Optical imaging device

Abstract

The invention provides an optical imaging apparatus. The optical imaging device comprises a lens barrel, a lens group and a plurality of spacing elements, the lens group and the spacing elements are arranged in the lens barrel, the lens group is composed of six lenses, and the lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged in the optical axis direction of the optical imaging device from the object side to the image side. The optical imaging device satisfies: 25.20 lt; (R1 + R2) / (R1-R2) < = 58.75; 2.25 lt, 2.25 lt; d1s / R2lt; 3.15, 3.15; 1.20 lt, 1.20 lt; (EP01-T12) / CT1 is smaller than or equal to 1.60. The optical imaging device solves the problem that the optical imaging device in the prior art is easy to cause deformation of the front-end lens under high-temperature and high-humidity conditions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical imaging devices, in particular to an optical imaging device. BACKGROUND

[0002] In today's society, smartphones have become an indispensable part of people's daily life, and the functions of optical imaging devices for smartphones are increasingly powerful. With the progress of mobile device technology and the driving of market trends, smartphones are developing towards higher performance, so the imaging stability of optical imaging devices has become a key indicator of user experience and product competitiveness.

[0003] At present, the design of the radius of curvature of the front lens of the optical imaging device is particularly critical, especially in the case of a large degree of bending of the front lens, the sensitivity of the front lens is high, and during high temperature and high humidity testing, the stress distribution of the front lens is uneven, resulting in serious deformation of the front lens, which has a greater impact on the optical performance and reduces the imaging stability of the optical imaging device.

[0004] That is, the optical imaging device in the prior art has the problem that high temperature and high humidity conditions easily cause the front lens to deform. SUMMARY

[0005] The main purpose of the present application is to provide an optical imaging device to solve the problem that the optical imaging device in the prior art has the problem that high temperature and high humidity conditions easily cause the front lens to deform.

[0006] In order to achieve the above object, according to one aspect of the present application, there is provided an optical imaging device, comprising a lens barrel, and a lens group and a plurality of spacer elements arranged in the lens barrel, the lens group consisting of six lenses, the lens group comprising, in order from an object side to an image side along an optical axis direction of the optical imaging device, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, the first lens having a positive refractive power, an object side surface of the first lens being a convex surface, and an image side surface of the first lens being a concave surface; the plurality of spacer elements comprising at least a first spacer element and a second spacer element, the first spacer element being located between the first lens and the second lens and partially contacting the image side surface of the first lens, and the second spacer element being located between the second lens and the third lens and partially contacting the image side surface of the second lens; a radius of curvature R1 of the object side surface of the first lens and a radius of curvature R2 of the image side surface of the first lens satisfy: 25.20 < (R1+R2) / (R1-R2) ≤ 58.75; an outer diameter D1s of an object side surface of the first spacer element and the radius of curvature R2 of the image side surface of the first lens satisfy: 2.25 < D1s / R2 < 3.15; and an interval distance EP01 of the object side end surface of the lens barrel and the object side surface of the first spacer element along the optical axis direction, an air interval T12 of the image side surface of the first lens and an object side surface of the second lens on the optical axis of the optical imaging device, and a central thickness CT1 of the first lens on the optical axis satisfy: 1.20 < (EP01-T12) / CT1 ≤ 1.60.

[0007] According to another aspect of the present application, there is provided an optical imaging device, comprising a lens barrel, and a lens group and a plurality of spacer elements arranged in the lens barrel, the lens group consisting of six lenses, the lens group comprising, in order from an object side to an image side along an optical axis direction of the optical imaging device, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, the first lens having a positive refractive power, an object side surface of the first lens being a convex surface, and an image side surface of the first lens being a concave surface; the plurality of spacer elements comprising at least a first spacer element and a second spacer element, the first spacer element being located between the first lens and the second lens and partially contacting the image side surface of the first lens, and the second spacer element being located between the second lens and the third lens and partially contacting the image side surface of the second lens; a radius of curvature R1 of the object side surface of the first lens and a radius of curvature R2 of the image side surface of the first lens satisfy: 25.20 < (R1+R2) / (R1-R2) ≤ 58.75; an outer diameter D1s of an object side surface of the first spacer element and the radius of curvature R2 of the image side surface of the first lens satisfy: 2.25 < D1s / R2 < 3.15; and an interval distance EP01 of the object side end surface of the lens barrel and the object side surface of the first spacer element along the optical axis direction, and the radius of curvature R1 of the object side surface of the first lens satisfy: 0.45 ≤ EP01 / R1 ≤ 0.50.

[0008] Further, the outer diameter D1s of the object side surface of the first spacer element and the inner diameter d1s of the object side surface of the first spacer element satisfy 1.55 < D1s / d1s < 2.25.

[0009] Further, the inner diameter d2s of the object side surface of the second spacer element and the radius of curvature R3 of the object side surface of the second lens satisfy 1.20 < d2s / R3 < 2.00.

[0010] Further, the combined focal length f12 of the first lens and the second lens, the inner diameter d1s of the object side surface of the first spacer element, and the inner diameter d2s of the object side surface of the second spacer element satisfy 1.70 < |f12| / (d1s+d2s) < 8.10.

[0011] Further, the inner diameter d0s of the object side end surface of the lens barrel and the radius of curvature R1 of the object side surface of the first lens satisfy 1.70 < d0s / R1 < 2.50.

[0012] Further, the inner diameter d2s of the object side surface of the second spacer element and the central thickness CT2 of the second lens on the optical axis satisfy 6.50 < d2s / CT2 < 10.50.

[0013] Further, the air separation T34 of the third lens and the fourth lens on the optical axis, and the on-axis displacement SAG41 between the intersection of the object side surface of the fourth lens and the optical axis and the effective radius vertex of the object side surface of the fourth lens satisfy 1.75 < T34 / |SAG41| < 2.45.

[0014] Further, the plurality of spacer elements further include a third spacer element, the third spacer element being located between the third lens and the fourth lens and being in contact with the image side surface portion of the third lens, the separation distance EP23 of the image side surface of the second spacer element and the object side surface of the third spacer element along the optical axis direction, and the air separation T23 of the image side surface of the second lens and the object side surface of the third lens on the optical axis satisfy 3.80 < EP23 / T23 < 6.25.

[0015] Further, the plurality of spacer elements further include a fourth spacer element and a fifth spacer element, the fourth spacer element being located between the fourth lens and the fifth lens and being in contact with the image side surface of the fourth lens, the fifth spacer element being located between the fifth lens and the sixth lens and being in contact with the image side surface of the fifth lens, the separation distance EP45 of the image side surface of the fourth spacer element and the object side surface of the fifth spacer element along the optical axis direction, and the central thickness CT4 of the fourth lens on the optical axis satisfy 0.85 < EP45 / CT4 < 1.25.

[0016] Further, the plurality of spacer members further includes a fifth spacer member located between the fifth lens and the sixth lens and in contact with the image side surface portion of the fifth lens, and an outer diameter D5s of the object side surface of the fifth spacer member, an inner diameter d5s of the object side surface of the fifth spacer member, and a distance Yc52 from the inflection point on the effective diameter of the image side surface of the fifth lens to the optical axis satisfy: 0.40 < (D5s - d5s) / Yc52 < 1.50.

[0017] Further, the plurality of spacer members further includes a fourth spacer member and a fifth spacer member, the fourth spacer member is located between the fourth lens and the fifth lens and in contact with the image side surface portion of the fourth lens, and the fifth spacer member is located between the fifth lens and the sixth lens and in contact with the image side surface portion of the fifth lens, and an effective focal length f5 of the fifth lens, an inner diameter d4m of the image side surface of the fourth spacer member, and an inner diameter d5s of the object side surface of the fifth spacer member satisfy: 1.90 < f5 / d4m < 3.15 and 1.35 < f5 / d5s < 2.55.

[0018] Further, the plurality of spacer members further includes a third spacer member located between the third lens and the fourth lens and in contact with the image side surface portion of the third lens, and a radius of curvature R5 of the object side surface of the third lens, a refractive index N3 of the third lens, an outer diameter D3m of the image side surface of the third spacer member, and an inner diameter d3m of the image side surface of the third spacer member satisfy: 6.90 < R5 x N3 / (D3m - d3m) < 23.80.

[0019] Further, the plurality of spacer members further includes a third spacer member, a fourth spacer member, and a fifth spacer member, the third spacer member is located between the third lens and the fourth lens and in contact with the image side surface portion of the third lens, the fourth spacer member is located between the fourth lens and the fifth lens and in contact with the image side surface portion of the fourth lens, and the fifth spacer member is located between the fifth lens and the sixth lens and in contact with the image side surface portion of the fifth lens, and a combined focal length f45 of the fourth lens and the fifth lens, a separation distance EP34 of the image side surface of the third spacer member and the object side surface of the fourth spacer member along the optical axis direction, and a separation distance EP45 of the image side surface of the fourth spacer member and the object side surface of the fifth spacer member along the optical axis direction satisfy: 7.05 < f45 / EP34 < 14.90 and 8.20 < f45 / EP45 < 18.95.

[0020] Further, the plurality of spacer elements further includes a third spacer element located between the third lens and the fourth lens and in contact with the image side surface portion of the third lens, an outer diameter D3s of the object side surface of the third spacer element, an inner diameter d3s of the object side surface of the third spacer element, an on-axis displacement SAG41 between an intersection of the object side surface of the fourth lens and the optical axis and an effective radius vertex of the object side surface of the fourth lens satisfy: 1.65 < (D3s-d3s) / |SAG41| ≤ 5.60.

[0021] Further, the plurality of spacer elements further includes a third spacer element located between the third lens and the fourth lens and in contact with the image side surface portion of the third lens, an outer diameter D3s of the object side surface of the third spacer element, a central thickness CT3 of the third lens on the optical axis satisfy: 4.60 < D3s / CT3 < 5.95.

[0022] The optical imaging device includes a lens barrel, a lens group and a plurality of spacer elements arranged in the lens barrel, the lens group is composed of six lenses, the lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence along an optical axis direction of the optical imaging device from an object side to an image side, the first lens has a positive focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the plurality of spacer elements includes at least a first spacer element and a second spacer element, the first spacer element is located between the first lens and the second lens and in contact with the image side surface portion of the first lens, and the second spacer element is located between the second lens and the third lens and in contact with the image side surface portion of the second lens; a radius of curvature R1 of the object side surface of the first lens and a radius of curvature R2 of the image side surface of the first lens satisfy: 25.20 < (R1+R2) / (R1-R2) ≤ 58.75; an outer diameter D1s of the object side surface of the first spacer element and the radius of curvature R2 of the image side surface of the first lens satisfy: 2.25 < D1s / R2 < 3.15; a separation distance EP01 of the object side end surface of the lens barrel and the object side surface of the first spacer element along the optical axis direction, an air separation T12 of the image side surface of the first lens and the object side surface of the second lens on the optical axis of the optical imaging device, and a central thickness CT1 of the first lens on the optical axis satisfy: 1.20 < (EP01-T12) / CT1 ≤ 1.60.

[0023] The optical imaging device of the present application consists of a lens barrel, six lenses and at least two spacer elements, and satisfies 25.20 < (R1 + R2) / (R1 - R2) ≤ 58.75 and 2.25 < D1s / R2 < 3.15. It can be seen that the curvature radii of the object side and the image side of the first lens are relatively close. At the same time, the numerical values of the curvature radius R1 of the object side of the first lens and the curvature radius R2 of the image side of the first lens are both small, making the sensitivity of the first lens relatively high. During the high-temperature and high-humidity test, the first lens is subjected to the squeezing force from the inner wall surface of the lens barrel and the direction parallel to the optical axis. Especially when the first lens is a meniscus lens with a convex-concave shape, when the sensitivity of the first lens is high and the degree of bending is large, the deformation of the first lens has a greater impact on the optical performance. Based on this, by restricting the relationship between the axial distance EP01 between the object-side end face of the lens barrel and the object side of the first spacer element, the air gap T12 on the optical axis between the image side of the first lens and the object side of the second lens, and the central thickness CT1 of the first lens on the optical axis, the stress distribution of the first lens is relatively reasonable during the high-temperature and high-humidity test, and the maximum stress of the first lens is within a reasonable range. While ensuring the bearing force of the lens barrel on the first lens and the structural strength of the first lens, the deformation amount of the first lens is reduced to ensure the stability of the optical performance. That is to say, by restricting (EP01 - T12) / CT1 within a reasonable range, the optical imaging device of the present application can reduce the deformation amount of the first lens and ensure the stability of the optical performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0025] Figure 1 It shows a dimension marking diagram of the optical imaging device of an optional embodiment of the present invention;

[0026] Figure 2 It shows a partial structural schematic diagram of the optical imaging device of Embodiment 1-1 of the present invention;

[0027] Figure 3 It shows a partial structural schematic diagram of the optical imaging device of Embodiment 1-2 of the present invention;

[0028] Figure 4 It shows a partial structural schematic diagram of the optical imaging device of Embodiment 1-3 of the present invention;

[0029] Figure 5 It shows the axial chromatic aberration curve of the optical imaging device of Embodiment 1 of the present invention;

[0030] Figure 6Astigmatism curve of the optical imaging device of the embodiment one of the present application is shown;

[0031] Figure 7 Distortion curve of the optical imaging device of the embodiment one of the present application is shown;

[0032] Figure 8 Lateral chromatic aberration curve of the optical imaging device of the embodiment one of the present application is shown;

[0033] Figure 9 Partial structure diagram of the optical imaging device of the embodiment 2-1 of the present application is shown;

[0034] Figure 10 Partial structure diagram of the optical imaging device of the embodiment 2-2 of the present application is shown;

[0035] Figure 11 Partial structure diagram of the optical imaging device of the embodiment 2-3 of the present application is shown;

[0036] Figure 12 Axial chromatic aberration curve of the optical imaging device of the embodiment two of the present application is shown;

[0037] Figure 13 Astigmatism curve of the optical imaging device of the embodiment two of the present application is shown;

[0038] Figure 14 Distortion curve of the optical imaging device of the embodiment two of the present application is shown;

[0039] Figure 15 Lateral chromatic aberration curve of the optical imaging device of the embodiment two of the present application is shown;

[0040] Figure 16 Partial structure diagram of the optical imaging device of the embodiment 3-1 of the present application is shown;

[0041] Figure 17 Partial structure diagram of the optical imaging device of the embodiment 3-2 of the present application is shown;

[0042] Figure 18 Partial structure diagram of the optical imaging device of the embodiment 3-3 of the present application is shown;

[0043] Figure 19 Axial chromatic aberration curve of the optical imaging device of the embodiment three of the present application is shown;

[0044] Figure 20 Astigmatism curve of the optical imaging device of the embodiment three of the present application is shown;

[0045] Figure 21A distortion curve of the optical imaging device of the third embodiment of the present application is shown;

[0046] Figure 22 A lateral chromatic aberration curve of the optical imaging device of the third embodiment of the present application is shown;

[0047] Figure 23 An assembly deformation diagram of an optical imaging device satisfying (R1+R2) / (R1-R2)=54.64, D1s / R2=2.30 and (EP01-T12) / CT1=1.35 of an optional embodiment of the present application is shown;

[0048] Figure 24 An assembly deformation diagram of an optical imaging device satisfying (R1+R2) / (R1-R2)=54.64, D1s / R2=2.30 and (EP01-T12) / CT1=0.97 of an example is shown;

[0049] Figure 25 An assembly deformation diagram of an optical imaging device satisfying (R1+R2) / (R1-R2)=54.64, D1s / R2=2.30 and (EP01-T12) / CT1=1.70 of another example is shown.

[0050] Wherein, the above figures include the following reference signs:

[0051] P0, lens barrel; E1, first lens; P1, first spacer element; E2, second lens; P2, second spacer element; E3, third lens; P3, third spacer element; E4, fourth lens; P4, fourth spacer element; E5, fifth lens; P5, fifth spacer element; E6, sixth lens; P6, sixth spacer element; S1, object side surface of the first lens; S2, image side surface of the first lens; S3, object side surface of the second lens; S4, image side surface of the second lens; S5, object side surface of the third lens; S6, image side surface of the third lens; S7, object side surface of the fourth lens; S8, image side surface of the fourth lens; S9, object side surface of the fifth lens; S10, image side surface of the fifth lens; S11, object side surface of the sixth lens; S12, image side surface of the sixth lens. DETAILED DESCRIPTION

[0052] It should be noted that the embodiments and the features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0053] It should be noted that all the technical and scientific terms used in the present application have the same meaning as that generally understood by the ordinary skilled in the art to which the present application belongs, unless otherwise specified.

[0054] In the present application, the orientation words such as "upper", "lower", "top", "bottom" are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions of the components themselves, unless otherwise specified; similarly, for the convenience of understanding and description, "inner" and "outer" refer to the inner and outer relative to the contour of the components themselves, but the above orientation words are not used to limit the present application.

[0055] It should be noted that the terms first, second, third, etc. in the present description are only used to distinguish one feature from another, and do not represent any limitation on the features. Therefore, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0056] In the drawings, the thickness, size and shape of the lens have been slightly exaggerated for the convenience of illustration. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely examples and are not strictly drawn to scale.

[0057] In this context, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not specified, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not specified, it means that the lens surface is concave at least in the paraxial region. The judgment of the surface shape in the paraxial region can be based on the judgment method of those skilled in the art, with R value (R refers to the radius of curvature in the paraxial region, usually refers to the R value on the lens data in the optical software) to judge the convexity and concavity. In terms of the object side, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; in terms of the image side, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex. In the present application, the left side is the object side and the right side is the image side.

[0058] In order to solve the problem that the existing optical imaging device is prone to deformation of the front lens under high temperature and high humidity conditions, the present application provides an optical imaging device.

[0059] As Figures 1 to 23As shown, the optical imaging device includes a lens barrel, and a lens group and a plurality of spacer elements arranged in the lens barrel, the lens group is composed of six lenses, the lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence along the optical axis direction of the optical imaging device from the object side to the image side, the first lens has positive focal power, the object side surface of the first lens is convex, and the image side surface of the first lens is concave; the plurality of spacer elements at least includes a first spacer element and a second spacer element, the first spacer element is located between the first lens and the second lens and partially contacts the image side surface of the first lens, and the second spacer element is located between the second lens and the third lens and partially contacts the image side surface of the second lens; the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens satisfy: 25.20<(R1+R2) / (R1-R2)≤58.75; the outer diameter D1s of the object side surface of the first spacer element and the curvature radius R2 of the image side surface of the first lens satisfy: 2.25<D1s / R2<3.15; the interval distance EP01 of the object side end surface of the lens barrel and the object side surface of the first spacer element along the optical axis direction, the air interval T12 of the image side surface of the first lens and the object side surface of the second lens on the optical axis of the optical imaging device, and the central thickness CT1 of the first lens on the optical axis satisfy: 1.20<(EP01-T12) / CT1≤1.60.

[0060] The optical imaging device of the present application is composed of a lens barrel, six lenses and at least two spacer elements, and satisfies 25.20<(R1+R2) / (R1-R2)≤58.75 and 2.25<D1s / R2<3.15, so it can be seen that the curvature radii of the object side surface and the image side surface of the first lens are relatively close, and the curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens are both relatively small, so that the sensitivity of the first lens is relatively high. In the high temperature and high humidity test, the first lens is subjected to the extrusion force of the inner wall surface of the lens barrel and the direction parallel to the optical axis, especially when the first lens is a convex-concave shaped meniscus lens, the sensitivity of the first lens is high, and the degree of bending is large, so that the first lens is deformed and has a great influence on the optical performance. Based on this, by restricting the relationship between the interval distance EP01 of the object side end surface of the lens barrel and the object side surface of the first spacer element along the optical axis direction, the air interval T12 of the image side surface of the first lens and the object side surface of the second lens on the optical axis, and the central thickness CT1 of the first lens on the optical axis, the stress distribution of the first lens is reasonable in the high temperature and high humidity test, and the maximum stress of the first lens is within a reasonable range. While ensuring the bearing force of the lens barrel on the first lens and the structural strength of the first lens, the deformation amount of the first lens is reduced to ensure the stability of the optical performance. That is, by restricting (EP01-T12) / CT1 within a reasonable range, the optical imaging device of the present application can reduce the deformation amount of the first lens and ensure the stability of the optical performance.

[0061] Further, referring to Figures 23 to 25 shown, the optical imaging device satisfies 25.20 < (R1+R2) / (R1-R2) ≤ 58.75 and 2.25 < D1s / R2 < 3.15, for example, (R1+R2) / (R1-R2) = 54.64, D1s / R2 = 2.30, Figure 23 An assembly deformation diagram of an optical imaging device of one optional embodiment of the present application is shown, and specifically, the optical imaging device in this embodiment satisfies (EP01-T12) / CT1 = 1.35, which is hereinafter referred to as Scheme 1. Figure 24 An assembly deformation diagram of an optical imaging device of one example is shown, and specifically, the optical imaging device in this example satisfies (EP01-T12) / CT1 = 0.97, which is hereinafter referred to as Example 1. Figure 25 An assembly deformation diagram of an optical imaging device of another example is shown, and specifically, the optical imaging device in this example satisfies (EP01-T12) / CT1 = 1.70, which is hereinafter referred to as Example 2.

[0062] As Figure 23 shown, the deformation amount of the center position of the first lens in the optical imaging device is the largest, and the maximum deformation amount of the first lens is 0.0035986 mm. It can be known that when the optical imaging device satisfies (EP01-T12) / CT1 = 1.35, the abutting structure at the front end of the optical imaging device is more reasonable, and in the high-temperature and high-humidity test environment, the first lens is subjected to smaller extrusion force from the lens barrel and the first spacer element, and the deformation amount generated by the first lens is smaller, which indicates that the optical imaging device of Scheme 1 performs better.

[0063] As Figure 24 shown, the deformation amount of the center position of the first lens in the optical imaging device is the largest, and the maximum deformation amount of the first lens is 0.0075514 mm. It can be known that when the optical imaging device satisfies (EP01-T12) / CT1 = 0.97, EP01 is smaller at this time, the thickness of the non-effective diameter region of the first lens is smaller than that of Scheme 1, which leads to weaker pressure bearing capacity of the non-effective diameter region of the first lens and easier deformation of the first lens under the extrusion of the second lens. Furthermore, in the high-temperature and high-humidity test environment, the first lens is subjected to larger extrusion force from the lens barrel and the second lens, and the deformation amount generated by the center position of the first lens increases, which indicates that the optical imaging device of Example 1 performs worse.

[0064] As Figure 25As shown, the deformation amount at the center position of the first lens in the optical imaging device is the largest, and the maximum deformation amount of the first lens is 0.007683 mm. It can be seen that when the optical imaging device satisfies (EP01 - T12) / CT1 = 1.70, at this time, EP01 is relatively large, the thickness of the non-effective diameter region of the first lens increases compared to Solution 1, and the pressure-bearing capacity of the non-effective diameter region of the first lens increases. However, due to the increase in thickness, the cumulative deformation amount of itself is larger, and it is more likely to transfer the inward pressure to the center position of the first lens. Therefore, in a high-temperature and high-humidity test environment, after the non-effective diameter region of the first lens expands, the inward pressure from the lens barrel is greater, and these pressures further cause a large deformation amount at the center position of the first lens, indicating that the optical imaging device in Example 2 performs poorly.

[0065] It should be noted that Figures 23 to 25 in, the left diagram shows the deformation amount, and the unit is millimeter.

[0066] In summary, from Figures 23 to 25 it can be seen that when the optical imaging device satisfies 25.20 < (R'sub1' + R'sub2') / (R'sub1' - R'sub2') ≤ 58.75 and 2.25 < D'sub1s' / R'sub2' < 3.15 and ensures that (EP01 - T'sub12') / CT'sub1' is within the range of 1.24 to 1.60, the bearing structure at the front end of the optical imaging device is reasonable. In a high-temperature and high-humidity test environment, the squeezing force on the first lens from the lens barrel and the first spacer element is the smallest, the deformation amount generated by the first lens is the smallest, and the optical performance is the most stable. Therefore, in this application, by restricting (R'sub1' + R'sub2') / (R'sub1' - R'sub2'), D'sub1s' / R'sub2' and (EP01 - T'sub12') / CT'sub1' within a reasonable range, the stress distribution of the first lens in a high-temperature and high-humidity test is relatively reasonable, the maximum stress of the first lens is within a reasonable range, while ensuring the bearing force of the lens barrel on the first lens and the structural strength of the first lens, the deformation amount of the first lens is reduced to ensure the stability of the optical performance. That is to say, the optical imaging device of this application can reduce the deformation amount of the first lens and ensure the stability of the optical performance by restricting (EP01 - T'sub12') / CT'sub1' within a reasonable range.

[0067] It should be noted that some of the subscript notations in the original text seem to be in a non-standard format. I have tried my best to translate them as accurately as possible while maintaining the overall context. If there are specific requirements or corrections regarding these notations, please let me know.It should be noted that the present application restricts (EP01-T12) / CT1 within a reasonable range, which can effectively improve the reliability of the first lens, and does not depend on the optical power and surface shape of other lenses, and the optical power and surface shape of other lenses are further optimized on the basis of the optical imaging device. Each of the other lenses can be positive or negative according to the actual design requirements of the optical imaging device, and the surface shape of each lens can be convex or concave according to the design requirements of the optical imaging device. The optical imaging device satisfies: 25.20<(R1+R2) / (R1-R2)≤58.75; 2.25<D1s / R2<3.15; 1.20<(EP01-T12) / CT1≤1.60, which can ensure the stability of the optical performance of the first lens.

[0068] For example, in some optional embodiments, the first lens has a positive optical power, which can effectively converge light rays and ensure that the light rays form a preliminary focus after entering the first lens. For another example, in some optional embodiments, the second lens has a positive optical power, which further enhances the convergence effect of the light rays and cooperates with the first lens to achieve efficient focusing of the light rays. For another example, in some optional embodiments, the third lens has a positive optical power, which is conducive to correcting high-order aberrations and improving the detail performance of the imaging edge. For another example, in some optional embodiments, the fifth lens has a positive optical power, which can adjust the focusing position and effectively control the position of the imaging surface. For another example, in some optional embodiments, the sixth lens has a negative optical power, which balances the aberrations caused by the front group of lenses to accurately image the light rays. For another example, in some optional embodiments, the object side surface of the first lens is convex, and the image side surface of the first lens is concave. The object side surface of the second lens is convex, and the image side surface of the second lens is concave. The object side surface of the third lens is convex, and the image side surface of the third lens is convex. The object side surface of the fourth lens is convex. The object side surface of the fifth lens is convex, and the image side surface of the fifth lens is concave. The object side surface of the sixth lens is convex, and the image side surface of the sixth lens is concave. By reasonably restricting the surface shape of each lens, it is conducive to reasonably restricting the light ray trend and ensuring smooth transition of the light rays, which is conducive to correcting aberrations.

[0069] In some optional embodiments, the outer diameter D1s of the object side surface of the first spacer element and the inner diameter d1s of the object side surface of the first spacer element satisfy: 1.55<D1s / d1s<2.25. Reasonably controlling the ratio of D1s / d1s can not only ensure that the size of the first spacer element is appropriate and facilitate the processing of the first spacer element, but also effectively manage the amount of light passing through, ensure that sufficient light enters the optical imaging device, and at the same time enable the first spacer element to effectively intercept reflected and scattered stray light, thereby improving the imaging quality of the optical imaging device.

[0070] In some optional embodiments, the inner diameter d2s of the object side surface of the second spacer element and the radius of curvature R3 of the object side surface of the second lens satisfy: 1.20 < d2s / R3 < 2.00. By controlling d2s / R3 to be within a reasonable range, the radius of curvature of the object side surface of the second lens is matched with the size of the second spacer element, effectively avoiding interference and light path obstruction problems caused during assembly, and at the same time, unnecessary stray light can be intercepted by the second spacer element, avoiding stray light from entering the third lens, thereby significantly improving the overall imaging quality of the optical imaging device.

[0071] In some optional embodiments, the combined focal length f12 of the first lens and the second lens, the inner diameter d1s of the object side surface of the first spacer element, and the inner diameter d2s of the object side surface of the second spacer element satisfy: 1.70 < |f12| / (d1s+d2s) < 8.10. By controlling the value of |f12| / (d1s+d2s) to be within a reasonable range, the ratio of the combined focal length of the first lens and the second lens to the sum of the inner diameters of the object side surfaces of the first spacer element and the second spacer element can be optimized, ensuring that the propagation path of light between the first lens and the second lens is reasonable, thereby effectively adjusting the length of the light path along the optical axis, avoiding the degradation of optical performance caused by excessively long or short light path length, and at the same time, the first spacer element and the second spacer element can intercept stray light, reducing unnecessary stray light and improving the imaging quality of the optical imaging device.

[0072] In some optional embodiments, the inner diameter d0s of the object side end surface of the lens barrel and the radius of curvature R1 of the object side surface of the first lens satisfy: 1.70 < d0s / R1 < 2.50. When d0s / R1 is within the range of 1.74 to 2.46, the bearing area of the lens barrel and the first lens can be appropriately maintained, the incidence angle of light on the object side surface of the first lens can be optimized, and at the same time, the propagation path of light when entering the optical imaging device is more reasonable, reducing unnecessary deflection and scattering of light, thereby ensuring the imaging quality of the optical imaging device.

[0073] In some optional embodiments, the inner diameter d2s of the object side surface of the second spacer element and the center thickness CT2 of the second lens on the optical axis satisfy: 6.50 < d2s / CT2 < 10.50. By controlling d2s / CT2 to be within a reasonable range, the ratio of the inner diameter of the object side surface of the second spacer element to the center thickness of the second lens on the optical axis is constrained, which not only ensures that the effective light can pass through the second spacer element smoothly, but also improves the bearing stability of the second spacer element and the second lens, preventing the second lens from being displaced or deformed when subjected to external force or environmental changes (such as temperature changes), in addition, constraining the thickness of the second lens improves the processing feasibility and optical performance of the second lens, ensuring the compactness and assembly feasibility of the structure of the optical imaging device.

[0074] In some optional embodiments, the third lens and the fourth lens satisfy: 1.75 < T34 / |SAG41| < 2.45, where T34 is the air separation between the third lens and the fourth lens on the optical axis, and SAG41 is the on-axis displacement between the intersection of the object side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object side surface of the fourth lens. SAG41 reflects the degree of curvature of the object side surface of the fourth lens, which directly affects the size of T34, and T34 is crucial to the propagation path of the light rays between the third lens and the fourth lens. Therefore, by controlling T34 / |SAG41| within a reasonable range, the degree of curvature of the fourth lens can be adjusted, the air separation between the third lens and the fourth lens is limited, and the curvature and position of the third lens and the fourth lens are matched, so as to optimize the propagation path of the light path and avoid the decline of the optical performance due to the poor cooperation of the third lens and the fourth lens.

[0075] It should be noted that SAG41 specifically refers to the displacement between the intersection of the object side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object side surface of the fourth lens along the optical axis. That is, the on-axis displacement refers to the displacement along the optical axis.

[0076] In some optional embodiments, the plurality of spacer elements further includes a third spacer element, the third spacer element is located between the third lens and the fourth lens and in contact with the image side surface portion of the third lens, the image side surface of the second spacer element and the object side surface of the third spacer element are spaced apart along the optical axis by a distance EP23, and the air separation T23 between the image side surface of the second lens and the object side surface of the third lens on the optical axis satisfies: 3.80 < EP23 / T23 < 6.25. By controlling EP23 / T23 within a reasonable range, the spacing between the second lens and the third lens is constrained, thereby optimizing the propagation path of the light rays between the second lens and the third lens, which is helpful for correcting aberration, and at the same time, the structural strength of the second spacer element, the third spacer element and the third lens can be ensured, the stability of the abutment between the second spacer element, the third spacer element and the third lens is ensured, and deformation or damage caused by external force or vibration is avoided.

[0077] In some optional embodiments, the plurality of spacer elements further comprises a fourth spacer element and a fifth spacer element, the fourth spacer element is located between the fourth lens and the fifth lens and in contact with the image-side surface portion of the fourth lens, the fifth spacer element is located between the fifth lens and the sixth lens and in contact with the image-side surface portion of the fifth lens, and a spacing distance EP45 between an image-side surface of the fourth spacer element and an object-side surface of the fifth spacer element along the optical axis direction and a central thickness CT4 of the fourth lens on the optical axis satisfy: 0.85 < EP45 / CT4 < 1.25. By controlling EP45 / CT4 within a reasonable range, the assembly stability of the fourth spacer element, the fifth spacer element, and the fourth lens can be effectively improved while ensuring the uniformity of the surface shape of the fourth lens, preventing deformation or misalignment of the fourth lens caused by unreasonable spacing, and thus ensuring that the optical imaging device meets the optical requirements and has good mechanical strength in actual application.

[0078] In some optional embodiments, the plurality of spacer elements further comprises a fifth spacer element, the fifth spacer element is located between the fifth lens and the sixth lens and in contact with the image-side surface portion of the fifth lens, and an outer diameter D5s of the object-side surface of the fifth spacer element, an inner diameter d5s of the object-side surface of the fifth spacer element, and a distance Yc52 between an inflection point of the effective diameter of the image-side surface of the fifth lens away from the optical axis and the optical axis satisfy: 0.40 < (D5s-d5s) / Yc52 < 1.50. By constraining the ratio of (D5s-d5s) and Yc52 within a reasonable range, the cooperation relationship between the fifth lens and the fifth spacer element can be more reasonable, the processability and mechanical stability of the fifth lens and the fifth spacer element can be ensured, the fifth spacer element can effectively intercept unnecessary stray light, the curvature design of the fifth lens can be optimized, the aberration of the optical imaging device can be reduced, and thus the imaging quality can be improved.

[0079] It should be noted that the lens surface inflection point is mainly used to describe the characteristics of the aspheric shape of the lens surface, specifically a critical point where the curvature direction of the lens surface changes, i.e., a point where the sign of the second derivative of the radius of curvature of the lens surface changes. The lens surface can be the object-side surface of the lens or the image-side surface of the lens. The position and shape of the lens surface inflection point have a direct impact on the focusing characteristics of the light, which can help the optical imaging device adjust the path and intensity of the light passing through the lens to achieve the best imaging effect.

[0080] In some optional embodiments, the plurality of spacer elements further comprises a fourth spacer element and a fifth spacer element, the fourth spacer element is located between the fourth lens and the fifth lens and in contact with the image-side surface portion of the fourth lens, the fifth spacer element is located between the fifth lens and the sixth lens and in contact with the image-side surface portion of the fifth lens, the effective focal length f5 of the fifth lens, the inner diameter d4m of the image-side surface of the fourth spacer element, and the inner diameter d5s of the object-side surface of the fifth spacer element satisfy: 1.90 < f5 / d4m < 3.15 and 1.35 < f5 / d5s < 2.55. By controlling f5 / d4m and f5 / d5s within a reasonable range, the optical performance of the fifth lens is ensured, and at the same time, it can be ensured that the light can be correctly propagated between the fourth spacer element, the fifth lens and the fifth spacer element, thereby effectively reducing aberration, avoiding stray light or light path deviation, and ultimately improving the overall imaging quality of the optical imaging device.

[0081] In some optional embodiments, the plurality of spacer elements further comprises a third spacer element, the third spacer element is located between the third lens and the fourth lens and in contact with the image-side surface portion of the third lens, the radius of curvature R5 of the object-side surface of the third lens, the refractive index N3 of the third lens, the outer diameter D3m of the image-side surface of the third spacer element, and the inner diameter d3m of the image-side surface of the third spacer element satisfy: 6.90 < R5 x N3 / (D3m-d3m) < 23.80. By controlling R5 x N3 / (D3m-d3m) within a reasonable range, the refractive performance of the third lens can be optimized, so that the light can be better focused when passing through the third lens, thereby effectively correcting the aberration of the optical imaging device and improving the imaging quality. At the same time, controlling the difference between the outer diameter and the inner diameter of the image-side surface of the third spacer element can effectively limit the ring width of the image-side surface of the third spacer element, ensuring that the third spacer element is easy to process and has sufficient strength. In addition, constraining the above formula within a reasonable range can make the third spacer element effectively intercept stray light, further improving the imaging quality of the optical imaging device.

[0082] In some optional embodiments, the plurality of spacer elements further comprises a third spacer element, a fourth spacer element and a fifth spacer element, the third spacer element is located between the third lens and the fourth lens and contacts the image-side surface portion of the third lens, the fourth spacer element is located between the fourth lens and the fifth lens and contacts the image-side surface portion of the fourth lens, the fifth spacer element is located between the fifth lens and the sixth lens and contacts the image-side surface portion of the fifth lens, the combined focal length f45 of the fourth lens and the fifth lens, the interval distance EP34 between the image-side surface of the third spacer element and the object-side surface of the fourth spacer element along the optical axis direction, and the interval distance EP45 between the image-side surface of the fourth spacer element and the object-side surface of the fifth spacer element along the optical axis direction satisfy: 7.05 < f45 / EP34 < 14.90 and 8.20 < f45 / EP45 < 18.95. f45, EP34 and EP45 jointly affect the length of the optical imaging device along the optical axis direction. By controlling f45 / EP34 and f45 / EP45 within a reasonable range, the control ability of the fourth lens and the fifth lens on the light path can be adjusted, the propagation path of the light path is optimized, and then the aberration is better corrected, the imaging quality is improved, and the compactness of the optical imaging device is ensured, thereby meeting the optical performance requirements of the optical imaging device.

[0083] In some optional embodiments, the plurality of spacer elements further comprises a third spacer element, the third spacer element is located between the third lens and the fourth lens and contacts the image-side surface portion of the third lens, the outer diameter D3s of the object-side surface of the third spacer element, the inner diameter d3s of the object-side surface of the third spacer element, the on-axis displacement SAG41 between the intersection of the object-side surface of the fourth lens and the optical axis and the effective radius vertex of the object-side surface of the fourth lens satisfy: 1.65 < (D3s-d3s) / |SAG41| ≤ 5.60. By controlling (D3s-d3s) / |SAG41| within a reasonable range, it can be ensured that the shape of the object-side surface of the fourth lens is reasonable, the object-side surface of the fourth lens is prevented from being excessively curved or deformed, and the optical performance of the fourth lens is ensured. At the same time, the difference between the outer diameter and the inner diameter of the object-side surface of the third spacer element limits the width of the annular band of the object-side surface of the third spacer element, not only ensures the processability and structural strength of the third spacer element, but also effectively intercepts unnecessary stray light from entering the fourth lens, thereby ensuring the imaging quality.

[0084] In some optional embodiments, the plurality of spacer elements further comprises a third spacer element, the third spacer element is located between the third lens and the fourth lens and in contact with the image-side surface portion of the third lens, an outer diameter D3s of the object-side surface of the third spacer element and a central thickness CT3 of the third lens in the optical axis direction satisfy: 4.60 < D3s / CT3 < 5.95. By controlling D3s / CT3 within a reasonable range, the central thickness of the third lens can be ensured within the design range, avoiding deformation or breakage of the third lens due to insufficient thickness, or increasing the weight and volume of the optical imaging device due to excessive thickness, and constraining the above formula within a reasonable range helps to control the propagation path of light passing through the third lens, reduce aberration, and thus improve imaging quality.

[0085] In another aspect, in another optional embodiment, an optical imaging device is provided, comprising a lens barrel and a lens group and a plurality of spacer elements disposed in the lens barrel, the lens group is composed of six lenses, the lens group comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence along the optical axis direction of the optical imaging device from the object side to the image side, the first lens has positive refractive power, the object-side surface of the first lens is convex, and the image-side surface of the first lens is concave; the plurality of spacer elements comprises at least a first spacer element and a second spacer element, the first spacer element is located between the first lens and the second lens and in contact with the image-side surface portion of the first lens, and the second spacer element is located between the second lens and the third lens and in contact with the image-side surface portion of the second lens; the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R2 of the image-side surface of the first lens satisfy: 25.20 < (R1+R2) / (R1-R2) ≤ 58.75; the outer diameter D1s of the object-side surface of the first spacer element and the radius of curvature R2 of the image-side surface of the first lens satisfy: 2.25 < D1s / R2 < 3.15; the interval distance EP01 between the object-side end surface of the lens barrel and the object-side surface of the first spacer element in the optical axis direction and the radius of curvature R1 of the object-side surface of the first lens satisfy: 0.45 ≤ EP01 / R1 ≤ 0.50.

[0086] The optical imaging device of the present application is composed of a lens barrel, six lenses and at least two spacer elements, and satisfies 25.20<(R1+R2) / (R1-R2)≤58.75 and 2.25<D1s / R2<3.15, so the curvature radii of the object side and the image side of the first lens are relatively close, and the curvature radii R1 of the object side of the first lens and the curvature radii R2 of the image side of the first lens are both small in value, so that the curvature of the first lens is large. In the high temperature and high humidity test, the first lens is subjected to the extrusion force of the inner wall surface of the lens barrel and the direction parallel to the optical axis, especially when the first lens is a convex-concave crescent lens, which leads to high sensitivity of the first lens and large bending degree. When the first lens deforms, the influence on the optical performance is large. Based on this, the present application constrains the ratio of the interval distance EP01 between the object side end surface of the lens barrel and the object side surface of the first spacer element along the optical axis and the curvature radius R1 of the object side surface of the first lens within a reasonable range. In the high temperature and high humidity test, the stress distribution of the first lens is more uniform, effectively avoiding the phenomenon of stress concentration of the first lens, and then the deformation amount of each part of the first lens is within a reasonable range, so as to ensure the stability of the optical performance. That is, by constraining EP01 / R1 within a reasonable range, the optical imaging device of the present application can reduce the deformation amount of the first lens and ensure the stability of the optical performance.

[0087] Of course, the present embodiment can also include other parameter formulas in the above embodiments, which will not be described one by one here.

[0088] Optionally, the above optical imaging device can further include a filter located between the imaging surface and the sixth lens.

[0089] Optionally, the above optical imaging device can further include a protective glass for protecting the photosensitive element located on the imaging surface.

[0090] It should be noted that each lens is composed of an optical effective diameter area located at the center and an optical structure area located at the edge. The optical structure area is located on the outer circumferential side of the optical effective diameter area and is arranged in the circumferential direction of the optical effective diameter area. The optical effective diameter area is used for the passage of imaging light, and the optical structure area is not used for the passage of imaging light. The optical structure area is used for abutting with the lens barrel or the adjacent lens or the adjacent spacer element. The optical structure area is also called a non-effective diameter area.

[0091] The optical imaging device in the present application can employ multiple lenses, for example, six lenses as mentioned above. In the present application, at least one of the mirror surfaces of each lens is an aspheric mirror surface. The aspheric lens is characterized by a continuously changing curvature from the center of the lens to the periphery of the lens. Unlike the spherical lens with a constant curvature from the center of the lens to the periphery of the lens, the aspheric lens has a better radius of curvature characteristic, which has the advantages of improving the distortion aberration and improving the astigmatism aberration. After the aspheric lens is employed, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0092] Figure 1 The size annotation diagram of an optical imaging device of the present application is shown, Figure 1 The parameters d1s, D1s, d2s, d3s, d3m, D3s, D3m, d4m, d5s, D5s, d0s, EP01, EP23, EP34, EP45, SAG41 and Yc52 are marked in the figure to clearly and intuitively understand the meaning of the parameters. In order to facilitate the description of the optical imaging device and the surface type of the specific lens, these parameters will not be embodied in the figure in the subsequent description of the specific embodiments.

[0093] It should be noted that the object side end surface of the lens barrel refers to the surface of the lens barrel closest to the object side and perpendicular to the optical axis, the image side end surface of the lens barrel refers to the surface of the lens barrel closest to the image side and perpendicular to the optical axis, the object side surface of the spacer element refers to the surface in contact with the optical element on the object side of the spacer element and perpendicular to the optical axis, and the image side surface of the spacer element refers to the surface in contact with the optical element on the image side of the spacer element and perpendicular to the optical axis. The annular width of the spacer element refers to the radial width of the spacer element, which can be the annular width of the object side surface of the spacer element and the annular width of the image side surface of the spacer element. The annular width of the object side surface of the spacer element is the difference between the outer diameter and the inner diameter of the object side surface of the spacer element, and the annular width of the image side surface of the spacer element is the difference between the outer diameter and the inner diameter of the image side surface of the spacer element.

[0094] The specific surface type and parameters of the optical imaging device applicable to the above embodiments are further described below with reference to the accompanying drawings.

[0095] ​It should be noted that in the following Embodiment 1, there are Embodiments 1-1, 1-2, and 1-3; in Embodiment 2, there are Embodiments 2-1, 2-2, and 2-3; and in Embodiment 3, there are Embodiments 3-1, 3-2, and 3-3. In the three embodiments within the same embodiment, the parameters such as the radius of curvature, center thickness, and spacing between lenses, as well as the higher-order coefficients, of the optical imaging device are the same. However, the parameters such as the thickness, inner diameter, and outer diameter of the lens barrel, the first spacer element, and the sixth spacer element, as well as the shape of some lenses, are different. In other words, the main structure used for imaging is the same, but the auxiliary structures used for imaging are different.

[0096] It should be noted that any of the embodiments described in Examples 1 to 3 below are applicable to all implementation methods of this application.

[0097] Example 1

[0098] like Figures 2 to 7 As shown, the optical imaging device of Embodiment 1 is described. Figure 2 A schematic diagram of the optical imaging device of Embodiment 1-1 is shown. Figure 3 A schematic diagram of the optical imaging device of Embodiments 1-2 is shown. Figure 4 A schematic diagram of the optical imaging device of Embodiments 1-3 is shown.

[0099] like Figures 2 to 4 As shown, the optical imaging device includes a lens barrel P0, six lenses, and multiple spacer elements. The lens barrel P0 includes a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, a fifth lens E5, a fifth spacer element P5, a sixth lens E6, and a sixth spacer element P6, arranged sequentially from the object side to the image side.

[0100] like Figure 2As shown in FIG. 1, it is a structural schematic diagram of the optical imaging device of embodiment 1-1. In this embodiment, the object side S1 of the first lens partially contacts the lens barrel PO; the object side and image side of the first spacer element P1 partially contact the image side S2 of the first lens and the object side S3 of the second lens, respectively; the object side and image side of the second spacer element P2 partially contact the image side S4 of the second lens and the object side S5 of the third lens, respectively; the object side and image side of the third spacer element P3 partially contact the image side S6 of the third lens and the object side S7 of the fourth lens, respectively; the object side and image side of the fourth spacer element P4 partially contact the image side S8 of the fourth lens and the object side S9 of the fifth lens, respectively; the object side and image side of the fifth spacer element P5 partially contact the image side S10 of the fifth lens and the object side S11 of the sixth lens, respectively; the object side of the sixth spacer element P6 partially contacts the image side S12 of the sixth lens. The lens barrel PO further includes the outer wall surface of the lens barrel and the inner wall surface of the lens barrel, and the inner wall surface of the lens barrel is in a stepped shape.

[0101] As shown in FIG. 2, it is a structural schematic diagram of the optical imaging device of embodiment 1-2. The difference from embodiment 1-1 is that the image side of the first lens E1 is further provided with a first auxiliary spacer element, at this time, the image side of the first spacer element P1 partially contacts the object side of the first auxiliary spacer element, and the image side of the first auxiliary spacer element partially contacts the object side S3 of the second lens. The third spacer element P3 is buckled with the third lens E3 and the fourth lens E4, and the abutting modes of other spacer elements are the same as those of embodiment 1-1, which will not be described one by one here. Figure 3 As shown in FIG. 3, it is a structural schematic diagram of the optical imaging device of embodiment 1-3. The difference from embodiment 1-1 is that the image side of the second lens E2 is further provided with a second auxiliary spacer element, the image side of the third lens E3 is further provided with a third auxiliary spacer element, and the image side of the fifth lens E5 is further provided with a fifth auxiliary spacer element, at this time, the image side of the second spacer element P2 partially contacts the object side of the second auxiliary spacer element and the object side S5 of the third lens, and the image side of the second auxiliary spacer element also partially contacts the object side S5 of the third lens; the image side of the third spacer element P3 partially contacts the object side of the third auxiliary spacer element, and the image side of the third auxiliary spacer element partially contacts the object side S7 of the fourth lens; the image side of the fifth spacer element P5 partially contacts the object side of the fifth auxiliary spacer element, and the image side of the fifth auxiliary spacer element partially contacts the object side S11 of the sixth lens. The abutting modes of other spacer elements are the same as those of embodiment 1-1, which will not be described one by one here.

[0102] Figure 4 As shown in FIG. 3, it is a structural schematic diagram of the optical imaging device of embodiment 1-3. The difference from embodiment 1-1 is that the image side of the second lens E2 is further provided with a second auxiliary spacer element, the image side of the third lens E3 is further provided with a third auxiliary spacer element, and the image side of the fifth lens E5 is further provided with a fifth auxiliary spacer element, at this time, the image side of the second spacer element P2 partially contacts the object side of the second auxiliary spacer element and the object side S5 of the third lens, and the image side of the second auxiliary spacer element also partially contacts the object side S5 of the third lens; the image side of the third spacer element P3 partially contacts the object side of the third auxiliary spacer element, and the image side of the third auxiliary spacer element partially contacts the object side S7 of the fourth lens; the image side of the fifth spacer element P5 partially contacts the object side of the fifth auxiliary spacer element, and the image side of the fifth auxiliary spacer element partially contacts the object side S11 of the sixth lens. The abutting modes of other spacer elements are the same as those of embodiment 1-1, which will not be described one by one here.

[0103] In summary, the structural parameters of the optical imaging device of embodiment 1 under embodiment 1-1, embodiment 1-2 and embodiment 1-3 are shown in Table 8.​

[0104] In embodiment one, the first lens E1 has positive focal power, the object side S1 of the first lens is convex, and the image side S2 of the first lens is concave. The second lens E2 has positive focal power, the object side S3 of the second lens is convex, and the image side S4 of the second lens is concave. The third lens E3 has positive focal power, the object side S5 of the third lens is convex, and the image side S6 of the third lens is convex. The fourth lens E4 has negative focal power, the object side S7 of the fourth lens is convex, and the image side S8 of the fourth lens is concave. The fifth lens E5 has positive focal power, the object side S9 of the fifth lens is convex, and the image side S10 of the fifth lens is concave. The sixth lens E6 has negative focal power, the object side S11 of the sixth lens is convex, and the image side S12 of the sixth lens is concave. In Table 1, OBJ (not shown in the figure) is the object plane of the optical imaging device, and STO (not shown in the figure) is the stop, which is located on the first lens E1.

[0105] Table 1 shows the basic structure parameter table of the optical imaging device of embodiment one, wherein the units of the radius of curvature, thickness / distance are millimeters mm.

[0106] Surface number Surface type Radius of curvature Thickness / distance Refractive index Abbe number Conic constant OBJ Sphere Infinity Infinity STO Sphere Infinity -0.2651 S1 Asphere 1.3827 0.3097 1.64 56.29 -1.1586 S2 Asphere 1.3330 0.2019 0.0213 S3 Asphere 1.7946 0.3247 1.64 19.20 -0.9105 S4 Asphere 1.6873 0.0953 -0.9649 S5 Sphere 3.6362 0.7564 1.97 34.72 S6 Sphere -15.5145 0.3978 S7 Asphere 30.8328 0.3678 1.64 19.20 66.2029 S8 Asphere 17.8723 0.0592 29.2000 S9 Asphere 2.3589 0.3032 1.62 46.11 -18.3601 S10 Asphere 7.1440 0.2509 -6.4521 S11 Asphere 2.3907 0.3094 1.64 19.20 -9.7895 S12 Asphere 1.1902 -0.9050

[0107] Table 1

[0108] In embodiment one, the object side and the image side of the first lens E1, the second lens E2, the fourth lens E4 to the sixth lens E6 are all aspherical surfaces, and the surface type of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0109]

[0110] wherein x is the distance sag of the aspherical surface at a height of h along the optical axis from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface, c = 1 / R, i.e. the paraxial curvature c is the inverse of the radius of curvature R in Table 1 above; k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order coefficient A4, A6, A8, A10, A12, A14, A16, A18 and A20 which can be used for each aspherical mirror surface S1-S4, S7-S12 in embodiment one.

[0111]

[0112]

[0113] Table 2

[0114] Figure 5An on-axis chromatic aberration curve of the optical imaging device of embodiment 1 is shown, which represents the convergence point deviation of light rays of different wavelengths after passing through the optical imaging device. Figure 6 A distortion curve of the optical imaging device of embodiment 1 is shown, which represents the distortion size value corresponding to different image heights. Figure 7 A distortion curve of the optical imaging device of embodiment 1 is shown, which represents the distortion size value corresponding to different image heights. Figure 8 A magnification chromatic aberration curve of the optical imaging device of embodiment 1 is shown, which represents the deviation of different image heights on the imaging plane after the light rays pass through the optical imaging device.

[0115] According to Figures 5 to 8 It can be known that the optical imaging device given by embodiment 1 can achieve good imaging quality.

[0116] Embodiment 2

[0117] As Figures 9 to 15 shown, the optical imaging device of embodiment 2 is described. Figure 9 A structural schematic diagram of the optical imaging device of embodiment 2-1 is shown, Figure 10 A structural schematic diagram of the optical imaging device of embodiment 2-2 is shown, Figure 11 A structural schematic diagram of the optical imaging device of embodiment 2-3 is shown.

[0118] As Figures 9 to 11 shown, the optical imaging device includes a lens barrel P0, six lenses and a plurality of spacer elements, the lens barrel P0 includes, in order from the object side to the image side, a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, a fifth lens E5, a fifth spacer element P5, a sixth lens E6 and a sixth spacer element P6.

[0119] As Figure 9The diagram shows a schematic of the optical imaging device according to Embodiment 2-1. In this embodiment, the object-side surface S1 of the first lens partially contacts the lens barrel P0; the object-side surface and image-side surface of the first spacer element P1 partially contact the image-side surface S2 of the first lens and the object-side surface S3 of the second lens, respectively; the object-side surface and image-side surface of the second spacer element P2 partially contact the image-side surface S4 of the second lens and the object-side surface S5 of the third lens, respectively; the object-side surface and image-side surface of the third spacer element P3 partially contact the image-side surface S6 of the third lens and the object-side surface S7 of the fourth lens, respectively; the object-side surface and image-side surface of the fourth spacer element P4 partially contact the image-side surface S8 of the fourth lens and the object-side surface S9 of the fifth lens, respectively; the object-side surface and image-side surface of the fifth spacer element P5 partially contact the image-side surface S10 of the fifth lens and the object-side surface S11 of the sixth lens, respectively; and the object-side surface of the sixth spacer element P6 partially contacts the image-side surface S12 of the sixth lens. The lens barrel P0 also includes an outer wall surface and an inner wall surface, the inner wall surface of which is stepped.

[0120] like Figure 10 The diagram shown is a schematic representation of the optical imaging device in Embodiment 2-2. The difference from Embodiment 2-1 is that a first auxiliary spacer element is also provided on the image side of the first lens E1. In this case, the image side of the first spacer element P1 is in contact with the object side of the first auxiliary spacer element, and the image side of the first auxiliary spacer element is in contact with the object side S3 of the second lens. The third spacer element P3 is engaged with the third lens E3 and the fourth lens E4, while the bearing method of the other spacers is the same as in Embodiment 2-1, and will not be described in detail here.

[0121] like Figure 11 The diagram shows a schematic of the optical imaging device according to Embodiment 2-3. The difference from Embodiment 2-1 is that a second auxiliary spacer element is also provided on the image side of the second lens E2, a third auxiliary spacer element is also provided on the image side of the third lens E3, and a fifth auxiliary spacer element is also provided on the image side of the fifth lens E5. In this case, the image side of the second spacer element P2 is in contact with the object side of the second auxiliary spacer element and the object side of the third lens (S5 portion), and the image side of the second auxiliary spacer element is also in contact with the object side of the third lens (S5 portion); the image side of the third spacer element P3 is in contact with the object side of the third auxiliary spacer element, and the image side of the third auxiliary spacer element is in contact with the object side of the fourth lens (S7 portion); the image side of the fifth spacer element P5 is in contact with the object side of the fifth auxiliary spacer element, and the image side of the fifth auxiliary spacer element is in contact with the object side of the sixth lens (S11 portion). The bearing method of the other spacers is the same as in Embodiment 2-1, and will not be described in detail here.

[0122] In summary, the structural parameters of the optical imaging device of Embodiment 2 under Embodiments 2-1, 2-2, and 2-3 are shown in Table 8.

[0123] In embodiment two, the first lens E1 has positive refractive power, the object side S1 of the first lens is convex, and the image side S2 of the first lens is concave. The second lens E2 has positive refractive power, the object side S3 of the second lens is convex, and the image side S4 of the second lens is concave. The third lens E3 has positive refractive power, the object side S5 of the third lens is convex, and the image side S6 of the third lens is convex. The fourth lens E4 has positive refractive power, the object side S7 of the fourth lens is convex, and the image side S8 of the fourth lens is convex. The fifth lens E5 has positive refractive power, the object side S9 of the fifth lens is convex, and the image side S10 of the fifth lens is concave. The sixth lens E6 has negative refractive power, the object side S11 of the sixth lens is convex, and the image side S12 of the sixth lens is concave. In Table 1, OBJ (not shown in the figure) is the object plane of the optical imaging device, and STO (not shown in the figure) is the stop, which is located on the first lens E1.

[0124] Table 3 shows the basic structure parameter table of the optical imaging device of embodiment two, wherein the units of the curvature radius and the thickness / distance are millimeters mm.

[0125]

[0126]

[0127] Table 3

[0128] The following Table 4 gives the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of the aspherical mirrors S1-S4, S7-S12 that can be used in embodiment two. Wherein each aspherical surface type can be defined by the formula (1) given in the above embodiment one.

[0129]

[0130] Table 4

[0131] Figure 12 The axial chromatic aberration curve of the optical imaging device of embodiment two is shown, which represents the convergence focus deviation of light rays of different wavelengths after passing through the optical imaging device. Figure 13 The astigmatism curve of the optical imaging device of embodiment two is shown, which represents the meridional image surface curvature and sagittal image surface curvature corresponding to different image heights. Figure 14 The distortion curve of the optical imaging device of embodiment two is shown, which represents the distortion size value corresponding to different image heights. Figure 15 The magnification chromatic aberration curve of the optical imaging device of embodiment two is shown, which represents the deviation of light rays on the imaging plane after passing through the optical imaging device at different image heights.

[0132] According toFigures 12 to 15 It can be seen that the optical imaging device given in Embodiment Two can achieve good imaging quality.

[0133] Embodiment Three

[0134] As shown in Figures 16 to 22 , the optical imaging device of Embodiment Three is described. Figure 16 A structural schematic diagram of the optical imaging device of Embodiment 3-1 is shown, Figure 17 A structural schematic diagram of the optical imaging device of Embodiment 3-2 is shown, Figure 18 A structural schematic diagram of the optical imaging device of Embodiment 3-3 is shown.

[0135] As shown in Figures 16 to 18 , the optical imaging device includes a lens barrel P0, six lenses, and a plurality of spacer elements, the lens barrel P0 includes, in order from the object side to the image side, a first lens E1, a first spacer element P1, a second lens E2, a second spacer element P2, a third lens E3, a third spacer element P3, a fourth lens E4, a fourth spacer element P4, a fifth lens E5, a fifth spacer element P5, a sixth lens E6, and a sixth spacer element P6.

[0136] As shown in Figure 16 , a structural schematic diagram of the optical imaging device of Embodiment 3-1 is shown. In this embodiment, the object side surface S1 of the first lens partially contacts the lens barrel P0; the object side surface and the image side surface of the first spacer element P1 partially contact the image side surface S2 of the first lens and the object side surface S3 of the second lens, respectively; the object side surface and the image side surface of the second spacer element P2 partially contact the image side surface S4 of the second lens and the object side surface S5 of the third lens, respectively; the object side surface and the image side surface of the third spacer element P3 partially contact the image side surface S6 of the third lens and the object side surface S7 of the fourth lens, respectively; the object side surface and the image side surface of the fourth spacer element P4 partially contact the image side surface S8 of the fourth lens and the object side surface S9 of the fifth lens, respectively; the object side surface and the image side surface of the fifth spacer element P5 partially contact the image side surface S10 of the fifth lens and the object side surface S11 of the sixth lens, respectively; and the object side surface of the sixth spacer element P6 partially contacts the image side surface S12 of the sixth lens. The lens barrel P0 further includes an outer wall surface of the lens barrel and an inner wall surface of the lens barrel, and the inner wall surface of the lens barrel is in a stepped shape.

[0137] As shown in Figure 17As shown in FIG. 3-2, it is a structural schematic diagram of the optical imaging device of Example 3-2. The difference from Example 3-1 is that a first auxiliary spacer element is arranged on the image side of the first lens E1, at this time, the image side surface of the first spacer element P1 partially contacts the object side surface of the first auxiliary spacer element, and the image side surface of the first auxiliary spacer element partially contacts the object side surface S3 of the second lens. The third spacer element P3 is buckled with the third lens E3 and the fourth lens E4, and the abutting mode of other spacer elements is the same as that of Example 3-1, which will not be repeated here.

[0138] As shown in FIG. 3-2, it is a structural schematic diagram of the optical imaging device of Example 3-2. The difference from Example 3-1 is that a first auxiliary spacer element is arranged on the image side of the first lens E1, at this time, the image side surface of the first spacer element P1 partially contacts the object side surface of the first auxiliary spacer element, and the image side surface of the first auxiliary spacer element partially contacts the object side surface S3 of the second lens. The third spacer element P3 is buckled with the third lens E3 and the fourth lens E4, and the abutting mode of other spacer elements is the same as that of Example 3-1, which will not be repeated here. Figure 18 As shown in FIG. 3-3, it is a structural schematic diagram of the optical imaging device of Example 3-3. The difference from Example 3-1 is that a second auxiliary spacer element is arranged on the image side of the second lens E2, a third auxiliary spacer element is arranged on the image side of the third lens E3, and a fifth auxiliary spacer element is arranged on the image side of the fifth lens E5, at this time, the image side surface of the second spacer element P2 partially contacts the object side surface of the second auxiliary spacer element and the object side surface S5 of the third lens, and the image side surface of the second auxiliary spacer element also partially contacts the object side surface S5 of the third lens; the image side surface of the third spacer element P3 partially contacts the object side surface of the third auxiliary spacer element, and the image side surface of the third auxiliary spacer element partially contacts the object side surface S7 of the fourth lens; the image side surface of the fifth spacer element P5 partially contacts the object side surface of the fifth auxiliary spacer element, and the image side surface of the fifth auxiliary spacer element partially contacts the object side surface S11 of the sixth lens. The abutting mode of other spacer elements is the same as that of Example 3-1, which will not be repeated here.

[0139] In summary, the structural parameters of the optical imaging device of Example Three under Example 3-1, Example 3-2, and Example 3-3 are shown in Table 8.

[0140] In Example Three, the first lens E1 has positive focal power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens E2 has positive focal power, the object side surface S3 of the second lens is convex, and the image side surface S4 of the second lens is concave. The third lens E3 has positive focal power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is convex. The fourth lens E4 has positive focal power, the object side surface S7 of the fourth lens is convex, and the image side surface S8 of the fourth lens is concave. The fifth lens E5 has positive focal power, the object side surface S9 of the fifth lens is convex, and the image side surface S10 of the fifth lens is concave. The sixth lens E6 has negative focal power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is concave. Among them, OBJ (not shown in the figure) in Table 1 is the object plane of the optical imaging device, and STO (not shown in the figure) is the stop, which is located on the first lens E1.

[0141] Table 5 shows a table of basic structure parameters of the optical imaging device of Example Three, wherein the units of the radius of curvature, thickness / distance are millimeter (mm).

[0142] Surface number Surface type Radius of curvature Thickness / distance Refractive index Abbe number Conic constant OBJ Sphere Infinity Infinity STO Sphere Infinity -0.2651 S1 Asphere 1.3564 0.3097 1.64 19.20 -1.1076 S2 Asphere 1.3110 0.2192 0.0213 S3 Asphere 1.7529 0.3247 1.64 19.20 -0.7568 S4 Asphere 1.7370 0.1198 -0.7722 S5 Sphere 3.8099 0.7028 1.97 34.72 S6 Sphere -23.9888 0.4201 S7 Asphere 19.5357 0.3678 1.64 19.20 100.9791 S8 Asphere 22.9827 0.0592 -0.1044 S9 Asphere 2.3652 0.3032 1.62 46.11 -18.0865 S10 Asphere 5.4247 0.2314 -300.8368 S11 Asphere 2.0990 0.3094 1.64 19.20 -8.3247 S12 Asphere 1.1504 -0.9131

[0143] Table 5

[0144] The following Table 6 gives the high order term coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of each aspherical mirror S1-S4, S7-S12 which can be used in Example Three. Wherein each aspherical surface type can be defined by the formula (1) given in Example One above.

[0145]

[0146]

[0147] Table 6

[0148] Figure 19 The on-axis chromatic aberration curve of the optical imaging device of Example Three is shown, which represents the convergence focus deviation of light rays of different wavelengths after passing through the optical imaging device. Figure 20 The astigmatism curve of the optical imaging device of Example Three is shown, which represents the meridional image surface curvature and sagittal image surface curvature corresponding to different image heights. Figure 21 The distortion curve of the optical imaging device of Example Three is shown, which represents the distortion size value corresponding to different image heights. Figure 22 The magnification chromatic aberration curve of the optical imaging device of Example Three is shown, which represents the deviation of different image heights on the imaging surface after the light rays pass through the optical imaging device.

[0149] According to Figures 19 to 22 It can be seen that the optical imaging device given in Example Three can achieve good imaging quality.

[0150] In summary, the optical imaging devices of Example One to Example Three respectively satisfy the relationships shown in Table 7.

[0151] Conditional expression / embodiment 1-1 1-2 1-3 2-1 2-2 2-3 3-1 3-2 3-3 EP01 / R1 0.45 0.50 0.45 0.49 0.47 0.47 0.50 0.46 0.45 D1s / R2 2.30 2.97 3.02 2.41 3.08 3.13 2.38 3.08 3.07 D1s / d1s 1.57 2.17 2.20 1.72 2.20 2.23 1.70 2.19 2.22 d2s / R3 1.29 1.23 1.73 1.26 1.24 1.98 1.25 1.25 1.94 |f12| / (d1s+d2s) 7.62 8.06 6.61 2.28 2.30 1.74 4.91 4.88 3.79 d2s / CT2 7.15 6.81 9.55 6.60 6.53 10.37 6.73 6.77 10.46 EP23 / T23 5.88 4.79 4.48 6.24 4.70 4.72 5.05 3.81 3.89 EP45 / CT4 0.97 0.97 0.88 1.24 0.97 1.00 1.24 1.15 0.93 (EP01-T12) / CT1 1.35 1.60 1.38 1.56 1.44 1.44 1.47 1.30 1.24 (D5s-d5s) / Yc52 1.49 1.46 0.45 1.18 0.42 0.41 1.28 1.24 0.43 f5 / d4m 1.94 1.94 1.95 3.05 3.07 3.13 2.19 2.14 2.21 f5 / d5s 1.63 1.63 1.40 2.50 2.34 2.27 1.79 1.81 1.63 R5xN3 / (D3m-d3m) 7.54 15.42 15.42 8.17 20.06 23.75 6.92 16.16 15.35 T34 / |SAG41| 1.79 1.79 1.79 2.41 2.41 2.41 2.02 2.02 2.02 (R1+R2) / (R1-R2) 54.64 54.64 54.64 25.24 25.24 25.24 58.75 58.75 58.75 f45 / EP34 11.45 14.05 14.86 7.06 8.66 9.28 11.95 14.65 13.34 f45 / EP45 17.20 17.20 18.90 8.23 10.60 10.28 14.00 15.02 18.55 (D3s-d3s) / |SAG41| 4.28 1.66 2.10 5.60 1.80 2.29 5.21 2.16 1.78 d0s / R1 2.46 1.93 2.22 1.74 1.99 2.20 1.82 2.10 2.26 D3s / CT3 4.64 4.69 5.22 5.34 5.34 5.94 5.10 5.16 5.60

[0152] Table 7

[0153] Table 8 shows part of the parameters of the optical imaging devices of Example One to Example Three, with the unit of millimeter (mm). Wherein f is the effective focal length of the optical imaging device, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, f12 is the combined focal length of the first lens and the second lens, f45 is the combined focal length of the fourth lens and the fifth lens.

[0154] Parameter / embodiment 1-1 1-2 1-3 2-1 2-2 2-3 3-1 3-2 3-3 d1s 1.9528 1.8298 1.8298 1.8128 1.8028 1.8118 1.8342 1.8428 1.8098 D1s 3.0650 3.9656 4.0302 3.1112 3.9668 4.0314 3.1250 4.0428 4.0206 d2s 2.3210 2.2102 3.1004 2.1422 2.1216 3.3673 2.1846 2.1992 3.3974 d3s 2.5570 3.1836 3.4800 2.4110 3.1848 3.4812 2.5006 3.1726 3.5669 d3m 2.5570 3.5279 3.5043 2.4110 3.5288 3.5353 2.5006 3.6066 3.5244 D3s 3.5072 3.5512 3.9472 3.5530 3.5524 3.9485 3.5859 3.6229 3.9376 D3m 3.5072 3.9924 3.9688 3.5530 3.9936 3.9280 3.5859 4.0711 4.0132 d4m 2.8700 2.8700 2.8500 3.0040 2.9780 2.9220 2.9920 3.0540 2.9640 d5s 3.4200 3.4200 3.9710 3.6660 3.9081 4.0355 3.6500 3.6100 4.0247 D5s 4.9780 4.9420 4.4383 5.0240 4.3928 4.5028 5.0560 4.9660 4.4920 d0s 3.4080 2.6700 3.0680 2.4200 2.7700 3.0720 2.4640 2.8480 3.0600 EP01 0.6211 0.6970 0.6280 0.6860 0.6500 0.6500 0.6740 0.6210 0.6040 EP23 0.5600 0.4561 0.4270 0.6050 0.4561 0.4580 0.6050 0.4561 0.4661 EP34 0.5330 0.4347 0.4110 0.5330 0.4347 0.4057 0.5330 0.4347 0.4777 EP45 0.3550 0.3550 0.3230 0.4570 0.3550 0.3660 0.4550 0.4240 0.3434 f 2.88 2.88 2.88 2.86 2.86 2.86 2.90 2.90 2.90 f1 40.02 40.02 40.02 185.73 185.73 185.73 36.43 36.43 36.43 f2 236.61 236.61 236.61 14.62 14.62 14.62 42.53 42.53 42.53 f3 3.09 3.09 3.09 3.89 3.89 3.89 3.43 3.43 3.43 f4 -66.80 -66.80 -66.80 12.73 12.73 12.73 194.26 194.26 194.26 f5 5.57 5.57 5.57 9.16 9.16 9.16 6.54 6.54 6.54 f6 -4.10 -4.10 -4.10 -4.38 -4.38 -4.38 -4.53 -4.53 -4.53 SAG41 -0.2220 -0.2220 -0.2220 -0.2041 -0.2041 -0.2041 -0.2082 -0.2082 -0.2082 f45 6.11 6.11 6.11 3.76 3.76 3.76 6.37 6.37 6.37 Yc52 1.0450 1.0450 1.0450 1.1520 1.1520 1.1520 1.0970 1.0970 1.0970 f12 32.57 32.57 32.57 -9.03 -9.03 -9.03 19.71 19.71 19.71

[0155] Table 8

[0156] The present application also provides an imaging device, the electronic photosensitive element of which can be a charge coupled device (CCD) or a complementary metal-oxide semiconductor device (CMOS). The imaging device can be a stand-alone imaging apparatus such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging device described above.

[0157] Obviously, the above-described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts should fall within the protection scope of the present application.

[0158] It is to be noted that the terms used herein are only used to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise, and it should be further understood that the terms "comprise" and / or "include" as used herein specify the presence of the stated features, steps, work, devices, components and / or combinations thereof.

[0159] It should be noted that the terms "first", "second", and the like in the description of the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0160] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An optical imaging device, characterized by, It includes a lens barrel and a lens assembly and multiple spacer elements disposed within the lens barrel. The lens group consists of six lenses, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side to the image side along the optical axis of the optical imaging device. The first lens has positive optical power, the object side of the first lens is convex, and the image side of the first lens is concave. The plurality of spacers includes at least a first spacer and a second spacer, wherein the first spacer is located between the first lens and the second lens and contacts the image-side side portion of the first lens, and the second spacer is located between the second lens and the third lens and contacts the image-side side portion of the second lens; The radius of curvature R1 of the object side of the first lens and the radius of curvature R2 of the image side of the first lens satisfy the following condition: 25.20 < (R1 + R2) / (R1 - R2) ≤ 58.75; The outer diameter D1s of the object side of the first spacer element and the radius of curvature R2 of the image side of the first lens satisfy the following relationship: 2.25 <D1s / R2<3.15; The distance EP01 between the object-side end face of the lens barrel and the object-side surface of the first spacer element along the optical axis, the air gap T12 between the image-side surface of the first lens and the object-side surface of the second lens on the optical axis of the optical imaging device, and the center thickness CT1 of the first lens on the optical axis satisfy the following: 1.20 < (EP01 - T12) / CT1 ≤ 1.

60.

2. The optical imaging device of claim 1, wherein, The outer diameter D1s of the object side of the first spacer element and the inner diameter d1s of the object side of the first spacer element satisfy the following relationship: 1.55 <D1s / d1s<2.25。 3. The optical imaging device of claim 1, wherein, The inner diameter d2s of the object-side surface of the second spacer element and the radius of curvature R3 of the object-side surface of the second lens satisfy the following relationship: 1.20 <d2s / R3<2.00。 4. The optical imaging device of claim 1, wherein, The combined focal length f12 of the first lens and the second lens, the inner diameter d1s of the object side of the first spacer element, and the inner diameter d2s of the object side of the second spacer element satisfy the following condition: 1.70 < |f12| / (d1s+d2s) < 8.

10.

5. The optical imaging device of claim 1, wherein, The inner diameter d0s of the object-side end face of the lens barrel and the radius of curvature R1 of the object-side surface of the first lens satisfy the following relationship: 1.70 <d0s / R1<2.50。 6. The optical imaging device of claim 1, wherein, The inner diameter d2s of the object side of the second spacer element and the center thickness CT2 of the second lens on the optical axis satisfy: 6.50 <d2s / CT2<10.50。 7. The optical imaging device of claim 1, wherein, The air gap T34 between the third lens and the fourth lens on the optical axis, and the axial displacement SAG41 between the intersection of the object-side surface of the fourth lens and the optical axis and the vertex of the effective radius of the object-side surface of the fourth lens, satisfy the following: 1.75 <T34 / |SAG41|<2.45。 8. The optical imaging device according to any one of claims 1 to 7, characterized in that, The plurality of spacers further includes a third spacer element, which is located between the third lens and the fourth lens and contacts the image-side surface of the third lens. An interval distance EP23 of an image-side surface of the second spacer element and an object-side surface of the third spacer element in the optical axis direction, an air interval T23 between an image-side surface of the second lens and an object-side surface of the third lens on the optical axis satisfy: 3.80 < EP23 / T23 < 6.

25.

9. The optical imaging device according to any one of claims 1 to 7, characterized in that, The plurality of spacer elements further include a fourth spacer element and a fifth spacer element, the fourth spacer element being located between the fourth lens and the fifth lens and partially in contact with an image-side surface of the fourth lens, the fifth spacer element being located between the fifth lens and the sixth lens and partially in contact with an image-side surface of the fifth lens, An interval distance EP45 of an image-side surface of the fourth spacer element and an object-side surface of the fifth spacer element in the optical axis direction, a central thickness CT4 of the fourth lens on the optical axis satisfy: 0.85 < EP45 / CT4 < 1.

25.

10. The optical imaging device according to any one of claims 1 to 7, characterized in that, The plurality of spacer elements further include a fifth spacer element, the fifth spacer element being located between the fifth lens and the sixth lens and partially in contact with an image-side surface of the fifth lens, An outer diameter D5s of an object-side surface of the fifth spacer element, an inner diameter d5s of the object-side surface of the fifth spacer element, a distance Yc52 from an inflection point of an effective diameter of an image-side surface of the fifth lens away from the optical axis to the optical axis satisfy: 0.40 < (D5s-d5s) / Yc52 < 1.50.

Images