Optical photographic lens

Abstract

The optical photographic lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are sequentially arranged from an object side to an image side along an optical axis, and an air gap is formed between any two adjacent lenses; the seven lenses comprise at least one aspheric lens; the number of the lenses with focal power in the lens is seven; a fourth spacing element in contact with the image side surface of the fourth lens is arranged between the fourth lens and the fifth lens; the maximum thickness CP4 of the fourth spacing element, the air spacing T45 of the fourth lens and the fifth lens on the optical axis, the curvature radius R8 of the image side surface of the fourth lens, the inner diameter d4s of the object side surface of the fourth spacing element, the curvature radius R9 of the object side surface of the fifth lens and the inner diameter d4m of the image side surface of the fourth spacing element meet the following conditions: 3.85 < CP4 / T45 < 19.6,-1.0 < R8 / d4s <-0.4 and 2.15 < R9 / d4m < 2.55.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and more specifically, to an optical photography lens. Background Art

[0002] Nowadays, people are increasingly accustomed to recording and sharing their lives through video. Numerous products on the market, such as mobile phones, cameras, and action cameras, can meet these needs. While mobile phone video capture is convenient, its image quality, image stabilization, and functionality are inferior to those of professional handheld devices, such as micro-single cameras. These cameras are also bulky and lack portability. Handheld gimbal cameras offer a solution to these challenges, offering excellent image quality while being small enough to fit in a pocket. As the primary medium for capturing images, the device's main camera must possess key performance characteristics, such as high resolution, minimal distortion, and excellent anti-glare performance, to effectively deliver the desired shooting capabilities. Utility Model Content

[0003] The present application provides an optical photography lens, which may include a lens group and at least one spacer element. The lens group may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in sequence from the object side to the image side along the optical axis, and an air gap is provided between any two adjacent lenses among the first lens to the seventh lens; at least one aspherical lens is included among the first lens to the seventh lens; the number of lenses having optical power in the optical photography lens is seven; and the at least one spacer element includes a fourth spacer element located between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens. The optical photography lens satisfies the following conditions: 3.85<CP4 / T45<19.6, -1.0<R8 / d4s<-0.4, and 2.15<|R9 / d4m|<2.55, wherein CP4 is the maximum thickness of the fourth spacer, T45 is the air space between the fourth lens element and the fifth lens element on the optical axis, R8 is the radius of curvature of the image side surface of the fourth lens element, d4s is the inner diameter of the object side surface of the fourth spacer element, R9 is the radius of curvature of the object side surface of the fifth lens element, and d4m is the inner diameter of the image side surface of the fourth spacer element.

[0004] In one embodiment, the at least one spacer element may further include a second spacer element located between the second lens and the third lens and in contact with the image side surface of the second lens. The center thickness CT2 of the second lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, and the maximum thickness CP2 of the second spacer element may satisfy: 1.1<CT2 / (T23+CP2)≤4.4.

[0005] In one embodiment, the at least one spacer element may further include a first spacer element located between the first lens and the second lens and in contact with the image side surface of the first lens; the curvature radius R1 of the object side surface of the first lens, the refractive index N1 of the first lens, and the inner diameter d1s of the object side surface of the first spacer element may satisfy: 1.4<|R1×N1| / d1s<6.5.

[0006] In one embodiment, the optical photography lens may further include a lens barrel, in which the lens group and at least one spacer element are assembled; and the at least one spacer element may further include a first spacer element located between the first lens and the second lens and in contact with the image side surface of the first lens; the distance EP01 from the object side end surface of the lens barrel to the object side surface of the first spacer element on the optical axis, the center thickness CT1 of the first lens on the optical axis, and the air gap T12 between the first lens and the second lens on the optical axis may satisfy: 0.1≤(EP01-CT1) / (CT1+T12)≤0.4.

[0007] In one embodiment, the at least one spacer element may further include a first spacer element located between the first lens and the second lens and in contact with the image side surface of the first lens; the curvature radius R2 of the image side surface of the first lens and the outer diameter D1s of the object side surface of the first spacer element may satisfy: 1.05<|R2 / D1s|<4.3.

[0008] In one embodiment, at least one spacer element may further include a first spacer element located between the first lens and the second lens and in contact with the image side surface of the first lens, and a second spacer element located between the second lens and the third lens and in contact with the image side surface of the second lens; the curvature radius R3 of the object side surface of the second lens, the outer diameter D2s of the object side surface of the second spacer element, and the outer diameter D1m of the image side surface of the first spacer element may satisfy: 7.3<R3 / (D2s-D1m)<15.4.

[0009] In one embodiment, at least one spacer element may further include a second spacer element located between the second lens and the third lens and in contact with the image side surface of the second lens, and a third spacer element located between the third lens and the fourth lens and in contact with the image side surface of the third lens; the effective focal length f3 of the third lens, the center thickness CT3 of the third lens on the optical axis, the maximum thickness CP2 of the second spacer element, and the maximum thickness CP3 of the third spacer element may satisfy: -39.1<f3 / (CT3+CP2+CP3)≤-11.0.

[0010] In one embodiment, the first lens has positive or negative optical power; the second lens has positive or negative optical power, and its object-side surface is convex; the third lens has negative optical power, and its object-side surface is concave; the fourth lens has positive optical power, and its image-side surface is convex; the fifth lens has positive optical power, and its image-side surface is convex; the sixth lens has negative optical power, and its object-side surface is convex and its image-side surface is concave; the seventh lens has negative optical power.

[0011] In one embodiment, at least one spacer element may further include a third spacer element located between the third lens and the fourth lens and in contact with the image side surface of the third lens, and a fourth spacer element located between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens; the curvature radius R7 of the object side surface of the fourth lens, the curvature radius R6 of the image side surface of the third lens, the inner diameter d4s of the object side surface of the fourth spacer element, and the inner diameter d3m of the image side surface of the third spacer element may satisfy: 1.35<|R7 / R6|×(d4s / d3m)≤2.4.

[0012] In one embodiment, at least one spacer element may further include a third spacer element located between the third lens and the fourth lens and in contact with the image side surface of the third lens, and a fourth spacer element located between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens; the center thickness CT4 of the fourth lens on the optical axis, the distance EP34 from the image side surface of the third spacer element to the object side surface of the fourth spacer element on the optical axis, and the maximum thickness CP4 of the fourth spacer element may satisfy: 0.7<CT4 / (EP34+CP4)<1.05.

[0013] In one embodiment, the at least one spacer element may further include a fourth spacer element located between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens, and a fifth spacer element located between the fifth lens and the sixth lens and in contact with the image side surface of the fifth lens; the distance EP45 from the image side surface of the fourth spacer element to the object side surface of the fifth spacer element on the optical axis, the maximum thickness CP5 of the fifth spacer element, and the center thickness CT5 of the fifth lens on the optical axis may satisfy: 0.8<(EP45+CP5) / CT5<2.3.

[0014] In one embodiment, the at least one spacer element may further include a fifth spacer element located between the fifth lens and the sixth lens and in contact with the image side surface of the fifth lens; the curvature radius R11 of the object side surface of the sixth lens, the inner diameter d5s of the object side surface of the fifth spacer element, and the inner diameter d5m of the image side surface of the fifth spacer element may satisfy: 5.8<R11 / |d5s-d5m|<11.6.

[0015] In one embodiment, the at least one spacer element may further include a fifth spacer element located between the fifth lens and the sixth lens and in contact with the image side surface of the fifth lens; the curvature radius R12 of the image side surface of the sixth lens and the outer diameter D5m of the image side surface of the fifth spacer element may satisfy: 0.25<R12 / D5m<0.6.

[0016] In one embodiment, the at least one spacer element may further include a fifth spacer element located between the fifth lens and the sixth lens and in contact with the image side surface of the fifth lens, and a sixth spacer element located between the sixth lens and the seventh lens and in contact with the image side surface of the sixth lens; the air gap T67 between the sixth lens and the seventh lens on the optical axis, the distance EP56 on the optical axis from the image side surface of the fifth spacer element to the object side surface of the sixth spacer element, and the center thickness CT7 of the seventh lens on the optical axis may satisfy: 4.1<T67 / EP56+T67 / CT7<6.3.

[0017] In one embodiment, the effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens may satisfy: 0.33<f6 / f7≤2.0.

[0018] In one embodiment, the at least one spacer element may further include a sixth spacer element located between the sixth lens and the seventh lens and in contact with the image side surface of the sixth lens; the curvature radius R13 of the object side surface of the seventh lens and the inner diameter d6m of the image side surface of the sixth spacer element may satisfy: 0.45<|R13 / d6m|≤0.7.

[0019] In one embodiment, the at least one spacer element may further include a sixth spacer element located between the sixth lens and the seventh lens and in contact with the image side surface of the sixth lens; the curvature radius R14 of the image side surface of the seventh lens, the outer diameter D6m of the image side surface of the sixth spacer element, and the inner diameter d6m of the image side surface of the sixth spacer element may satisfy: 1.14<|R14| / (D6m-d6m)≤1.85.

[0020] According to an embodiment of the present application, an optical photographic lens includes a lens group and at least one spacer element, the lens group includes first to seventh lenses arranged in sequence from the object side to the image side along the optical axis, wherein an air gap is provided between any two adjacent lenses; at least one aspherical lens is included among the first to seventh lenses; the number of lenses having optical focal length in the optical photographic lens is seven; the at least one spacer element includes a fourth spacer element located between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens; the maximum thickness CP4 of the fourth spacer element and the air gap T45 on the optical axis between the fourth lens and the fifth lens satisfy the condition 3.85<CP4 / T45<19.6; the curvature radius R8 of the image side surface of the fourth lens and the inner diameter d4s of the object side surface of the fourth spacer element satisfy the condition -1.0<R8 / d4s<-0.4; the curvature radius R9 of the object side surface of the fifth lens and the inner diameter d4m of the image side surface of the fourth spacer element satisfy the condition 2.15<|R9 / d4m|<2.55. This configuration of the optical photography lens enables the lens to achieve the technical characteristics of high pixel resolution and low distortion. The ratio of the maximum thickness CP4 of the fourth spacer element to the air gap between the fourth and fifth lenses satisfies the aforementioned conditional equation of 3.85 < CP4 / T45 < 19.6. This means that the effective diameter edges of the fourth and fifth lenses span a large area, necessitating the placement of a thicker spacer element there for spacing. Furthermore, the angle of the field of view at this edge is steep, and when incident light at large angles enters, there is a certain risk of stray light reflected from the inner diameter slope of this spacer element. By simultaneously controlling the conditions of -1.0 < R8 / d4s < -0.4 and 2.15 < |R9 / d4m| < 2.55, this stray light can be effectively controlled and suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, purposes and advantages of the present application will become more apparent through the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

[0022] Figure 1 A schematic diagram showing the structure and related parameters of an optical photographic lens according to an exemplary embodiment of the present application is shown;

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

[0024] Figure 3 1. A schematic structural diagram of an optical photographic lens according to Example 2 of the present application is shown;

[0025] Figures 4 to 7 axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical photographic lenses according to Example 1 and Example 2 of the present application are respectively shown;

[0026] Figure 8 1. A schematic structural diagram of an optical photographic lens according to Example 3 of the present application is shown;

[0027] Figure 9 1. A schematic structural diagram of an optical photographic lens according to Example 4 of the present application is shown;

[0028] Figures 10 to 13 axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical photographic lenses according to Example 3 and Example 4 of the present application are respectively shown;

[0029] Figure 14 1. A schematic structural diagram of an optical photographic lens according to Example 5 of the present application is shown;

[0030] Figure 15 1. A schematic structural diagram of an optical photographic lens according to Example 6 of the present application is shown;

[0031] Figures 16 to 19 axial chromatic aberration curve, astigmatism curve, distortion curve, and lateral chromatic aberration curve of the optical photographic lenses according to Examples 5 and 6 of the present application are respectively shown;

[0032] Figure 20 The figure shows the light spot formed by stray light reflected by the inner diameter slope of the fourth spacer element when the optical photography lens according to the exemplary embodiment of the present application satisfies the conditional expression R8 / d4s=-0.2;

[0033] Figure 21 Schematic diagram showing the incident and reflected directions of light on the inner diameter inclined surface of the fourth spacer element when the optical photography lens satisfies the conditional expression R8 / d4s=-0.2 according to an exemplary embodiment of the present application;

[0034] Figure 22 The figure shows the light spot formed by stray light reflected by the inner diameter slope of the fourth spacer element when the optical photography lens according to the exemplary embodiment of the present application satisfies the conditional expression R8 / d4s=-0.7;

[0035] Figure 23 Schematic diagram showing the incident and reflected directions of light on the inner diameter inclined surface of the fourth spacer element when the optical photography lens satisfies the conditional expression R8 / d4s=-0.7 according to an exemplary embodiment of the present application;

[0036] Figure 24 1. The optical photography lens according to an exemplary embodiment of the present application satisfies the conditional expression R8 / d4s=-1.2 and the light spot formed by stray light reflected by the inner diameter inclined surface of the fourth spacer element; and

[0037] Figure 25Schematic diagram showing the incident direction and reflection direction of light on the inner diameter inclined surface of the fourth spacer element when the optical photography lens satisfies the conditional expression R8 / d4s=-1.2 according to an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0038] 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.

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

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

[0041] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial area. The judgment of the surface shape in the paraxial area can be judged according to the general method in this field, for example, the positive and negative R value (R refers to the curvature radius of the paraxial area) is used to judge the convexity. In this article, the surface of each lens closest to the subject is called the object side of the lens, and the surface of each lens closest to the imaging surface is called the image side of the lens. In terms of the object side, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave; in terms of the image side, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0042] The solutions described in the embodiments of this application can be simulated using software / tools such as ZEMAX and CODE V. The solutions described in some embodiments can preferably be simulated using CODE V. During the simulation process using the above-mentioned software / tools, the lens surface shape can be appropriately adjusted based on the surface shape model provided by the software / tool ​​used.

[0043] 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.

[0044] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and will not be interpreted in an idealized or overly formal sense unless expressly defined as such herein.

[0045] 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.

[0046] The features, principles and other aspects of the present application are described in detail below.

[0047] An optical photography lens according to an exemplary embodiment of the present application may include a lens group and at least one spacer element. The lens group may be a seven-lens group, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. In an exemplary embodiment, the first through seventh lenses may be arranged sequentially along the optical axis from the object side to the image side.

[0048] In exemplary embodiments, any two adjacent lenses among the first to seventh lenses may have an air gap therebetween.

[0049] In an exemplary embodiment, at least one of the first through seventh lenses may include an aspheric lens. Aspheric lenses have a better curvature radius and can improve distortion and astigmatism. Using an aspheric lens can minimize aberrations that occur during imaging, thereby improving image quality.

[0050] In an exemplary embodiment, the number of lenses having optical power in the optical photography lens is seven.

[0051] In example embodiments, the at least one spacer element in the optical photographic lens may include a fourth spacer element positioned between the fourth lens and the fifth lens and in contact with the image-side surface of the fourth lens.

[0052] In an exemplary embodiment, the optical photography lens of the present application may satisfy the condition 3.85 < CP4 / T45 < 19.6, where CP4 is the maximum thickness of the fourth spacer element, and T45 is the air spacing between the fourth and fifth lenses on the optical axis. The maximum thickness of the fourth spacer element may be the maximum thickness of the fourth spacer element along or parallel to the optical axis, and the air spacing between the fourth and fifth lenses on the optical axis may be the distance on the optical axis from the image-side surface of the fourth lens to the object-side surface of the fifth lens.

[0053] In an exemplary embodiment, the optical photography lens of the present application may satisfy the conditional formula: -1.0<R8 / d4s<-0.4, where R8 is the curvature radius of the image-side surface of the fourth lens element, and d4s is the inner diameter of the object-side surface of the fourth spacer element.

[0054] In an exemplary embodiment, the optical photography lens of the present application may satisfy the conditional formula 2.15<|R9 / d4m|<2.55, where R9 is the curvature radius of the object-side surface of the fifth lens element, and d4m is the inner diameter of the image-side surface of the fourth spacer element.

[0055] According to an embodiment of the present application, an optical photographic lens includes a lens group and at least one spacer element, the lens group includes first to seventh lenses arranged in sequence from the object side to the image side along the optical axis, wherein an air gap is provided between any two adjacent lenses; at least one aspherical lens is included among the first to seventh lenses; the number of lenses having optical focal length in the optical photographic lens is seven; the at least one spacer element includes a fourth spacer element located between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens; the maximum thickness CP4 of the fourth spacer element and the air gap T45 on the optical axis between the fourth lens and the fifth lens satisfy the condition 3.85<CP4 / T45<19.6; the curvature radius R8 of the image side surface of the fourth lens and the inner diameter d4s of the object side surface of the fourth spacer element satisfy the condition -1.0<R8 / d4s<-0.4; the curvature radius R9 of the object side surface of the fifth lens and the inner diameter d4m of the image side surface of the fourth spacer element satisfy the condition 2.15<|R9 / d4m|<2.55. This configuration of the optical photography lens enables the lens to achieve the technical characteristics of high pixel density and low distortion. The ratio of the maximum thickness CP4 of the fourth spacer element to the air gap between the fourth and fifth lenses satisfies the aforementioned conditional equation of 3.85 < CP4 / T45 < 19.6. This means that the effective diameter edges of the fourth and fifth lenses span a large area, necessitating the placement of a thicker spacer element (i.e., the fourth spacer element) for spacing. Furthermore, the angle of light at the edge of the field of view is steep, and when incident light at high angles enters, there is a certain risk of stray light reflected from the inner diameter slope of the fourth spacer element. By simultaneously controlling the conditions of -1.0 < R8 / d4s < -0.4 and 2.15 < |R9 / d4m| < 2.55, this stray light can be effectively controlled and suppressed.

[0056] Figure 20 and Figure 21 The diagrams respectively show the light spot formed by stray light reflected from the inner diameter slope of the fourth spacing element P4' and the incident and reflected directions of light on the inner diameter slope of the fourth spacing element P4' when the optical photography lens according to an exemplary embodiment of the present application satisfies the conditional expression R8 / d4s=-0.2. Figure 21 It can be seen that, for example, a fourth spacing element P4′ and a fourth auxiliary spacing element P4b′ are provided between the fourth lens element E4′ and the fifth lens element E5′. The object-side surface of the fourth spacing element P4′ may be in direct contact with the image-side surface of the fourth lens element E4′, and the fourth auxiliary spacing element P4b′ may be located between the fourth spacing element P4′ and the fifth lens element E5′, and the image-side surface of the fourth auxiliary spacing element P4b′ may be in direct contact with the object-side surface of the fifth lens element E5′. The incident direction of, for example, a marginal field ray emitted through the fourth lens E4′ that is incident on the inner diameter inclined surface of the fourth spacing element P4′, and the reflection direction of the ray after being reflected by the inner diameter inclined surface of the fourth spacing element P4′ are shown as follows: Figure 21As shown in FIG, it can be seen that the reflected light is not intercepted by the fourth auxiliary spacer element P4b′ and will further enter the rear optical system to form stray light. Figure 20 It can be seen that the light spot formed by the inner diameter reflection of the fourth spacing element P4' has a larger area and a higher intensity, which is close to the threshold.

[0057] Figure 22 Figure 23 The diagrams respectively show the light spot formed by stray light reflected from the inner diameter slope of the fourth spacing element P4 when the optical photography lens according to an exemplary embodiment of the present application satisfies the conditional expression R8 / d4s=-0.7, and the incident and reflected directions of light from the inner diameter slope of the fourth spacing element P4. Figure 23 It can be seen that, for example, a fourth spacing element P4 and a fourth auxiliary spacing element P4b are provided between the fourth lens element E4 and the fifth lens element E5, wherein the object-side surface of the fourth spacing element P4 may be in direct contact with the image-side surface of the fourth lens element E4, the fourth auxiliary spacing element P4b may be located between the fourth spacing element P4 and the fifth lens element E5, and the image-side surface of the fourth auxiliary spacing element P4b may be in direct contact with the object-side surface of the fifth lens element E5; the incident direction of, for example, a marginal field ray emitted through the fourth lens E4 and incident on the inner diameter inclined surface of the fourth spacing element P4, and the reflection direction of the ray after being reflected by the inner diameter inclined surface of the fourth spacing element P4 are shown as follows: Figure 23 As shown, it can be seen that the reflected light can be effectively intercepted / blocked by, for example, the fourth auxiliary spacer element P4b and will not be incident further on the rear optical system, which can effectively avoid or reduce the formation of stray light here. Figure 22 It can be seen that the light spot formed by the inner diameter reflection of the fourth spacing element P4 has a small area and a very low intensity.

[0058] Figure 24 and Figure 25 The figures respectively show the light spot formed by stray light reflected from the inner diameter slope of the fourth spacing element P4″ and the incident and reflected directions of light from the inner diameter slope of the fourth spacing element P4″ when the optical photography lens according to an exemplary embodiment of the present application satisfies the conditional expression R8 / d4s=-1.2. Figure 25 It can be seen that, for example, a fourth spacing element P4″ and a fourth auxiliary spacing element P4b″ are provided between the fourth lens element E4″ and the fifth lens element E5″. The object-side surface of the fourth spacing element P4″ may be in direct contact with the image-side surface of the fourth lens element E4″, the fourth auxiliary spacing element P4b″ may be located between the fourth spacing element P4″ and the fifth lens element E5″, and the image-side surface of the fourth auxiliary spacing element P4b″ may be in direct contact with the object-side surface of the fifth lens element E5″. The incident direction of, for example, a marginal field ray emitted through the fourth lens E4″ that is incident on the inner diameter inclined surface of the fourth spacing element P4″, and the reflection direction of the ray after being reflected by the inner diameter inclined surface of the fourth spacing element P4″ are shown as follows: Figure 25As shown in FIG. 1 , it can be seen that the reflected light is not intercepted by the fourth auxiliary spacer element P4b″ and further enters the rear optical system to form stray light. Figure 24 It can be seen that the light spot area formed by the inner diameter reflection of the fourth spacer element P4″ is also larger and the intensity is also higher.

[0059] Analysis and comparison Figures 20 to 25 As can be seen from the three different situations shown above, the optical photography lens according to the embodiment of the present application satisfies the conditions 3.85<CP4 / T45<19.6 and 2.15<|R9 / d4m|<2.55 by reasonably setting the optical powers of the first to seventh lenses and the fourth spacer element. At the same time, the ratio of the radius of curvature R8 of the image side surface of the fourth lens to the inner diameter d4s of the object side surface of the fourth spacer element is set to satisfy the range of -1.0<R8 / d4s<-0.4. This can effectively control the risk of stray light generated by reflection of large-angle incident light at the edge of the field of view between the fourth and fifth lenses when it enters the inner diameter inclined surface of the thicker spacer element set there due to the large span of the effective edge of the fourth and fifth lenses, significantly suppressing the generation of stray light at this location and improving lens performance.

[0060] In an exemplary embodiment, the first lens may have positive or negative optical power. The second lens may have positive or negative optical power. The third lens may have negative optical power. The fourth lens may have positive optical power. The fifth lens may have positive optical power. The sixth lens may have negative optical power. The seventh lens may have negative optical power.

[0061] In an exemplary embodiment, the object-side surface of the first lens may be concave or convex, and the image-side surface may be convex or concave. The object-side surface of the second lens may be convex, and the image-side surface may be convex or concave. The object-side surface of the third lens may be concave, and the image-side surface may be convex or concave. The object-side surface of the fourth lens may be convex or concave, and the image-side surface may be convex. The object-side surface of the fifth lens may be concave or convex, and the image-side surface may be convex. The object-side surface of the sixth lens may be convex, and the image-side surface may be concave. The object-side surface of the seventh lens may be concave or convex, and the image-side surface may be convex or concave.

[0062] In example embodiments, the at least one spacer element in the optical photographic lens may further include a first spacer element positioned between the first lens and the second lens and in contact with the image-side surface of the first lens.

[0063] In example embodiments, the at least one spacer element in the optical photographic lens may further include a second spacer element positioned between the second lens and the third lens and in contact with the image-side surface of the second lens.

[0064] In example embodiments, the at least one spacer element in the optical photographic lens may further include a third spacer element positioned between the third lens and the fourth lens and in contact with the image-side surface of the third lens.

[0065] In example embodiments, the at least one spacer element in the optical photographic lens may further include a fifth spacer element positioned between the fifth lens and the sixth lens and in contact with the image-side surface of the fifth lens.

[0066] In example embodiments, the at least one spacer element in the optical photographic lens may further include a sixth spacer element positioned between the sixth lens and the seventh lens and in contact with the image-side surface of the sixth lens.

[0067] In an exemplary embodiment, the optical photographic lens may further include a lens barrel, and the lens group and the at least one spacer element may be assembled in the lens barrel.

[0068] In an exemplary embodiment, the optical photography lens of the present application can satisfy the conditional formula 1.1 < CT2 / (T23 + CP2) ≤ 4.4, where CT2 is the center thickness of the second lens on the optical axis, T23 is the air spacing between the second and third lenses on the optical axis, and CP2 is the maximum thickness of the second spacer element. The maximum thickness of the second spacer element can be the maximum thickness of the second spacer element along or parallel to the optical axis, and the air spacing between the second and third lenses on the optical axis can be the distance on the optical axis from the image side surface of the second lens to the object side surface of the third lens. By controlling the optical photography lens to satisfy the conditional formula 1.1 < CT2 / (T23 + CP2) ≤ 4.4, the center thickness of the second lens, the thickness of the second spacer element, and the air gap between the second and third lenses can be directly controlled, which is beneficial to the overall center thickness to edge thickness ratio of the second lens, ensuring the molding feasibility of the second lens and improving its molding stability. At the same time, it can effectively ensure the strength of the second lens and the second spacer element, improving assembly stability.

[0069] In an exemplary embodiment, the optical photography lens of the present application can satisfy the conditional formula 1.4<|R1×N1| / d1s<6.5, where R1 is the radius of curvature of the object side surface of the first lens, N1 is the refractive index of the first lens, and d1s is the inner diameter of the object side surface of the first spacer element. By controlling the optical photography lens to satisfy the conditional formula 1.4<|R1×N1| / d1s<6.5, the radius of curvature and refractive index of the object side surface of the first lens and the inner diameter of the object side surface of the first spacer element can be directly controlled, thereby facilitating the refraction angle of each field of view light entering the first lens. At the same time, the reasonable setting of the inner diameter of the first spacer element can effectively avoid the total reflection stray light path and the refraction stray light path generated by the first lens structure. More specifically, R1, N1, and d1s can satisfy: 1.45<|R1×N1| / d1s<6.45. Furthermore, R1, N1, and d1s may satisfy: 1.46≤|R1×N1| / d1s≤6.44.

[0070] In an exemplary embodiment, the optical photography lens of the present application may satisfy the conditional equation 0.1 ≤ (EP01 - CT1) / (CT1 + T12) ≤ 0.4, where EP01 is the distance on the optical axis from the object-side end surface of the lens barrel to the object-side surface of the first spacer element, CT1 is the center thickness of the first lens element on the optical axis, and T12 is the air gap between the first lens element and the second lens element on the optical axis. The object-side end surface of the lens barrel may be the surface or end surface of the lens barrel closest to the object side and perpendicular or nearly perpendicular to the optical axis; the air gap between the first lens element and the second lens element on the optical axis may be the distance on the optical axis from the image-side surface of the first lens element to the object-side surface of the second lens element. By controlling the optical photographic lens to satisfy the conditional formula 0.1≤(EP01-CT1) / (CT1+T12)≤0.4, the thickness of the supporting surface at the object-side end of the lens barrel, the edge thickness and the center thickness of the first lens element can be directly controlled, and the thickness of the first spacer element can be indirectly controlled. This can effectively ensure the strength of the supporting surface at the front end / object-side end of the lens barrel, which is beneficial for ensuring the stability of the overall lens assembly process and the reliability requirements of mechanical reliability such as drops. At the same time, it is beneficial for ensuring the level of the edge thickness of the first lens and the thickness of the first spacer element, which is beneficial for improving the structural stability of the front end of the lens assembly.

[0071] In an exemplary embodiment, the optical photography lens of the present application can satisfy the conditional equation 1.05 < |R2 / D1s| < 4.3, where R2 is the radius of curvature of the image-side surface of the first lens element, and D1s is the outer diameter of the object-side surface of the first spacer element. By controlling the optical photography lens to satisfy the conditional equation 1.05 < |R2 / D1s| < 4.3, the radius of curvature of the image-side surface of the first lens element and the outer diameter of the first spacer element can be properly controlled, effectively ensuring the refraction direction and angle of imaging light from each field of view after passing through the first lens. Furthermore, the outer diameter of the first spacer element can control the compressive torque applied to the first spacer element during assembly, reducing the impact on the rear components during assembly and improving the overall assembly stability of the lens.

[0072] In an exemplary embodiment, the optical photography lens of the present application can satisfy the conditional equation 7.3 < R3 / (D2s - D1m) < 15.4, where R3 is the radius of curvature of the object-side surface of the second lens element, D2s is the outer diameter of the object-side surface of the second spacer element, and D1m is the outer diameter of the image-side surface of the first spacer element. By controlling the optical photography lens to satisfy the conditional equation 7.3 < R3 / (D2s - D1m) < 15.4, non-imaging light entering / emitted from the second lens can be directly controlled. The internal aperture of the spacer elements before and after the second lens can intercept the transmitted and internally reflected stray light of the second lens, thereby reducing glare in the overall lens and improving image cleanliness.

[0073] In an exemplary embodiment, the optical photography lens of the present application can satisfy the condition: -39.1 < f3 / (CT3 + CP2 + CP3) ≤ -11.0, where f3 is the effective focal length of the third lens element, CT3 is the center thickness of the third lens element on the optical axis, CP2 is the maximum thickness of the second spacer element, and CP3 is the maximum thickness of the third spacer element. The maximum thickness of the spacer element can be the maximum thickness of the spacer element along or parallel to the optical axis. By controlling the optical photography lens to satisfy the condition: -39.1 < f3 / (CT3 + CP2 + CP3) ≤ -11.0, the focal length of the third lens can be effectively controlled. The thicknesses of the second and third spacers, as well as the center-to-thickness distribution of the third lens, can be regulated, effectively ensuring that the thicknesses of the second and third spacers are at appropriate levels, enhancing assembly stability and improving the yield of the assembly manufacturing process. More specifically, f3, CT3, CP2, and CP3 can further satisfy: -39.1 < f3 / (CT3 + CP2 + CP3) ≤ -11.1.

[0074] In an exemplary embodiment, the optical photography lens of the present application can satisfy the conditional equation 1.35 < |R7 / R6| × (d4s / d3m) ≤ 2.4, where R7 is the radius of curvature of the object-side surface of the fourth lens element, R6 is the radius of curvature of the image-side surface of the third lens element, d4s is the inner diameter of the object-side surface of the fourth spacer element, and d3m is the inner diameter of the image-side surface of the third spacer element. By controlling the optical photography lens to satisfy the conditional equation 1.35 < |R7 / R6| × (d4s / d3m) ≤ 2.4, the radii of curvature of the image-side surface of the third lens element and the object-side surface of the fourth lens element can be effectively controlled, ensuring that imaging light is refracted in the desired direction between the third and fourth lenses. Simultaneously, controlling the inner diameters of the image-side surface of the third spacer element and the object-side surface of the fourth spacer element can effectively control and reduce the intensity of stray light from the fourth lens element, intercepting a portion of the transmitted and reflected stray light paths.

[0075] In an exemplary embodiment, the optical photography lens of the present application can satisfy the conditional formula 0.7 < CT4 / (EP34 + CP4) < 1.05, where CT4 is the center thickness of the fourth lens on the optical axis, EP34 is the distance on the optical axis from the image side surface of the third spacer element to the object side surface of the fourth spacer element, and CP4 is the maximum thickness of the fourth spacer element. The maximum thickness of the spacer element can be the maximum thickness of the spacer element along the optical axis or parallel to the optical axis. By controlling the optical photography lens to satisfy the conditional formula 0.7 < CT4 / (EP34 + CP4) < 1.05, the center thickness level of the fourth lens can be reasonably guaranteed, and the edge thickness of the fourth lens and the overall thickness of the fourth spacer element can be controlled. The thickness ratio of the fourth lens can be reasonably controlled, improving the molding feasibility of the fourth lens and reducing the risk of weld marks. At the same time, the structural strength of the fourth spacer element can be effectively guaranteed.

[0076] In an exemplary embodiment, the optical photography lens of the present application can satisfy the conditional formula 0.8<(EP45+CP5) / CT5<2.3, wherein EP45 is the distance on the optical axis from the image side surface of the fourth spacer element to the object side surface of the fifth spacer element, CP5 is the maximum thickness of the fifth spacer element, and CT5 is the center thickness of the fifth lens on the optical axis. The maximum thickness of the spacer element can be the maximum thickness of the spacer element along the optical axis or parallel to the optical axis. By controlling the optical photography lens to satisfy the conditional formula 0.8<(EP45+CP5) / CT5<2.3, the edge thickness of the fifth lens, the thickness of the fifth spacer element, and the center thickness of the fifth lens can be directly controlled, the thickness ratio of the fifth lens can be reasonably controlled, the molding feasibility of the fifth lens can be improved, the risk of weld marks can be reduced, and the structural strength of the fifth spacer element can be effectively guaranteed. More specifically, EP45, CP5, and CT5 can also satisfy: 0.8<(EP45+CP5) / CT5<2.26. Furthermore, EP45, CP5 and CT5 may also satisfy: 0.84≤(EP45+CP5) / CT5≤2.24.

[0077] In an exemplary embodiment, the optical photography lens of the present application can satisfy the conditional formula 5.8<R11 / |d5s-d5m|<11.6, wherein R11 is the radius of curvature of the object side surface of the sixth lens, d5s is the inner diameter of the object side surface of the fifth spacer element, and d5m is the inner diameter of the image side surface of the fifth spacer element. By controlling the optical photography lens to satisfy the conditional formula 5.8<R11 / |d5s-d5m|<11.6, the refraction path of the imaging light passing through the fifth and sixth lenses can be effectively controlled, and the bearing misalignment between the fifth spacer element and the sixth lens can be reduced, which is conducive to ensuring the assembly stability of the large step difference structure here. More specifically, R11, d5s, and d5m can also satisfy: 5.83<R11 / |d5s-d5m|<11.55. Further, R11, d5s, and d5m can also satisfy: 5.85≤R11 / |d5s-d5m|≤11.53.

[0078] In an exemplary embodiment, the optical photography lens of the present application can satisfy the conditional equation 0.25 < R12 / D5m < 0.6, where R12 is the radius of curvature of the image-side surface of the sixth lens element, and D5m is the outer diameter of the image-side surface of the fifth spacer element. By controlling the ratio of the radius of curvature of the image-side surface of the sixth lens element to the outer diameter of the image-side surface of the fifth spacer element within this range, the outer diameter of the sixth lens element can be indirectly maintained within an appropriate range, thereby controlling the possibility of stray light reflected from the structure area of ​​the sixth lens element. Simultaneously, controlling the radius of curvature of the image-side surface of the sixth lens element can also optimize the control of reflected ghost images on the image-side surface of the sixth lens element and the object-side surface of the seventh lens element.

[0079] In an exemplary embodiment, the optical photography lens of the present application can satisfy the conditional equation 4.1 < T67 / EP56 + T67 / CT7 < 6.3, where T67 is the air spacing between the sixth and seventh lenses on the optical axis, i.e., the distance on the optical axis from the image side of the sixth lens to the object side of the seventh lens; EP56 is the distance on the optical axis from the image side of the fifth spacer element to the object side of the sixth spacer element; and CT7 is the center thickness on the optical axis of the seventh lens. By controlling the optical photography lens to satisfy the conditional equation 4.1 < T67 / EP56 + T67 / CT7 < 6.3, the edge thickness of the sixth lens and the center thickness of the seventh lens can be effectively controlled, thereby facilitating the molding stability of the last two lenses, ensuring the stability of lens surface decentration and other data, and helping to improve the MTF performance yield. More specifically, T67, EP56, and CT7 can also satisfy the following: 4.1 < T67 / EP56 + T67 / CT7 < 6.25. Furthermore, T67, EP56 and CT7 can also satisfy: 4.11≤T67 / EP56+T67 / CT7≤6.23.

[0080] In an exemplary embodiment, the optical photography lens of the present application can satisfy the conditional equation 0.33 < f6 / f7 ≤ 2.0, where f6 is the effective focal length of the sixth lens element and f7 is the effective focal length of the seventh lens element. By controlling the ratio of the effective focal length of the sixth lens to the effective focal length of the seventh lens element within this range, the effective focal lengths of the sixth and seventh lenses can be directly controlled, thereby adjusting the refraction of full-field light at the rear end of the optical system to propagate in a desired direction, ultimately achieving a predetermined image height. This can also somewhat reduce the surface sensitivity of the overall outer field MTF.

[0081] In an exemplary embodiment, the optical photography lens of the present application can satisfy the conditional equation 0.45 < |R13 / d6m| ≤ 0.7, where R13 is the radius of curvature of the object-side surface of the seventh lens element, and d6m is the inner diameter of the image-side surface of the sixth spacer element. By controlling the optical photography lens to satisfy the conditional equation 0.45 < |R13 / d6m| ≤ 0.7, the outer diameter of the seventh lens element and the direction of its refraction can be effectively guaranteed, thereby facilitating control of the reflection path of stray light at the seventh lens element structure, and reducing the stray light intensity of the final lens element to a certain extent.

[0082] In an exemplary embodiment, the optical photography lens of the present application can satisfy the conditional equation 1.14 < |R14| / (D6m - d6m) ≤ 1.85, where R14 is the radius of curvature of the image-side surface of the seventh lens element, D6m is the outer diameter of the image-side surface of the sixth spacer element, and d6m is the inner diameter of the image-side surface of the sixth spacer element. By controlling the optical photography lens to satisfy the conditional equation 1.14 < |R14| / (D6m - d6m) ≤ 1.85, the contact area between the sixth spacer element and the seventh lens can be ensured, thereby ensuring the stability of the contact area between the sixth spacer element and the seventh lens element, thereby improving the overall lens assembly stability. This can also indirectly control the surface shape of the seventh lens element facing the light-emitting side, thereby improving the workability of the seventh lens element.

[0083] In exemplary embodiments, the optical photography lens of the present application may include at least one aperture. The aperture can constrain the optical path and control the light intensity. The aperture can be positioned appropriately within the optical photography lens. For example, the aperture can be positioned between the first and second lenses; alternatively, the aperture can be positioned between the object side and the first lens; alternatively, the aperture can be positioned between the second and third lenses.

[0084] In an exemplary embodiment, optionally, the optical photography lens may further include a filter for correcting color deviation and / or a protective glass for protecting a photosensitive element located on the imaging surface.

[0085] On the one hand, according to an embodiment of the present application, an optical photography lens includes a lens group and at least one spacer element, the lens group includes first to seventh lenses arranged in sequence from the object side to the image side along the optical axis, wherein an air gap is formed between any two adjacent lenses; at least one aspherical lens is included among the first to seventh lenses; the number of lenses with optical focal length in the optical photography lens is seven; the at least one spacer element includes a fourth spacer element located between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens; the maximum thickness CP4 of the fourth spacer element and the air gap T45 on the optical axis between the fourth lens and the fifth lens satisfy the condition 3.85<CP4 / T45<19.6; the curvature radius R8 of the image side surface of the fourth lens and the inner diameter d4s of the object side surface of the fourth spacer element satisfy the condition -1.0<R8 / d4s<-0.4; the curvature radius R9 of the object side surface of the fifth lens and the inner diameter d4m of the image side surface of the fourth spacer element satisfy the condition 2.15<|R9 / d4m|<2.55. This configuration of the optical photography lens enables the lens to achieve the technical characteristics of high pixel resolution and low distortion. The ratio of the maximum thickness CP4 of the fourth spacer element to the air gap between the fourth and fifth lenses satisfies the aforementioned conditional equation of 3.85 < CP4 / T45 < 19.6. This means that the effective diameter edges of the fourth and fifth lenses span a large area, necessitating the placement of a thicker spacer element there for spacing. Furthermore, the angle of the field of view at this edge is steep, and when incident light at large angles enters, there is a certain risk of stray light reflected from the inner diameter slope of this spacer element. By simultaneously controlling the conditions of -1.0 < R8 / d4s < -0.4 and 2.15 < |R9 / d4m| < 2.55, this stray light can be effectively controlled and suppressed.

[0086] On the other hand, an optical photographic lens according to an embodiment of the present application includes a lens group and at least one spacer element, the lens group includes first to seventh lenses arranged in sequence from the object side to the image side along the optical axis, wherein there is an air gap between any two adjacent lenses; the first to seventh lenses include at least one aspherical lens; the number of lenses with optical focal length in the optical photographic lens is seven; the at least one spacer element includes a fourth spacer element located between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens, a first spacer element located between the first lens and the second lens and in contact with the image side surface of the first lens, and a second spacer element located between the second lens and the third lens and in contact with the image side surface of the second lens; the curvature radius R3 of the object side surface of the second lens, the outer diameter D2s of the object side surface of the second spacer element, and the outer diameter D1m of the image side surface of the first spacer element satisfy the condition 7.3<R3 / (D2s-D1m)<15.4. Through this setting of the optical photography lens, the lens can achieve the technical characteristics of high pixels and small distortion; the non-imaging light entering / emitted from the second lens can be directly controlled, and the inner aperture of the spacer element before and after the second lens can intercept the transmitted stray light and internal reflected stray light of the second lens, thereby improving the glare level of the entire lens and improving the cleanliness of the image.

[0087] On the other hand, according to an embodiment of the present application, an optical photographic lens includes a lens group and at least one spacer element, the lens group includes first to seventh lenses arranged in sequence from the object side to the image side along the optical axis, wherein there is an air gap between any two adjacent lenses; the first to seventh lenses include at least one aspherical lens; the number of lenses with optical power in the optical photographic lens is seven; the at least one spacer element includes a fourth spacer element located between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens, a second spacer element located between the second lens and the third lens and in contact with the image side surface of the second lens, and a third spacer element located between the third lens and the fourth lens and in contact with the image side surface of the third lens; the effective focal length f3 of the third lens, the center thickness CT3 of the third lens on the optical axis, the maximum thickness CP2 of the second spacer element, and the maximum thickness CP3 of the third spacer element satisfy the conditional formula -39.1<f3 / (CT3+CP2+CP3)≤-11.0. Through this setting of the optical photography lens, the lens can achieve the technical characteristics of high pixels and small distortion; the focal length of the third lens can be effectively controlled, and the thickness of the second spacer element, the third spacer element and the middle-thickness distribution of the third lens can be regulated, effectively ensuring that the thickness of the second spacer element and the third spacer element is at an appropriate level, enhancing assembly stability and improving the yield of the assembly manufacturing process.

[0088] On the other hand, according to an embodiment of the present application, an optical photographic lens includes a lens group and at least one spacer element, the lens group includes first to seventh lenses arranged in sequence from the object side to the image side along the optical axis, wherein an air gap is present between any two adjacent lenses; at least one aspherical lens is included among the first to seventh lenses; the number of lenses having optical power in the optical photographic lens is seven; the at least one spacer element includes a fourth spacer element located between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens, a fifth spacer element located between the fifth lens and the sixth lens and in contact with the image side surface of the fifth lens, and a sixth spacer element located between the sixth lens and the seventh lens and in contact with the image side surface of the sixth lens; the air gap T67 on the optical axis between the sixth lens and the seventh lens, the distance EP56 on the optical axis from the image side surface of the fifth spacer element to the object side surface of the sixth spacer element, and the center thickness CT7 on the optical axis of the seventh lens satisfy the condition 4.1<T67 / EP56+T67 / CT7<6.3. This configuration of the optical photography lens enables the lens to achieve the technical characteristics of high pixel density and minimal distortion. It also allows for effective control of the edge thickness of the sixth lens and the center thickness of the seventh lens, thereby ensuring the molding stability of the last two lenses and the stability of data such as lens surface eccentricity, thereby contributing to improved MTF performance yield.

[0089] However, those skilled in the art will appreciate that, without departing from the claimed technical solutions of this application, the number of lenses comprising the optical photography lens and the number of spacer elements may be varied to achieve the various results and advantages described herein, and this application does not impose specific limitations thereon. For example, while the embodiments describe seven lenses as an example, the optical photography lens is not limited to seven lenses. If desired, the optical photography lens may include another number of lenses. For another example, as needed, the optical photography lens may include another number of spacer elements than that described in the above embodiments.

[0090] Specific embodiments of the optical photography lens applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0091] Example 1

[0092] The following reference Figure 2 An optical photographic lens according to Example 1 of the present application will be described.

[0093] like Figure 2 As shown, in this embodiment, the optical photography lens includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7 housed in the lens barrel P0 and arranged in sequence from the object side to the image side along the optical axis.

[0094] In this embodiment, the optical photography lens further includes a plurality of spacers: a first spacer P1, located between the first lens E1 and the second lens E2, and in direct contact with the image-side surface of the first lens E1; a second spacer P2, located between the second lens E2 and the third lens E3, and in direct contact with the image-side surface of the second lens E2; a third spacer P3, located between the third lens E3 and the fourth lens E4, and in direct contact with the image-side surface of the third lens E3; a fourth spacer P4, located between the fourth lens E4 and the fifth lens E5, and in direct contact with the image-side surface of the fourth lens E4; a fifth spacer P5, located between the fifth lens E5 and the sixth lens E6, and in direct contact with the image-side surface of the fifth lens E5; and a sixth spacer P6, located between the sixth lens E6 and the seventh lens E7, and in direct contact with the image-side surface of the sixth lens E6.

[0095] In this embodiment, the first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has positive optical power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being convex.

[0096] In this embodiment, the aperture stop STO may be located between the first lens element E1 and the second lens element E2. In this embodiment, the optical photography lens may further include, for example, a filter (not shown) located on the image side of the seventh lens element E7, having an object-side surface S15 and an image-side surface S16, and an imaging surface S17 (not shown) located on the image side of the filter. Light from an object may, for example, sequentially pass through each of the surfaces S1 to S16 and ultimately be imaged on the imaging surface S17.

[0097] Table 1 shows the basic parameters of the optical photography lens of Example 1, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0098]

[0099]

[0100] Table 1

[0101] In this embodiment, the object-side surface and the image-side surface of any lens among the first lens E1 to the seventh lens E7 are both aspherical surfaces. The surface shape of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0102]

[0103] Wherein, x is the distance vector height of the aspheric surface from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. The following Tables 2-1 and 2-2 give the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75, A80, A81, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A31, A41, A59, A61, A71, A8 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 and A 30 .

[0104] Face number A4 A6 A8 A10 A12 A14 A16 S1 6.58E-01 -1.26E-01 1.34E-02 3.57E-03 -3.92E-03 1.04E-04 1.60E-03 S2 3.80E-01 -1.03E-01 1.70E-02 4.70E-03 -5.00E-03 2.64E-05 1.66E-03 S3 -2.71E-01 -2.84E-04 1.04E-02 8.15E-04 -3.23E-04 1.31E-03 6.62E-04 S4 -7.39E-01 6.90E-02 -2.64E-03 7.67E-03 6.44E-03 1.67E-03 -1.02E-03 S5 7.47E-01 1.46E-01 2.03E-02 3.19E-02 1.48E-02 1.38E-02 4.58E-03 S6 4.60E-01 -5.19E-03 -2.39E-02 2.45E-02 -1.21E-02 3.76E-03 -1.18E-03 S7 -6.95E-01 2.37E-01 -6.77E-02 -4.91E-03 2.20E-03 -1.08E-03 -2.59E-03 S8 -2.31E-01 -7.01E-02 1.40E-01 -1.05E-02 -3.34E-02 9.92E-03 8.07E-03 S9 2.98E-01 7.65E-02 -1.58E-01 -3.27E-02 3.03E-02 3.01E-02 -3.21E-03 S10 -5.39E-01 -1.39E-01 1.90E-01 -4.05E-02 -4.91E-02 1.15E-02 1.86E-02 S11 2.63E-01 2.74E-01 2.21E-01 -8.50E-02 -1.60E-02 -6.19E-02 3.85E-02 S12 5.28E-01 1.29E-01 5.08E-02 -3.77E-02 4.61E-02 -7.05E-02 2.04E-02 S13 -7.24E-03 1.01E+00 9.23E-01 3.08E-01 -9.14E-02 3.86E-02 6.88E-02 S14 2.17E+00 1.86E+00 5.69E-01 -4.18E-02 1.21E-01 3.46E-01 4.52E-02

[0105] Table 2-1

[0106]

[0107]

[0108] Table 2-2

[0109] Referring to Table 7, the values ​​of the various parameters related to the lens barrel and the spacer elements in this embodiment are shown in the 'Example 1' column of Table 7. Specific descriptions of the various parameters shown in Table 7 are as follows:

[0110] d1s is the inner diameter of the object-side surface of the first spacing element P1, D1s is the outer diameter of the object-side surface of the first spacing element P1, D1m is the outer diameter of the image-side surface of the first spacing element P1, D2s is the outer diameter of the object-side surface of the second spacing element P2, d3m is the inner diameter of the image-side surface of the third spacing element P3, d4s is the inner diameter of the object-side surface of the fourth spacing element P4, D4s is the outer diameter of the object-side surface of the fourth spacing element P4, d5s is the inner diameter of the object-side surface of the fifth spacing element P5, d5m is the inner diameter of the image-side surface of the fifth spacing element P5, D5m is the outer diameter of the image-side surface of the fifth spacing element P5, d6m is the inner diameter of the image-side surface of the sixth spacing element P6, D6m is the outer diameter of the image-side surface of the sixth spacing element P6, CP2 is the second The maximum thickness of the spacer element P2 along the optical axis, CP3 is the maximum thickness of the third spacer element P3 along the optical axis, CP4 is the maximum thickness of the fourth spacer element P4 along the optical axis, CP5 is the maximum thickness of the fifth spacer element P5 along the optical axis, EP01 is the distance on the optical axis from the object side end face of the lens barrel P0 to the object side face of the first spacer element P1, EP34 is the distance on the optical axis from the image side face of the third spacer element P3 to the object side face of the fourth spacer element P4, EP45 is the distance on the optical axis from the image side face of the fourth spacer element P4 to the object side face of the fifth spacer element P5, and EP56 is the distance on the optical axis from the image side face of the fifth spacer element P5 to the object side face of the sixth spacer element P6. The units of the above-mentioned parameters shown in Table 7 are all millimeters (mm). The above-mentioned parameters can be shown in the structural diagram of the optical photographic lens as follows: Figure 1 shown.

[0111] Example 2

[0112] The following reference Figure 3 An optical photographic lens according to Example 2 of the present application will be described.

[0113] like Figure 3As shown, in this embodiment, similar to Example 1, the optical photography lens also includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7 accommodated in the lens barrel P0 and arranged in sequence from the object side to the image side along the optical axis. The optical photography lens further includes a plurality of spacers: a first spacer P1 located between the first lens E1 and the second lens E2 and in direct contact with the image-side surface of the first lens E1; a second spacer P2 located between the second lens E2 and the third lens E3 and in direct contact with the image-side surface of the second lens E2; a third spacer P3 located between the third lens E3 and the fourth lens E4 and in direct contact with the image-side surface of the third lens E3; a fourth spacer P4 located between the fourth lens E4 and the fifth lens E5 and in direct contact with the image-side surface of the fourth lens E4; a fifth spacer P5 located between the fifth lens E5 and the sixth lens E6 and in direct contact with the image-side surface of the fifth lens E5; and a sixth spacer P6 located between the sixth lens E6 and the seventh lens E7 and in direct contact with the image-side surface of the sixth lens E6.

[0114] In addition, the basic parameter table of the optical photographic lens of this embodiment is the same as Table 1 in Example 1, and the high-order coefficient table of the aspherical mirror surface is the same as Table 2-1 and Table 2-2 in Example 1.

[0115] The values ​​of the relevant parameters of the optical photography lens of this embodiment are shown in the "Example 2" column of Table 7. The specific description of the meaning of each parameter is the same as that of Example 1 above and will not be repeated here.

[0116] Figure 4 The axial chromatic aberration curves of the optical photography lenses of Examples 1 and 2 are shown, which indicate the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 5 Astigmatism curves of the optical photographic lenses of Examples 1 and 2 are shown, which indicate meridional field curvature and sagittal field curvature. Figure 6 The distortion curves of the optical photography lenses of Example 1 and Example 2 are shown, which represent the distortion values ​​corresponding to different field angles. Figure 7 The chromatic aberration curves of the optical photographic lenses of Example 1 and Example 2 are shown, which represent the deviation of the different image heights on the imaging surface after the light passes through the lens. Figures 4 to 7 It can be seen that the optical photography lenses provided in Examples 1 and 2 can achieve good imaging quality.

[0117] Example 3

[0118] The following reference Figure 8 An optical photographic lens according to Example 3 of the present application will be described.

[0119] like Figure 8 As shown, in this embodiment, the optical photography lens includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7 housed in the lens barrel P0 and arranged in sequence from the object side to the image side along the optical axis.

[0120] In this embodiment, the optical photography lens further includes a plurality of spacers: a first spacer P1 located between the first lens E1 and the second lens E2 and in direct contact with the image-side surface of the first lens E1; a second spacer P2 located between the second lens E2 and the third lens E3 and in direct contact with the image-side surface of the second lens E2; a third spacer P3 located between the third lens E3 and the fourth lens E4 and in direct contact with the image-side surface of the third lens E3; a fourth spacer P4 located between the fourth lens E4 and the fifth lens E5 and in direct contact with the image-side surface of the fourth lens E4; a fifth spacer P5 located between the fifth lens E5 and the sixth lens E6 and in direct contact with the image-side surface of the fifth lens E5; and a sixth spacer P6 located between the sixth lens E6 and the seventh lens E7 and in direct contact with the image-side surface of the sixth lens E6.

[0121] In this embodiment, the first lens E1 has positive focal power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has positive focal power, with its object-side surface S3 being convex and its image-side surface S4 being convex. The third lens E3 has negative focal power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive focal power, with its object-side surface S7 being concave and its image-side surface S8 being convex. The fifth lens E5 has positive focal power, with its object-side surface S9 being concave and its image-side surface S10 being convex. The sixth lens E6 has negative focal power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative focal power, with its object-side surface S13 being convex and its image-side surface S14 being concave.

[0122] In this embodiment, the aperture stop STO may be located between the object side and the first lens element E1. In this embodiment, the optical photography lens may further include, for example, a filter (not shown) located on the image side of the seventh lens element E7, having an object-side surface S15 and an image-side surface S16, and an imaging surface S17 (not shown) located on the image side of the filter. Light from an object may, for example, sequentially pass through each of the surfaces S1 to S16 and ultimately be imaged on the imaging surface S17.

[0123] Table 3 shows the basic parameters of the optical photographic lens of Example 3, where the units of curvature radius and thickness / distance are all in millimeters (mm).

[0124]

[0125]

[0126] Table 3

[0127] In this embodiment, the object side surface and the image side surface of any lens among the first lens E1 to the seventh lens E7 are aspherical surfaces. The surface shape of each aspherical surface can be defined by the formula (1) given in the above embodiment 1. Tables 4-1 and 4-2 show the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 and A 30 .

[0128] Face number A4 A6 A8 A10 A12 A14 A16 S1 -5.76E-02 -4.68E-03 -4.56E-04 -3.38E-05 6.12E-07 3.21E-06 1.69E-06 S2 -1.16E-01 -4.57E-03 -4.23E-05 4.17E-05 -7.02E-06 6.14E-06 -2.21E-06 S3 -2.56E-01 -2.67E-03 5.21E-03 7.86E-04 -1.36E-04 -3.41E-05 1.38E-05 S4 -3.44E-01 2.56E-02 4.36E-03 9.37E-04 -1.12E-03 1.85E-04 2.85E-04 S5 -2.25E-01 3.85E-02 -1.25E-02 4.09E-03 -1.73E-03 6.95E-04 5.78E-05 S6 -4.18E-01 8.77E-02 -1.80E-02 8.84E-03 -4.14E-03 2.67E-03 -1.42E-03 S7 -7.80E-02 7.45E-02 -1.23E-02 -8.10E-04 -4.38E-04 2.57E-03 -2.39E-03 S8 6.26E-01 -1.29E-01 2.90E-02 -1.41E-02 8.12E-03 -2.31E-03 8.12E-04 S9 2.08E-01 -1.32E-01 2.61E-02 -1.58E-02 7.91E-03 -4.23E-03 9.40E-04 S10 -6.27E-03 5.13E-02 1.80E-02 -1.12E-02 1.43E-04 6.09E-04 -2.25E-04 S11 2.52E-02 -1.67E-01 8.65E-02 -4.40E-02 2.06E-02 -5.50E-03 5.98E-04 S12 -1.37E+00 2.67E-01 -5.08E-02 -1.54E-02 1.60E-02 -4.71E-03 -3.57E-03 S13 -2.98E+00 1.08E+00 -1.82E-01 -9.13E-02 7.28E-02 -3.92E-02 2.82E-02 S14 -5.84E+00 1.02E+00 -2.20E-01 -4.42E-02 5.46E-02 -5.91E-02 4.23E-02

[0129] Table 4-1

[0130] Face number A18 A20 A22 A24 A26 A28 A30 S1 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S2 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 S3 1.21E-05 -1.87E-05 6.42E-07 3.19E-07 3.73E-06 -3.06E-06 8.00E-07 S4 1.33E-05 -2.11E-04 -3.06E-05 5.92E-05 1.92E-05 -9.37E-06 -4.32E-06 S5 7.59E-05 -2.41E-04 3.48E-06 6.68E-05 1.42E-05 -1.85E-05 -2.65E-06 S6 3.69E-04 -1.72E-05 1.34E-04 -8.89E-06 -5.21E-05 7.89E-06 2.28E-06 S7 5.32E-04 4.30E-04 -6.21E-05 -3.32E-05 -6.13E-05 5.86E-05 -1.08E-05 S8 -1.32E-03 2.44E-04 8.58E-05 1.96E-04 -8.32E-05 6.06E-05 -1.16E-05 S9 -1.46E-04 -2.90E-04 5.41E-04 -1.38E-04 -2.81E-04 -5.50E-05 -1.94E-05 S10 3.41E-04 -1.62E-04 1.84E-04 1.01E-04 -3.52E-04 5.85E-05 1.84E-04 S11 -4.15E-03 2.72E-03 -2.12E-03 1.22E-03 -9.00E-04 6.76E-04 -4.13E-05 S12 -1.17E-03 2.98E-03 -2.63E-03 1.48E-03 -9.92E-04 1.15E-03 -5.98E-04 S13 -2.65E-02 1.44E-02 -8.45E-03 3.51E-03 -6.79E-04 -2.05E-03 1.13E-03 S14 -3.80E-02 2.66E-02 -2.09E-02 1.14E-02 -4.93E-03 2.40E-03 -9.69E-04

[0131] Table 4-2

[0132] Referring to Table 7, the values ​​of the various relevant parameters of the optical photographic lens of this embodiment are shown in the 'Example 3' column of Table 7. The specific description of the meaning represented by each parameter is the same as that in the above-mentioned Example 1 and will not be repeated here.

[0133] Example 4

[0134] The following reference Figure 9 An optical photographic lens according to Example 4 of the present application will be described.

[0135] like Figure 9As shown, in this embodiment, similar to Example 3, the optical photography lens also includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7 accommodated in the lens barrel P0 and arranged in sequence from the object side to the image side along the optical axis. The optical photography lens further includes a plurality of spacers: a first spacer P1 located between the first lens E1 and the second lens E2 and in direct contact with the image-side surface of the first lens E1; a second spacer P2 located between the second lens E2 and the third lens E3 and in direct contact with the image-side surface of the second lens E2; a third spacer P3 located between the third lens E3 and the fourth lens E4 and in direct contact with the image-side surface of the third lens E3; a fourth spacer P4 located between the fourth lens E4 and the fifth lens E5 and in direct contact with the image-side surface of the fourth lens E4; a fifth spacer P5 located between the fifth lens E5 and the sixth lens E6 and in direct contact with the image-side surface of the fifth lens E5; and a sixth spacer P6 located between the sixth lens E6 and the seventh lens E7 and in direct contact with the image-side surface of the sixth lens E6.

[0136] In addition, the basic parameter table of the optical photography lens of this embodiment is the same as Table 3 in Example 3, and the high-order coefficient table of the aspherical mirror surface is the same as Table 4-1 and Table 4-2 in Example 3.

[0137] The values ​​of the relevant parameters of the optical photography lens of this embodiment are shown in the "Example 4" column of Table 7. The specific description of the meaning of each parameter is the same as that of Example 1 above and will not be repeated here.

[0138] Figure 10 The axial chromatic aberration curves of the optical photography lenses of Examples 3 and 4 are shown, which indicate the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 11 Astigmatism curves of the optical photographic lenses of Examples 3 and 4 are shown, which indicate meridional field curvature and sagittal field curvature. Figure 12 The distortion curves of the optical photography lenses of Examples 3 and 4 are shown, which represent the distortion values ​​corresponding to different field angles. Figure 13 The magnification chromatic aberration curves of Example 3 and Example 4 are shown, which represent the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 10 to 13 It can be seen that the optical photography lenses provided in Examples 3 and 4 can achieve good imaging quality.

[0139] Example 5

[0140] The following reference Figure 14 An optical photographic lens according to Example 5 of the present application will be described.

[0141] like Figure 14 As shown, in this embodiment, the optical photography lens includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7 housed in the lens barrel P0 and arranged in sequence from the object side to the image side along the optical axis.

[0142] In this embodiment, the optical photography lens further includes a plurality of spacers: a first spacer P1 located between the first lens E1 and the second lens E2 and in direct contact with the image-side surface of the first lens E1; a second spacer P2 located between the second lens E2 and the third lens E3 and in direct contact with the image-side surface of the second lens E2; a third spacer P3 located between the third lens E3 and the fourth lens E4 and in direct contact with the image-side surface of the third lens E3; a fourth spacer P4 located between the fourth lens E4 and the fifth lens E5 and in direct contact with the image-side surface of the fourth lens E4; a fifth spacer P5 located between the fifth lens E5 and the sixth lens E6 and in direct contact with the image-side surface of the fifth lens E5; and a sixth spacer P6 located between the sixth lens E6 and the seventh lens E7 and in direct contact with the image-side surface of the sixth lens E6.

[0143] In this embodiment, the first lens E1 has negative optical power, with its object-side surface S1 being concave and its image-side surface S2 being convex. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being convex. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has negative optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being convex.

[0144] In this embodiment, the aperture stop STO may be located between the second lens element E2 and the third lens element E3. In this embodiment, the optical photography lens system may further include, for example, a filter (not shown) located on the image side of the seventh lens element E7, having an object-side surface S15 and an image-side surface S16, and an imaging surface S17 (not shown) located on the image side of the filter. Light from an object may, for example, sequentially pass through the surfaces S1 to S16 and ultimately be imaged on the imaging surface S17.

[0145] Table 5 shows the basic parameters of the optical photography lens of Example 5, where the units of curvature radius and thickness / distance are all millimeters (mm).

[0146]

[0147] Table 5

[0148] In this embodiment, the object side surface and the image side surface of any lens among the first lens E1 to the seventh lens E7 are aspherical surfaces. The surface shape of each aspherical surface can be defined by the formula (1) given in the above embodiment 1. Tables 6-1 and 6-2 show the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A 10 、A 12 、A 14 、A 16 、A 18 、A 20 、A 22 、A 24 、A 26 、A 28 、A 30 .

[0149] Face number A4 A6 A8 A10 A12 A14 A16 S1 1.10E+00 -1.40E-01 2.90E-02 -1.03E-02 1.24E-03 -5.50E-04 3.74E-04 S2 5.61E-01 -1.07E-01 2.02E-02 -4.86E-03 8.53E-04 1.04E-04 3.35E-04 S3 -1.25E-01 -3.62E-03 9.52E-03 3.27E-04 -5.22E-04 -1.02E-03 -4.19E-04 S4 -7.17E-02 1.70E-02 4.39E-04 -3.72E-03 5.47E-04 1.57E-03 2.70E-05 S5 -3.98E-01 3.21E-02 1.85E-02 -2.36E-03 -2.42E-03 -4.63E-04 5.61E-04 S6 -7.78E-01 1.65E-01 -3.05E-02 2.84E-03 4.49E-03 3.09E-04 2.00E-04 S7 -1.80E-01 6.08E-02 -5.16E-02 3.19E-02 -1.40E-02 4.85E-03 -1.12E-03 S8 -6.64E-01 2.49E-01 -4.08E-02 -5.22E-03 -1.38E-02 6.09E-03 2.38E-03 S9 9.12E-01 -3.54E-01 1.69E-01 -4.01E-02 8.18E-04 1.19E-03 5.43E-03 S10 6.35E+00 -1.10E+00 2.43E-01 -5.83E-02 2.84E-02 -3.71E-02 3.01E-02 S11 -6.16E+00 1.55E+00 -4.87E-01 1.71E-01 -6.85E-02 2.52E-02 -7.05E-03 S12 -5.68E+00 1.22E+00 -4.89E-01 2.81E-01 -1.47E-01 4.22E-02 6.75E-03 S13 9.31E-01 -2.10E-01 2.17E-01 -1.38E-01 3.58E-02 -2.69E-02 1.54E-02 S14 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00

[0150] Table 6-1

[0151]

[0152]

[0153] Table 6-2

[0154] Referring to Table 7, the values ​​of the various relevant parameters of the optical photographic lens of this embodiment are shown in the 'Example 5' column of Table 7. The specific description of the meaning represented by each parameter is the same as that in the above Example 1 and will not be repeated here.

[0155] Example 6

[0156] The following reference Figure 15 An optical photographic lens according to Example 6 of the present application will be described.

[0157] like Figure 15As shown, in this embodiment, similar to Example 5, the optical photography lens also includes a lens barrel P0 and a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6 and a seventh lens E7 accommodated in the lens barrel P0 and arranged in sequence from the object side to the image side along the optical axis. The optical photography lens further includes a plurality of spacer elements: a first spacer element P1, located between the first lens E1 and the second lens E2 and in direct contact with the image-side surface of the first lens E1; a second spacer element P2, located between the second lens E2 and the third lens E3 and in direct contact with the image-side surface of the second lens E2; a third spacer element P3, located between the third lens E3 and the fourth lens E4 and in direct contact with the image-side surface of the third lens E3; a fourth spacer element P4, located between the fourth lens E4 and the fifth lens E5 and in direct contact with the image-side surface of the fourth lens E4; a fifth spacer element P5, located between the fifth lens E5 and the sixth lens E6 and in direct contact with the image-side surface of the fifth lens E5; and a sixth spacer element P6, located between the sixth lens E6 and the seventh lens E7 and in direct contact with the image-side surface of the sixth lens E6.

[0158] In addition, the basic parameter table of the optical photographic lens of this embodiment is the same as Table 5 in Example 5, and the high-order coefficient table of the aspherical mirror surface is the same as Table 6-1 and Table 6-2 in Example 5.

[0159] The values ​​of the relevant parameters of the optical photography lens of this embodiment are shown in the "Example 6" column of Table 7. The specific description of the meaning of each parameter is the same as that of Example 1 above and will not be repeated here.

[0160] Figure 16 The axial chromatic aberration curves of the optical photography lenses of Examples 5 and 6 are shown, which indicate the deviation of the convergent focus of light of different wavelengths passing through the lens. Figure 17 Astigmatism curves of the optical photographic lenses of Examples 5 and 6 are shown, which indicate meridional field curvature and sagittal field curvature. Figure 18 The distortion curves of the optical photography lenses of Examples 5 and 6 are shown, which represent the distortion values ​​corresponding to different field angles. Figure 19 The magnification chromatic aberration curves of Example 5 and Example 6 are shown, which represent the deviation of different image heights on the imaging surface after the light passes through the lens. Figures 16 to 19 It can be seen that the optical photography lenses provided in Examples 5 and 6 can achieve good imaging quality.

[0161]

[0162]

[0163] Table 7

[0164] In addition, in Examples 1 to 6, the effective focal lengths f1 to f7 of the first to seventh lenses are respectively as shown in Table 8 below.

[0165] Parameters / Example Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 f1(mm) -147.32 -147.32 13.63 13.63 -28.06 -28.06 f2(mm) 22.08 22.08 11.87 11.87 -503.98 -503.98 f3(mm) -10.01 -10.01 -6.39 -6.39 -15.13 -15.13 f4(mm) 4.63 4.63 5.38 5.38 6.67 6.67 f5(mm) 10.11 10.11 123.60 123.60 3.96 3.96 f6(mm) -11.78 -11.78 -31.57 -31.57 -7.02 -7.02 f7(mm) -33.46 -33.46 -15.77 -15.77 -12.30 -12.30

[0166] Table 8 Examples 1 to 6 respectively meet the conditions shown in Table 9 below.

[0167] Conditional formula / Example Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 CT2 / (T23+CP2) 2.23 2.23 4.40 4.36 1.13 1.13 |R1×N1| / d1s 6.44 6.24 2.88 2.80 1.53 1.46 (EP01-CT1) / (CT1+T12) 0.39 0.39 0.10 0.10 0.39 0.36 |R2 / D1s| 2.12 2.04 4.25 3.82 1.07 1.07 R3 / (D2s-D1m) 14.13 14.13 7.33 7.33 15.35 15.35 f3 / (CT3+CP2+CP3) -29.09 -29.09 -11.14 -11.10 -39.05 -39.05 |R7 / R6|×(d4s / d3m) 2.31 2.39 1.37 1.38 1.67 1.66 CT4 / (EP34+CP4) 0.79 0.77 1.01 1.01 0.72 0.72 CP4 / T45 4.05 3.88 12.49 11.91 19.59 18.98 R8 / d4s -0.71 -0.67 -0.44 -0.43 -0.98 -0.97 |R9 / d4m| 2.54 2.38 2.22 2.17 2.41 2.38 (EP45+CP5) / CT5 1.61 1.55 2.24 2.24 0.84 0.84 R11 / |d5s-d5m| 11.53 6.17 5.85 6.39 8.24 8.70 R12 / D5m 0.50 0.49 0.55 0.54 0.27 0.27 T67 / EP56+T67 / CT7 4.17 4.11 6.23 6.23 5.29 5.25 f6 / f7 0.35 0.35 2.00 2.00 0.57 0.57 |R13 / d6m| 0.68 0.67 0.55 0.55 0.49 0.48

[0168] Table 9

[0169] The present application also provides an imaging device, which is provided with an electronic photosensitive element for imaging. The electronic photosensitive element can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical photographic lens described above.

[0170] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of protection provided in this application is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the concept of this application. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical photographic lens, characterized in that: comprising a lens group and at least one spacer element, The lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence from the object side to the image side along the optical axis; There is an air gap between any two adjacent lenses from the first lens to the seventh lens; The first lens to the seventh lens include at least one aspherical lens; The number of lenses having optical power in the optical photography lens is seven; The at least one spacer element includes: a fourth spacer element located between the fourth lens and the fifth lens and in contact with the image-side surface of the fourth lens; The optical photography lens meets the following requirements: 3.85<CP4 / T45<19.6; -1.0<R8 / d4s<-0.4; and 2.15<|R9 / d4m|<2.55, Among them, CP4 is the maximum thickness of the fourth spacer element, T45 is the air gap between the fourth lens and the fifth lens on the optical axis, R8 is the curvature radius of the image side surface of the fourth lens, d4s is the inner diameter of the object side surface of the fourth spacer element, R9 is the curvature radius of the object side surface of the fifth lens, and d4m is the inner diameter of the image side surface of the fourth spacer element.

2. The optical photographic lens according to claim 1, wherein: The at least one spacer element further includes: a second spacer element located between the second lens and the third lens and in contact with the image-side surface of the second lens; The center thickness CT2 of the second lens on the optical axis, the air gap T23 between the second lens and the third lens on the optical axis, and the maximum thickness CP2 of the second spacer element satisfy: 1.1<CT2 / (T23+CP2)≤4.

4.

3. The optical photographic lens according to claim 1, wherein: The at least one spacer element further includes: a first spacer element located between the first lens and the second lens and in contact with the image-side surface of the first lens; The curvature radius R1 of the object-side surface of the first lens, the refractive index N1 of the first lens, and the inner diameter d1s of the object-side surface of the first spacer element satisfy: 1.4<|R1×N1| / d1s<6.

5.

4. The optical photographic lens according to claim 1, wherein: The optical photography lens further comprises a lens barrel, wherein the lens group and the at least one spacer element are assembled in the lens barrel; And, the at least one spacer element further includes: a first spacer element located between the first lens and the second lens and in contact with the image-side surface of the first lens; The distance EP01 from the object-side end face of the lens barrel to the object-side face of the first spacer element on the optical axis, the center thickness CT1 of the first lens on the optical axis, and the air gap T12 between the first lens and the second lens on the optical axis satisfy the following conditions: 0.1≤(EP01-CT1) / (CT1+T12)≤0.

4.

5. The optical photographic lens according to claim 1, wherein: The at least one spacer element further includes: a first spacer element located between the first lens and the second lens and in contact with the image-side surface of the first lens; The curvature radius R2 of the image-side surface of the first lens and the outer diameter D1s of the object-side surface of the first spacer element satisfy: 1.05<|R2 / D1s|<4.

3.

6. The optical photographic lens according to claim 1, wherein: The at least one spacer element further includes: a first spacer element located between the first lens and the second lens and in contact with the image side surface of the first lens; and a second spacer element located between the second lens and the third lens and in contact with the image side surface of the second lens; The curvature radius R3 of the object-side surface of the second lens, the outer diameter D2s of the object-side surface of the second spacer element, and the outer diameter D1m of the image-side surface of the first spacer element satisfy: 7.3<R3 / (D2s-D1m)<15.

4.

7. The optical photographic lens according to claim 1, wherein: The at least one spacer element further includes: a second spacer element located between the second lens and the third lens and in contact with the image side surface of the second lens; and a third spacer element located between the third lens and the fourth lens and in contact with the image side surface of the third lens; The effective focal length f3 of the third lens, the center thickness CT3 of the third lens on the optical axis, the maximum thickness CP2 of the second spacer element and the maximum thickness CP3 of the third spacer element satisfy the following conditions: -39.1<f3 / (CT3+CP2+CP3)≤-11.

0.

8. The optical photographic lens according to claim 1, wherein: The first lens has positive or negative optical power; The second lens has positive or negative optical power, and its object side surface is convex; The third lens has negative optical power and its object side surface is concave; The fourth lens has positive refractive power and its image side surface is convex; The fifth lens has positive refractive power and its image side surface is convex; The sixth lens has negative optical power, its object-side surface is convex, and its image-side surface is concave; and The seventh lens has negative refractive power.

9. The optical photographic lens according to any one of claims 1 to 8, wherein: The at least one spacer element further includes: a third spacer element located between the third lens and the fourth lens and in contact with the image side surface of the third lens; and a fourth spacer element located between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens; The curvature radius R7 of the object-side surface of the fourth lens, the curvature radius R6 of the image-side surface of the third lens, the inner diameter d4s of the object-side surface of the fourth spacer element, and the inner diameter d3m of the image-side surface of the third spacer element satisfy: 1.35<|R7 / R6|×(d4s / d3m)≤2.

4.

10. The optical photographic lens according to any one of claims 1 to 8, wherein: The at least one spacer element further includes: a third spacer element located between the third lens and the fourth lens and in contact with the image side surface of the third lens; and a fourth spacer element located between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens; The center thickness CT4 of the fourth lens on the optical axis, the distance EP34 from the image side surface of the third spacer element to the object side surface of the fourth spacer element on the optical axis, and the maximum thickness CP4 of the fourth spacer element satisfy: 0.7<CT4 / (EP34+CP4)<1.

05.

11. The optical photographic lens according to any one of claims 1 to 8, wherein: The at least one spacer element further includes: a fourth spacer element located between the fourth lens and the fifth lens and in contact with the image side surface of the fourth lens; and a fifth spacer element located between the fifth lens and the sixth lens and in contact with the image side surface of the fifth lens; The distance EP45 from the image side surface of the fourth spacer element to the object side surface of the fifth spacer element on the optical axis, the maximum thickness CP5 of the fifth spacer element, and the center thickness CT5 of the fifth lens on the optical axis satisfy: 0.8<(EP45+CP5) / CT5<2.

3.

12. The optical photographic lens according to any one of claims 1 to 8, wherein: The at least one spacer element further includes: a fifth spacer element located between the fifth lens and the sixth lens and in contact with the image-side surface of the fifth lens; The curvature radius R11 of the object-side surface of the sixth lens, the inner diameter d5s of the object-side surface of the fifth spacer element, and the inner diameter d5m of the image-side surface of the fifth spacer element satisfy: 5.8<R11 / |d5s-d5m|<11.

6.

13. The optical photographic lens according to any one of claims 1 to 8, wherein: The at least one spacer element further includes: a fifth spacer element located between the fifth lens and the sixth lens and in contact with the image-side surface of the fifth lens; The curvature radius R12 of the image side surface of the sixth lens and the outer diameter D5m of the image side surface of the fifth spacer element satisfy: 0.25<R12 / D5m<0.

6.

14. The optical photographic lens according to any one of claims 1 to 8, wherein: The at least one spacer element further includes: a fifth spacer element located between the fifth lens and the sixth lens and in contact with the image side surface of the fifth lens; and a sixth spacer element located between the sixth lens and the seventh lens and in contact with the image side surface of the sixth lens; The air gap T67 between the sixth lens and the seventh lens on the optical axis, the distance EP56 from the image side surface of the fifth spacer element to the object side surface of the sixth spacer element on the optical axis, and the center thickness CT7 of the seventh lens on the optical axis satisfy the following conditions: 4.1<T67 / EP56+T67 / CT7<6.

3.

15. The optical photography lens according to any one of claims 1 to 8, wherein: The effective focal length f6 of the sixth lens and the effective focal length f7 of the seventh lens satisfy: 0.33<f6 / f7≤2.

0.

16. The optical photographic lens according to any one of claims 1 to 8, wherein: The at least one spacer element further includes: a sixth spacer element located between the sixth lens and the seventh lens and in contact with the image-side surface of the sixth lens; The curvature radius R13 of the object-side surface of the seventh lens and the inner diameter d6m of the image-side surface of the sixth spacer element satisfy: 0.45<|R13 / d6m|≤0.

7.

17. The optical photographic lens according to any one of claims 1 to 8, wherein: The at least one spacer element further includes: a sixth spacer element located between the sixth lens and the seventh lens and in contact with the image-side surface of the sixth lens; The curvature radius R14 of the image-side surface of the seventh lens, the outer diameter D6m of the image-side surface of the sixth spacer element, and the inner diameter d6m of the image-side surface of the sixth spacer element satisfy: 1.14<|R14| / (D6m-d6m)≤1.85.

Images