Optical imaging lens

Abstract

The present application provides an optical imaging lens, comprising a lens barrel, a lens group and a spacer assembly housed within the lens barrel; 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 an optical axis from the object side to the image side; the spacer assembly comprises at least two spacer elements disposed between the fourth lens and the fifth lens; the air gap on the optical axis between the fourth lens and the fifth lens is greater than the sum of the air gap on the optical axis between the first lens and the second lens, the air gap on the optical axis between the second lens and the third lens, and the air gap on the optical axis between the fifth lens and the sixth lens; the optical imaging lens satisfies the following conditions: 19.15 mm < d0 m / (L / f) < 20.20 mm; and 0.90 < (EP34 + EP45) / T45 < 2.00.

Description

Technical Field

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

[0002] In recent years, with the rapid development of smartphone photography technology and users' increasing demands for mobile phone photography, especially the demand for imaging effects of scenes such as distant views and close-ups of people, telephoto lenses that can show distant views and close-up details have been widely used in mobile phone lenses.

[0003] However, the focal length of traditional mobile phone telephoto lenses is generally limited by the assembly stability and reliability of the spacer elements between the lenses, making it difficult to achieve a higher effective focal length. Although some multi-element lenses currently exist on the market, they can provide a larger effective focal length to ensure both the imaging surface and telephoto performance. However, due to the large gaps between some lenses within the lens, light is easily reflected in the non-transparent areas between the two lenses with large gaps, generating arc-shaped stray light, which affects the imaging quality of the telephoto lens. Summary of the Invention

[0004] One advantage of the present application is that it provides an optical imaging lens that can solve the problem that the effective focal length of a traditional mobile phone telephoto lens is limited by the assembly stability and reliability of the spacer elements between the lenses.

[0005] On the one hand, the present application provides an optical imaging lens, comprising a lens barrel, a lens group and a spacer assembly housed within the lens barrel; 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 an optical axis from the object side to the image side; the spacer assembly comprises at least two spacer elements disposed between the fourth lens and the fifth lens; the spacer assembly further comprises a third spacer element disposed on the image side of the third lens and in contact with the image side surface of the third lens, a fourth spacer element disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, and a fifth spacer element disposed on the image side of the fifth lens and in contact with the image side surface of the fifth lens; an air gap on the optical axis between the fourth lens and the fifth lens is greater than the sum of the air gap on the optical axis between the first lens and the second lens, the air gap on the optical axis between the second lens and the third lens, and the air gap on the optical axis between the fifth lens and the sixth lens; the optical imaging lens satisfies:

[0006] 19.15 mm < d0 m / (L / f) < 20.20 mm; and

[0007] 0.90<(EP34+EP45) / T45<2.00;

[0008] Wherein, d0m is the inner diameter of the image side surface of the lens barrel, L is the maximum height of the lens barrel, f is the effective focal length of the optical imaging lens, EP34 is the spacing distance between the third spacing element and the fourth spacing element along the optical axis, EP45 is the spacing distance between the fourth spacing element and the fifth spacing element along the optical axis, and T45 is the air gap between the fourth lens and the fifth lens on the optical axis.

[0009] In some embodiments of the present application, the spacer assembly further includes a fourth auxiliary spacer element disposed on the image side of the fourth spacer element and in contact with the image side surface of the fourth spacer element, and the optical imaging lens satisfies:

[0010] 0.20<(CP4+CP4b) / (EP34+EP45)<0.70;

[0011] Among them, CP4 is the maximum thickness of the fourth spacer element, CP4b is the maximum thickness of the fourth auxiliary spacer element, EP34 is the spacing distance between the third spacer element and the fourth spacer element along the optical axis, and EP45 is the spacing distance between the fourth spacer element and the fifth spacer element along the optical axis.

[0012] In some embodiments of the present application, the optical imaging lens meets the following requirements:

[0013] 1.15<EP45 / (CP4+CP4b)<3.10;

[0014] EP45 is the spacing distance between the fourth spacing element and the fifth spacing element along the optical axis, CP4 is the maximum thickness of the fourth spacing element, and CP4b is the maximum thickness of the fourth auxiliary spacing element.

[0015] In some embodiments of the present application, the optical imaging lens meets the following requirements:

[0016] 1.20<D5s / d4m<2.45;

[0017] Wherein, D5s is the outer diameter of the object-side surface of the fifth spacer element, and d4m is the inner diameter of the image-side surface of the fourth spacer element.

[0018] In some embodiments of the present application, the optical imaging lens meets the following requirements:

[0019] -4.40mm -1 <f4 / CT4 / d4s<-1.75mm -1 ;

[0020] Wherein, f4 is the effective focal length of the fourth lens, CT4 is the center thickness of the fourth lens, and d4s is the inner diameter of the object side surface of the fourth spacer element.

[0021] In some embodiments of the present application, the optical imaging lens meets the following requirements:

[0022] 0.20<T45 / L<0.40; and

[0023] 0.65<d5s / d4m<1.65;

[0024] Wherein, T45 is the air gap between the fourth lens and the fifth lens on the optical axis, L is the maximum height of the lens barrel, d5s is the inner diameter of the object side surface of the fifth spacing element, and d4m is the inner diameter of the image side surface of the fourth spacing element.

[0025] In some embodiments of the present application, the optical imaging lens meets the following requirements:

[0026] 5.25<f1234 / (d0s-d4s)<7.65;

[0027] Wherein, f1234 is the combined focal length of the first lens, the second lens, the third lens and the fourth lens, d0s is the inner diameter of the object side of the lens barrel, and d4s is the inner diameter of the object side of the fourth spacer element.

[0028] In some embodiments of the present application, the spacer element further includes a first spacer element disposed on the image side of the first lens and in contact with the image-side surface of the first lens, and a first auxiliary spacer element disposed on the image side of the first spacer element and in contact with the image-side surface of the first spacer element. The optical imaging lens satisfies:

[0029] 4.75<d1bs / CP1b<6.50;

[0030] Wherein, d1bs is the inner diameter of the object side of the first auxiliary spacer element, and CP1b is the maximum thickness of the first auxiliary spacer element.

[0031] In some embodiments of the present application, the optical imaging lens meets the following requirements:

[0032] 2.20<D1bs / d1bs+D1bm / d1bm<2.55;

[0033] Wherein, D1bs is the outer diameter of the object side surface of the first auxiliary spacer element, d1bs is the inner diameter of the object side surface of the first auxiliary spacer element, D1bm is the outer diameter of the image side surface of the first auxiliary spacer element, and d1bm is the inner diameter of the image side surface of the first auxiliary spacer element.

[0034] In some embodiments of the present application, the optical imaging lens meets the following requirements:

[0035] 40.20<R1 / (EP01-CT1)<57.85;

[0036] Wherein, R1 is the curvature radius of the object side surface of the first lens, EP01 is the spacing distance from the object side surface of the lens barrel to the object side surface of the first spacer element along the optical axis, and CT1 is the center thickness of the first lens.

[0037] In some embodiments of the present application, the optical imaging lens meets the following requirements:

[0038] 2.00<T45 / (EP45 / n)<6.05;

[0039] Wherein, T45 is the air gap between the fourth lens and the fifth lens on the optical axis, EP45 is the spacing distance between the fourth spacer element and the fifth spacer element along the optical axis, and n is the number of spacer elements between the fourth lens and the fifth lens, where n is 2, 3, 4 or 5.

[0040] In some embodiments of the present application, the optical imaging lens meets the following requirements:

[0041] 2.00mm≤d0m / (f×tan(Semi-FOV))<2.30mm;

[0042] Wherein, d0m is the inner diameter of the image side of the lens barrel, f is the effective focal length of the optical imaging lens, and Semi-FOV is half of the maximum field of view angle of the optical imaging lens.

[0043] In some embodiments of the present application, the optical imaging lens meets the following requirements:

[0044] 1.90<∑CP4 / (SG42+SG51)<4.8;

[0045] Wherein, ∑CP4 is the sum of the maximum thicknesses of all the spacer elements between the fourth lens and the fifth lens, SG42 is the distance along the optical axis from the intersection of the image side surface of the fourth lens and the optical axis to the object side surface of the spacer element in contact with the image side surface of the fourth lens, and SG51 is the distance along the optical axis from the intersection of the object side surface of the fifth lens and the optical axis to the image side surface of the spacer element in contact with the object side surface of the fifth lens.

[0046] On the other hand, the present application provides an optical imaging lens, comprising a lens barrel and a lens group and a spacer assembly housed in the lens barrel; 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 from the object side to the image side along the optical axis; wherein the first lens has positive focal power and the object side surface of the first lens is convex, the second lens has positive focal power and the object side surface of the second lens is convex, and the fourth lens has negative focal power; the spacer assembly comprises at least two spacer elements arranged between the fourth lens and the fifth lens; the spacer assembly The optical imaging lens further includes a third spacer element disposed on the image side of the third lens and in contact with the image side surface of the third lens, a fourth spacer element disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, and a fifth spacer element disposed on the image side of the fifth lens and in contact with the image side surface of the fifth lens; an air gap on the optical axis between the fourth lens and the fifth lens is greater than the sum of an air gap on the optical axis between the first lens and the second lens, an air gap on the optical axis between the second lens and the third lens, and an air gap on the optical axis between the fifth lens and the sixth lens; and the optical imaging lens satisfies:

[0047] 2.55<T45 / (CT4+CT5)<3.60; and

[0048] 1.10<EP45 / (CP4+EP34)<3.75;

[0049] Among them, T45 is the air gap between the fourth lens and the fifth lens on the optical axis, CT4 is the center thickness of the fourth lens, CT5 is the center thickness of the fifth lens, EP45 is the spacing distance between the fourth spacer element and the fifth spacer element along the optical axis, CP4 is the maximum thickness of the fourth spacer element, and EP34 is the spacing distance between the third spacer element and the fourth spacer element along the optical axis.

[0050] In summary, the optical imaging lens of the present application is a six-element lens with long focal length and large image area technical characteristics. The air gap between the fourth lens and the fifth lens on the optical axis is greater than the sum of the air gap between the first lens and the second lens on the optical axis, the air gap between the second lens and the third lens on the optical axis, and the air gap between the fifth lens and the sixth lens on the optical axis. In addition, the barrel parameters and the effective focal length of the lens satisfy the relationship 19.15mm<d0m / (L / f)<20.20mm. However, due to the large gap between the fourth and fifth lenses, light is easily reflected from the non-transparent areas within the fourth and fifth lenses, generating arc-shaped stray light. By constraining the distances between the third and fourth spacer elements, the distances between the fourth and fifth spacer elements, and the air gap on the optical axis between the fourth and fifth lenses using the equation 0.90 < (EP34 + EP45) / T45 < 2.00, the thickness of the non-transparent area of ​​the fourth and fifth lenses, as well as the total thickness of the spacer elements between the fourth and fifth lenses, can be controlled. Thinner non-transparent areas can reduce the path of light within the lens, thereby reducing the number of light reflections. Furthermore, the air gap between the fourth and fifth lenses affects the lens shape of the fourth and fifth lenses, determining the height of light rays passing through the fourth and fifth lenses. This, combined with the edge thickness of the lenses, can reduce the arc-shaped stray light problem caused by light reflections from the non-transparent areas of the fourth and fifth lenses while maintaining the imaging height of the optical system. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 is a schematic diagram of structural parameters of an optical imaging lens according to one embodiment of the present application;

[0052] Figure 2 is a schematic structural diagram of an optical imaging lens according to the first embodiment of the present application;

[0053] Figure 3 is a schematic structural diagram of an optical imaging lens according to the second embodiment of the present application;

[0054] Figure 4 is a schematic structural diagram of an optical imaging lens according to the third embodiment of the present application;

[0055] Figure 5A Schematic diagrams of on-axis chromatic aberration curves of the optical imaging lenses according to the first, second, and third embodiments of the present application are shown;

[0056] Figure 5B Schematic diagrams of astigmatism curves of the optical imaging lenses according to the first, second, and third embodiments of the present application are shown;

[0057] Figure 5CSchematic diagrams of magnification chromatic aberration curves of the optical imaging lenses according to the first, second, and third embodiments of the present application are shown;

[0058] Figure 6 is a schematic structural diagram of an optical imaging lens according to a fourth embodiment of the present application;

[0059] Figure 7 is a schematic structural diagram of an optical imaging lens according to a fifth embodiment of the present application;

[0060] Figure 8 is a schematic structural diagram of an optical imaging lens according to Example 6 of the present application;

[0061] Figure 9A Schematic diagrams of on-axis chromatic aberration curves of the optical imaging lenses according to the fourth, fifth, and sixth embodiments of the present application are shown;

[0062] Figure 9B Schematic diagrams of astigmatism curves of the optical imaging lenses according to the fourth, fifth, and sixth embodiments of the present application are shown;

[0063] Figure 9C Schematic diagrams of magnification chromatic aberration curves of the optical imaging lenses according to the fourth, fifth, and sixth embodiments of the present application are shown;

[0064] Figure 10 is a schematic structural diagram of an optical imaging lens according to a seventh embodiment of the present application;

[0065] Figure 11 is a schematic structural diagram of an optical imaging lens according to Example 8 of the present application;

[0066] Figure 12 is a schematic structural diagram of an optical imaging lens according to a ninth embodiment of the present application;

[0067] Figure 13A Schematic diagrams of on-axis chromatic aberration curves of the optical imaging lenses according to the seventh, eighth, and ninth embodiments of the present application are shown;

[0068] Figure 13B Schematic diagrams of astigmatism curves of the optical imaging lenses according to the seventh, eighth, and ninth embodiments of the present application are shown;

[0069] Figure 13C Schematic diagrams of magnification chromatic aberration curves of the optical imaging lenses according to the seventh, eighth, and ninth embodiments of the present application are shown;

[0070] Figure 14is a schematic structural diagram of an optical imaging lens according to the tenth embodiment of the present application;

[0071] Figure 15 is a schematic structural diagram of an optical imaging lens according to Example 11 of the present application;

[0072] Figure 16 is a schematic structural diagram of an optical imaging lens according to the twelfth embodiment of the present application;

[0073] Figure 17A Schematic diagrams of on-axis chromatic aberration curves of the optical imaging lenses according to the tenth embodiment, the eleventh embodiment, and the twelfth embodiment of the present application are shown;

[0074] Figure 17B Schematic diagrams of astigmatism curves of the optical imaging lenses according to the tenth, eleventh, and twelfth embodiments of the present application are shown;

[0075] Figure 17C Schematic diagrams of magnification chromatic aberration curves of the optical imaging lenses according to the tenth embodiment, the eleventh embodiment, and the twelfth embodiment of the present application are shown;

[0076] Figure 18 The figure shows a schematic diagram of the light spot of the optical lens when d0m / (L / f)=20.16 and (EP34+EP45) / T45=0.87.

[0077] Figure 19 The figure shows the light spot of the optical lens when d0m / (L / f)=20.16 and (EP34+EP45) / T45=1.25.

[0078] Figure 20 A schematic diagram of the light spot of the optical lens is shown when d0m / (L / f)=20.16 and (EP34+EP45) / T45=2.10. DETAILED DESCRIPTION

[0079] For a better understanding of 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. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0080] 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.

[0081] 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.

[0082] In this document, the paraxial region refers to the area near the optical axis. If a lens surface is convex and the location of the convex surface is undefined, it indicates that the lens surface is convex at least in the paraxial region. If a lens surface is concave and the location of the concave surface is undefined, it indicates that the lens surface is concave at least in the paraxial region. The surface shape in the paraxial region can be determined according to common methods in the art, for example, by determining whether it is concave or convex based on the positive or negative R value (R refers to the radius of curvature of the paraxial region). In this document, the surface of each lens closest to the subject is called the object-side surface, and the surface of each lens closest to the imaging plane is called the image-side surface. For the object-side surface, a positive R value indicates a convex surface, and a negative R value indicates a concave surface. For the image-side surface, a positive R value indicates a concave surface, and a negative R value indicates a convex surface.

[0083] It should also be understood that the terms "comprises," "including," "having," "includes," and / or "comprising," 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. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application." And, the term "exemplary" is intended to refer to an example or illustration.

[0084] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill 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 art and will not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0085] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The following examples only express several implementation methods of the present 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 the present application, and these all fall within the scope of protection of the present application. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0086] According to one aspect of this application, Figure 1 As shown, the present application provides an optical imaging lens, including a lens barrel and a lens group and a spacer assembly housed in the lens barrel; 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 from the object side to the image side; the spacer assembly includes at least two spacer elements arranged between the fourth lens and the fifth lens; the spacer assembly also includes a third spacer element placed on the image side of the third lens and in contact with the image side surface of the third lens, a fourth spacer element placed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, and a fifth spacer element placed on the image side of the fifth lens and in contact with the image side surface of the fifth lens; the air gap between the fourth lens and the fifth lens on the optical axis is greater than the sum of the air gap between the first lens and the second lens on the optical axis, the air gap between the second lens and the third lens on the optical axis, and the air gap between the fifth lens and the sixth lens on the optical axis.

[0087] In particular, the optical imaging lens satisfies the following conditions: 19.15 mm < d0 m / (L / f) < 20.20 mm; and 0.90 < (EP34 + EP45) / T45 < 2.00; wherein d0 m is the inner diameter of the image side surface of the lens barrel, L is the maximum height of the lens barrel, f is the effective focal length of the optical imaging lens, EP34 is the spacing distance between the third spacer element and the fourth spacer element along the optical axis, EP45 is the spacing distance between the fourth spacer element and the fifth spacer element along the optical axis, and T45 is the air gap between the fourth lens and the fifth lens on the optical axis.

[0088] It is worth noting that the optical imaging lens of the present application is a six-element lens with long-focus and large image surface technical characteristics. The air gap between the fourth lens and the fifth lens on the optical axis is greater than the sum of the air gap between the first lens and the second lens on the optical axis, the air gap between the second lens and the third lens on the optical axis, and the air gap between the fifth lens and the sixth lens on the optical axis, and the barrel parameters and the effective focal length of the lens satisfy the relationship 19.15mm<d0m / (L / f)<20.20mm. However, due to the large gap between the fourth and fifth lenses, light is easily reflected from the non-transparent areas within the fourth and fifth lenses, generating arc-shaped stray light. By constraining the distances between the third and fourth spacer elements, the distances between the fourth and fifth spacer elements, and the air gap on the optical axis between the fourth and fifth lenses using the equation 0.90 < (EP34 + EP45) / T45 < 2.00, the thickness of the non-transparent area of ​​the fourth and fifth lenses, as well as the total thickness of the spacer elements between the fourth and fifth lenses, can be controlled. Thinner non-transparent areas can reduce the path of light within the lens, thereby reducing the number of light reflections. Furthermore, the air gap between the fourth and fifth lenses affects the lens shape of the fourth and fifth lenses, determining the height of light rays passing through the fourth and fifth lenses. This, combined with the edge thickness of the lenses, can reduce the arc-shaped stray light problem caused by light reflections from the non-transparent areas of the fourth and fifth lenses while maintaining the imaging height of the optical system.

[0089] In addition, the object-side surface of the first lens is convex; the second lens has positive optical power, and the object-side surface of the second lens is convex; the image-side surface of the third lens is concave; the fourth lens has negative optical power, and the object-side surface and image-side surface of the fourth lens are convex and concave, respectively.

[0090] For example, Figure 18 The figure shows a schematic diagram of the light spot of the optical lens when d0m / (L / f)=20.16 and (EP34+EP45) / T45=0.87. Figure 19 The figure shows the light spot of the optical lens when d0m / (L / f)=20.16 and (EP34+EP45) / T45=1.25. Figure 20 The figure shows the spot diagram of the optical lens when d0m / (L / f)=20.16 and (EP34+EP45) / T45=2.10. Figure 18As shown in the figure, when the ratio of (EP34+EP45) to T45 is equal to 0.87, the ratio of (EP34+EP45) to T45 is less than or equal to 0.90, the maximum energy intensity of the stray light is about 0.000002346, the total energy intensity is about 0.00000045, and the red arc stray light is strong, which has a great impact on the imaging of the light imaging lens. Figure 19 As shown in the figure, when the ratio of (EP34+EP45) to T45 is equal to 1.25, the ratio of (EP34+EP45) to T45 is greater than 0.90 and less than 2.00, the maximum energy intensity of the stray light is about 0.000000413, and the total energy intensity is about 0.000000054. The stray light is significantly reduced, and the imaging effect of the optical imaging lens is greatly improved. Figure 20 As shown, when the ratio of (EP34+EP45) to T45 is equal to 2.1, the ratio of (EP34+EP45) to T45 is greater than or equal to 2.00, the maximum energy intensity of the stray light is approximately 0.000002585, the total energy intensity is approximately 0.00000042, and the red arc stray light is relatively strong, which has a significant impact on the imaging of the light imaging lens. In summary, when the optical imaging lens controls the ratio of d0m to (L / f) to be greater than 19.15mm and less than 20.20mm, and the ratio of (EP34+EP45) to T45 is greater than 0.90 and less than 2.00, the arc stray light generated between the fourth and fifth lens elements has little impact on the imaging quality.

[0091] Preferably, the optical imaging lens satisfies: 19.179 mm ≤ d0 m / (L / f) ≤ 20.162 mm; and 0.919 ≤ (EP34+EP45) / T45 ≤ 1.974.

[0092] According to some embodiments of the present application, the spacer assembly further includes a fourth auxiliary spacer element disposed on the image side of the fourth spacer element and in contact with the image-side surface of the fourth spacer element, and the optical imaging lens satisfies the following condition: 0.20 < (CP4 + CP4b) / (EP34 + EP45) < 0.70; wherein CP4 is the maximum thickness of the fourth spacer element, CP4b is the maximum thickness of the fourth auxiliary spacer element, EP34 is the spacing distance between the third spacer element and the fourth spacer element along the optical axis, and EP45 is the spacing distance between the fourth spacer element and the fifth spacer element along the optical axis.

[0093] In this way, by controlling the ratio range of the sum of the thicknesses of the fourth spacer and the fourth auxiliary spacer to the sum of the spacing distances between the third and fourth spacer elements, and the spacing distances between the fourth spacer and the fifth spacer element, through the above-mentioned relationship, it is possible to ensure that the structural thickness of the light-transmitting and light-non-transmitting portions of the third, fourth, and fifth lenses is uniform, ensuring that the lens can effectively form images. At the same time, the spacing distances between the spacers between the third, fourth, and fifth lenses together constitute the assembled structure of the third, fourth, and fifth lenses, which can ensure the assembly stability of the three lenses and improve the overall yield and reliability.

[0094] Preferably, the optical imaging lens satisfies: 0.217≤(CP4+CP4b) / (EP34+EP45)≤0.658.

[0095] According to some embodiments of the present application, the optical imaging lens satisfies the following: 1.15<EP45 / (CP4+CP4b)<3.10; wherein EP45 is the spacing distance between the fourth spacer element and the fifth spacer element along the optical axis, CP4 is the maximum thickness of the fourth spacer element, and CP4b is the maximum thickness of the fourth auxiliary spacer element.

[0096] Thus, by controlling the ratio of the distance between the fourth and fifth spacers to the sum of the thicknesses of the fourth and auxiliary spacers using the aforementioned relationship, the thickness of the light-transmitting and light-non-transmitting portions of the fourth and fifth lenses can be uniform, ensuring efficient lens formation. Furthermore, since the thickness of the fourth spacer and the distance between the fourth and fifth spacers along the optical axis jointly influence the assembled structure of the fourth and fifth lenses, the aforementioned relationship ensures a stable assembly of the fourth and fifth lenses, thereby improving the performance yield of the optical imaging lens.

[0097] Preferably, the optical imaging lens satisfies: 1.182≤EP45 / (CP4+CP4b)≤3.060.

[0098] According to some embodiments of the present application, the optical imaging lens satisfies: 1.20<D5s / d4m<2.45; wherein D5s is the object-side outer diameter of the fifth spacer element, and d4m is the image-side inner diameter of the fourth spacer element.

[0099] Thus, by controlling the ratio of the object-side outer diameter of the fifth spacer element to the image-side inner diameter of the fourth spacer element through the above-mentioned relationship, stray light emitted from the fourth lens can be avoided. At the same time, controlling the outer diameter of the fifth spacer element can ensure the supporting stability between the fourth lens and the fifth lens, and ensure that the stray light optical path of the non-transparent portion of the fifth lens can be blocked.

[0100] Preferably, the optical imaging lens satisfies: 1.225≤D5s / d4m≤2.430.

[0101] According to some embodiments of the present application, the optical imaging lens meets the following requirements: -4.40mm -1 <f4 / CT4 / d4s<-1.75mm -1 ; wherein f4 is the effective focal length of the fourth lens, CT4 is the center thickness of the fourth lens, and d4s is the inner diameter of the object side of the fourth spacer element.

[0102] In this way, by controlling the ratio range of the effective focal length and center thickness of the fourth lens element and the object-side inner diameter of the fourth spacer element through the above-mentioned relationship, it is possible to ensure that the height and illumination of the light passing through the fourth lens meet the requirements of the optical imaging lens. Controlling the center thickness of the fourth lens element can ensure the strength and assembly stability of the fourth lens. While controlling the object-side inner diameter of the fourth spacer element can reduce the risk of light leakage and block stray light generated by the non-transparent portion of the fourth lens, thereby improving the imaging quality of the optical imaging lens.

[0103] Preferably, the optical imaging lens satisfies: -4.387mm -1 ≤f4 / CT4 / d4s≤-1.788mm -1 .

[0104] According to some embodiments of the present application, the optical imaging lens satisfies the following conditions: 0.20<T45 / L<0.40; and 0.65<d5s / d4m<1.65; wherein T45 is the air gap between the fourth lens and the fifth lens on the optical axis, L is the maximum height of the lens barrel, d5s is the inner diameter of the object side surface of the fifth spacer element, and d4m is the inner diameter of the image side surface of the fourth spacer element.

[0105] In this way, by controlling the ratio of the air gap on the optical axis between the fourth lens and the fifth lens to the total length of the lens barrel through the above-mentioned relationship, the air gap between the fourth lens and the fifth lens can be constrained within a reasonable range, thereby reserving sufficient space for other lenses and the gaps between the lenses. However, this also causes light to pass through a longer air gap after passing through the fourth lens, which can easily generate stray light. By controlling the ratio of the inner diameters of the fifth spacer element to the fourth spacer element through the above-mentioned relationship, the fourth and fifth spacer elements can block excess light generated by the rear edges of the fourth and fifth lenses, thereby reducing the risk of stray light.

[0106] Preferably, the optical imaging lens satisfies: 0.222≤T45 / L≤0.357; and 0.697≤d5s / d4m≤1.630.

[0107] According to some embodiments of the present application, the optical imaging lens satisfies: 5.25<f1234 / (d0s-d4s)<7.65; wherein f1234 is the combined focal length of the first lens, the second lens, the third lens, and the fourth lens, d0s is the inner diameter of the object side of the lens barrel, and d4s is the inner diameter of the object side of the fourth spacer element.

[0108] In this way, by controlling the ratio range of the combined focal length of the first lens, the second lens, the third lens, and the fourth lens to the difference between the inner diameter of the object side surface of the lens barrel and the inner diameter of the object side surface of the fourth spacer element through the above-mentioned relationship, the overall effective focal length of the optical system can be guaranteed, and the light can be more converged. By controlling the inner diameter of the object side surface of the lens barrel, the amount of light entering the lens can be effectively controlled, thereby ensuring the overall illumination of the lens. At the same time, by controlling the inner diameter of the fourth spacer element, the light beam passing through the edge of the effective diameter of the fourth lens can be intercepted, thereby reducing the risk of light leakage and stray light, and improving the imaging quality of the lens.

[0109] Preferably, the optical imaging lens satisfies: 5.265≤f1234 / (d0s-d4s)≤7.613.

[0110] According to some embodiments of the present application, the spacer element further includes a first spacer element positioned on the image side of the first lens and in contact with the image-side surface of the first lens, and a first auxiliary spacer element positioned on the image side of the first spacer element and in contact with the image-side surface of the first spacer element. The optical imaging lens satisfies the following conditions: 4.75<d1bs / CP1b<6.50; wherein d1bs is the inner diameter of the object-side surface of the first auxiliary spacer element, and CP1b is the maximum thickness of the first auxiliary spacer element.

[0111] In this way, by controlling the ratio range of the inner diameter of the object-side surface of the first auxiliary spacer element to the maximum thickness of the first auxiliary spacer element through the above-mentioned relationship, the assembly strength and stability between the first lens and the second lens can be effectively guaranteed. At the same time, by properly designing the thickness of the first auxiliary spacer element, the effective focal length between the first lens and the second lens can be more reasonably controlled, thereby enhancing the light converging effect and improving the imaging quality of the optical imaging lens.

[0112] Preferably, the optical imaging lens satisfies: 4.758≤d1bs / CP1b≤6.456.

[0113] According to some embodiments of the present application, the optical imaging lens satisfies the following condition: 2.20<D1bs / d1bs+D1bm / d1bm<2.55; wherein D1bs is the object-side outer diameter of the first auxiliary spacer element, d1bs is the object-side inner diameter of the first auxiliary spacer element, D1bm is the image-side outer diameter of the first auxiliary spacer element, and d1bm is the image-side inner diameter of the first auxiliary spacer element.

[0114] In this way, by controlling the sum of the ratio of the object-side inner diameter to the object-side outer diameter of the first auxiliary spacer element and the ratio of the image-side inner diameter to the image-side outer diameter within a reasonable range through the above-mentioned relationship, the assembly stability between the first lens and the second lens can be improved. At the same time, by controlling the object-side inner diameter and the image-side inner diameter of the first auxiliary spacer element, the long cantilever structure of the front and rear spacer elements can be effectively avoided, avoiding the problem of additional stray light caused by the deflection of the spacer element, and making the spacer element have better shielding of the light path and imaging effects.

[0115] Preferably, the optical imaging lens satisfies: 2.244≤D1bs / d1bs+D1bm / d1bm≤2.520.

[0116] According to some embodiments of the present application, the optical imaging lens satisfies the following: 40.20<R1 / (EP01-CT1)<57.85; wherein R1 is the curvature radius of the object side surface of the first lens, EP01 is the spacing distance from the object side surface of the lens barrel to the object side surface of the first spacer element along the optical axis, and CT1 is the center thickness of the first lens.

[0117] In this way, by controlling the ratio of the curvature radius of the object side surface of the first lens and the distance between the object side surface of the lens barrel and the object side surface of the first spacer element along the optical axis to the center thickness of the first lens within a reasonable range through the above-mentioned relationship, the divergence of the light emitted from the first lens can be effectively reduced, thereby effectively focusing stray light and reducing the risk of stray light generated by the first lens. At the same time, by reasonably designing the curvature radius and center thickness of the object side surface of the first lens, the molding strength of the first lens can be guaranteed, the sensitivity of the first lens can be reduced, and a better imaging effect can be achieved.

[0118] Preferably, the optical imaging lens satisfies: 40.247≤R1 / (EP01-CT1)≤57.799.

[0119] According to some embodiments of the present application, the optical imaging lens satisfies the following: 2.00<T45 / (EP45 / n)<6.05; wherein T45 is the air gap between the fourth lens and the fifth lens on the optical axis, EP45 is the spacing distance between the fourth spacer element and the fifth spacer element along the optical axis, and n is the number of spacer elements between the fourth lens and the fifth lens, where n is 2, 3, 4, or 5.

[0120] In this way, by controlling the ratio of the air gap on the optical axis between the fourth lens and the fifth lens to the spacing distance between the fourth spacer element and the fifth spacer element, and the number n of spacer elements between the fourth lens and the fifth lens through the above-mentioned relationship, it is possible to set a reasonable number of spacer elements between the fourth lens and the fifth lens of the lens while ensuring the edge thickness of the fifth lens, thereby ensuring assembly stability and reliability.

[0121] Preferably, the optical imaging lens satisfies: 2.037≤T45 / (EP45 / n)≤6.014.

[0122] According to some embodiments of the present application, the optical imaging lens satisfies the following conditions: 2.00 mm ≤ d0 m / (f × tan (Semi-FOV)) < 2.30 mm; wherein d0 m is the inner diameter of the image side of the lens barrel, f is the effective focal length of the optical imaging lens, and Semi-FOV is half of the maximum field of view of the optical imaging lens.

[0123] In this way, by controlling the ratio of the image-side inner diameter of the lens barrel to the product of the effective focal length and the tangent of the half field angle within a reasonable range through the above-mentioned relationship, stray light at the rear end of the lens barrel can be avoided, the problem of field curvature anomalies can be improved, and the field curvature consistency of the optical imaging lens can be improved, thereby improving the imaging quality of the optical imaging lens.

[0124] Preferably, the optical imaging lens satisfies: 2.00 mm ≤ d0 m / (f × tan (Semi-FOV)) ≤ 2.264 mm.

[0125] According to some embodiments of the present application, the optical imaging lens satisfies the following: 1.90<∑CP4 / (SG42+SG51)<4.8; wherein ∑CP4 is the sum of the maximum thicknesses of all spacer elements between the fourth lens and the fifth lens, SG42 is the distance along the optical axis from the intersection of the image side surface of the fourth lens and the optical axis to the object side surface of the spacer element in contact with the image side surface of the fourth lens, and SG51 is the distance along the optical axis from the intersection of the object side surface of the fifth lens and the optical axis to the image side surface of the spacer element in contact with the object side surface of the fifth lens.

[0126] In this way, by controlling the ratio of the sum of the maximum thickness of the spacer element between the fourth lens and the fifth lens to the sum of the distance along the optical axis between the intersection of the fourth lens and the object side surface of the spacer element in contact with the image side surface of the fourth lens and the intersection of the fifth lens and the optical axis and the object side surface of the spacer element in contact with the image side surface of the fifth lens, within a reasonable range through the above-mentioned relationship, it is helpful to control the curvature from the light-transmitting area to the non-light-transmitting area of ​​the fourth lens and the fifth lens, thereby improving the surface smoothness of the fourth lens and the fifth lens. At the same time, by reasonably setting the thickness of the spacer element between the fourth lens and the fifth lens, it is helpful to control the overall thickness ratio of the fourth lens and the fifth lens, thereby reducing molding risks and lens surface sensitivity.

[0127] According to another aspect of the present application, another embodiment of the present application provides an optical imaging lens, including a lens barrel and a lens group and a spacer assembly housed in the lens barrel; 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 from the object side to the image side along the optical axis; wherein the first lens has positive focal power and the object side surface of the first lens is convex, the second lens has positive focal power and the object side surface of the second lens is convex, and the fourth lens has negative focal power; the spacer assembly includes at least one lens arranged between the fourth lens and the fifth lens two spacer elements; the spacer assembly further includes a third spacer element disposed on the image side of the third lens and in contact with the image side surface of the third lens, a fourth spacer element disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, and a fifth spacer element disposed on the image side of the fifth lens and in contact with the image side surface of the fifth lens; the air gap between the fourth lens and the fifth lens on the optical axis is greater than the sum of the air gap between the first lens and the second lens on the optical axis, the air gap between the second lens and the third lens on the optical axis, and the air gap between the fifth lens and the sixth lens on the optical axis.

[0128] In particular, the optical imaging lens satisfies the following conditions: 2.55<T45 / (CT4+CT5)<3.60; and 1.10<EP45 / (CP4+EP34)<3.75; wherein T45 is the air gap between the fourth lens and the fifth lens on the optical axis, CT4 is the center thickness of the fourth lens, CT5 is the center thickness of the fifth lens, EP45 is the spacing distance between the fourth spacer element and the fifth spacer element along the optical axis, CP4 is the maximum thickness of the fourth spacer element, and EP34 is the spacing distance between the third spacer element and the fourth spacer element along the optical axis.

[0129] In this way, the positive and negative distribution of the optical power of the lenses in the lens assembly, the convex and concave shape of the lens surfaces, and the air gap between the fourth and fifth lenses on the optical axis are controlled. Since the air gap between the fourth and fifth lenses is relatively large, by controlling the center thickness of the fourth and fifth lenses to satisfy the relationship 1.40<T45 / (CT4+CT5)<3.60, the overall distribution of the lens spacing can be optimized, and the angle between the light passing through the fourth and fifth lenses and the optical axis can be controlled to converge the light, thereby increasing the clarity of the final image. By controlling the relationship between the spacing between the third, fourth, and fifth spacer elements and the maximum thickness of the fourth spacer element, the thickness of the spacer element between the fourth and fifth lenses, as well as the thickness of the non-transparent regions of the fourth and fifth lenses, can be reasonably set, improving assembly stability.

[0130] Preferably, the optical imaging lens satisfies: 2.599≤T45 / (CT4+CT5)≤3.583; and 1.133≤EP45 / (CP4+EP34)≤3.738.

[0131] It should be noted that those skilled in the art will appreciate that, without departing from the claimed technical solution, the number of spacer elements in the optical lens may be varied to achieve the various results and advantages described herein, and this application does not impose specific limitations thereon. For example, the optical imaging lens may include a different number of spacer elements than that described in the above embodiments, as desired.

[0132] The following describes in more detail some specific, non-limiting examples of the above-mentioned embodiments of the present application with reference to the accompanying drawings. For ease of description, in the following embodiments, OBJ represents the object plane of the optical lens, STO represents the surface of the aperture, S1 represents the object-side surface of the first lens element E1, S2 represents the image-side surface of the first lens element E1, S3 represents the object-side surface of the second lens element E2, S4 represents the image-side surface of the second lens element E2, S5 represents the object-side surface of the third lens element E3, S6 represents the image-side surface of the third lens element E3, S7 represents the object-side surface of the fourth lens element E4, S8 represents the image-side surface of the fourth lens element E4, S9 represents the object-side surface of the fifth lens element E5, S10 represents the image-side surface of the fifth lens element E5, S11 represents the object-side surface of the sixth lens element E6, and S12 represents the image-side surface of the sixth lens element E6. In addition, Aj represents the j-th order aspheric coefficient, where j = 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, or 24.

[0133] Example 1

[0134] like Figure 2As shown in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the lens group comprises, arranged in sequence 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, a fifth lens E5, and a sixth lens E6. The spacer assembly comprises a third spacer element P3 disposed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, a fourth spacer element P4 disposed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4, and a fifth spacer element P5 disposed on the image side of the fifth lens E5 and in contact with the image side surface of the fifth lens E5.

[0135] In this embodiment, the spacer assembly further includes a first spacer element P1 disposed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, a first auxiliary spacer element P1b disposed on the image side of the first spacer element P1 and in contact with the image side surface of the first spacer element P1, a second spacer element P2 disposed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a fourth auxiliary spacer element P4b disposed on the image side of the fourth spacer element P4 and in contact with the image side surface of the fourth spacer element P4, a fourth-second auxiliary spacer element P4c disposed on the image side of the fourth auxiliary spacer element P4b and in contact with the image side surface of the fourth auxiliary spacer element P4b, a fourth-second auxiliary spacer element P4d disposed on the image side of the fourth-first auxiliary spacer element P4c and in contact with the image side surface of the fourth-first auxiliary spacer element P4c, and a fourth-third auxiliary spacer element P4e disposed on the image side of the fourth-second auxiliary spacer element P4d and in contact with the image side surface of the fourth-second auxiliary spacer element P4d.

[0136] In this embodiment, the first lens E1 has positive focal power, and the object-side surface S1 and the image-side surface S2 of the first lens E1 are convex and concave, respectively; the second lens E2 has positive focal power, and the object-side surface S3 and the image-side surface S4 of the second lens E2 are convex and concave, respectively; the third lens E3 has positive focal power, and the object-side surface S5 and the image-side surface S6 of the third lens E3 are convex and concave, respectively; the fourth lens E4 has negative focal power, and the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are convex and concave, respectively; the fifth lens E5 has positive focal power, and the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are convex; the sixth lens E6 has negative focal power, and the object-side surface S11 and the image-side surface S12 of the sixth lens E6 are concave.

[0137] In addition, Table 1 shows the basic optical parameters of the optical imaging lens of Example 1, wherein the units of the curvature radius, thickness / distance, and effective radius are all millimeters (mm).

[0138] Table 1: Basic optical parameters of the optical imaging lens of Example 1

[0139]

[0140] In this embodiment, the object-side surface and the image-side surface of any lens from the first lens E1 to the sixth lens E6 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:

[0141] ;

[0142] Where x is the distance 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., paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspheric surface. Table 2 below lists the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, and A20 that can be used for each aspheric mirror surface S1 to S12 in Example 1.

[0143] Table 2: Aspheric coefficients of the optical imaging lens of Example 1

[0144]

[0145] Example 2

[0146] like Figure 3 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6, which are arranged in sequence from the object side to the image side along the optical axis.

[0147] Different from the first embodiment, in this embodiment, the spacer assembly only includes the first spacer element P1, the first auxiliary spacer element P1b, the second spacer element P2, the third spacer element P3, the fourth spacer element P4, the fourth auxiliary spacer element P4b, the fourth auxiliary spacer element P4c and the fifth spacer element P5.

[0148] It is noteworthy that the optical imaging lens of Example 2 has the same optical parameters as those of Example 1. Specifically, the basic optical parameter table of the optical imaging lens of Example 2 is the same as Table 1, and the aspheric coefficient table is the same as Table 2. The structural data of the optical imaging lens of Example 2 is shown in Table 10 below.

[0149] Specifically, the values ​​of the various relevant structural parameters in the second embodiment and the above-mentioned first embodiment are respectively shown in Table 10 below, and the multiple structural parameters specifically include: the inner diameter d1bs of the object side surface of the first auxiliary spacer element P1b; the inner diameter d1bm of the image side surface of the first auxiliary spacer element P1b; the outer diameter D1bs of the object side surface of the first auxiliary spacer element P1b; the outer diameter D1bm of the image side surface of the first auxiliary spacer element P1b; the inner diameter d4s of the object side surface of the fourth spacer element P4; the inner diameter d4m of the image side surface of the fourth spacer element P4; the inner diameter d5s of the object side surface of the fifth spacer element P5; the outer diameter D5s of the object side surface of the fifth spacer element P5; the inner diameter d0s of the object side surface of the lens barrel P0; and the inner diameter d0s of the image side surface of the lens barrel P0. m; the spacing distance EP01 from the object side surface of the lens barrel P0 to the object side surface of the first spacer element P1 along the optical axis; the maximum thickness CP1b of the first auxiliary spacer element P1b; the spacing distance EP12 between the first spacer element P1 and the second spacer element P2 along the optical axis; the spacing distance EP34 between the third spacer element P3 and the fourth spacer element P4 along the optical axis; the maximum thickness CP4 of the fourth spacer element P4; the maximum thickness CP4b of the fourth auxiliary spacer element P4b; the spacing distance EP45 between the fourth spacer element P4 and the fifth spacer element P5 along the optical axis; the maximum height L of the lens barrel P0; the number n of spacers between the fourth lens E4 and the fifth lens E5. It can be understood that the units of the values ​​of the parameters shown in Table 10 below are all millimeters (mm), and the schematic diagram of the parameters in the structural diagram of the optical lens is as follows: Figure 1 shown.

[0150] Example 3

[0151] like Figure 4 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly accommodated in the lens barrel P0; the lens group includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6, which are arranged in sequence from the object side to the image side along the optical axis.

[0152] Different from the first embodiment, in this embodiment, the spacer assembly only includes the first spacer element P1, the first auxiliary spacer element P1b, the second spacer element P2, the third spacer element P3, the fourth spacer element P4, the fourth auxiliary spacer element P4b and the fifth spacer element P5.

[0153] It is noteworthy that the optical imaging lens of Example 3 has the same optical parameters as those of Example 1. Specifically, the basic optical parameter table of the optical imaging lens of Example 3 is the same as Table 1, and the aspheric coefficient table is the same as Table 2. The values ​​of the various relevant structural parameters in Example 3 are shown in Table 10 below. The specific descriptions of the various structural parameters are the same as those in Example 2 above and are not repeated here.

[0154] The axial chromatic aberration curves of the optical imaging lenses in Example 1, Example 2 and Example 3 are as follows: Figure 5A As shown, it represents the degree of deviation of the focal point of light of different wavelengths after passing through the optical imaging lens; the astigmatism curves of the optical imaging lens in Example 1, Example 2 and Example 3 are shown in FIG. Figure 5B As shown, it represents the degree of meridional image curvature and sagittal image curvature; the magnification chromatic aberration curves of the optical imaging lenses in Example 1, Example 2 and Example 3 are shown as follows Figure 5C As shown in , it shows the difference in magnification of light of different wavelengths during imaging. Figure 5A 、 Figure 5B and Figure 5C It can be seen that the optical imaging lenses in the first embodiment, the second embodiment and the third embodiment can all achieve good imaging quality.

[0155] Example 4

[0156] like Figure 6 As shown in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the lens group comprises, arranged in sequence 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, a fifth lens E5, and a sixth lens E6. The spacer assembly comprises a third spacer element P3 disposed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, a fourth spacer element P4 disposed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4, and a fifth spacer element P5 disposed on the image side of the fifth lens E5 and in contact with the image side surface of the fifth lens E5.

[0157] In this embodiment, the spacer assembly further includes a first spacer element P1 disposed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, a first auxiliary spacer element P1b disposed on the image side of the first spacer element P1 and in contact with the image side surface of the first spacer element P1, a second spacer element P2 disposed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a fourth auxiliary spacer element P4b disposed on the image side of the fourth spacer element P4 and in contact with the image side surface of the fourth spacer element P4, and a fourth-second auxiliary spacer element P4c disposed on the image side of the fourth auxiliary spacer element P4b and in contact with the image side surface of the fourth auxiliary spacer element P4b.

[0158] In this embodiment, the first lens E1 has positive focal power, and the object-side surface S1 and the image-side surface S2 of the first lens E1 are both convex surfaces; the second lens E2 has positive focal power, and the object-side surface S3 and the image-side surface S4 of the second lens E2 are convex and concave surfaces, respectively; the third lens E3 has positive focal power, and the object-side surface S5 and the image-side surface S6 of the third lens E3 are convex and concave surfaces, respectively; the fourth lens E4 has negative focal power, and the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are convex and concave surfaces, respectively; the fifth lens E5 has negative focal power, and the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are both concave surfaces; the sixth lens E6 has positive focal power, and the object-side surface S11 and the image-side surface S12 of the sixth lens E6 are convex and concave surfaces, respectively.

[0159] In addition, Table 3 shows the basic optical parameters of the optical imaging lens of Example 4, wherein the units of the curvature radius, thickness / distance, and effective radius are all millimeters (mm).

[0160] Table 3: Basic optical parameters of the optical imaging lens of Example 4

[0161]

[0162] In this embodiment, both the object-side and image-side surfaces of each of the first through sixth lenses E1 through E6 are aspherical surfaces. The surface shape of each aspherical lens can be defined by the aspheric surface formulas described in Example 1. Table 4 below lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 for each of the aspheric mirror surfaces S1 through S12 in Example 4.

[0163] Table 4: Aspheric coefficients of the optical imaging lens of Example 4

[0164]

[0165] Example 5

[0166] like Figure 7 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6, which are arranged in sequence from the object side to the image side along the optical axis.

[0167] Different from the fourth embodiment, in this embodiment, the spacing assembly not only includes the first spacing element P1, the first auxiliary spacing element P1b, the second spacing element P2, the third spacing element P3, the fourth spacing element P4, the fourth auxiliary spacing element P4b, the fourth-first auxiliary spacing element P4c and the fifth spacing element P5, but also includes a fourth-second auxiliary spacing element P4d placed on the image side of the fourth-first auxiliary spacing element P4c and in contact with the image side surface of the fourth-first auxiliary spacing element P4c, and a fourth-third auxiliary spacing element P4e placed on the image side of the fourth-second auxiliary spacing element P4d and in contact with the image side surface of the fourth-second auxiliary spacing element P4d.

[0168] It is noteworthy that the optical imaging lens of this fifth embodiment has the same optical parameters as those of the fourth embodiment. Specifically, the basic optical parameter table of the optical imaging lens of this fifth embodiment is the same as Table 3, and the aspheric coefficient table is the same as Table 4. The values ​​of the various relevant structural parameters of this fifth embodiment are shown in Table 10 below. The specific descriptions of the various structural parameters are the same as those of the second embodiment above and are not repeated here.

[0169] Example 6

[0170] like Figure 8 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6, which are arranged in sequence from the object side to the image side along the optical axis.

[0171] Different from the fourth embodiment, in this embodiment, the spacing assembly not only includes the first spacing element P1, the first auxiliary spacing element P1b, the second spacing element P2, the third spacing element P3, the fourth spacing element P4, the fourth auxiliary spacing element P4b, the fourth-second auxiliary spacing element P4c and the fifth spacing element P5, but also includes the fourth-second auxiliary spacing element P4d placed on the image side of the fourth-first auxiliary spacing element P4c and in contact with the image side surface of the fourth-first auxiliary spacing element P4c.

[0172] It is noteworthy that the optical imaging lens of Example 6 has the same optical parameters as those of Example 4. Specifically, the basic optical parameter table of the optical imaging lens of Example 6 is the same as Table 3, and the aspheric coefficient table is the same as Table 4. The values ​​of the various relevant structural parameters of Example 6 are shown in Table 10 below. The specific descriptions of the various structural parameters are the same as those of Example 2 above and are not repeated here.

[0173] The axial chromatic aberration curves of the optical imaging lenses in the fourth, fifth and sixth embodiments are as follows: Figure 9A As shown, it represents the degree of deviation of the focal point of light of different wavelengths after passing through the optical imaging lens; the astigmatism curves of the optical imaging lens in Example 4, Example 5 and Example 6 are shown in FIG. Figure 9B As shown, it represents the degree of meridional image curvature and sagittal image curvature; the magnification chromatic aberration curves of the optical imaging lenses in Examples 4, 5 and 6 are shown in Figure 9C As shown in , it shows the difference in magnification of light of different wavelengths during the imaging process. Figure 9A 、 Figure 9B and Figure 9C It can be seen that the optical imaging lenses in the fourth embodiment, the fifth embodiment and the sixth embodiment can all achieve good imaging quality.

[0174] Example 7

[0175] like Figure 10 As shown in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the lens group comprises, arranged in sequence 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, a fifth lens E5, and a sixth lens E6. The spacer assembly comprises a third spacer element P3 disposed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, a fourth spacer element P4 disposed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4, and a fifth spacer element P5 disposed on the image side of the fifth lens E5 and in contact with the image side surface of the fifth lens E5.

[0176] In this embodiment, the spacer assembly further includes a first spacer element P1 disposed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, a first auxiliary spacer element P1b disposed on the image side of the first spacer element P1 and in contact with the image side surface of the first spacer element P1, a second spacer element P2 disposed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a fourth auxiliary spacer element P4b disposed on the image side of the fourth spacer element P4 and in contact with the image side surface of the fourth spacer element P4, and a fourth-second auxiliary spacer element P4c disposed on the image side of the fourth auxiliary spacer element P4b and in contact with the image side surface of the fourth auxiliary spacer element P4b.

[0177] In this embodiment, the first lens E1 has negative focal power, and the object-side surface S1 and the image-side surface S2 of the first lens E1 are convex and concave surfaces, respectively; the second lens E2 has positive focal power, and the object-side surface S3 and the image-side surface S4 of the second lens E2 are both convex surfaces; the third lens E3 has negative focal power, and the object-side surface S5 and the image-side surface S6 of the third lens E3 are both concave surfaces; the fourth lens E4 has negative focal power, and the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are convex and concave surfaces, respectively; the fifth lens E5 has positive focal power, and the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are both convex surfaces; the sixth lens E6 has negative focal power, and the object-side surface S11 and the image-side surface S12 of the sixth lens E6 are concave and convex surfaces, respectively.

[0178] In addition, Table 5 shows the basic optical parameters of the optical imaging lens of Example 7, wherein the units of the curvature radius, thickness / distance, and effective radius are all in millimeters (mm).

[0179] Table 5: Basic optical parameters of the optical imaging lens of Example 7

[0180]

[0181] In this embodiment, both the object-side and image-side surfaces of each of the first through sixth lenses E1 through E6 are aspherical surfaces. The surface shape of each aspherical lens can be defined by the aspheric surface formulas described in Example 1. Table 6 below lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of the aspheric surfaces S1 through S12 that can be used in Example 7.

[0182] Table 6: Aspheric coefficients of the optical imaging lens of Example 7

[0183]

[0184] Example 8

[0185] like Figure 11 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6, which are arranged in sequence from the object side to the image side along the optical axis.

[0186] Different from the seventh embodiment, in this embodiment, the spacing assembly not only includes the first spacing element P1, the first auxiliary spacing element P1b, the second spacing element P2, the third spacing element P3, the fourth spacing element P4, the fourth auxiliary spacing element P4b, the fourth-second auxiliary spacing element P4c and the fifth spacing element P5, but also includes the fourth-second auxiliary spacing element P4d placed on the image side of the fourth-first auxiliary spacing element P4c and in contact with the image side surface of the fourth-first auxiliary spacing element P4c.

[0187] It is noteworthy that the optical imaging lens of Example 8 has the same optical parameters as those of Example 7. Specifically, the basic optical parameter table of the optical imaging lens of Example 8 is the same as Table 5, and the aspheric coefficient table is the same as Table 6. The values ​​of the various relevant structural parameters of Example 8 are shown in Table 10 below. The specific descriptions of the various structural parameters are the same as those of Example 2 above and are not repeated here.

[0188] Example 9

[0189] like Figure 12 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6, which are arranged in sequence from the object side to the image side along the optical axis.

[0190] Different from the seventh embodiment, in this embodiment, the spacing assembly not only includes the first spacing element P1, the first auxiliary spacing element P1b, the second spacing element P2, the third spacing element P3, the fourth spacing element P4, the fourth auxiliary spacing element P4b, the fourth-second auxiliary spacing element P4c and the fifth spacing element P5, but also includes the fourth-second auxiliary spacing element P4d placed on the image side of the fourth-first auxiliary spacing element P4c and in contact with the image side surface of the fourth-first auxiliary spacing element P4c.

[0191] It is noteworthy that the optical imaging lens of Example 9 has the same optical parameters as those of Example 7. Specifically, the basic optical parameter table of the optical imaging lens of Example 9 is the same as Table 5, and the aspheric coefficient table is the same as Table 6. The values ​​of the various relevant structural parameters of Example 9 are shown in Table 10 below. The specific descriptions of the various structural parameters are the same as those of Example 2 above and are not repeated here.

[0192] The axial chromatic aberration curves of the optical imaging lenses in Examples 7, 8 and 9 are as follows: Figure 13A As shown, it represents the degree of deviation of the focal point of light of different wavelengths after passing through the optical imaging lens; the astigmatism curves of the optical imaging lenses in Examples 7, 8 and 9 are shown in FIG. Figure 13B As shown, it represents the degree of meridional image curvature and sagittal image curvature; the magnification chromatic aberration curves of the optical imaging lenses in Examples 7, 8 and 9 are shown in Figure 13C As shown in , it shows the difference in magnification of light of different wavelengths during the imaging process. Figure 13A 、 Figure 13B and Figure 13C It can be seen that the optical imaging lenses in the seventh embodiment, the eighth embodiment and the ninth embodiment can all achieve good imaging quality.

[0193] Example 10

[0194] like Figure 14 As shown in this embodiment, the optical imaging lens comprises a lens barrel P0 and a lens group and a spacer assembly housed within the lens barrel P0; the lens group comprises, arranged in sequence 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, a fifth lens E5, and a sixth lens E6. The spacer assembly comprises a third spacer element P3 disposed on the image side of the third lens E3 and in contact with the image side surface of the third lens E3, a fourth spacer element P4 disposed on the image side of the fourth lens E4 and in contact with the image side surface of the fourth lens E4, and a fifth spacer element P5 disposed on the image side of the fifth lens E5 and in contact with the image side surface of the fifth lens E5.

[0195] In this embodiment, the spacer assembly further includes a first spacer element P1 disposed on the image side of the first lens E1 and in contact with the image side surface of the first lens E1, a first auxiliary spacer element P1b disposed on the image side of the first spacer element P1 and in contact with the image side surface of the first spacer element P1, a second spacer element P2 disposed on the image side of the second lens E2 and in contact with the image side surface of the second lens E2, a fourth auxiliary spacer element P4b disposed on the image side of the fourth spacer element P4 and in contact with the image side surface of the fourth spacer element P4, and a fourth-second auxiliary spacer element P4c disposed on the image side of the fourth auxiliary spacer element P4b and in contact with the image side surface of the fourth auxiliary spacer element P4b.

[0196] In this embodiment, the first lens E1 has positive focal power, and the object-side surface S1 and the image-side surface S2 of the first lens E1 are convex and concave, respectively; the second lens E2 has positive focal power, and the object-side surface S3 and the image-side surface S4 of the second lens E2 are convex and concave, respectively; the third lens E3 has positive focal power, and the object-side surface S5 and the image-side surface S6 of the third lens E3 are convex and concave, respectively; the fourth lens E4 has negative focal power, and the object-side surface S7 and the image-side surface S8 of the fourth lens E4 are convex and concave, respectively; the fifth lens E5 has positive focal power, and the object-side surface S9 and the image-side surface S10 of the fifth lens E5 are concave and convex, respectively; the sixth lens E6 has negative focal power, and the object-side surface S11 and the image-side surface S12 of the sixth lens E6 are convex and concave, respectively.

[0197] In addition, Table 7 shows the basic optical parameters of the optical imaging lens of Example 7, wherein the units of the curvature radius, thickness / distance, and effective radius are all millimeters (mm).

[0198] Table 7: Basic optical parameters of the optical imaging lens of Example 10

[0199]

[0200] In this embodiment, both the object-side and image-side surfaces of each of the first through sixth lenses E1 through E6 are aspherical surfaces. The surface shape of each aspherical lens can be defined by the aspheric surface formulas given in Example 1. Table 8 below lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, and A24 of the aspheric surfaces S1 through S12 that can be used in Example 10.

[0201] Table 8: Aspheric coefficients of the optical imaging lens of Example 10

[0202]

[0203] Example 11

[0204] like Figure 15 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6, which are arranged in sequence from the object side to the image side along the optical axis.

[0205] Different from the tenth embodiment, in this embodiment, the spacer assembly not only includes the first spacer element P1, the first auxiliary spacer element P1b, the second spacer element P2, the third spacer element P3, the fourth spacer element P4, the fourth auxiliary spacer element P4b, the fourth-second auxiliary spacer element P4c and the fifth spacer element P5, but also includes the fourth-second auxiliary spacer element P4d placed on the image side of the fourth-first auxiliary spacer element P4c and in contact with the image side surface of the fourth-first auxiliary spacer element P4c.

[0206] It is noteworthy that the optical imaging lens of Example 11 has the same optical parameters as those of Example 7. Specifically, the basic optical parameter table of the optical imaging lens of Example 11 is the same as Table 7, and the aspheric coefficient table is the same as Table 8. The values ​​of the various relevant structural parameters of Example 11 are shown in Table 10 below. The specific descriptions of the various structural parameters are the same as those of Example 2 above and are not repeated here.

[0207] Example 12

[0208] like Figure 16 As shown, in this embodiment, the optical imaging lens includes a lens barrel P0 and a lens group and a spacer assembly housed in the lens barrel P0; the lens group includes: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5 and a sixth lens E6, which are arranged in sequence from the object side to the image side along the optical axis.

[0209] Different from the tenth embodiment, in this embodiment, the spacer assembly not only includes the first spacer element P1, the first auxiliary spacer element P1b, the second spacer element P2, the third spacer element P3, the fourth spacer element P4, the fourth auxiliary spacer element P4b, the fourth-second auxiliary spacer element P4c and the fifth spacer element P5, but also includes the fourth-second auxiliary spacer element P4d placed on the image side of the fourth-first auxiliary spacer element P4c and in contact with the image side surface of the fourth-first auxiliary spacer element P4c.

[0210] It is noteworthy that the optical imaging lens of Example 12 has the same optical parameters as those of Example 7. Specifically, the basic optical parameter table of the optical imaging lens of Example 12 is the same as Table 7, and the aspheric coefficient table is the same as Table 8. The numerical values ​​of the various relevant structural parameters of Example 12 are shown in Table 10 below. The specific descriptions of the various structural parameters are the same as those of Example 2 above and are not repeated here.

[0211] The axial chromatic aberration curves of the optical imaging lenses in Example 10, Example 11 and Example 12 are as follows: Figure 17A As shown, it represents the degree of deviation of the focal point of light of different wavelengths after passing through the optical imaging lens; the astigmatism curves of the optical imaging lens in Example 10, Example 11 and Example 12 are shown in FIG. Figure 17B As shown, it represents the degree of meridional image curvature and sagittal image curvature; the magnification chromatic aberration curves of the optical imaging lenses in Example 10, Example 11 and Example 12 are shown in Figure 17C As shown in , it shows the difference in magnification of light of different wavelengths during the imaging process. Figure 17A 、 Figure 17B and Figure 17C It can be seen that the optical imaging lenses in the tenth embodiment, the eleventh embodiment, and the twelfth embodiment can all achieve good imaging quality.

[0212] In summary, in Examples 1 to 12, half of the maximum field of view (Semi-FOV) of the optical imaging lens, the entrance pupil diameter (EPD) of the optical imaging lens, the effective focal length (f) of the optical imaging lens, the effective focal lengths (f1 to f6) of the first lens element (E1) to the sixth lens element (E6) in the optical imaging lens, and the combined focal length (f1234) of the first lens element (E1) to the fourth lens element (E4) in the optical imaging lens are shown in Table 9 below, respectively.

[0213] Table 9: Optical parameters of optical imaging lenses

[0214]

[0215] In addition, some structural parameters of the optical imaging lenses in Examples 1 to 12 are specifically shown in Table 10.

[0216] Table 10: Some structural parameters of optical imaging lenses

[0217]

[0218] In summary, the optical imaging lenses in Examples 1 to 12 satisfy the relationship shown in Table 11, as shown in Table 11.

[0219] Table 11: Relationships satisfied by optical imaging lenses

[0220]

[0221] It is worth mentioning that according to one aspect of the present application, one embodiment of the present application further provides a camera module, which may include the above-mentioned optical imaging lens and a photosensitive element, wherein the photosensitive element is arranged on the image side of the optical imaging lens for imaging. It is understood that the photosensitive element mentioned in the present application may be implemented as, but not limited to, a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS), and this application will not elaborate on this.

[0222] In addition, according to another aspect of the present application, one embodiment of the present application further provides an electronic device, which may include the above-mentioned camera module and a processor, wherein the camera module is communicatively connected to the processor to acquire image data and input the image data into the processor for processing. It is understood that the electronic device mentioned in this application can be implemented as, but not limited to, a device such as a mobile phone equipped with the camera module, and this application will not elaborate on this.

[0223] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0224] The above embodiments merely illustrate several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An optical imaging lens, characterized in that: The invention comprises a lens barrel and a lens group and a spacer assembly housed in the lens barrel; 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 from the object side to the image side; the spacer assembly comprises at least two spacer elements arranged between the fourth lens and the fifth lens; the spacer assembly further comprises a third spacer element disposed on the image side of the third lens and in contact with the image side surface of the third lens, a fourth spacer element disposed on the image side of the fourth lens and in contact with the image side surface of the fourth lens, and a fifth spacer element disposed on the image side of the fifth lens and in contact with the image side surface of the fifth lens; an air gap between the fourth lens and the fifth lens on the optical axis is greater than the sum of the air gap between the first lens and the second lens on the optical axis, the air gap between the second lens and the third lens on the optical axis, and the air gap between the fifth lens and the sixth lens on the optical axis; the optical imaging lens satisfies: 19.15 mm < d0 m / (L / f) < 20.20 mm; and 0.90<(EP34+EP45) / T45<2.00; Wherein, d0m is the inner diameter of the image-side surface of the lens barrel, L is the maximum height of the lens barrel, f is the effective focal length of the optical imaging lens, EP34 is the distance between the third spacer element and the fourth spacer element along the optical axis, EP45 is the distance between the fourth spacer element and the fifth spacer element along the optical axis, and T45 is the air gap between the fourth lens and the fifth lens on the optical axis; The spacer assembly further includes a fourth auxiliary spacer element disposed on the image side of the fourth spacer element and in contact with the image side surface of the fourth spacer element, and the optical imaging lens meets the following requirements: 0.20<(CP4+CP4b) / (EP34+EP45)<0.70; Wherein, CP4 is the maximum thickness of the fourth spacer element, CP4b is the maximum thickness of the fourth auxiliary spacer element, EP34 is the spacing distance between the third spacer element and the fourth spacer element along the optical axis, and EP45 is the spacing distance between the fourth spacer element and the fifth spacer element along the optical axis; The optical imaging lens meets the following requirements: 1.15<EP45 / (CP4+CP4b)<3.10; EP45 is the spacing distance between the fourth spacing element and the fifth spacing element along the optical axis, CP4 is the maximum thickness of the fourth spacing element, and CP4b is the maximum thickness of the fourth auxiliary spacing element.

2. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 1.20<D5s / d4m<2.45; Wherein, D5s is the outer diameter of the object-side surface of the fifth spacer element, and d4m is the inner diameter of the image-side surface of the fourth spacer element.

3. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: -4.40mm -1 <f4 / CT4 / d4s<-1.75mm -1 ; Wherein, f4 is the effective focal length of the fourth lens, CT4 is the center thickness of the fourth lens, and d4s is the inner diameter of the object side surface of the fourth spacer element.

4. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 0.20<T45 / L<0.40; and 0.65<d5s / d4m<1.65; Wherein, T45 is the air gap between the fourth lens and the fifth lens on the optical axis, L is the maximum height of the lens barrel, d5s is the inner diameter of the object side surface of the fifth spacing element, and d4m is the inner diameter of the image side surface of the fourth spacing element.

5. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 5.25<f1234 / (d0s-d4s)<7.65; Wherein, f1234 is the combined focal length of the first lens, the second lens, the third lens and the fourth lens, d0s is the inner diameter of the object side of the lens barrel, and d4s is the inner diameter of the object side of the fourth spacer element.

6. The optical imaging lens according to claim 1, wherein: The spacer element further includes a first spacer element disposed on the image side of the first lens and in contact with the image-side surface of the first lens, and a first auxiliary spacer element disposed on the image side of the first spacer element and in contact with the image-side surface of the first spacer element. The optical imaging lens satisfies: 4.75<d1bs / CP1b<6.50; Wherein, d1bs is the inner diameter of the object side of the first auxiliary spacer element, and CP1b is the maximum thickness of the first auxiliary spacer element.

7. The optical imaging lens according to claim 6, wherein: The optical imaging lens meets the following requirements: 2.20<D1bs / d1bs+D1bm / d1bm<2.55; Wherein, D1bs is the outer diameter of the object side surface of the first auxiliary spacer element, d1bs is the inner diameter of the object side surface of the first auxiliary spacer element, D1bm is the outer diameter of the image side surface of the first auxiliary spacer element, and d1bm is the inner diameter of the image side surface of the first auxiliary spacer element.

8. The optical imaging lens according to claim 6, wherein: The optical imaging lens meets the following requirements: 40.20<R1 / (EP01-CT1)<57.85; Wherein, R1 is the curvature radius of the object side surface of the first lens, EP01 is the spacing distance from the object side surface of the lens barrel to the object side surface of the first spacer element along the optical axis, and CT1 is the center thickness of the first lens.

9. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 2.00<T45 / (EP45 / n)<6.05; Wherein, T45 is the air gap between the fourth lens and the fifth lens on the optical axis, EP45 is the spacing distance between the fourth spacer element and the fifth spacer element along the optical axis, and n is the number of spacer elements between the fourth lens and the fifth lens, where n is 2, 3, 4 or 5.

10. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 2.00mm≤d0m / (f×tan(Semi-FOV))<2.30mm; Wherein, d0m is the inner diameter of the image side of the lens barrel, f is the effective focal length of the optical imaging lens, and Semi-FOV is half of the maximum field of view angle of the optical imaging lens.

11. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 1.90<∑CP4 / (SG42+SG51)<4.8; Wherein, ∑CP4 is the sum of the maximum thicknesses of all the spacer elements between the fourth lens and the fifth lens, SG42 is the distance along the optical axis from the intersection of the image side surface of the fourth lens and the optical axis to the object side surface of the spacer element in contact with the image side surface of the fourth lens, and SG51 is the distance along the optical axis from the intersection of the object side surface of the fifth lens and the optical axis to the image side surface of the spacer element in contact with the object side surface of the fifth lens.

12. The optical imaging lens according to claim 1, wherein: The optical imaging lens meets the following requirements: 2.55<T45 / (CT4+CT5)<3.60; and 1.10<EP45 / (CP4+EP34)<3.75; Among them, T45 is the air gap between the fourth lens and the fifth lens on the optical axis, CT4 is the center thickness of the fourth lens, CT5 is the center thickness of the fifth lens, EP45 is the spacing distance between the fourth spacer element and the fifth spacer element along the optical axis, CP4 is the maximum thickness of the fourth spacer element, and EP34 is the spacing distance between the third spacer element and the fourth spacer element along the optical axis.

Images