Optical imaging lens

Abstract

The utility model discloses an optical imaging lens which comprises a lens barrel, a lens group and a spacing element group, wherein the lens group and the spacing element group are accommodated in the lens barrel; the lens group comprises a first lens with positive focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with negative focal power and a fifth lens with negative focal power which are sequentially arranged from the object side to the image side along the optical axis; the spacing element group comprises a second spacing element, a third spacing element and a fourth spacing element, the second spacing element is arranged between the second lens and the third lens and is in contact with the image side surface of the second lens, and the third spacing element is arranged between the third lens and the fourth lens and is in contact with the image side surface of the third lens; the fourth spacing element is arranged between the fourth lens and the fifth lens and is in contact with the image side surface of the fourth lens; the optical imaging lens satisfies the following conditions: 0.30 lt; (T34 + T45) / Llt; 0.50, 0.20 lt, 0.50, 0.20 lt; (CP3 + CP4) / T45lt; 1.10, 0.55 lt, 1.10, 0.55 lt; eP23 / CP3lt, EP23 / CP3lt; 1.20, 0.80 lt, 1.20, 0.80 lt; d3s / d3mlt; 1.20 and 0.60 lt, 1.20 and 0.60 lt; d < 4 > s / d < 4 > mlt; and 1.10.

Description

Technical Field

[0001] The present application relates to the field of optical devices, and in particular to an optical imaging lens. Background Art

[0002] In recent years, with the ever-changing consumer demand, the requirements for optical imaging lenses have gradually become more complex and diversified. In different application scenarios, the performance of optical imaging lenses varies.

[0003] In the prior art, some optical imaging lenses often have large air gaps between the lenses when they are arranged. In such cases, spacers are generally installed at the corresponding air gaps to increase support stability and reduce the risk of lens molding. However, the thickness of the spacers affects the thickness of the non-effective diameter area of the lens, causing the peak of the lens's modulation transfer function (MTF) curve to drop and field curvature to shift, thereby affecting the imaging quality of the optical imaging lens. Utility Model Content

[0004] The present application provides an optical imaging lens that can at least solve or partially solve at least one problem or other problems existing in the prior art.

[0005] One aspect of the present application provides an optical imaging lens, which includes a lens barrel, a lens group, and a spacer element group accommodated in the lens barrel. The lens group includes a first lens with a positive optical power, a second lens with a negative optical power, a third lens with a positive optical power, a fourth lens with a negative optical power, and a fifth lens with a negative optical power arranged in sequence from the object side to the image side along the optical axis. The spacer element group includes a second spacer element, a third spacer element, and a fourth spacer element. The second spacer element is disposed between the second lens and the third lens and contacts the image side surface of the second lens. The third spacer element is disposed between the third lens and the fourth lens and contacts the image side surface of the third lens. The fourth spacer element is disposed between the fourth lens and the fifth lens and contacts the image side surface of the fourth lens. The optical imaging lens satisfies: 0.30 < (T34 + T45) / L < 0.50; 0.20 < (CP3 + CP4) / T4 < 1.10; 0.55 < EP23 / CP3 < 1.20; 0.80 < d3s / d3m < 1.20; and 0.60 < d4s / d4m < 1.10. Wherein, L is the maximum length of the lens barrel along the optical axis direction, T34 is the spacing distance between the third lens and the fourth lens on the optical axis, T45 is the spacing distance between the fourth lens and the fifth lens on the optical axis, CP3 is the maximum thickness of the third spacer element, CP4 is the maximum thickness of the fourth spacer element, EP23 is the distance between the second spacer element and the third spacer element along the optical axis, d3s is the inner diameter of the object side surface of the third spacer element, d3m is the inner diameter of the image side surface of the third spacer element, d4s is the inner diameter of the object side surface of the fourth spacer element, and d4m is the inner diameter of the image side surface of the fourth spacer element.

[0006] According to an exemplary embodiment of the present application, the spacer element group further includes a third auxiliary spacer element, which is disposed on the image side of the third spacer element and contacts the image side surface of the third spacer element. And the effective semi-aperture of the object side surface and the image side surface of the fourth lens are both smaller than the effective semi-aperture of the object side surface and the image side surface of any one lens other than the fourth lens in the lens group.

[0007] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: -5.30 < d3bs / (R8 - R7) < -2.10, where d3bs is the inner diameter of the object side surface of the third auxiliary spacer element, R7 is the curvature radius of the object side surface of the fourth lens, and R8 is the curvature radius of the image side surface of the fourth lens.

[0008] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 1.70 < (D3bs - d3bs) / d3bm < 2.30, where D3bs is the outer diameter of the object side surface of the third auxiliary spacer element, d3bs is the inner diameter of the object side surface of the third auxiliary spacer element, and d3bm is the inner diameter of the image side surface of the third auxiliary spacer element.

[0009] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 0.10 < (d4s - d3bm) / (R7 + R8) < 1.00, where d3bm is the inner diameter of the image side of the third auxiliary spacer element, R7 is the curvature radius of the object side of the fourth lens, and R8 is the curvature radius of the image side of the fourth lens.

[0010] According to an exemplary embodiment of the present application, the spacer element group further includes a first spacer element, which is disposed between the first lens and the second lens and contacts the image side of the first lens; the optical imaging lens satisfies: 0.30 < EP23 / (EP12 + T12) < 0.70, where EP12 is the distance between the first spacer element and the second spacer element along the optical axis direction, and T12 is the distance between the first lens and the second lens on the optical axis.

[0011] According to an exemplary embodiment of the present application, the object side of the fourth lens is convex, and the fourth lens is a meniscus lens near the optical axis; the fifth lens is a meniscus lens with a concave object side near the optical axis; and the optical imaging lens satisfies: 0.40 < f4 / f5 < 1.00, where f4 is the effective focal length of the fourth lens and f5 is the effective focal length of the fifth lens.

[0012] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 1.30 < T45 / CP4 < 60.00.

[0013] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: -1.30 < (f2 + f4) / f3 < -0.30 and 1.30 < d2m / d3bs < 1.60, where 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, d2m is the inner diameter of the image side of the second spacer element, and d3bs is the inner diameter of the object side of the third auxiliary spacer element.

[0014] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 0.70 < L / f < 0.80, where f is the total effective focal length of the optical imaging lens.

[0015] According to an exemplary embodiment of the present application, the spacer element group further includes a first spacer element, which is disposed between the first lens and the second lens and contacts the image side of the first lens; and the optical imaging lens satisfies: -0.60 < f1 / f2 < -0.40 and 1.10 < d1m / d2s < 1.30, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, d1m is the inner diameter of the image side of the first spacer element, and d2s is the inner diameter of the object side of the second spacer element.

[0016] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 2.40 < EP34 / CT4 < 3.40, where EP34 is the distance between the third spacer element and the fourth spacer element along the optical axis, and CT4 is the central thickness of the fourth lens on the optical axis.

[0017] According to an exemplary embodiment of the present application, the optical imaging lens satisfies: 0.50 < |(d0m - d0s)| * FNO < 2.50, where d0s is the inner diameter of the object-side end face of the lens barrel, d0m is the inner diameter of the image-side end face of the lens barrel, and FNO is the f-number of the optical imaging lens.

[0018] According to an exemplary embodiment of the present application, there is a spacing distance on the optical axis between any adjacent lenses among the first lens to the fifth lens, and the spacing distance increases sequentially from the object side to the image side; and at least one spacer element is provided between adjacent lenses.

[0019] Another aspect of the present application provides an optical imaging lens, including a lens barrel and a lens group and a spacer element group accommodated in the lens barrel. The lens group includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged in sequence from the object side to the image side along the optical axis; the spacer element group includes a second spacer element, a third spacer element, and a fourth spacer element. The second spacer element is disposed between the second lens and the third lens and contacts the image-side surface of the second lens. The third spacer element is disposed between the third lens and the fourth lens and contacts the image-side surface of the third lens. The fourth spacer element is disposed between the fourth lens and the fifth lens and contacts the image-side surface of the fourth lens. The optical imaging lens satisfies: 0.30 < (T34 + T45) / L < 0.50; 0.20 < (CP3 + CP4) / T45 < 1.10; 0.55 < EP23 / CP3 < 1.20; 2.40 < EP34 / CT4 < 3.40; where L is the maximum length of the lens barrel along the optical axis, T34 is the spacing distance between the third lens and the fourth lens on the optical axis, T45 is the spacing distance between the fourth lens and the fifth lens on the optical axis, CP3 is the maximum thickness of the third spacer element, CP4 is the maximum thickness of the fourth spacer element, EP23 is the distance between the second spacer element and the third spacer element along the optical axis, EP34 is the distance between the third spacer element and the fourth spacer element on the optical axis, and CT4 is the central thickness of the fourth lens on the optical axis.

[0020] The sum of the distances along the optical axis between the third and fourth lenses, and between the fourth and fifth lenses, of the optical imaging lens provided by this application occupies a relatively large space within the lens barrel. Thick spacers are provided at the corresponding distances. These thick spacers affect the thickness of the non-effective diameter regions of the third and fourth lenses, as well as the interception of excess light at the edges, thereby affecting the peak value and field curvature of the field of view. Therefore, by controlling the ratios of (CP3+CP4) / T45, EP23 / CP3, d3s / d3m, and d4s / d4m, the maximum thickness of the third and fourth spacers can be constrained within a reasonable range, avoiding the effects of the spacing. The problem of too small thickness of the non-effective diameter area of the fourth lens caused by the excessive thickness of the element is solved, which reduces the edge surface sensitivity of the fourth lens and improves the outer field peak; avoiding the problem of too large thickness of the non-effective diameter area of the fourth lens caused by too small thickness of the spacer element is beneficial to lens molding, reduces the stress generated by the fourth lens, and improves the central field peak; at the same time, it can also limit the ratio of the inner diameters of the object side and the image side of the third spacer element and the ratio of the inner diameters of the object side and the image side of the fourth spacer element, so that the third spacer element and the fourth spacer element can effectively intercept part of the edge light, reduce the off-axis chromatic aberration and the outer field field curvature offset of the optical imaging lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present application will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings, in which:

[0022] Figure 1 A schematic diagram showing the structural arrangement of an optical imaging lens of the present application and some parameters thereof;

[0023] Figure 2A 1 shows a schematic structural diagram of an optical imaging lens according to Example 1 of the present application;

[0024] Figure 2B 1 shows a schematic structural diagram of an optical imaging lens according to Example 2 of the present application;

[0025] Figures 3A to 3C The axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lenses of Example 1 and Example 2 of the present application are respectively shown;

[0026] Figure 4A 1 shows a schematic structural diagram of an optical imaging lens according to Example 3 of the present application;

[0027] Figure 4B 1 shows a schematic structural diagram of an optical imaging lens according to Example 4 of the present application;

[0028] Figures 5A to 5CThe axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lenses of Example 3 and Example 4 of the present application are respectively shown;

[0029] Figure 6A 1 shows a schematic structural diagram of an optical imaging lens according to Example 5 of the present application;

[0030] Figure 6B 1 shows a schematic structural diagram of an optical imaging lens according to Example 6 of the present application;

[0031] 7A to 7C axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lenses of Examples 5 and 6 of the present application are respectively shown;

[0032] Figure 8A 1 shows a schematic structural diagram of an optical imaging lens according to Example 7 of the present application;

[0033] Figure 8B 1 shows a schematic structural diagram of an optical imaging lens according to Example 8 of the present application;

[0034] Figures 9A to 9C axial chromatic aberration curve, astigmatism curve, and distortion curve of the optical imaging lenses of Example 7 and Example 8 of the present application are respectively shown;

[0035] Figure 10 The modulation transfer function curve of the optical imaging lens of the present application is shown when (T34+T45) / L=0.45, EP23 / CP3=0.8, (CP3+CP4) / T45=0.7, d3s / d3m=1.1, and d4s / d4m=0.9 are satisfied;

[0036] Figure 11 The modulation transfer function curve of the optical imaging lens is shown when (T34+T45) / L=0.45, EP23 / CP3=1.35, (CP3+CP4) / T45=1.6, d3s / d3m=1.45, and d4s / d4m=1.33.

[0037] Figure 12 The modulation transfer function curve of the optical imaging lens is shown when (T34+T45) / L=0.45, EP23 / CP3=0.15, (CP3+CP4) / T45=0.45, d3s / d3m=0.4 and d4s / d4m=0.2. DETAILED DESCRIPTION

[0038] In order to better understand the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0039] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0040] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0041] In this document, if a lens surface is convex and the location of the convex surface is unspecified, it means that the lens surface is convex at least in its paraxial region. If a lens surface is concave and the location of the concave surface is unspecified, it means that the lens surface is concave at least in its paraxial region. The paraxial region refers to the area near the optical axis. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.

[0042] It should also be understood that the terms "including" and / or "having," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when describing embodiments of the present application, the term "may" is used to indicate "one or more embodiments of the present application." Furthermore, the term "exemplary" is intended to refer to an example or illustration.

[0043] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and will not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0044] It should be noted that, in the absence of any conflict, the embodiments and features in the embodiments of this application can be combined with each other. The following embodiments only express several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be understood as limiting the scope of the patent of this application. It should be pointed out that for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of this application, and these all fall within the scope of protection of this application. For example, the lens groups, lens barrels, and spacer element groups in the various embodiments of this application can be combined arbitrarily, and are not limited to the lens group in one embodiment being combined only with the lens barrel, spacer element group, etc. of that embodiment.

[0045] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0046] Figure 1 The following is an exemplary diagram showing the structure of an optical imaging lens and some parameters of the present application, so as to facilitate a better understanding of the present application. Figure 1 As shown, d0s is the inner diameter of the object side end surface of the lens barrel, d0m is the inner diameter of the image side end surface of the lens barrel, d1m is the inner diameter of the image side surface of the first spacing element, d2s is the inner diameter of the object side surface of the second spacing element, d2m is the inner diameter of the image side surface of the second spacing element, d3s is the inner diameter of the object side surface of the third spacing element, d3m is the inner diameter of the image side surface of the third spacing element, d4s is the inner diameter of the object side surface of the fourth spacing element, d4m is the inner diameter of the image side surface of the fourth spacing element, and d3bs is the inner diameter of the third auxiliary element. The inner diameter of the object-side surface of the auxiliary spacer element, d3bm is the inner diameter of the image-side surface of the third auxiliary spacer element, D3bs is the outer diameter of the object-side surface of the third auxiliary spacer element, EP12 is the distance between the first spacer element and the second spacer element along the optical axis, EP23 is the distance between the second spacer element and the third spacer element along the optical axis, EP34 is the distance between the third spacer element and the fourth spacer element along the optical axis, CP3 is the maximum thickness of the third spacer element, and CP4 is the maximum thickness of the fourth spacer element.

[0047] refer to Figure 2A 、 Figure 2B 、 Figure 4A 、 Figure 4B 、 Figure 6A 、 Figure 6B 、 Figure 8A and Figure 8BIn a first aspect, the present application provides an optical imaging lens. The optical imaging lens may include a lens group, which may include a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged in sequence along the optical axis from the object side to the image side. Each lens has at least an object-side surface facing the object side and an image-side surface facing the imaging surface. Among the first to fifth lenses, any two adjacent lenses may have a spacing distance on the optical axis, and the spacing distance increases sequentially from the object side to the image side. This spacing distance may be an air spacing.

[0048] In an exemplary embodiment, the first lens may have positive optical power. The second lens may have negative optical power. The third lens may have positive optical power. The fourth lens may have negative optical power. The fifth lens may have negative optical power.

[0049] In an exemplary embodiment, the optical imaging lens further includes a spacer element group, which may include at least one spacer element disposed between the lenses and located in the non-effective diameter region of the lenses. It should be understood that this application does not specifically limit the number of spacer elements; at least one spacer element is disposed between any two adjacent lenses, and the entire optical imaging lens may include any number of spacer elements. The spacer element helps the optical imaging lens intercept excess refractive and reflective light paths, reducing stray light and ghosting, and improving imaging quality.

[0050] In an exemplary embodiment, the optical imaging lens further includes a lens barrel. The lens group and the spacer element group are disposed within the lens barrel. The lens barrel includes an object-side end surface, an image-side end surface, an outer annular surface, and an inner annular surface. The end surface of the lens barrel closest to the object side is the object-side end surface of the lens barrel, and the end surface of the lens barrel closest to the image side is the image-side end surface of the lens barrel. In a direction perpendicular to the optical axis, the surface of the lens barrel farthest from the optical axis is the outer annular surface, and the surface of the lens barrel closest to the optical axis is the inner annular surface. Exemplarily, the lens barrel may be integrally formed.

[0051] In an exemplary embodiment, the optical imaging lens may further include an aperture for limiting the light beam. This aperture helps to focus the light entering the optical lens, reduce the maximum aperture of the optical lens, and lower the system's assembly sensitivity, thereby further improving the imaging quality of the optical lens. It should be noted that the aperture can be positioned between or to one side of any lens as needed.

[0052] In an exemplary embodiment, the spacer element group includes a second spacer element, a third spacer element, and a fourth spacer element, the second spacer element being positioned between the second lens and the third lens and at least partially in contact with the image side surface of the second lens, the third spacer element being positioned between the third lens and the fourth lens and at least partially in contact with the image side surface of the third lens, and the fourth spacer element being positioned between the fourth lens and the fifth lens and at least partially in contact with the image side surface of the fourth lens.

[0053] In an exemplary embodiment, the optical imaging lens satisfies: 0.30 < (T34 + T45) / L < 0.50; 0.20 < (CP3 + CP4) / T45 < 1.10; 0.55 < EP23 / CP3 < 1.20; 0.80 < d3s / d3m < 1.20; and 0.60 < d4s / d4m < 1.10, where L is the maximum length of the lens barrel along the optical axis direction, T34 is the distance between the third lens and the fourth lens on the optical axis, T45 is the distance between the fourth lens and the fifth lens on the optical axis, CP3 is the maximum thickness of the third spacer element, CP4 is the maximum thickness of the fourth spacer element, EP23 is the distance between the second spacer element and the third spacer element along the optical axis direction, d3s is the inner diameter of the object side surface of the third spacer element, d3m is the inner diameter of the image side surface of the third spacer element, d4s is the inner diameter of the object side surface of the fourth spacer element, and d4m is the inner diameter of the image side surface of the fourth spacer element.

[0054] In this embodiment, the sum of the distances between the third lens and the fourth lens and between the fourth lens and the fifth lens on the optical axis occupies a relatively large space position inside the lens barrel. At the corresponding distance, spacer elements with a relatively large thickness are provided. The spacer elements with a relatively large thickness will affect the thickness of the non-effective diameter regions of the third lens and the fourth lens and the interception of excess marginal light, thereby affecting the peak of the field of view and the field curvature. Therefore, by controlling the ratios of (CP3 + CP4) / T45, EP23 / CP3, d3s / d3m, and d4s / d4m, the maximum thicknesses of the third spacer element and the fourth spacer element can be constrained within a reasonable range, avoiding the problem of too small thickness of the non-effective diameter region of the fourth lens caused by too large thickness of the spacer element, reducing the sensitivity of the marginal surface shape of the fourth lens, and increasing the peak of the outer field of view; avoiding the problem of too large thickness of the non-effective diameter region of the fourth lens caused by too small thickness of the spacer element, facilitating lens molding, and reducing the stress generated by the fourth lens, increasing the peak of the central field of view; at the same time, the ratios of the inner diameter of the object side surface to the inner diameter of the image side surface of the third spacer element and the fourth spacer element can also be limited, enabling the third spacer element and the fourth spacer element to effectively intercept some marginal light, reducing the off-axis chromatic aberration and the off-axis field curvature deviation of the optical imaging lens.

[0055] Figure 10 The modulation transfer function curve of the optical imaging lens of the present application when (T34 + T45) / L = 0.45, EP23 / CP3 = 0.8, (CP3 + CP4) / T45 = 0.7, d3s / d3m = 1.1, and d4s / d4m = 0.9 is shown.

[0056] Figure 11The modulation transfer function curve of the optical imaging lens is shown when (T34+T45) / L=0.45, EP23 / CP3=1.35, (CP3+CP4) / T45=1.6, d3s / d3m=1.45 and d4s / d4m=1.33.

[0057] Figure 12 The modulation transfer function curve of the optical imaging lens is shown when (T34+T45) / L=0.45, EP23 / CP3=0.15, (CP3+CP4) / T45=0.45, d3s / d3m=0.4 and d4s / d4m=0.2.

[0058] Figures 10 to 12 Specifically, the modulation transfer function curves of the optical imaging lens at 0F, 0.2F, 0.4F, 0.6F, 0.8F, and 1.0F are shown for a cutoff frequency of 110 lp / mm. Where F represents the field of view, 0F corresponds to an image height of 0.00mm, 0.2F to 0.66mm, 0.4F to 1.32mm, 0.6F to 1.98mm, 0.8F to 2.64mm, and 1.0F to 3.30mm.

[0059] Figure 10 The optical imaging lens satisfies the limited ranges of the conditional formulas (T34+T45) / L, EP23 / CP3, (CP3+CP4) / T45, d3s / d3m and d4s / d4m in this application, which is not only beneficial for the smooth transition of light to the last lens in the lens, but also can constrain the maximum thickness of the third spacer element and the fourth spacer element within a reasonable range, avoiding the problem of too small thickness of the non-effective diameter area of the fourth lens due to the excessive thickness of the spacer element, reducing the edge surface sensitivity of the fourth lens, and improving the external field of view peak; avoiding the problem of too large thickness of the non-effective diameter area of the fourth lens due to the excessive thickness of the spacer element, which is beneficial to lens molding, and reduces the stress generated by the fourth lens, and improves the central field of view peak; at the same time, it can also limit the ratio of the inner diameter of the object side and the image side of the third spacer element and the ratio of the inner diameter of the object side and the image side of the fourth spacer element, so that the third spacer element and the fourth spacer element can effectively intercept part of the edge light, reducing the off-axis chromatic aberration and external field of view curvature offset of the optical imaging lens. Figure 10 It can be seen from the figure that the modulation transfer function curve is relatively concentrated, which is conducive to ensuring imaging quality.

[0060] Figure 11For the medium optical imaging lens, the conditional EP23 / CP3, (CP3+CP4) / T45, d3s / d3m, and d4s / d4m all exceed the upper limit of the scope defined in this application, resulting in excessive thicknesses of the third spacer element and the fourth spacer element, excessively compressing the thicknesses of the ineffective diameter regions of the third lens and the fourth lens, and further causing the edge surface shape of the fourth lens to be sensitive and the peak value in the outer field of view to drop; the third spacer element and the fourth spacer element fail to effectively intercept the excess light in the outer field of view, causing the field curvature shift in the outer field of view.

[0061] Figure 12 For the medium optical imaging lens, the conditional EP23 / CP3, (CP3+CP4) / T45, d3s / d3m, and d4s / d4m all exceed the lower limit of the scope defined in this application, resulting in excessively small thicknesses of the third spacer element and the fourth spacer element and excessively large thicknesses of the ineffective diameter regions of the third lens and the fourth lens, which is not conducive to the molding of the third lens and the fourth lens, causing excessive lens stress and a decrease in the peak value of the central field of view in the modulation transfer function curve; the third spacer element and the fourth spacer element fail to effectively block the excess light in the outer field of view, causing the field curvature shift in the outer field of view.

[0062] In an exemplary embodiment, the spacer element group further includes a third auxiliary spacer element, which is disposed on the image side of the third spacer element and at least partially contacts the image side surface of the third spacer element; and the effective semi-apertures of the object side surface and the image side surface of the fourth lens are both smaller than those of any other lens in the lens group except the fourth lens. By providing a third auxiliary spacer element that at least partially contacts the image side surface of the third spacer element between the third lens and the fourth lens, it is possible to effectively block the stray light caused by the reflection from the large inclined surface of the third lens to the third spacer element and avoid the occurrence of the phenomenon of reflected stray light; and by controlling the effective semi-apertures of the object side surface and the image side surface of the fourth lens to be the smallest, with a longer structural area, it is possible to increase the effective area of the spacer element and thus effectively block the excess stray light.

[0063] In an exemplary embodiment, the optical imaging lens satisfies: -5.30 < d3bs / (R8 - R7) < -2.10, where d3bs is the inner diameter of the object side surface of the third auxiliary spacer element, R7 is the curvature radius of the object side surface of the fourth lens, and R8 is the curvature radius of the image side surface of the fourth lens. By controlling the above conditions, it is beneficial to control the curvature of the fourth lens, can constrain the optical power and distribute it reasonably, and improve the upper limit of the performance of the optical system; at the same time, the setting of the third auxiliary spacer element can effectively block the stray light passing through the large inclined surface of the third lens to the third spacer element and reduce the risk of stray light in imaging.

[0064] In an exemplary embodiment, the optical imaging lens satisfies: 1.70 < (D3bs - d3bs) / d3bm < 2.30, where D3bs is the outer diameter of the object side surface of the third auxiliary spacer element, d3bs is the inner diameter of the object side surface of the third auxiliary spacer element, and d3bm is the inner diameter of the image side surface of the third auxiliary spacer element. By restricting the inner and outer diameters of the third auxiliary spacer element, it is possible to effectively block the reflected stray light of the third spacer element and the internal reflection stray light incident from the fourth lens; at the same time, it avoids the risk of weld lines easily occurring during the molding of the effective diameter portion of the fourth lens, thereby affecting the imaging quality of the optical imaging lens.

[0065] In an exemplary embodiment, the optical imaging lens satisfies: 0.10 < (d4s - d3bm) / (R7 + R8) < 1.00, where d3bm is the inner diameter of the image side surface of the third auxiliary spacer element, R7 is the curvature radius of the object side surface of the fourth lens, and R8 is the curvature radius of the image side surface of the fourth lens. By controlling the curvature radii of the object side surface and the image side surface of the fourth lens, it is beneficial to improve the processability of the fourth lens, reduce the surface shape deviation, distortion and appearance problems caused by molding, and improve the production yield of the lens; at the same time, by controlling the inner diameter of the image side surface of the third auxiliary spacer element and the inner diameter of the object side surface of the fourth spacer element, it is possible to effectively block the reflected stray light generated by the large inclined surface of the third spacer element and the internal reflection stray light incident from the fourth lens, avoid the generation of stray light, and improve the imaging quality.

[0066] In an exemplary embodiment, the spacer element group further includes a first spacer element, the first spacer element is disposed between the first lens and the second lens and contacts the image side surface of the first lens; and the optical imaging lens satisfies: 0.30 < EP23 / (EP12 + T12) < 0.70, where EP12 is the distance between the first spacer element and the second spacer element along the optical axis direction, and T12 is the interval distance between the first lens and the second lens on the optical axis. By controlling the above conditions, it is possible to control the maximum thickness of the non-effective diameter region of the third lens within a suitable range, ensure the stability of lens molding, and at the same time indirectly control the center thicknesses of the first lens and the second lens, ensuring the processability and thickness ratio of the two lens molds, thereby being beneficial to the surface shape stability after the molding of the two lenses and helping to improve the quality and imaging quality of the lens.

[0067] In an exemplary embodiment, the object side surface of the fourth lens is convex, and the fourth lens is a meniscus lens near the optical axis; the fifth lens is a meniscus lens with a concave object side surface near the optical axis; and the optical imaging lens satisfies: 0.40 < f4 / f5 < 1.00, where f4 is the effective focal length of the fourth lens and f5 is the effective focal length of the fifth lens. By controlling the above conditions, the effective surface of the lens can be improved, that is, the smoothness and easy formability of the aspherical surface for transmitting effective light rays of the lens are improved, the surface shape of the fifth lens with a large curvature is prevented, the stability during lens assembly is improved, the assembly deformation is reduced, and the imaging quality of the lens is improved.

[0068] In an exemplary embodiment, the optical imaging lens satisfies: 1.30 < T45 / CP4 < 60.00. By controlling the maximum thickness of the fourth spacer element through the above conditional formula, it is beneficial to the distribution of the optical power of the fourth lens and the fifth lens. By making the spacing distance between the fourth lens and the fifth lens on the optical axis larger, controlling the thickness of the fourth spacer element within a reasonable range can indirectly limit the edge thickness of the fourth lens and the fifth lens, and thus can improve and optimize the assembly stability of the fourth lens and the fifth lens to a certain extent, which is beneficial to improving the quality and imaging quality of the lens. Exemplarily, 1.30 < T45 / CP4 < 30.10. Exemplarily, 1.30 < T45 / CP4 < 2.50.

[0069] In an exemplary embodiment, the optical imaging lens satisfies: -1.30 < (f2 + f4) / f3 < -0.30 and 1.30 < d2m / d3bs < 1.60, where 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, d2m is the inner diameter of the image side surface of the second spacer element, and d3bs is the inner diameter of the object side surface of the third auxiliary spacer element. By restricting the effective focal lengths of the second lens, the third lens, and the fourth lens through the above conditional formula, it is beneficial to control the surface shape of the lens, make the light rays transmit along the required path, and effectively control the internal reflection stray light passing through the fourth lens by controlling the inner diameter of the image side surface of the second spacer element and the inner diameter of the object side surface of the third auxiliary spacer element.

[0070] In an exemplary embodiment, the optical imaging lens satisfies: 0.70 < L / f < 0.80, where f is the total effective focal length of the optical imaging lens. By controlling the above conditions, not only can the optical imaging lens have good optical imaging performance, balance the optical distortion and chromatic aberration during imaging, but also the overall size of the lens is restricted, which is beneficial to realizing the miniaturization of the lens and making the whole machine more flexible and portable.

[0071] In an exemplary embodiment, the spacer element group further includes a first spacer element disposed between the first lens and the second lens and in contact with the image side surface of the first lens; and the optical imaging lens satisfies: -0.60 < f1 / f2 < -0.40 and 1.10 < d1m / d2s < 1.30, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, d1m is the inner diameter of the image side surface of the first spacer element, and d2s is the inner diameter of the object side surface of the second spacer element. By designing the focal length of the second lens and the inner and outer diameters of its adjacent spacer elements, the outer diameter size of the first lens is restricted, the bearing thickness of the lens barrel is ensured, the difficulty of molding and processing is reduced, the deformation amount of the lens barrel after assembly is also reduced, and at the same time, the stray light risk of imaging can be reduced by the light blocking effect of the second spacer.

[0072] In an exemplary embodiment, the optical imaging lens satisfies: 2.40 < EP34 / CT4 < 3.40, where EP34 is the distance between the third spacer element and the fourth spacer element along the optical axis direction, and CT4 is the central thickness of the fourth lens on the optical axis. By controlling the above conditions, both the central thickness and the edge thickness of the fourth lens are in a relatively reasonable range, the welding mark risk during the molding of the fourth lens is reduced, thereby reducing the stray light risk caused by the welding mark, improving the imaging quality of the lens, reducing the demolding force when the plastic lens is demolded, avoiding the surface shape deviation from the design curve caused by the demolding deformation of the lens, and improving the MTF quality of the lens.

[0073] In an exemplary embodiment, the optical imaging lens satisfies: 0.50 < |(d0m - d0s)| * FNO < 2.50, where d0s is the inner diameter of the object side end surface of the lens barrel, d0m is the inner diameter of the image side end surface of the lens barrel, and FNO is the aperture number of the optical imaging lens. By controlling the above conditions, while ensuring that the optical imaging lens has sufficient light input, the overall height of the lens barrel can be reduced, the outer diameter size of the lens can be reduced, which is more conducive to the molding of the internal lens, improving the overall performance stability, and enabling the optical imaging lens to have better imaging quality in a dim environment.

[0074] The second aspect of the present application provides an optical imaging lens, including a lens barrel, a lens group and a spacer element group accommodated in the lens barrel. The lens group includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence from the object side to the image side along the optical axis; the spacer element group includes a second spacer element, a third spacer element and a fourth spacer element. The second spacer element is disposed between the second lens and the third lens and contacts the image side surface of the second lens. The third spacer element is disposed between the third lens and the fourth lens and contacts the image side surface of the third lens. The fourth spacer element is disposed between the fourth lens and the fifth lens and contacts the image side surface of the fourth lens; and the optical imaging lens satisfies: 0.30 < (T34 + T45) / L < 0.50; 0.20 < (CP3 + CP4) / T45 < 1.10; 0.55 < EP23 / CP3 < 1.20; 2.40 < EP34 / CT4 < 3.40; where L is the maximum length of the lens barrel along the optical axis direction, T34 is the spacing distance between the third lens and the fourth lens on the optical axis, T45 is the spacing distance between the fourth lens and the fifth lens on the optical axis, CP3 is the maximum thickness of the third spacer element, CP4 is the maximum thickness of the fourth spacer element, EP23 is the distance between the second spacer element and the third spacer element along the optical axis direction, EP34 is the distance between the third spacer element and the fourth spacer element on the optical axis, and CT4 is the central thickness of the fourth lens on the optical axis.

[0075] In this embodiment, by controlling the ratio of the sum of the spacing distances between the third lens and the fourth lens and between the fourth lens and the fifth lens on the optical axis to the maximum length of the lens barrel along the optical axis direction, and setting spacer elements at the corresponding spacing distances, reasonably setting the thickness of the spacer elements and the maximum thickness of the non-effective diameter region of the lens, it is beneficial for light to smoothly transition to the last lens in the lens, making the central thickness and the thickness of the non-effective diameter region of the third lens and the fourth lens in a relatively reasonable range, reducing the risk of welding marks appearing during the molding of the third lens and the fourth lens, thereby reducing the risk of stray light caused by welding marks, improving the imaging quality of the lens, reducing the demolding force when the plastic lens is demolded, avoiding the deviation of the surface shape from the designed curve due to lens demolding deformation, and improving the MTF quality of the lens.

[0076] Those skilled in the art should understand that without departing from the technical solutions claimed in the present application, the number of lenses and spacer elements constituting the optical imaging lens can be changed to obtain the various results and advantages described in this specification.

[0077] The following further describes specific embodiments of the optical imaging lens applicable to the above embodiments with reference to the accompanying drawings. Specifically, refer to Figures 2A to 3C Describe the optical imaging lens according to Embodiment 1 and Embodiment 2 of the present application; refer to Figures 4A to 5C Describe the optical imaging lens according to Embodiment 3 and Embodiment 4 of the present application; refer to Figures 6A to 7C Describe the optical imaging lens according to Example 5 and Example 6 of the present application; refer to Figures 8A to 9C The optical imaging lenses according to Embodiment 7 and Embodiment 8 of the present application are described.

[0078] Example 1

[0079] Figure 2A FIG. 1 shows a schematic structural diagram of an optical imaging lens 1001 according to Example 1 of the present application. Figure 2A As shown, optical imaging lens 1001 includes a lens barrel P0, a five-element lens group disposed within lens barrel P0, and a spacer element group. The five-element lens group comprises, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. A stop STO is disposed on the object side of the first lens E1.

[0080] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex.

[0081] The spacer element group includes a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a third auxiliary spacer element P3b.

[0082] A first spacer P1 is positioned between the first lens E1 and the second lens E2, with the object-side surface of the first spacer P1 at least partially in contact with the image-side surface S2 of the first lens E1. A second spacer P2 is positioned between the second lens E2 and the third lens E3, with the object-side surface of the second spacer P2 at least partially in contact with the image-side surface S4 of the second lens E2. A third spacer P3 is positioned between the third lens E3 and the fourth lens E4, with the object-side surface of the third spacer P3 at least partially in contact with the image-side surface S6 of the third lens E3. A fourth spacer P4 is positioned between the fourth lens E4 and the fifth lens E5, with the object-side surface of the fourth spacer P4 at least partially in contact with the image-side surface S8 of the fourth lens E4. A third auxiliary spacer P3b is positioned on the image-side surface of the third spacer P3 and is at least partially in contact with the image-side surface of the third spacer P3.

[0083] In this example, a filter may be disposed between the fifth lens element E5 and the imaging surface S13 (not shown). The filter has an object-side surface S11 (not shown) and an image-side surface S12 (not shown). Light from the object sequentially passes through each of the surfaces S1 to S12 and is ultimately imaged on the imaging surface S13.

[0084] Table 1 shows basic parameters of the lens assembly of the optical imaging lens 1001 of Example 1, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0085]

[0086] Table 1

[0087] In this embodiment, the object-side surface and the image-side surface of any lens among the first lens E1 to the fifth lens E5 are both aspherical surfaces. The surface shape x of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0088]

[0089] Wherein, x is the distance vector height of the aspheric surface from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 shows the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 、A 30 .

[0090]

[0091]

[0092] Table 2

[0093] Example 2

[0094] Figure 2B FIG. 1 shows a schematic structural diagram of an optical imaging lens 1002 according to Example 2 of the present application. Figure 2BAs shown, optical imaging lens 1002 includes a lens barrel P0, a five-element lens group disposed within lens barrel P0, and a spacer group. The five-element lens group includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. A stop STO is disposed on the object side of first lens E1. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, and a third auxiliary spacer P3b.

[0095] The five-lens assembly of the optical imaging lens 1002 of this embodiment has the same structure as the five-lens assembly of the optical imaging lens 1001 in Example 1. The basic parameters thereof are detailed in Tables 1 and 2 and are not further described.

[0096] The difference between this embodiment and the first embodiment is that the lens barrel P0 and at least some elements in the spacer element group have different structural dimensions.

[0097] Figure 3A The axial chromatic aberration curves of the optical imaging lenses of Example 1 and Example 2 are shown, which represent the deviation of light of different wavelengths from the focal point behind the lens. Figure 3B Astigmatism curves of the optical imaging lenses of Examples 1 and 2 are shown, which represent meridional field curvature and sagittal field curvature. Figure 3C The distortion curves of the optical imaging lenses of Example 1 and Example 2 are shown, which represent the distortion values corresponding to different field angles. Figures 3A to 3C It can be seen that the optical imaging lenses provided in Example 1 and Example 2 can achieve good imaging quality.

[0098] Example 3

[0099] Figure 4A FIG. 2 shows a schematic structural diagram of an optical imaging lens 2001 according to Example 3 of the present application. Figure 4A As shown, optical imaging lens 2001 includes a lens barrel P0, a five-element lens group disposed within lens barrel P0, and a spacer element group. The five-element lens group comprises, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. A stop STO is disposed on the object side of the first lens E1.

[0100] The first lens E1 has positive optical power, with its object-side surface S1 being spherical and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex.

[0101] The spacer element group includes a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, and a third auxiliary spacer element P3b.

[0102] A first spacer P1 is positioned between the first lens E1 and the second lens E2, with the object-side surface of the first spacer P1 at least partially in contact with the image-side surface S2 of the first lens E1. A second spacer P2 is positioned between the second lens E2 and the third lens E3, with the object-side surface of the second spacer P2 at least partially in contact with the image-side surface S4 of the second lens E2. A third spacer P3 is positioned between the third lens E3 and the fourth lens E4, with the object-side surface of the third spacer P3 at least partially in contact with the image-side surface S6 of the third lens E3. A fourth spacer P4 is positioned between the fourth lens E4 and the fifth lens E5, with the object-side surface of the fourth spacer P4 at least partially in contact with the image-side surface S8 of the fourth lens E4. A third auxiliary spacer P3b is positioned on the image-side surface of the third spacer P3 and is at least partially in contact with the image-side surface of the third spacer P3.

[0103] In this example, a filter may be disposed between the fifth lens element E5 and the imaging surface S13 (not shown). The filter has an object-side surface S11 (not shown) and an image-side surface S12 (not shown). Light from the object sequentially passes through each of the surfaces S1 to S12 and is ultimately imaged on the imaging surface S13.

[0104] Table 3 shows the basic parameters of the lens group of the optical imaging lens 2001 of Example 3, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0105]

[0106] Table 3

[0107] In this embodiment, the object side surface and the image side surface of any lens from the first lens E1 to the fifth lens E5 are both aspherical surfaces. Table 4 lists the high-order coefficients A4, A6, A8, A9, A10, A20, A30, A40, A60, A70, A80, A90, A100 that can be used for the aspherical surfaces S1 to S10 in Example 3. 10 、A 12 、A 14 、A 16 、A 18、A 20 、A 22 、A 24 、A 26 、A 28 、A 30 .

[0108]

[0109]

[0110] Table 4

[0111] Example 4

[0112] Figure 4B FIG. 2 shows a schematic structural diagram of an optical imaging lens 2002 according to Example 4 of the present application. Figure 4B As shown, optical imaging lens 2002 includes a lens barrel P0, a five-element lens group disposed within lens barrel P0, and a spacer group. The five-element lens group includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. A stop STO is disposed between the second lens E2 and the third lens E3. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, and a third auxiliary spacer P3b.

[0113] The five-lens assembly of the optical imaging lens 2002 of this embodiment has the same structure as the five-lens assembly of the optical imaging lens 2001 in Example 3. The basic parameters thereof are detailed in Tables 3 and 4 and are not further described.

[0114] The difference between this embodiment and the third embodiment is that the lens barrel P0 and at least some elements in the spacer element group have different structural dimensions.

[0115] Figure 5A The axial chromatic aberration curves of the optical imaging lenses of Examples 3 and 4 are shown, which indicate the deviation of light rays of different wavelengths from the focal point behind the lens. Figure 5B Astigmatism curves of the optical imaging lenses of Examples 3 and 4 are shown, which represent meridional field curvature and sagittal field curvature. Figure 5C The distortion curves of the optical imaging lenses of Example 3 and Example 4 are shown, which represent the distortion values corresponding to different field angles. Figures 5A to 5C It can be seen that the optical imaging lenses provided in Examples 3 and 4 can achieve good imaging quality.

[0116] Example 5

[0117] Figure 6AFIG. 3 shows a schematic structural diagram of an optical imaging lens 3001 according to Example 5 of the present application. Figure 6A As shown, optical imaging lens 3001 includes a lens barrel P0, a five-element lens group disposed within lens barrel P0, and a spacer element group. The five-element lens group comprises, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. A stop STO is disposed on the object side of the first lens E1.

[0118] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex.

[0119] The spacer element group includes a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a third auxiliary spacer element P3b, and a fourth auxiliary spacer element P4b.

[0120] A first spacer P1 is positioned between the first lens E1 and the second lens E2, with the object-side surface of the first spacer P1 at least partially in contact with the image-side surface S2 of the first lens E1. A second spacer P2 is positioned between the second lens E2 and the third lens E3, with the object-side surface of the second spacer P2 at least partially in contact with the image-side surface S4 of the second lens E2. A third spacer P3 is positioned between the third lens E3 and the fourth lens E4, with the object-side surface of the third spacer P3 at least partially in contact with the image-side surface S6 of the third lens E3. A fourth spacer P4 is positioned between the fourth lens E4 and the fifth lens E5, with the object-side surface of the fourth spacer P4 at least partially in contact with the image-side surface S8 of the fourth lens E4. A third auxiliary spacer P3b is positioned on the image-side surface of the third spacer P3 and is in at least partial contact with the image-side surface of the third spacer P3. A fourth auxiliary spacer P4b is positioned on the image-side surface of the fourth spacer P4 and is in at least partial contact with the image-side surface of the fourth spacer P4.

[0121] In this example, a filter may be disposed between the fifth lens element E5 and the imaging surface S13 (not shown). The filter has an object-side surface S11 (not shown) and an image-side surface S12 (not shown). Light from the object sequentially passes through each of the surfaces S1 to S12 and is ultimately imaged on the imaging surface S13.

[0122] Table 5 shows the basic parameters of the lens group of the optical imaging lens 3001 of Example 5, where the units of curvature radius and thickness / distance are all millimeters (mm).

[0123]

[0124]

[0125] Table 5

[0126] In this embodiment, the object side surface and the image side surface of any lens from the first lens E1 to the fifth lens E5 are both aspherical surfaces. Table 6 lists the high-order coefficients A4, A6, A8, A9, A10, A20, A30, A40, A60, A70, A80, A90, A100 that can be used for the aspherical surfaces S1 to S10 in Example 5. 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 、A 30 .

[0127] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.93E-01 -6.40E-02 -8.09E-03 1.24E-03 4.26E-04 -1.27E-04 -1.72E-04 S2 -3.02E-02 7.21E-03 1.69E-03 3.39E-03 -1.97E-03 6.46E-04 -1.27E-04 S3 2.14E-01 1.12E-02 -1.72E-02 -3.21E-04 -3.98E-03 7.96E-04 9.90E-05 S4 2.64E-01 2.85E-02 -2.26E-02 -6.79E-03 -2.94E-03 1.28E-03 9.95E-04 S5 1.51E-01 5.01E-02 -7.86E-03 -7.17E-03 -4.17E-03 -1.47E-03 -3.13E-04 S6 -1.35E-01 7.34E-03 -7.81E-03 -3.08E-03 -8.31E-04 3.05E-04 2.80E-04 S7 -2.92E-01 3.42E-03 -3.10E-04 -3.52E-04 1.44E-04 -5.79E-05 3.35E-05 S8 -4.39E-01 4.02E-02 -3.65E-03 2.40E-05 1.61E-04 -6.65E-05 4.80E-06 S9 1.02E+00 -5.30E-02 -2.31E-02 8.96E-03 -4.29E-03 1.45E-03 -1.32E-03 S10 -5.81E-02 1.21E-01 -7.30E-02 1.36E-02 -7.38E-03 4.77E-03 -3.14E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 2.85E-05 5.13E-05 1.11E-05 -2.41E-05 -1.34E-05 1.68E-07 1.45E-06 S2 2.26E-04 -1.69E-04 2.93E-05 -2.03E-05 2.88E-05 -1.32E-05 1.65E-06 S3 3.52E-04 -2.05E-04 3.29E-05 -2.12E-06 3.67E-05 -2.18E-05 3.55E-06 S4 4.11E-04 -1.82E-04 -7.91E-05 -9.44E-06 3.10E-05 -1.09E-05 1.31E-06 S5 3.09E-05 1.15E-04 1.03E-04 4.54E-05 7.26E-07 -9.33E-06 -4.66E-07 S6 3.97E-05 -2.78E-05 -2.61E-05 5.57E-06 1.76E-05 8.26E-06 -6.20E-06 S7 -2.78E-05 1.71E-05 -1.14E-05 6.69E-06 -6.23E-06 4.40E-06 -9.33E-07 S8 5.95E-06 -9.28E-06 3.81E-06 2.16E-07 1.95E-06 -5.73E-07 -9.64E-08 S9 3.73E-04 -1.88E-04 4.40E-04 -1.33E-04 -1.86E-05 1.30E-05 -3.11E-06 S10 9.49E-04 -1.31E-03 8.29E-04 1.12E-04 1.32E-04 -1.61E-04 2.59E-05

[0128] Table 6

[0129] Example 6

[0130] Figure 6B FIG. 3 shows a schematic structural diagram of an optical imaging lens 3002 according to Example 6 of the present application. Figure 6B As shown, optical imaging lens 3002 includes a lens barrel P0, a five-element lens group disposed within lens barrel P0, and a spacer group. The five-element lens group includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. A stop STO is disposed on the object side of first lens E1. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a third auxiliary spacer P3b, and a fourth auxiliary spacer P4b.

[0131] The five-lens group of the optical imaging lens 3002 of this embodiment has the same structure as the five-lens group of the optical imaging lens 3001 in Example 5. The basic parameters thereof are detailed in Tables 5 and 6 and are not repeated here.

[0132] The difference between this embodiment and embodiment 5 is that the lens barrel P0 and at least some elements in the spacer element group have different structural dimensions.

[0133] Figure 7A The axial chromatic aberration curves of the optical imaging lenses of Examples 5 and 6 are shown, which indicate the deviation of light of different wavelengths from the focal point behind the lens. Figure 7B Astigmatism curves of the optical imaging lenses of Examples 5 and 6 are shown, which represent meridional field curvature and sagittal field curvature. Figure 7C The distortion curves of the optical imaging lenses of Example 5 and Example 6 are shown, which represent the distortion values corresponding to different field angles. 7A to 7C It can be seen that the optical imaging lenses provided in Examples 5 and 6 can achieve good imaging quality.

[0134] Example 7

[0135] Figure 8A FIG. 4 shows a schematic structural diagram of an optical imaging lens 4001 according to Example 7 of the present application. Figure 8A As shown, optical imaging lens 4001 includes a lens barrel P0, a five-element lens group disposed within lens barrel P0, and a spacer element group. The five-element lens group comprises, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. A stop STO is disposed on the object side of the first lens E1.

[0136] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex.

[0137] The spacer element group includes a first spacer element P1, a second spacer element P2, a third spacer element P3, a fourth spacer element P4, a third auxiliary spacer element P3b, and a fourth auxiliary spacer element P4b.

[0138] A first spacer P1 is positioned between the first lens E1 and the second lens E2, with the object-side surface of the first spacer P1 at least partially in contact with the image-side surface S2 of the first lens E1. A second spacer P2 is positioned between the second lens E2 and the third lens E3, with the object-side surface of the second spacer P2 at least partially in contact with the image-side surface S4 of the second lens E2. A third spacer P3 is positioned between the third lens E3 and the fourth lens E4, with the object-side surface of the third spacer P3 at least partially in contact with the image-side surface S6 of the third lens E3. A fourth spacer P4 is positioned between the fourth lens E4 and the fifth lens E5, with the object-side surface of the fourth spacer P4 at least partially in contact with the image-side surface S8 of the fourth lens E4. A third auxiliary spacer P3b is positioned on the image-side surface of the third spacer P3 and is in at least partial contact with the image-side surface of the third spacer P3. A fourth auxiliary spacer P4b is positioned on the image-side surface of the fourth spacer P4 and is in at least partial contact with the image-side surface of the fourth spacer P4.

[0139] In this example, a filter may be disposed between the fifth lens element E5 and the imaging surface S13 (not shown). The filter has an object-side surface S11 (not shown) and an image-side surface S12 (not shown). Light from the object sequentially passes through each of the surfaces S1 to S12 and is ultimately imaged on the imaging surface S13.

[0140] Table 7 shows the basic parameters of the lens group of the optical imaging lens 4001 of Example 7, where the units of curvature radius and thickness / distance are all millimeters (mm).

[0141]

[0142]

[0143] Table 7

[0144] In this embodiment, the object side surface and the image side surface of any lens from the first lens E1 to the fifth lens E5 are both aspherical surfaces. Table 8 lists the high-order coefficients A4, A6, A8, A9, A10, A20, A30, A40, A60, A70, A80, A90, A100 that can be used for the aspherical surfaces S1 to S10 in Example 7. 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 、A 30 .

[0145] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.92E-01 -6.99E-02 -1.24E-02 -1.11E-03 -3.77E-04 -3.93E-04 -2.90E-04 S2 -9.14E-03 2.70E-02 -7.53E-03 4.20E-03 -3.76E-03 1.51E-03 -9.29E-04 S3 2.20E-01 1.89E-02 -2.11E-02 7.52E-04 -4.87E-03 1.68E-03 -6.24E-04 S4 2.93E-01 1.96E-02 -2.66E-02 -6.59E-03 -2.13E-03 1.74E-03 7.64E-04 S5 2.01E-01 6.00E-02 -1.27E-02 -7.92E-03 -5.19E-03 -1.84E-03 -5.14E-04 S6 -1.17E-01 9.60E-03 -1.18E-02 -3.32E-03 -1.05E-03 3.75E-04 3.68E-04 S7 -2.84E-01 1.73E-04 -3.70E-04 -3.01E-04 8.19E-05 -4.49E-05 3.06E-05 S8 -4.07E-01 3.13E-02 -2.39E-03 -1.66E-06 4.38E-05 1.40E-05 -3.14E-05 S9 6.95E-01 9.62E-03 -3.00E-02 7.10E-03 -4.32E-03 9.00E-04 -1.32E-03 S10 -3.84E-01 1.93E-01 -7.47E-02 1.43E-02 -1.10E-02 5.05E-03 -4.55E-03 Face number A18 A20 A22 A24 A26 A28 A30 S1 -3.81E-05 2.47E-05 1.92E-05 -2.23E-05 -2.71E-05 -8.55E-06 5.98E-06 S2 8.29E-04 -6.27E-04 3.30E-04 -2.26E-04 1.28E-04 -3.36E-05 3.55E-06 S3 8.66E-04 -5.69E-04 2.85E-04 -1.47E-04 8.94E-05 -1.87E-05 -1.54E-06 S4 3.60E-04 -2.11E-04 1.52E-05 -1.28E-05 1.25E-05 -1.29E-05 3.38E-06 S5 4.50E-05 1.71E-04 1.58E-04 5.28E-05 -5.44E-06 -1.13E-05 -3.54E-07 S6 9.31E-05 -4.73E-05 -5.74E-05 -3.34E-06 2.86E-05 1.66E-05 -1.02E-05 S7 -2.17E-05 1.75E-05 -1.51E-05 8.52E-06 -8.46E-06 5.96E-06 -1.24E-06 S8 2.52E-05 -1.82E-05 8.14E-06 -5.60E-06 2.50E-06 -2.12E-07 -3.19E-08 S9 9.97E-04 -2.98E-04 4.69E-04 -1.53E-04 -3.78E-05 -1.97E-06 6.26E-06 S10 2.37E-03 -1.00E-03 8.56E-04 7.59E-06 6.55E-05 -1.89E-04 4.95E-05

[0146] Table 8

[0147] Example 8

[0148] Figure 8B FIG. 4 shows a schematic structural diagram of an optical imaging lens 4002 according to Example 8 of the present application. Figure 8B As shown, optical imaging lens 4002 includes a lens barrel P0, a five-element lens group disposed within lens barrel P0, and a spacer group. The five-element lens group includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, and a fifth lens E5. A stop STO is disposed on the object side of first lens E1. The spacer group includes a first spacer P1, a second spacer P2, a third spacer P3, a fourth spacer P4, a third auxiliary spacer P3b, and a fourth auxiliary spacer P4b.

[0149] The five-lens group of the optical imaging lens 4002 of this embodiment has the same structure as the five-lens group of the optical imaging lens 4001 in Example 7. The basic parameters thereof are detailed in Tables 7 and 8 and are not repeated here.

[0150] The difference between this embodiment and Embodiment 7 is that the lens barrel P0 and at least some elements in the spacer element group have different structural dimensions.

[0151] Figure 9A The axial chromatic aberration curves of the optical imaging lenses of Examples 7 and 8 are shown, which indicate the deviation of light of different wavelengths from the focal point behind the lens. Figure 9B Astigmatism curves of the optical imaging lenses of Examples 7 and 8 are shown, which represent meridional field curvature and sagittal field curvature. Figure 9C The distortion curves of the optical imaging lenses of Example 7 and Example 8 are shown, which represent the distortion values corresponding to different field angles. Figures 9A to 9C It can be seen that the optical imaging lenses provided in Examples 7 and 8 can achieve good imaging quality.

[0152] Table 9 shows the parameter values of FNO, f, f1, f2, f3, f4, and f5 of each embodiment in Examples 1-8.

[0153] In Table 9, the units of f, f1, f2, f3, f4, and f5 are all millimeters (mm).

[0154]

[0155] Table 9

[0156] Table 10 shows the values of the parameters of at least some elements in the lens barrel P0 and the spacer element group in each embodiment 1-8. Among them, some parameters can be calculated according to Figure 1The units of the parameters listed in Table 10 are all millimeters (mm).

[0157]

[0158]

[0159] Table 10

[0160] In summary, the optical imaging lenses in Examples 1-8 satisfy the relationship shown in Table 11.

[0161] Conditional formula / Example 1 2 3 4 5 6 7 8 (T34+T45) / L 0.48 0.47 0.46 0.45 0.38 0.37 0.42 0.42 (CP3+CP4) / T45 0.86 0.82 0.96 0.95 1.08 0.29 0.31 0.95 d3s / d3m 1.17 0.84 1.14 0.82 1.00 0.94 1.17 0.94 d4s / d4m 0.73 0.84 0.62 0.84 0.93 0.87 1.00 1.06 d3bs / (R8-R7) -3.54 -3.52 -5.25 -5.13 -2.19 -2.20 -2.61 -2.64 (D3bs-d3bs) / d3bm 1.76 1.86 1.73 1.87 2.15 2.26 1.89 1.94 EP23 / (EP12+T12) 0.63 0.42 0.57 0.54 0.40 0.47 0.50 0.47 f4 / f5 0.91 0.91 0.74 0.74 0.46 0.46 0.61 0.61 T45 / CP4 2.28 2.48 1.45 1.43 1.32 60.00 30.07 1.47 (f2+f4) / f3 -0.79 -0.79 -0.39 -0.39 -1.22 -1.22 -0.79 -0.79 d2m / d3bs 1.45 1.46 1.36 1.38 1.55 1.55 1.48 1.45 L / f 0.78 0.79 0.78 0.79 0.79 0.79 0.79 0.79 f1 / f2 -0.54 -0.54 -0.49 -0.49 -0.54 -0.54 -0.49 -0.49 d1m / d2s 1.13 1.15 1.17 1.21 1.16 1.15 1.17 1.17 (d4s-d3bm) / (R7+R8) 0.44 0.58 0.35 0.82 0.88 0.85 0.14 0.99 EP34 / CT4 3.23 2.82 2.85 2.69 2.42 3.35 2.71 2.71 |(d0m-d0s)|*FNO 0.56 1.40 0.74 1.92 1.60 1.06 1.64 2.47 EP23 / CP3 0.72 0.61 0.88 1.07 0.88 1.18 0.90 0.86

[0162] Table 11

[0163] The present application also provides an electronic device equipped with the optical imaging lens described above. The electronic device can be a wearable device such as a VR helmet, smart watch, or smart glasses, a standalone imaging device such as a digital camera, or a mobile electronic device such as a mobile phone.

[0164] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical imaging lens, characterized in that: Comprising: A lens group, including a first lens with a positive optical power, a second lens with a negative optical power, a third lens with a positive optical power, a fourth lens with a negative optical power, and a fifth lens with a negative optical power, arranged in sequence from the object side to the image side along the optical axis; An interval element group, including a second interval element, a third interval element, and a fourth interval element. The second interval element is placed between the second lens and the third lens and contacts the image side surface of the second lens. The third interval element is placed between the third lens and the fourth lens and contacts the image side surface of the third lens. The fourth interval element is placed between the fourth lens and the fifth lens and contacts the image side surface of the fourth lens; And A lens barrel, accommodating the lens group and the interval element group; The optical imaging lens satisfies: 0.30 < (T34 + T45) / L < 0.50; 0.20 < (CP3 + CP4) / T45 < 1.10; 0.55 < EP23 / CP3 < 1.20; 0.80 < d3s / d3m < 1.20; and 0.60 < d4s / d4m < 1.10; Wherein, L is the maximum length of the lens barrel along the optical axis direction, T34 is the interval distance between the third lens and the fourth lens on the optical axis, T45 is the interval distance between the fourth lens and the fifth lens on the optical axis, CP3 is the maximum thickness of the third interval element, CP4 is the maximum thickness of the fourth interval element, EP23 is the distance between the second interval element and the third interval element along the optical axis direction, d3s is the inner diameter of the object side surface of the third interval element, d3m is the inner diameter of the image side surface of the third interval element, d4s is the inner diameter of the object side surface of the fourth interval element, and d4m is the inner diameter of the image side surface of the fourth interval element.

2. The optical imaging lens according to claim 1, wherein: The interval element group further includes a third auxiliary interval element, which is placed on the image side of the third interval element and contacts the image side surface of the third interval element; and The effective semi-apertures of the object side surface and the image side surface of the fourth lens are both smaller than those of any one lens in the lens group except the fourth lens.

3. The optical imaging lens according to claim 2, wherein: The optical imaging lens satisfies: -5.30 < d3bs / (R8 - R7) < -2.10, where d3bs is the inner diameter of the object side surface of the third auxiliary interval element, R7 is the curvature radius of the object side surface of the fourth lens, and R8 is the curvature radius of the image side surface of the fourth lens.

4. The optical imaging lens according to claim 2, wherein: The optical imaging lens satisfies: 1.70 < (D3bs - d3bs) / d3bm < 2.30, where D3bs is the outer diameter of the object side surface of the third auxiliary interval element, d3bs is the inner diameter of the object side surface of the third auxiliary interval element, and d3bm is the inner diameter of the image side surface of the third auxiliary interval element.

5. The optical imaging lens according to claim 2, wherein: The optical imaging lens satisfies: 0.10 < (d4s - d3bm) / (R7 + R8) < 1.00, where d3bm is the inner diameter of the image side of the third auxiliary spacer element, R7 is the curvature radius of the object side of the fourth lens, and R8 is the curvature radius of the image side of the fourth lens.

6. The optical imaging lens according to any one of claims 1 to 5, wherein: The spacer element group further includes a first spacer element, which is disposed between the first lens and the second lens and contacts the image side of the first lens; and The optical imaging lens satisfies: 0.30 < EP23 / (EP12 + T12) < 0.70, where EP12 is the distance between the first spacer element and the second spacer element along the optical axis direction, and T12 is the distance between the first lens and the second lens on the optical axis.

7. The optical imaging lens according to any one of claims 1 to 5, wherein: The object side of the fourth lens is convex, and the fourth lens is a meniscus lens near the optical axis; The fifth lens is a meniscus lens with a concave object side near the optical axis; and The optical imaging lens satisfies: 0.40 < f4 / f5 < 1.00, where f4 is the effective focal length of the fourth lens and f5 is the effective focal length of the fifth lens.

8. The optical imaging lens according to claim 7, wherein: The optical imaging lens satisfies: 1.30 < T45 / CP4 < 60.

00.

9. The optical imaging lens according to any one of claims 2 to 5, wherein: The optical imaging lens satisfies: -1.30 < (f2 + f4) / f3 < -0.30 and 1.30 < d2m / d3bs < 1.60, where 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, d2m is the inner diameter of the image side of the second spacer element, and d3bs is the inner diameter of the object side of the third auxiliary spacer element.

10. The optical imaging lens according to any one of claims 1 to 5, wherein: The optical imaging lens satisfies: 0.70 < L / f < 0.80, where f is the total effective focal length of the optical imaging lens.

11. The optical imaging lens according to any one of claims 1 to 5, wherein: The spacer element group further includes a first spacer element, which is disposed between the first lens and the second lens and contacts the image side of the first lens; and The optical imaging lens satisfies: -0.60 < f1 / f2 < -0.40 and 1.10 < d1m / d2s < 1.30, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, d1m is the inner diameter of the image side of the first spacer element, and d2s is the inner diameter of the object side of the second spacer element.

12. The optical imaging lens according to any one of claims 1 to 5, wherein: The optical imaging lens satisfies: 2.40 < EP34 / CT4 < 3.40, where EP34 is the distance between the third spacer element and the fourth spacer element along the optical axis direction, and CT4 is the central thickness of the fourth lens on the optical axis.

13. The optical imaging lens according to any one of claims 1 to 5, wherein: The optical imaging lens satisfies: 0.50 < |(d0m - d0s)| * FNO < 2.50, where d0s is the inner diameter of the object side end face of the lens barrel, d0m is the inner diameter of the image side end face of the lens barrel, and FNO is the aperture number of the optical imaging lens.

14. The optical imaging lens according to any one of claims 1 to 5, wherein: There is a spacing distance between any adjacent lenses among the first to fifth lenses on the optical axis, and the spacing distance increases sequentially from the object side to the image side; and At least one spacer element is provided between adjacent lenses.

Images