the fourth spacer, the thickness CP3 of the third spacer, the thickness CP4 of the fourth spacer, and the air gap T45 between the fourth lens and the fifth lens on the optical axis satisfy: -7 < f345 / (EP34 - CP3 - CP4 - T45) < 0. By restricting f345 / (EP34 - CP3 - CP4 - T45) within a reasonable range and connecting the third lens, the fourth lens, and the fifth lens through the third spacer and the fourth spacer respectively, excess light can be intercepted, and the field curvature of the optical lens system can be controlled by controlling the thickness of the spacers, preventing problems such as stray light and light leakage, which is beneficial to improving the imaging quality and ensuring a good imaging effect. Preferably, -4.8033 ≤ f345 / (EP34 - CP3 - CP4 - T45) ≤ -3.8664.

[0062] In this embodiment, at least one of the multiple spacers includes a first spacer located on the image side of the first lens and in contact with the image side surface of the first lens, a second spacer located on the image side of the second lens and in contact with the image side surface of the second lens, and a third spacer located on the image side of the third lens and in contact with the image side surface of the third lens. The Abbe number V1 of the first lens, the inner diameter d1s of the object side surface of the first spacer, the Abbe number V2 of the second lens, the inner diameter d2s of the object side surface of the second spacer, the Abbe number V3 of the third lens, the inner diameter d3s of the object side surface of the third spacer, the distance EP23 along the optical axis from the image side surface of the second spacer to the object side surface of the third spacer, and the distance EP12 along the optical axis from the image side surface of the first spacer to the object side surface of the second spacer satisfy: 23 < (V1 / d1s + V2 / d2s + V3 / d3s) * (EP23 - EP12) < 38. By restricting (V1 / d1s + V2 / d2s + V3 / d3s) * (EP23 - EP12) within a reasonable range, by controlling the combination of lenses made of materials with different Abbe numbers, it is beneficial to balance chromatic aberration and improve the imaging quality; reasonably controlling the distances between the first spacer, the second spacer, and the third spacer is beneficial to controlling the convergence of light, perfectly matching with the receiver, and making the edge thickness of the lens more uniform, meeting the requirements of lens forming and strength. Preferably, 26.8511 ≤ (V1 / d1s + V2 / d2s + V3 / d3s) * (EP23 - EP12) ≤ 35.2335.

[0063] In this embodiment, at least one of the plurality of spacers includes a first spacer located on the image side of the first lens and in contact with the image side surface of the first lens. The following relationship is satisfied among the radius of curvature R1 of the object side surface of the first lens, the radius of curvature R2 of the image side surface of the second lens, the outer diameter D1s of the object side surface of the first spacer, and the inner diameter d1s of the object side surface of the first spacer: -25 < (R1 + R2) / (D1s - d1s) < 0. By restricting (R1 + R2) / (D1s - d1s) within a reasonable range, it helps to control the thickness of the first lens near the edge, further control the ratio of the edge thickness to the central thickness of the second lens from being too large, ensure the molding requirements of the first lens and the second lens, and at the same time meet the need to improve the stray light of the optical lens system; in addition, controlling the edge thickness of the lens not to be too large can avoid increasing the internal reflection paths in the lens and affecting the improvement of the shooting effect of the lens. Preferably, -20.2733 ≤ (R1 + R2) / (D1s - d1s) ≤ -5.9681.

[0064] In this embodiment, at least one of the plurality of spacers includes a second spacer located on the image side of the second lens and in contact with the image side surface of the second lens, and a second auxiliary spacer that is partially in contact with the image side surface of the second spacer. The following relationship is satisfied among the radius of curvature R5 of the object side surface of the third lens, the outer diameter D2bm of the image side surface of the second auxiliary spacer, and the inner diameter d2bm of the image side surface of the second auxiliary spacer: -14 < R5 / (D2bm - d2bm) < 0; the following relationship is satisfied among the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the thickness CP2 of the second spacer, and the thickness CP2b of the second auxiliary spacer: -35 < (f2 + f3) / (CP2 + CP2b) < -15. By restricting the above conditional expressions within a reasonable range and reasonably controlling the outer diameter and inner diameter of the image side surface of the second auxiliary spacer, it helps to control the shape of the second auxiliary spacer and the stray light improvement effect, ensure a sufficient bearing area, and contribute to improving the assembly stability of the optical lens system; reasonably regulating the effective focal lengths of the second lens and the third lens and the spacer thickness can effectively reduce the deflection angle of light rays in the second lens and the third lens, reduce the ghost image energy between the two lenses, and at the same time can also better reduce the optical distortion and balance the system field curvature; at the same time, the thicknesses of the second spacer and the second auxiliary spacer can reasonably distribute the edge thicknesses of the second lens and the third lens, facilitating the lens processing and molding requirements and making its surface shape smoother. Preferably, -9.5552 ≤ R5 / (D2bm - d2bm) ≤ -2.6372; -29.2617 ≤ (f2 + f3) / (CP2 + CP2b) ≤ -20.1934.

[0065] In this embodiment, the plurality of isolators includes at least a third isolator located on the image side of the third lens and in contact with the image side of the third lens, and a third auxiliary isolator partially in contact with the image side of the third isolator. The outer diameter D3bm of the image side of the third auxiliary isolator, the inner diameter d3bs of the object side of the third auxiliary isolator, the radius of curvature R5 of the object side of the third lens, and the radius of curvature R7 of the object side of the fourth lens satisfy the following condition: 0 < (D3bm + d3bs) / (R5 - R7) < 7. By limiting (D3bm + d3bs) / (R5 - R7) within a reasonable range, adding a third isolator and a third auxiliary isolator between the third and fourth lenses can effectively block stray light from both sides of the third and fourth lenses, ensuring the imaging quality of the optical lens system. Reasonably controlling the outer diameter of the image side and the inner diameter of the object side of the third auxiliary isolator helps to control the shape of the third auxiliary isolator and the stray light improvement effect, and helps to improve the assembly stability of the optical lens system. Controlling the curvature radius of the object side of the third and fourth lenses can reduce the transmission of some non-imaging light caused by penetrating light between lenses, which helps to improve stray light and improve image quality. Preferably, 1.3787≤(D3bm+d3bs) / (R5-R7)≤5.2801.

[0066] In this embodiment, the plurality of isolators includes at least a first isolator located on the image side of the first lens and in contact with the image side of the first lens, a second isolator located on the image side of the second lens and in contact with the image side of the second lens, and a third isolator located on the image side of the third lens and in contact with the image side of the third lens. The inner diameter d1s of the object side of the first isolator and the inner diameter d2s of the object side of the second isolator satisfy: d1s / d2s>1; the inner diameter d3s of the object side of the third isolator and the inner diameter d4s of the object side of the fourth isolator satisfy: d3s / d4s<1. By limiting the above conditional expressions within a reasonable range and reasonably setting the inner diameters of the first, second, third, and fourth isolators, the vignetting value of the system can be effectively controlled, light with poor imaging quality can be blocked, and the light can be made more convergent, thereby improving the resolution of the entire system; in addition, it can also block stray light reflected multiple times from the effective diameter edge of the lens, preventing stray light from hitting the imaging surface and affecting image quality. Preferably, 1.1984≤d1s / d2s≤1.2370; 0.5852≤d3s / d4s≤0.5980.

[0067] In this embodiment, at least one of the multiple isolators is located on the image side of the third lens and in contact with the image side of the third lens. The air gap between the third lens and the fourth lens on the optical axis is the largest among all adjacent pairs of lenses. The effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the distance EP34 from the image side of the third isolator to the object side of the fourth isolator along the optical axis, the center thickness CT3 of the third lens on the optical axis, and the center thickness CT4 of the fourth lens on the optical axis satisfy the following condition: 0 < |f3-f4| / (EP34-CT3+T34-CT4) < 15. By limiting |f3-f4| / (EP34-CT3+T34-CT4) within a reasonable range, the lens edge thickness and the center thickness of the lens on the optical axis can be reasonably controlled, ensuring good manufacturing feasibility of the lens and effectively guaranteeing the accuracy of the bearing position between the lenses after assembly, so that the optical parameters of the optical lens system meet the design requirements. Preferably, 4.1051≤|f3-f4| / (EP34-CT3+T34-CT4)≤10.3935.

[0068] In this embodiment, the plurality of isolators includes at least a third isolator located on the image side of the third lens and in contact with the image side of the third lens, a third auxiliary isolator in contact with a portion of the image side of the third isolator, and a third auxiliary isolator abutting against a portion of the image side of the third auxiliary isolator. By reasonably controlling the contact position between the third auxiliary isolator and the third isolator, it is beneficial to intercept excess stray light at the edge of the fourth lens, effectively reduce stray light, and improve the imaging quality of the optical lens system. On the other hand, it can improve the assembly stability of the optical lens system, thereby improving the performance yield.

[0069] In this embodiment, the plurality of isolators includes at least a second isolator located on the image side of the second lens and in contact with the image side of the second lens, a second auxiliary isolator in contact with a portion of the image side of the second isolator, and a second auxiliary isolator abutting against the image side of the second auxiliary isolator. By reasonably controlling the thickness and position of the second auxiliary isolator and the second isolator, the edge thickness of the second and third lenses can be reasonably distributed, which helps to control the shape and forming requirements of the second and third lenses. Simultaneously, the second isolator helps to reduce the assembly stage difference of the optical lens system; the smaller the assembly stage difference, the better the assembly stability. Furthermore, the thickness and position of the second auxiliary isolator can effectively control the outgoing light from the second lens and the incoming light from the third lens. Under the condition of ensuring the illuminance of the optical lens system, the more light blocked, the better the improvement of stray light, and the higher the imaging quality of the optical lens system.

[0070] In this embodiment, the following conditions are satisfied among the outer diameter D4s of the object side surface of the fourth spacer, the inner diameter d4m of the image side surface of the fourth spacer, the perpendicular distance Yc51 between the critical point of the object side surface of the fifth lens and the optical axis, and the perpendicular distance Yc41 between the critical point of the object side surface of the fourth lens and the optical axis: 5 < (D4s - d4m) / (Yc51 - Yc41) < 36; the following conditions are satisfied between the inner diameter d4m of the image side surface of the fourth spacer and the perpendicular distance Yc51 between the critical point of the object side surface of the fifth lens and the optical axis: 0 < d4m / Yc51 < 7. By restricting the above conditional expressions within a reasonable range and controlling the inner and outer diameters of the fourth spacer and the distances between the critical points of the object side surfaces of the fourth and fifth lenses and the optical axis, it helps to ensure that the inner diameter of the object side surface of the fourth spacer is close to the optical outer diameter of the image side surface of the fourth lens, and the inner diameter of the image side surface of the fourth spacer should be close to the optical outer diameter of the object side surface of the fifth lens, improving the light blocking effect at this position and at the same time helping to reduce the sensitivity of the fourth lens and the fifth lens. Preferably, 11.5715 ≤ (D4s - d4m) / (Yc51 - Yc41) ≤ 30.4737; 2.0733 ≤ d4m / Yc51 ≤ 2.1173.

[0071] Embodiment 2

[0072] As Figures 1 to 26 shown, the optical lens system includes five lenses, multiple spacers, and a lens barrel. The five lenses sequentially include the first lens to the fifth lens from the object side to the image side of the optical lens system; at least the fourth spacer located on the image side of the fourth lens and in contact with the image side surface of the fourth lens is included among the multiple spacers; the lens barrel is used to accommodate the lenses and the spacers; wherein, the following conditions are satisfied among the effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d4s of the object side surface of the fourth spacer, and the outer diameter D4m of the image side surface of the fourth spacer: -1 < (d4s * D4m) / (f4 - f5) < 3; the following conditions are satisfied among the effective focal length f4 of the fourth lens, the inner diameter d4m of the image side surface of the fourth spacer, the refractive index N4 of the fourth lens, and the refractive index N5 of the fifth lens: 2 < |f4 / d4m| * (N4 + N5) < 18.

[0073] This application provides a five-element optical lens system. Since the rear lenses, especially the fourth and fifth lenses, are close to the imaging plane, the light emitted through the fifth lens directly affects the image quality. By controlling the effective focal length, refractive index, and inner and outer diameters of the fourth isolator, the sensitivity of the fourth and fifth lenses is reduced, stray light reflected from the lenses is decreased, and the inner diameter of the image side of the fourth isolator is kept close to the outer diameter of the object side of the fifth lens. The fourth isolator effectively blocks poorly imaging light, reduces the transmission of non-imaging light caused by light penetrating between lenses, improves the light-blocking effect at this position, makes the light more convergent, enhances the stray light reduction effect, and improves the imaging quality of the optical lens system. Figure 26 As shown, the optical lens system in this application has less stray light.

[0074] This embodiment may also include other parametric formulas as described in Embodiment 1, which will not be elaborated here.

[0075] Example 3

[0076] like Figures 1 to 26 As shown, the optical lens system includes five lenses, multiple spacers, and a lens barrel. The five lenses, from the object side to the image side, sequentially include the first lens to the fifth lens. The multiple spacers include at least a fourth spacer located on the image side of the fourth lens and in contact with its image-side surface. The lens barrel is used to house the lenses and spacers. The effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d4s of the object side surface of the fourth spacer, and the outer diameter D4m of the image side surface of the fourth spacer satisfy the following condition: -1 < (d4s * D4m) / (f4 - f5) < 3. The radius of curvature R9 of the object side surface of the fifth lens, the radius of curvature R10 of the image side surface of the fifth lens, the outer diameter D0m of the image-side end face of the lens barrel, and the inner diameter d4m of the image side surface of the fourth spacer satisfy the following condition: -1.5 < (D0m + d4m) / (R9 + R10) < 16.

[0077] This application provides a five-element optical lens system. Since the rear lenses, especially the fourth and fifth lenses, are close to the imaging plane, the light emitted through the fifth lens directly affects the image quality. By controlling the effective focal length and radius of curvature of the fourth and fifth lenses, as well as the inner and outer diameters of the fourth isolator, it is beneficial to control the lens surface shape, thereby reducing lens sensitivity, decreasing stray light reflection, and improving the performance and stray light status of the optical lens system. Simultaneously, the fourth isolator effectively intercepts poorly formed light, making the light more convergent and improving the stray light reduction effect. Figure 26 As shown, the optical lens system in this application has less stray light.

[0078] In addition, the outer diameter of the image-side end face of the lens barrel is mainly controlled by the size of the module window and the assembly support area. These dimensions affect the overall appearance of the lens barrel. Under the condition of fixed optical effective diameter, the better the uniformity of the lens barrel wall thickness, the more stable the reliability of the optical lens system, which is more conducive to meeting the appearance control requirements.

[0079] This embodiment may also include other parametric formulas as described in Embodiment 1, which will not be elaborated here.

[0080] Example 4

[0081] like Figures 1 to 26 As shown, the optical lens system includes five lenses, multiple spacers, and a lens barrel. The five lenses, from the object side to the image side, sequentially include a first lens to a fifth lens. At least one of the multiple spacers is a fourth spacer located on the image side of the fourth lens and in contact with the image side surface of the fourth lens. The lens barrel is used to house the lenses and spacers. The effective focal length f4 of the fourth lens, the effective focal length f5 of the fifth lens, the inner diameter d4s of the object side surface of the fourth spacer, and the outer diameter D4m of the image side surface of the fourth spacer satisfy the following relationship: -1 < (d4s / d4s). s*D4m) / (f4-f5)<3; The outer diameter D4s of the object side of the fourth isolator, the inner diameter d4m of the image side of the fourth isolator, the perpendicular distance Yc51 from the critical point of the object side of the fifth lens to the optical axis, and the perpendicular distance Yc41 from the critical point of the object side of the fourth lens to the optical axis satisfy: 5<(D4s-d4m) / (Yc51-Yc41)<36; The inner diameter d4m of the image side of the fourth isolator and the perpendicular distance Yc51 from the critical point of the object side of the fifth lens to the optical axis satisfy: 0 <d4m / Yc51<7。

[0082] This application provides a five-element optical lens system. Since the rear lenses, especially the fourth and fifth lenses, are close to the imaging plane, the light emitted through the fifth lens directly affects the image quality. By controlling the effective focal length of the fourth and fifth lenses, the perpendicular distance between their critical points and the optical axis, and the inner and outer diameters of the fourth isolator, it is beneficial to control the lens surface shape, thereby reducing lens sensitivity and stray light reflection. Simultaneously, the fourth isolator effectively intercepts poorly formed light, making the light more convergent. It also helps ensure that the inner diameter of the object-side surface of the fourth isolator is close to the optical outer diameter of the image-side surface of the fourth lens, and the inner diameter of the image-side surface of the fourth isolator should be close to the optical outer diameter of the object-side surface of the fifth lens, improving the light-blocking effect at this position and thus enhancing the stray light reduction effect. Figure 26 As shown, the optical lens system in this application has less stray light.

[0083] This embodiment may also include other parametric formulas as described in Embodiment 1, which will not be elaborated here.

[0084] Optionally, the aforementioned optical lens system may further include a filter for correcting color aberrations and / or a protective glass for protecting the photosensitive element located on the imaging surface. The optical lens system in this application may employ multiple lenses, such as the five lenses described above. By rationally allocating the effective focal length, surface shape, center thickness of each lens, and on-axis distance between lenses, the aperture of the optical lens system can be effectively increased, the sensitivity of the lens reduced, and the manufacturability of the lens improved. This makes the optical lens system more conducive to manufacturing and suitable for portable electronic devices such as smartphones.

[0085] In this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. An aspherical lens is characterized by a continuously changing curvature from its center to its periphery. Unlike a spherical lens, which has a constant curvature from its center to its periphery, an aspherical lens has superior curvature radius characteristics, offering advantages in improving distortion and astigmatism. By using aspherical lenses, aberrations occurring during image formation can be eliminated as much as possible, thereby improving image quality.

[0086] However, those skilled in the art will understand that the number of lenses constituting the optical lens system can be changed without departing from the technical solutions claimed in this application to obtain the various results and advantages described in this specification. For example, although five lenses have been described as an example in the embodiments, the optical lens system is not limited to including five lenses. If necessary, the optical lens system may also include other numbers of lenses.

[0087] Figure 1 A schematic diagram of an optical lens system according to this application is shown. Figure 1 The diagram also labels parameters such as d0s, D4m, and d4s to provide a clear and intuitive understanding of their meaning. To better illustrate the structure and specific surface features of the optical lens system, these parameters will not be shown in the accompanying diagrams when explaining specific examples.

[0088] Where Dis refers to the outer diameter of the object side of the i-th isolator, dis refers to the inner diameter of the object side of the i-th isolator, Dim refers to the outer diameter of the image side of the i-th isolator, dim refers to the inner diameter of the image side of the i-th isolator, CPi refers to the thickness of the i-th isolator, which is the maximum distance along the optical axis from the object side to the image side of the i-th isolator, and EPij refers to the distance along the optical axis between the image side of the i-th isolator and the object side of the j-th isolator, where i and j are both positive integers greater than or equal to 1. d0s is the inner diameter of the object side end face of the lens barrel, and D0m is the outer diameter of the image side end face of the lens barrel. The maximum height of the lens barrel P0 refers to the maximum distance along the optical axis from the object side end face to the image side end face of the lens barrel P0.

[0089] The following description, with reference to the accompanying drawings, further illustrates examples of specific surface shapes and parameters of optical lens systems applicable to the above embodiments.

[0090] It should be noted that the following examples include both a first state and a second state. In the same example, the first, second, third, fourth, and fifth lenses of the optical lens system in both states have the same radii of curvature, center thickness, inter-lens spacing, and higher-order image coefficients. However, the parameters such as the lens barrel P0, the thickness of the spacers, the maximum thickness of the spacers, the inner and outer diameters of the spacers, and the distance between the spacers differ, as do the shapes of some lenses. In other words, the main structures used for imaging are the same, but the auxiliary structures used for imaging are different.

[0091] It should be noted that any of the examples one through three below are applicable to all embodiments of this application.

[0092] Example 1

[0093] like Figures 2 to 9 As shown, an optical lens system of Example 1 of this application is described. Figure 2 A schematic diagram of the optical lens system in Example 1 in its first state is shown. Figure 3 A schematic diagram of the optical lens system of Example 1 in the second state is shown. Figure 4 A schematic diagram of the optical lens system of Example 1 in the third state is shown.

[0094] like Figure 2 and Figure 4 As shown, the optical lens system, from the object side to the image side, sequentially includes a first lens E1, a first isolator P1, a second lens E2, a second isolator P2, a second auxiliary isolator P2b, a third lens E3, a third isolator P3, a third auxiliary isolator P3b, a third auxiliary isolator P3c, a fourth lens E4, a fourth isolator P4, and a fifth lens E5. Two isolators are placed between the second and third lenses, and three isolators are placed between the third and fourth lenses. These provide strong support and ensure sufficient bearing space, while also better intercepting stray light and improving image quality.

[0095] like Figure 3 As shown, between the second lens and the third lens, there is also a second auxiliary isolator P2c on which the image side portion of the second auxiliary isolator P2b rests, to further intercept stray light.

[0096] exist Figure 2 and Figure 3In the middle, the isolation components are all located between two adjacent lenses, and each isolation component abuts against part of the inner wall surface of the lens barrel P0. Specifically, it abuts against the inner wall surface of the lens barrel P0 that is parallel to the optical axis. The first lens E1 to the fifth lens E5 are all spaced apart and do not directly abut against each other.

[0097] exist Figure 4 In this assembly, the first lens and the second lens are fastened together, and the first isolation member is located inside the fastening structure, which improves the stability of the assembly.

[0098] like Figures 2 to 4 As shown, the object-side surface of the first lens is S1, the image-side surface of the first lens is S2, the object-side surface of the second lens is S3, the image-side surface of the second lens is S4, the object-side surface of the third lens is S5, the image-side surface of the third lens is S6, the object-side surface of the fourth lens is S7, the image-side surface of the fourth lens is S8, the object-side surface of the fifth lens is S9, and the image-side surface of the fifth lens is S10.

[0099] Table 1 shows the basic structural parameters of the optical lens system in Example 1, where the units for radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0100] Surface number Surface type Radius of curvature Thickness Refractive index Abbe number Conic constant OBJ Sphere Infinity Infinity STO Sphere sto Infinity -0.8699 S1 Asphere 2.1285 1.2554 1.55 55.92 0.0033 S2 Asphere -19.6710 0.0300 1.5043 S3 Asphere 9.7595 0.2857 1.67 20.37 2.0278 S4 Asphere 3.4416 1.0674 0.5053 S5 Asphere -2.7274 0.3393 1.55 55.92 -0.7125 S6 Asphere -6.0556 2.0016 -15.3405 S7 Asphere -4.5184 0.5259 1.67 20.37 -2.3629 S8 Asphere -7.1535 0.0489 6.1885 S9 Asphere -14.3180 0.4227 1.55 55.92 23.6567 S10 Asphere -13.5974 0.9231 -94.8749 S11 Sphere Infinity 0.1100 1.52 64.17 S12 Sphere Infinity 0.4900

[0101] Table 1

[0102] In Table 1 above, S11 is the object side of the filter, and S12 is the image side of the filter.

[0103] In Example 1, the object-side surface and image-side surface of any one of the lenses, from the first lens E1 to the fifth lens E5, are aspherical. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0104]

[0105] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R, that is, the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above; k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for the aspherical mirrors S1-S10 in Example 1.

[0106] Surface number A4 A6 A8 A10 A12 A14 A16 S1 -1.6528E-02 -8.7586E-03 -3.1653E-03 -1.2335E-03 -4.3001E-04 -1.4199E-04 -2.6901E-05 S2 2.7154E-02 1.0400E-02 -9.8270E-03 3.9932E-03 -1.7481E-03 8.9022E-04 -4.8738E-04 S3 1.1906E-02 2.9230E-02 -1.0713E-02 3.4719E-03 -1.0736E-03 6.2897E-04 -3.0315E-04 S4 6.5219E-02 2.5650E-02 -4.1834E-04 6.1869E-04 3.6272E-05 8.5426E-05 -5.3625E-06 S5 3.1387E-01 -1.5396E-02 -2.7263E-04 -1.5157E-04 -3.2508E-05 -2.7240E-06 2.6349E-07 S6 3.2264E-01 -5.5806E-03 -5.9938E-04 -1.6450E-04 -8.2984E-05 6.0357E-06 -3.9543E-06 S7 -2.0859E-01 4.4754E-02 4.7483E-02 8.4827E-03 -9.2767E-03 -4.5332E-03 -8.0942E-04 S8 -6.2749E-01 2.1357E-01 1.0218E-02 3.7964E-02 -1.3366E-02 -6.1027E-03 -8.9959E-03 S9 -7.8431E-01 3.6393E-01 -7.0728E-02 3.5749E-02 -1.5163E-02 -2.1128E-03 -5.1425E-03 S10 -7.2097E-01 8.5068E-02 -1.6037E-02 1.6458E-02 3.9872E-03 1.0254E-03 -8.3846E-04 Surface number A18 A20 A22 A24 A26 A28 A30 S1 -1.3506E-05 2.5248E-06 -3.6767E-06 2.8193E-07 1.9283E-07 9.4010E-07 -1.0848E-06 S2 2.5161E-04 -1.2355E-04 5.0523E-05 -1.7891E-05 2.5461E-06 0.0000E+00 0.0000E+00 S3 1.3695E-04 -5.6483E-05 1.2128E-05 -3.4258E-07 -4.3660E-06 0.0000E+00 0.0000E+00 S4 3.9848E-06 -4.6382E-07 -5.2883E-06 -8.7573E-07 0.0000E+00 0.0000E+00 0.0000E+00 S5 -2.0637E-06 5.7284E-06 1.1945E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 -2.9503E-06 -1.3012E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 1.1578E-03 7.0458E-04 2.7470E-04 -3.0393E-04 -7.8586E-06 -2.1129E-05 4.4859E-05 S8 3.5525E-03 -1.4928E-03 4.4539E-03 -1.9509E-03 5.3164E-04 -3.3242E-04 4.6341E-05 S9 6.3004E-03 -3.3003E-03 3.9385E-03 -3.9015E-03 1.8617E-03 -5.0629E-04 9.6011E-05 S10 -4.1840E-04 -9.0594E-04 2.4592E-04 -3.0339E-04 1.9869E-04 -5.5594E-05 2.8964E-05

[0107] Table 2

[0108] Figure 5The on-axis chromatic aberration curve of the optical lens system of Example 1 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the optical lens system. Figure 6 The astigmatism curves of the optical lens system in Example 1 are shown, representing the meridional image plane curvature and the sagittal image plane curvature. Figure 7 The distortion curves of the optical lens system in Example 1 are shown, representing the distortion magnitude values ​​corresponding to different field of view angles. Figure 8 The magnification chromatic aberration curve of the optical lens system in Example 1 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical lens system. Figure 9 The relative illumination curves of the optical lens system in Example 1 are shown, representing the relative illumination values ​​corresponding to different image heights.

[0109] according to Figures 5 to 9 As can be seen, the optical lens system given in Example 1 can achieve good imaging quality.

[0110] Example 2

[0111] like Figures 10 to 17 As shown, an optical lens system of Example 2 of this application is described. Figure 10 A schematic diagram of the optical lens system in Example 2 in its first state is shown. Figure 11 A schematic diagram of the optical lens system in Example 2 in the second state is shown. Figure 12 A schematic diagram of the optical lens system of Example 2 in its third state is shown. For the sake of brevity, descriptions similar to those in Example 1 are omitted.

[0112] like Figure 10 and Figure 12 As shown, the optical lens system, from the object side to the image side, sequentially includes a first lens E1, a first isolator P1, a second lens E2, a second isolator P2, a second auxiliary isolator P2b, a third lens E3, a third isolator P3, a third auxiliary isolator P3b, a third auxiliary isolator P3c, a fourth lens E4, a fourth isolator P4, a fifth lens E5, and a fifth isolator P5. Two isolators are placed between the second and third lenses, and three isolators are placed between the third and fourth lenses. These provide strong support and ensure sufficient bearing space, while also better intercepting stray light and improving image quality. A fifth isolator P5 is placed on the image side of the fifth lens to contact it, thereby fixing the fifth lens, which is closest to the image side, and improving the structural stability of the optical lens system.

[0113] like Figure 11 As shown, between the second lens and the third lens, there is also a second auxiliary isolator P2c on which the image side portion of the second auxiliary isolator P2b rests, to further intercept stray light.

[0114] exist Figure 10 In the middle, the isolation components are all located between two adjacent lenses, and each isolation component abuts against part of the inner wall surface of the lens barrel P0. Specifically, it abuts against the inner wall surface of the lens barrel P0 that is parallel to the optical axis. The first lens E1 to the fifth lens E5 are all spaced apart and do not directly abut against each other.

[0115] exist Figure 11 and Figure 12 In this assembly, the first lens and the second lens are fastened together, and the first isolation member is located inside the fastening structure, which improves the stability of the assembly.

[0116] Table 3 shows the basic structural parameters of the optical lens system in Example 2, where the units for radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0117] Surface number Surface type Radius of curvature Thickness Refractive index Abbe number Conic constant OBJ Sphere Infinity Infinity STO Sphere sto Infinity -0.8727 S1 Asphere 2.1231 1.2801 1.55 55.92 0.0025 S2 Asphere -14.9114 0.0301 -17.5587 S3 Asphere 9.5064 0.2670 1.67 20.37 -3.1925 S4 Asphere 3.2270 1.0674 -0.1609 S5 Asphere -3.2781 0.2500 1.55 55.92 0.5570 S6 Asphere -15.2636 1.8232 43.0437 S7 Asphere -8.8554 0.5500 1.67 20.37 -5.3306 S8 Asphere -5.2559 0.0299 2.0554 S9 Asphere 10.1047 0.4200 1.55 55.92 -99.0000 S10 Asphere 3.6678 1.1823 -35.2809 S11 Sphere Infinity 0.1100 1.52 64.17 S12 Sphere Infinity 0.4900

[0118] Table 3

[0119] Table 4 gives the higher-order coefficients of S1-S10 that can be used for each aspherical lens in Example 2. The surface shape of each aspherical lens can be limited by, but is not limited to, the formula (1) in Example 1.

[0120] Surface number A4 A6 A8 A10 A12 A14 A16 S1 -1.5853E-02 -9.0145E-03 -3.3449E-03 -1.2121E-03 -3.4947E-04 -1.1444E-04 -1.5462E-05 S2 3.4084E-02 5.8086E-03 -7.3808E-03 3.2734E-03 -1.6347E-03 8.0385E-04 -4.4090E-04 S3 4.8550E-03 2.8063E-02 -7.5271E-03 3.0468E-03 -1.0068E-03 5.1319E-04 -2.3007E-04 S4 5.6592E-02 2.5676E-02 7.1041E-04 9.6237E-04 8.0837E-05 7.7400E-05 -2.2735E-07 S5 3.0403E-01 -2.1521E-02 1.5698E-03 -5.2263E-04 1.3550E-05 -2.5746E-05 -7.4166E-06 S6 3.1802E-01 -1.3326E-02 1.1272E-03 -3.3357E-04 -3.4927E-05 -4.1580E-07 -5.5096E-06 S7 -2.2493E-01 1.8641E-02 5.4897E-02 2.4272E-03 -8.2058E-03 -4.2727E-03 5.1211E-04 S8 -2.4294E-01 5.1137E-02 3.6970E-02 1.9287E-02 -4.8961E-03 -4.0821E-03 -6.6494E-03 S9 -7.8746E-01 2.7749E-01 -5.3022E-02 2.4627E-02 -7.8276E-03 1.0002E-03 -4.6949E-03 S10 -8.7808E-01 1.6701E-01 -2.4262E-02 2.1204E-02 -7.2844E-04 -3.6077E-04 -2.3772E-03 Surface number A18 A20 A22 A24 A26 A28 A30 S1 -1.1533E-05 3.0424E-06 -3.5118E-06 7.0469E-07 1.6822E-07 1.8860E-06 -1.3980E-06 S2 2.0912E-04 -1.1276E-04 4.1602E-05 -1.9503E-05 3.5564E-06 0.0000E+00 0.0000E+00 S3 9.6690E-05 -3.7891E-05 5.4003E-06 -9.9658E-07 -4.7590E-06 0.0000E+00 0.0000E+00 S4 -5.3808E-07 -2.6127E-07 -4.6940E-06 -1.2291E-06 0.0000E+00 0.0000E+00 0.0000E+00 S5 -6.4900E-06 2.2377E-06 -2.7519E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 -3.8582E-06 1.1760E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 1.9873E-03 5.9477E-04 -7.4236E-05 -3.6708E-04 4.4395E-05 4.7023E-05 9.0943E-06 S8 2.7875E-03 -1.3432E-03 2.5009E-03 -1.2007E-03 4.3417E-04 -1.3816E-04 6.0205E-06 S9 4.7346E-03 -3.0607E-03 2.5916E-03 -2.0604E-03 1.0202E-03 -2.6743E-04 2.6218E-05 S10 -4.9791E-04 -9.7617E-04 2.7880E-04 -3.1612E-04 2.0276E-04 -3.4467E-05 4.5656E-05

[0121] Table 4

[0122] Figure 13 The on-axis chromatic aberration curve of the optical lens system in Example 2 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the optical lens system. Figure 14 The astigmatism curves of the optical lens system in Example 2 are shown, representing the meridional image plane curvature and the sagittal image plane curvature. Figure 15 The distortion curves of the optical lens system in Example 2 are shown, representing the distortion magnitude values ​​corresponding to different field of view angles. Figure 16 The magnification chromatic aberration curve of the optical lens system in Example 2 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical lens system. Figure 17 The relative illumination curves of the optical lens system in Example 2 are shown, representing the relative illumination values ​​corresponding to different image heights.

[0123] according to Figures 13 to 17 As can be seen, the optical lens system given in Example 2 can achieve good imaging quality.

[0124] Example 3

[0125] like Figures 18 to 25 As shown, an optical lens system of Example 3 of this application is described. Figure 18A schematic diagram of the optical lens system in Example 3 in its first state is shown. Figure 19 A schematic diagram of the optical lens system in Example 3 in the second state is shown. Figure 20 A schematic diagram of the optical lens system of Example 3 in its third state is shown. For the sake of brevity, descriptions similar to those in Example 1 are omitted.

[0126] like Figure 18 As shown, the optical lens system, from the object side to the image side, sequentially includes a first lens E1, a first isolator P1, a second lens E2, a second isolator P2, a second auxiliary isolator P2b, a third lens E3, a third isolator P3, a third auxiliary isolator P3b, a third auxiliary isolator P3c, a fourth lens E4, a fourth isolator P4, and a fifth lens E5. Two isolators are placed between the second and third lenses, and three isolators are placed between the third and fourth lenses. These provide strong support and ensure sufficient bearing space, while also better intercepting stray light and improving image quality.

[0127] like Figure 19 As shown, with Figure 18 The difference is that a second auxiliary isolation member P2c is provided on the image side of the second auxiliary isolation member P2b, while only a third isolation member P3 and a third auxiliary isolation member P3b are provided between the third lens and the fourth lens.

[0128] like Figure 20 As shown, with Figure 18 The difference is that only a third isolator P3 and a third auxiliary isolator P3b are set between the third lens and the fourth lens.

[0129] exist Figure 18 In the middle, the isolation components are all located between two adjacent lenses, and each isolation component abuts against part of the inner wall surface of the lens barrel P0. Specifically, it abuts against the inner wall surface of the lens barrel P0 that is parallel to the optical axis. The first lens E1 to the fifth lens E5 are all spaced apart and do not directly abut against each other.

[0130] exist Figure 19 and Figure 20 In this assembly, the first lens and the second lens are fastened together, and the first isolation member is located inside the fastening structure, which improves the stability of the assembly.

[0131] Table 5 shows the basic structural parameters of the optical lens system in Example 3, where the units for radius of curvature, thickness / distance, and effective focal length are all millimeters (mm).

[0132]

[0133] Table 5

[0134] Table 6 gives the higher-order coefficients of S1-S10 that can be used for each aspherical lens in Example 3. The surface shape of each aspherical lens can be limited by, but is not limited to, the formula (1) in Example 1.

[0135]

[0136]

[0137] Table 6

[0138] Figure 21 The on-axis chromatic aberration curve of the optical lens system in Example 3 is shown, which represents the deviation of the focal point of light of different wavelengths after passing through the optical lens system. Figure 22 The astigmatism curves of the optical lens system in Example 3 are shown, representing the meridional image plane curvature and the sagittal image plane curvature. Figure 23 The distortion curves of the optical lens system in Example 3 are shown, representing the distortion magnitude values ​​corresponding to different field of view angles. Figure 24 The magnification chromatic aberration curve of the optical lens system in Example 3 is shown, which represents the deviation of light at different image heights on the imaging plane after passing through the optical lens system. Figure 25 The relative illumination curves of the optical lens system in Example 3 are shown, representing the relative illumination values ​​corresponding to different image heights.

[0139] according to Figures 21 to 25 As can be seen, the optical lens system given in Example 3 can achieve good imaging quality.

[0140] In summary, Examples 1 to 3 satisfy the relationships shown in Table 7.

[0141]

[0142]

[0143] Table 7

[0144] Table 8 provides some parameters of the optical lens systems in Examples 1 to 3.

[0145] Base data / Examples 1-1 1-2 1-3 2-1 2-2 2-3 3-1 3-2 3-3 d1s 3.0134 3.0381 3.0954 3.0134 3.1106 3.0724 3.0134 3.0736 3.0736 D1s 4.9600 5.0600 3.9607 4.9600 3.9760 3.9760 4.9600 4.0127 4.0127 d2s 2.4774 2.5202 2.5202 2.5146 2.5146 2.5146 2.5146 2.5271 2.5146 D2m 5.0400 5.1400 4.9400 5.0400 5.0400 5.0400 5.0400 4.9800 5.0400 d3s 2.5845 2.6253 2.6253 2.5845 2.5845 2.5845 2.5845 2.5714 2.5845 D3s 5.2600 5.3600 5.1600 5.2600 5.2600 5.2600 5.2600 5.2000 5.2600 d4s 4.4057 4.3899 4.4215 4.4063 4.3697 4.4063 4.3940 4.3940 4.3940 d4m 4.4057 4.3899 4.4215 4.4063 4.3697 4.4063 4.3940 4.3940 4.3940 D4s 5.7800 5.8800 5.8800 5.8355 5.9355 5.8355 5.8355 5.7755 5.8355 D4m 5.7800 5.8800 5.8800 5.8355 5.9355 5.8355 5.8355 5.7755 5.8355 d0s 4.9801 4.9801 4.9801 4.9801 4.9801 4.9801 4.9801 4.9801 4.9801 D0s 5.6062 5.7262 5.7262 5.6062 5.8062 5.8062 5.6062 5.6062 5.6062 D0m 6.7600 6.8800 6.8800 6.7600 6.7600 6.7600 6.7600 6.7600 6.7600 EP01 1.3800 1.3600 1.3143 1.3760 1.3065 1.3365 1.3760 1.3258 1.3258 EP12 0.5600 0.5780 0.6217 0.5600 0.6295 0.5995 0.5400 0.5902 0.5902 CP2 0.0220 0.0220 0.0220 0.0300 0.0300 0.0300 0.0300 0.0300 0.0300 EP23 1.2800 1.3100 1.3100 1.1922 1.1922 1.1922 1.2695 1.2705 1.2705 CP3 0.0300 0.0300 0.0300 0.0300 0.0300 0.0300 0.0300 0.0300 0.0300 EP34 1.4375 1.3975 1.4195 1.5073 1.4773 1.5073 1.3602 1.3602 1.3602 CP4 0.0220 0.0220 0.0220 0.0220 0.0220 0.0220 0.0220 0.0220 0.0220 L 6.5000 6.5000 6.3700 6.5000 6.5000 6.5000 6.5000 6.3500 6.3116 d2bm 3.9266 3.8810 4.0266 3.9266 3.9266 3.9266 3.9266 3.7797 3.9797 D2bm 4.7783 4.9152 4.6783 4.7917 4.7917 4.7917 4.6939 4.7345 4.6939 CP2b 0.6500 0.5780 0.6000 0.6420 0.5820 0.6420 0.7203 0.6603 0.7203 d3bs 4.1783 3.4977 3.2444 3.5140 3.0837 3.5140 3.5140 3.5140 3.5140 D3bm 5.2784 5.3784 5.1784 5.2784 5.2784 5.2784 5.2784 5.2392 5.2992

[0146] Table 8

[0147] It should be noted that in Tables 7 and 8, 1-1 represents the optical lens system in Example 1 in the first state, 1-2 represents the optical lens system in Example 1 in the second state, 1-3 represents the optical lens system in Example 1 in the third state, 2-1 represents the optical lens system in Example 2 in the first state, 2-2 represents the optical lens system in Example 2 in the second state, 2-3 represents the optical lens system in Example 2 in the third state, 3-1 represents the optical lens system in Example 3 in the first state, 3-2 represents the optical lens system in Example 3 in the second state, and 3-3 represents the optical lens system in Example 3 in the third state.

[0148] Table 9 gives the effective focal lengths f1 to f5 of the first to fifth lenses of the optical lens systems in Examples 1 to 3, as well as the effective focal length f and the Semi-FOV (half of the maximum field of view) of the optical lens systems.

[0149] Base data / Examples 1 2 3 Semi-FOV 18.1967 17.6334 17.8980 f (mm) 8.6700 8.6700 8.6700 f1 (mm) 3.5928 3.4986 3.4988 f2 (mm) -8.1233 -7.4565 -7.2799 f3 (mm) -9.4337 -7.7070 -7.8712 f4 (mm) -20.0000 18.2821 9.3721 f5 (mm) 410.1675 -10.8002 -7.1791 f345 (mm) -6.2279 -5.5111 -5.9032

[0150] Table 9

[0151] This application also provides an imaging device, whose electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a stand-alone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical lens system described above.

[0152] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0153] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0154] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0155] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An optical lens system characterized in that, The optical lens system has five lenses with optical power, comprising: Five lenses, the five lenses sequentially comprise a first lens to a fifth lens from an object side to an image side of the optical lens system, the first lens has positive optical power, an object side surface of the first lens is convex, an image side surface of the first lens is convex, the second lens has negative optical power, an object side surface of the second lens is convex, an image side surface of the second lens is concave, the third lens has negative optical power, an object side surface of the third lens is concave, optical powers of the fourth lens and the fifth lens are opposite in sign, an object side surface of the fourth lens is concave, an image side surface of the fourth lens is convex; A plurality of spacers, at least one of the plurality of spacers is a fourth spacer located on an image side of the fourth lens and in contact with the image side surface of the fourth lens; A lens barrel for accommodating the lenses and the spacers; Wherein, an Abbe number V4 of the fourth lens and an Abbe number V5 of the fifth lens satisfy: -40 < V4-V5 ≤ -35.5506; An effective focal length f4 of the fourth lens, an effective focal length f5 of the fifth lens, an inner diameter d4s of an object side surface of the fourth spacer, an outer diameter D4m of an image side surface of the fourth spacer satisfy: -0.0604 ≤ (d4s*D4m) / (f4-f5) ≤ 1.5492; A curvature radius R7 of an object side surface of the fourth lens, a curvature radius R8 of an image side surface of the fourth lens, a thickness CP4 of the fourth spacer, an air interval T45 of the fourth lens and the fifth lens on an optical axis of the optical lens system, a central thickness CT5 of the fifth lens satisfy: -35.5715 ≤ (R7+R8) / (CP4+T45+CT5) ≤ -23.6473.

2. The optical lens system according to claim 1, wherein, The effective focal length f4 of the fourth lens, the inner diameter d4m of the image side surface of the fourth spacer, a refractive index N4 of the fourth lens, a refractive index N5 of the fifth lens satisfy: 6.8514 ≤ |f4 / d4m|*(N4+N5) ≤ 14.6346.

3. The optical lens system according to claim 1, wherein, At least one of the plurality of spacers is a third spacer located on an image side of the third lens and in contact with an image side surface of the third lens, an effective focal length f3 of the third lens, an inner diameter d4s of an object side surface of the fourth spacer, an inner diameter d3s of an object side surface of the third spacer, a distance EP34 from the image side surface of the third spacer to the object side surface of the fourth spacer along the optical axis satisfy: -11.9518 mm ≤ f3*(d4s-d3s) / EP34 ≤ -9.3133 mm.

4. The optical lens system according to claim 1, wherein, A curvature radius R9 of an object side surface of the fifth lens, a curvature radius R10 of an image side surface of the fifth lens, an outer diameter D0m of an image side end surface of the lens barrel, an inner diameter d4m of an image side surface of the fourth spacer satisfy: -0.4571 ≤ (D0m+d4m) / (R9+R10) ≤ 14.9401.

5. The optical lens system according to claim 1, wherein, At least one of the plurality of spacers includes a second spacer located on the image side of the second lens and in contact with the image side surface of the second lens, and a third spacer located on the image side of the third lens and in contact with the image side surface of the third lens, and the effective focal length f2 of the second lens, the distance EP23 from the image side surface of the second spacer to the object side surface of the third spacer along the optical axis, and the air separation T23 of the second lens and the third lens on the optical axis satisfy: -59.7423 ≤ f2 / (EP23-T23) ≤ -33.4828.

6. The optical lens system according to claim 1, wherein, At least one of the plurality of spacers includes a third spacer located on the image side of the third lens and in contact with the image side surface of the third lens, and the radius of curvature R6 of the image side surface of the third lens, the outer diameter D3s of the object side surface of the third spacer, and the inner diameter d3s of the object side surface of the third spacer satisfy: -1.3187 ≤ (D3s+d3s) / R6 ≤ 0.6682.

7. The optical lens system according to claim 1, wherein, At least one of the plurality of spacers includes a second spacer located on the image side of the second lens and in contact with the image side surface of the second lens, and the radius of curvature R5 of the object side surface of the third lens, the radius of curvature R4 of the image side surface of the second lens, the outer diameter D2m of the image side surface of the second spacer, and the inner diameter d2s of the object side surface of the second spacer satisfy: -4.0654 ≤ (R5-R4) / (D2m-d2s) ≤ -2.3548.

8. The optical lens system according to claim 1, wherein, At least one of the plurality of spacers includes a first spacer located on the image side of the first lens and in contact with the image side surface of the first lens, and the effective focal length f1 of the first lens, the outer diameter D0s of the object side end surface of the lens barrel, the inner diameter d0s of the object side end surface of the lens barrel, and the distance EP01 from the object side end surface of the lens barrel to the object side surface of the first spacer along the optical axis satisfy: 26.9166 mm ≤ f1*(D0s+d0s) / EP01 ≤ 29.2670 mm.

9. The optical lens system according to claim 1, wherein, At least one of the plurality of spacers includes a third spacer located on the image side of the third lens and in contact with the image side surface of the third lens, and the combined focal length f345 of the third lens, the fourth lens and the fifth lens, the distance EP34 from the image side surface of the third spacer to the object side surface of the fourth spacer along the optical axis, the thickness CP3 of the third spacer, the thickness CP4 of the fourth spacer, and the air separation T45 of the fourth lens and the fifth lens on the optical axis satisfy: -4.8033 ≤ f345 / (EP34-CP3-CP4-T45) ≤ -3.8664.

10. The optical lens system according to any one of claims 1 to 9, wherein, At least one of the plurality of spacers includes a first spacer located on the image side of the first lens and in contact with the image side surface of the first lens, a second spacer located on the image side of the second lens and in contact with the image side surface of the second lens, and a third spacer located on the image side of the third lens and in contact with the image side surface of the third lens. The Abbe number V1 of the first lens, the inner diameter d1s of the object side surface of the first spacer, the Abbe number V2 of the second lens, the inner diameter d2s of the object side surface of the second spacer, the Abbe number V3 of the third lens, the inner diameter d3s of the object side surface of the third spacer, the distance EP23 between the image side surface of the second spacer and the object side surface of the third spacer along the optical axis, and the distance EP12 between the image side surface of the first spacer and the object side surface of the second spacer along the optical axis satisfy the following relationship: 26.8511 ≤ (V1 / d1s + V2 / d2s + V3 / d3s)*(EP23-EP12) ≤ 35.2335.

11. The optical lens system according to any one of claims 1 to 9, wherein, At least one of the plurality of spacers includes a first spacer located on the image side of the first lens and in contact with the image side surface of the first lens. The radius of curvature R1 of the object side surface of the first lens, the radius of curvature R2 of the image side surface of the second lens, the outer diameter D1s of the object side surface of the first spacer, and the inner diameter d1s of the object side surface of the first spacer satisfy the following relationship: -20.2733 ≤ (R1+R2) / (D1s-d1s) ≤ -5.9681.

12. The optical lens system according to any one of claims 1 to 9, wherein, At least one of the plurality of spacers includes a second spacer located on the image side of the second lens and in contact with the image side surface of the second lens, and a second auxiliary spacer partially in contact with the image side surface of the second spacer. The radius of curvature R5 of the object side surface of the third lens, the outer diameter D2bm of the image side surface of the second auxiliary spacer, and the inner diameter d2bm of the image side surface of the second auxiliary spacer satisfy the following relationship: -9.5552 ≤ R5 / (D2bm-d2bm) ≤ -2.6372. The effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the thickness CP2 of the second spacer, and the thickness CP2b of the second auxiliary spacer satisfy the following relationship: -29.2617 ≤ (f2+f3) / (CP2+CP2b) ≤ -20.1934.

13. The optical lens system according to any one of claims 1 to 9, wherein, At least one of the plurality of spacers includes a third spacer located on the image side of the third lens and in contact with the image side surface of the third lens, and a third auxiliary spacer partially in contact with the image side surface of the third spacer. The outer diameter D3bm of the image side surface of the third auxiliary spacer, the inner diameter d3bs of the object side surface of the third auxiliary spacer, the radius of curvature R5 of the object side surface of the third lens, and the radius of curvature R7 of the object side surface of the fourth lens satisfy the following relationship: 1.3787 ≤ (D3bm+d3bs) / (R5-R7) ≤ 5.2801.

14. The optical lens system according to any one of claims 1 to 9, wherein, At least one of the multiple isolation members includes a first isolation member located on the image side of the first lens and in contact with the image side surface of the first lens, a second isolation member located on the image side of the second lens and in contact with the image side surface of the second lens, and a third isolation member located on the image side of the third lens and in contact with the image side surface of the third lens, and the inner diameter d1s of the object side surface of the first isolation member and the inner diameter d2s of the object side surface of the second isolation member satisfy 1.1984≤d1s / d2s≤1.2370, and the inner diameter d3s of the object side surface of the third isolation member and the inner diameter d4s of the object side surface of the fourth isolation member satisfy 0.5852≤d3s / d4s≤0.5980.

15. The optical lens system according to any one of claims 1 to 9, wherein, At least one of the multiple isolation members includes a third isolation member located on the image side of the third lens and in contact with the image side surface of the third lens, and the air interval of the third lens and the fourth lens on the optical axis is the largest among air intervals of all adjacent two pieces of the lenses on the optical axis, and the effective focal length f3 of the third lens, the effective focal length f4 of the fourth lens, the distance EP34 from the image side surface of the third isolation member to the object side surface of the fourth isolation member along the optical axis, the central thickness CT3 of the third lens on the optical axis, and the central thickness CT4 of the fourth lens on the optical axis satisfy 4.1051≤|f3-f4| / (EP34-CT3+T34-CT4)≤10.3935.

16. The optical lens system according to any one of claims 1 to 9, wherein, At least one of the multiple isolation members includes a third isolation member located on the image side of the third lens and in contact with the image side surface of the third lens, a third auxiliary isolation member partially in contact with the image side surface of the third isolation member, and a third secondary auxiliary isolation member partially in contact with the image side surface of the third auxiliary isolation member.

17. The optical lens system according to any one of claims 1 to 9, wherein, At least one of the multiple isolation members includes a second isolation member located on the image side of the second lens and in contact with the image side surface of the second lens, a second auxiliary isolation member partially in contact with the image side surface of the second isolation member, and a second secondary auxiliary isolation member partially in contact with the image side surface of the second auxiliary isolation member.

18. The optical lens system according to any one of claims 1 to 9, wherein, The outer diameter D4s of the object side surface of the fourth isolation member, the inner diameter d4m of the image side surface of the fourth isolation member, the vertical distance Yc51 of the critical point of the object side surface of the fifth lens from the optical axis, and the vertical distance Yc41 of the critical point of the object side surface of the fourth lens from the optical axis satisfy 11.5715≤(D4s-d4m) / (Yc51-Yc41)≤30.4737, and the inner diameter d4m of the image side surface of the fourth isolation member and the vertical distance Yc51 of the critical point of the object side surface of the fifth lens from the optical axis satisfy 2.0733≤d4m / Yc51≤2.1173.

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