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 shooting. Many products on the market, such as mobile phones, cameras, sports cameras, etc., can be used for such shooting needs. Although mobile phone shooting is convenient, the image quality, anti-shake performance and functionality are not as good as professional handheld shooting equipment, such as micro-single cameras, etc., but such cameras are too large and have poor portability; handheld gimbal cameras have well solved the contradictions of the above products, with excellent image quality and a size that can be small enough to fit into a pocket. As the main medium for image capture, the main camera lens of the device must have high pixels, small distortion, excellent anti-glare performance and other main features to well realize the shooting functions people need. Summary of the invention

[0003] The present application provides an optical photographic 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 there is an air gap between any two adjacent lenses of 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 with optical power in the optical photographic 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 photographic lens satisfies the conditional formulas 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 element, T45 is the air space between the fourth lens and the fifth lens on the optical axis, R8 is the radius of curvature 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 radius of curvature 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.

[0004] 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. 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, at least one spacer element may also 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 photographic 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, 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 also 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 also 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 optical power or negative optical power; the second lens has positive optical power 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 also 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 also 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, at least one spacer element may also 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, at least one spacer element may also 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, 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, at least one spacer element may also 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, 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, 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 and 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; 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 between the fourth lens and the fifth lens on the optical axis satisfy the conditional formula 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 conditional formula -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 conditional formula 2.15<|R9 / d4m|<2.55. Through this setting of the optical photography lens, the lens can achieve the technical characteristics of high pixel and small distortion, wherein 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 formula 3.85<CP4 / T45<19.6, which means that the span of the effective diameter edge of the fourth and fifth lenses is large, and a thicker spacer element needs to be set here for spacing, and the angle of the edge field of view light here is steeper. When the incident light at a large angle is incident, there is a certain risk of stray light reflected by the inner diameter inclined surface of this spacer element. By simultaneously controlling to satisfy the conditional formulas -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 A schematic structural diagram of an optical photographic lens according to Embodiment 1 of the present application is shown;

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

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

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

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

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

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

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

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

[0032] Fig. 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] Fig.21 A schematic diagram showing the incident direction and the reflected direction of the light on the inner diameter inclined surface of the fourth spacing element when the optical photography lens according to an exemplary embodiment of the present application satisfies the conditional formula R8 / d4s=-0.2;

[0034] Fig. 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] Fig.23 A schematic diagram showing the incident direction and the reflected direction of the light on the inner diameter inclined surface of the fourth spacing element when the optical photography lens according to an exemplary embodiment of the present application satisfies the conditional formula R8 / d4s=-0.7;

[0036] Fig.24 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=-1.2; and

[0037] Fig.25A schematic diagram showing the incident direction and the reflected direction of light on the inner diameter slope of the fourth spacing element when the optical photography lens according to an exemplary embodiment of the present application satisfies the conditional expression R8 / d4s=-1.2. DETAILED DESCRIPTION

[0038] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only 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 expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0040] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples 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 type 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 radius of curvature of the paraxial area) is used to judge the concave and convex. 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. For the object side, when the R value is positive, it is judged as a convex surface, and when the R value is negative, it is judged as a concave surface; for the image side, when the R value is positive, it is judged as a concave surface, and when the R value is negative, it is judged as a convex surface.

[0042] The solutions described in the embodiments of the present application can be simulated by software / tools such as ZEMAX and CODE V. The solutions described in some embodiments can be simulated by CODE V. In the process of simulation using the above software / tools, the surface shape of the lens can be appropriately adjusted according to 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 exclude 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 listed 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 (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0045] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can also be made without departing from the concept of the present application, and these all belong to the protection scope 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] The 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-piece 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 lens to the seventh lens may be arranged in sequence from the object side to the image side along the optical axis.

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

[0049] In an exemplary embodiment, at least one aspherical lens may be included in the first to seventh lenses. Aspherical lenses have better curvature radius characteristics and have the advantages of improving distortion aberration and improving astigmatism aberration. The use of aspherical lenses can eliminate aberrations that occur during imaging as much as possible, thereby improving imaging 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 located 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 conditional formula 3.85<CP4 / T45<19.6, wherein CP4 is the maximum thickness of the fourth spacer element, and T45 is the air spacing between the fourth lens and the fifth lens on the optical axis. The maximum thickness of the fourth spacer element may be the maximum thickness of the fourth spacer element along the optical axis or in a direction parallel to the optical axis, and the air spacing between the fourth lens and the fifth lens on the optical axis may be the distance from the image side surface of the fourth lens to the object side surface of the fifth lens on the optical axis.

[0053] In an exemplary embodiment, the optical photography lens of the present application may satisfy the conditional formula -1.0<R8 / d4s<-0.4, wherein R8 is the curvature radius of the image side surface of the fourth lens, 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, wherein 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.

[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; 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 between the fourth lens and the fifth lens on the optical axis satisfy the conditional formula 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 conditional formula -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 conditional formula 2.15<|R9 / d4m|<2.55. Through this setting of the optical photography lens, the lens can achieve the technical characteristics of high pixel and small distortion, wherein 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 formula 3.85<CP4 / T45<19.6, which means that the span of the effective diameter edge of the fourth and fifth lenses is relatively large, and a thicker spacer element (i.e., the fourth spacer element) needs to be set here for spacing, and the angle of the edge field light here is relatively steep. When the incident light at a large angle is incident, there is a certain risk of stray light reflected by the inner diameter inclined surface of the fourth spacer element. By simultaneously controlling to satisfy the conditional formulas -1.0<R8 / d4s<-0.4 and 2.15<|R9 / d4m|<2.55, this stray light can be effectively controlled and suppressed.

[0056] Fig. 20 and Fig.21 The figure shows the light spot formed by stray light reflected by the inner diameter slope of the fourth spacing element P4' and the incident direction and reflection direction of the light on the inner diameter slope of the fourth spacing element P4' when the optical photography lens according to the exemplary embodiment of the present application satisfies the conditional expression R8 / d4s=-0.2. Fig.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 E4′ and the fifth lens 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 E4′, the fourth auxiliary spacing element P4b′ may be located between the fourth spacing element P4′ and the fifth lens 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 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 as follows: Fig.21As shown in FIG. 1 , it can be seen that the reflected light is not intercepted by, for example, the fourth auxiliary spacing element P4b′ and will further enter the rear optical system to form stray light. Fig. 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] Fig. 22 Fig.23 The figure shows the light spot formed by stray light reflected by the inner diameter slope of the fourth spacing element P4 when the optical photography lens according to the exemplary embodiment of the present application satisfies the conditional expression R8 / d4s=-0.7, and the incident direction and reflection direction of the light on the inner diameter slope of the fourth spacing element P4. Fig.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 E4 and the fifth lens 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 E4, the fourth auxiliary spacing element P4b may be located between the fourth spacing element P4 and the fifth lens 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 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 as follows: Fig.23 As shown, it can be seen that the reflected light can be effectively intercepted / blocked by, for example, the fourth auxiliary spacing element P4b, and will not be incident on the rear optical system further, which can effectively avoid or reduce the formation of stray light here. Fig. 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] Fig.24 and Fig.25 The figure shows the light spot formed by stray light reflected by the inner diameter slope of the fourth spacing element P4″ and the incident direction and reflection direction of the light on the inner diameter slope of the fourth spacing element P4″ when the optical photography lens according to the exemplary embodiment of the present application satisfies the conditional expression R8 / d4s=-1.2. Fig.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 E4″ and the fifth lens 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 E4″, the fourth auxiliary spacing element P4b″ may be located between the fourth spacing element P4″ and the fifth lens 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 E5″; the incident direction of, for example, a marginal field ray emitted through the fourth lens E4″ 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 as follows: Fig.25As shown in FIG. 1 , it can be seen that the reflected light is not intercepted by, for example, the fourth auxiliary spacing element P4b″ and will further enter the rear optical system to form stray light. Fig.24 It can be seen that the light spot area formed by the inner diameter reflection of the fourth spacing element P4″ is also larger and the intensity is also higher.

[0059] Analysis and comparison Figure 20 to Figure 25 It can be seen from the above three different situations that the optical photography lens according to the embodiment of the present application reasonably sets the optical focal length of the first to seventh lenses and the fourth spacing element so that the lens satisfies the conditional formula 3.85<CP4 / T45<19.6 and the conditional formula 2.15<|R9 / d4m|<2.55, and at the same time, sets the ratio of the curvature radius R8 of the image side surface of the fourth lens to the inner diameter d4s of the object side surface of the fourth spacing element to satisfy the range of -1.0<R8 / d4s<-0.4, which can effectively control the risk of stray light generated by reflection when the large-angle incident light of the edge field of view between the fourth and fifth lenses is incident on the inner diameter inclined surface of the thicker spacing element set here due to the large edge span of the effective diameter of the fourth and fifth lenses, thereby significantly suppressing the generation of stray light here and improving the lens performance.

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

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

[0062] In an exemplary embodiment, the at least one spacer element in the optical photographic lens 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.

[0063] In an exemplary embodiment, the at least one spacer element in the optical photographic lens 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.

[0064] In an exemplary embodiment, the at least one spacer element in the optical photographic lens 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.

[0065] In an exemplary embodiment, the at least one spacer element in the optical photographic lens 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.

[0066] In an exemplary embodiment, the at least one spacer element in the optical photographic lens 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.

[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 may satisfy the conditional formula 1.1<CT2 / (T23+CP2)≤4.4, wherein CT2 is the center thickness of the second lens on the optical axis, T23 is the air spacing between the second lens and the third lens on the optical axis, and CP2 is the maximum thickness of the second spacing element. The maximum thickness of the second spacing element may be the maximum thickness of the second spacing element along the optical axis or in a direction parallel to the optical axis, and the air spacing between the second lens and the third lens on the optical axis may be the distance from the image side surface of the second lens to the object side surface of the third lens on the optical axis. By controlling the optical photography lens to satisfy the conditional formula 1.1<CT2 / (T23+CP2)≤4.4, the middle thickness of the second lens and the thickness of the second spacing element as well as the air gap between the second and third lenses may be directly controlled, which is beneficial to the thickness ratio of the middle thickness to the edge thickness of the second lens as a whole, and is beneficial to ensuring the molding feasibility of the second lens and improving its molding stability. At the same time, the strength of the second lens and the second spacing element may be effectively guaranteed, and the assembly stability may be improved.

[0069] In an exemplary embodiment, the optical photography lens of the present application may satisfy the conditional formula 1.4<|R1×N1| / d1s<6.5, wherein 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 spacing element. By controlling the optical photography lens to satisfy the conditional formula 1.4<|R1×N1| / d1s<6.5, the radius of curvature and the refractive index of the object side surface of the first lens and the inner diameter of the object side surface of the first spacing element may be directly controlled, thereby facilitating the refraction angle of each field light entering the first lens. At the same time, the reasonable setting of the inner diameter of the first spacing element may 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 may satisfy: 1.45<|R1×N1| / d1s<6.45. Further, 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 formula 0.1≤(EP01-CT1) / (CT1+T12)≤0.4, wherein EP01 is the distance from the object side end surface of the lens barrel to the object side surface of the first spacing element on the optical axis, CT1 is the center thickness of the first lens on the optical axis, and T12 is the air gap between the first lens and the second lens on the optical axis. The object side end surface of the lens barrel may be the surface or end surface of the lens barrel that is closest to the object side and is perpendicular or nearly perpendicular to the optical axis; the air gap between the first lens and the second lens on the optical axis may be the distance from the image side surface of the first lens to the object side surface of the second lens on the optical axis. 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 middle thickness of the first lens can be directly controlled, and the thickness of the first spacing element can be indirectly controlled, which can effectively ensure the strength of the supporting surface at the front end / object side end of the lens barrel, which is beneficial to ensuring the stability of the overall lens assembly process and the reliability requirements of mechanical reliability such as falling; at the same time, it is beneficial to ensure the level of the edge thickness of the first lens and the thickness of the first spacing element, which is beneficial to 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 formula 1.05<|R2 / D1s|<4.3, wherein R2 is the radius of curvature of the image side surface of the first lens, and D1s is the outer diameter of the object side surface of the first spacing element. By controlling the optical photography lens to satisfy the conditional formula 1.05<|R2 / D1s|<4.3, the radius of curvature of the image side surface of the first lens and the outer diameter level of the first spacing element can be reasonably controlled, and the refraction direction and refraction angle of the imaging light of each field of view after passing through the first lens can be effectively guaranteed. At the same time, the outer diameter level of the first spacing element can control the compressive torque of the first spacing element when it is assembled, reduce the impact of the rear components on it when it is assembled, and improve the overall assembly stability of the lens.

[0072] In an exemplary embodiment, the optical photography lens of the present application may satisfy the conditional formula 7.3<R3 / (D2s-D1m)<15.4, wherein R3 is the radius of curvature of the object side surface of the second lens, D2s is the outer diameter of the object side surface of the second spacing element, and D1m is the outer diameter of the image side surface of the first spacing element. By controlling the optical photography lens to satisfy the conditional formula 7.3<R3 / (D2s-D1m)<15.4, the non-imaging light entering / emitting the second lens can be directly controlled, and the inner aperture of the spacing element before and after the second lens can intercept the transmitted stray light and the internal reflected stray light of the second lens, thereby improving the glare level of the overall lens and improving the cleanliness of the image.

[0073] In an exemplary embodiment, the optical photography lens of the present application may satisfy the conditional formula -39.1<f3 / (CT3+CP2+CP3)≤-11.0, wherein f3 is the effective focal length of the third lens, CT3 is the center thickness of the third lens 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 may be the maximum thickness of the spacer element along the optical axis or in a direction parallel to the optical axis. By controlling the optical photography lens to satisfy the conditional formula -39.1<f3 / (CT3+CP2+CP3)≤-11.0, effective control of the focal length of the third lens may be achieved, and at the same time, the thickness of the second spacer element, the third spacer element, and the middle-thickness distribution of the third lens may 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. More specifically, f3, CT3, CP2, and CP3 may 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 formula 1.35<|R7 / R6|×(d4s / d3m)≤2.4, wherein R7 is the radius of curvature of the object side surface of the fourth lens, R6 is the radius of curvature of the image side surface of the third lens, d4s is the inner diameter of the object side surface of the fourth spacing element, and d3m is the inner diameter of the image side surface of the third spacing element. By controlling the optical photography lens to satisfy the conditional formula 1.35<|R7 / R6|×(d4s / d3m)≤2.4, the radius of curvature of the image side surface of the third lens and the object side surface of the fourth lens can be effectively controlled to ensure that the imaging light is refracted in the desired direction between the third and fourth lenses. At the same time, the control of the inner diameter of the image side surface of the third spacing element and the inner diameter of the object side surface of the fourth spacing element can effectively control and weaken the stray light intensity of the fourth lens, and intercept part of the transmitted and reflected stray light light paths.

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

[0076] In an exemplary embodiment, the optical photography lens of the present application may satisfy the conditional formula 0.8<(EP45+CP5) / CT5<2.3, wherein EP45 is the distance from the image side surface of the fourth spacer element to the object side surface of the fifth spacer element on the optical axis, CP5 is the maximum thickness of the fifth spacer element, CT5 is the center thickness of the fifth lens on the optical axis, and the maximum thickness of the spacer element may 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 middle thickness of the fifth lens may be directly controlled, the thickness ratio of the fifth lens may be reasonably controlled, the molding feasibility of the fifth lens may be improved, the risk of weld marks may be reduced, and the structural strength of the fifth spacer element may be effectively guaranteed. More specifically, EP45, CP5, and CT5 may 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 may satisfy the conditional formula 5.8<R11 / |d5s-d5m|<11.6, wherein R11 is the radius of curvature of the object side of the sixth lens, d5s is the inner diameter of the object side of the fifth spacer element, and d5m is the inner diameter of the image side 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 at the same time, the amount of 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 may satisfy the conditional formula 0.25<R12 / D5m<0.6, wherein R12 is the radius of curvature of the image side surface of the sixth lens, 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 to the outer diameter of the image side surface of the fifth spacer element within this range, the outer diameter level of the sixth lens can be indirectly guaranteed to be within a suitable range, thereby controlling the possibility of stray light reflected from the structural area of ​​the sixth lens; at the same time, controlling the radius of curvature of the image side surface of the sixth lens can optimize the reflected ghost images of the image side surface of the sixth lens and the object side surface of the seventh lens to a certain extent.

[0079] In an exemplary embodiment, the optical photography lens of the present application may satisfy the conditional formula 4.1<T67 / EP56+T67 / CT7<6.3, wherein T67 is the air spacing between the sixth lens and the seventh lens on the optical axis, that is, the distance from the image side surface of the sixth lens to the object side surface of the seventh lens on the optical axis, EP56 is the distance from the image side surface of the fifth spacing element to the object side surface of the sixth spacing element on the optical axis, and CT7 is the center thickness of the seventh lens on the optical axis. By controlling the optical photography lens to satisfy the conditional formula 4.1<T67 / EP56+T67 / CT7<6.3, the edge thickness of the sixth lens and the middle thickness of the seventh lens can be effectively controlled, which is conducive to ensuring the molding stability of the last two lenses, ensuring the stability of data such as lens surface eccentricity, and helping to improve the MTF performance yield. More specifically, T67, EP56 and CT7 can also satisfy: 4.1<T67 / EP56+T67 / CT7<6.25. Furthermore, T67, EP56 and CT7 may also satisfy: 4.11≤T67 / EP56+T67 / CT7≤6.23.

[0080] In an exemplary embodiment, the optical photography lens of the present application may satisfy the conditional formula 0.33<f6 / f7≤2.0, wherein f6 is the effective focal length of the sixth lens, and f7 is the effective focal length of the seventh lens. By controlling the ratio of the effective focal length of the sixth lens to the effective focal length of the seventh lens within this range, the effective focal lengths of the sixth lens and the seventh lens may be directly controlled to adjust the refraction of the full field of view light at the rear end of the optical system to propagate in the desired direction, ultimately achieving a predetermined image height, and at the same time being able to reduce the surface sensitivity of the overall external field of view MTF to a certain extent.

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

[0082] In an exemplary embodiment, the optical photography lens of the present application may satisfy the conditional formula 1.14<|R14| / (D6m-d6m)≤1.85, wherein R14 is the radius of curvature of the image side surface of the seventh lens, D6m is the outer diameter of the image side surface of the sixth spacing element, and d6m is the inner diameter of the image side surface of the sixth spacing element. By controlling the optical photography lens to satisfy the conditional formula 1.14<|R14| / (D6m-d6m)≤1.85, the bearing area of ​​the sixth spacing element and the seventh lens can be guaranteed, thereby ensuring the stability of the assembly bearing between the sixth spacing element and the seventh lens, thereby improving the overall lens assembly stability; at the same time, it can be beneficial to indirectly control the surface shape of the surface of the seventh lens facing the light-emitting side, thereby improving the processability of the seventh lens.

[0083] In an exemplary embodiment, the optical photography lens of the present application may include at least one aperture. The aperture may constrain the light path and control the light intensity. The aperture may be set at an appropriate position of the optical photography lens, for example, the aperture may be set between the first lens and the second lens; or, the aperture may also be set between the object side and the first lens; or, the aperture may also be set between the second lens and the third lens.

[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 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; at least one aspherical lens is included among the first to seventh lenses; the number of lenses with optical focal length in the optical photographic lens is seven; 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 between the fourth lens and the fifth lens on the optical axis satisfy the conditional formula 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 conditional formula -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 conditional formula 2.15<|R9 / d4m|<2.55. Through this setting of the optical photography lens, the lens can achieve the technical characteristics of high pixel and small distortion, wherein 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 formula 3.85<CP4 / T45<19.6, which means that the span of the effective diameter edge of the fourth and fifth lenses is large, and a thicker spacer element needs to be set here for spacing, and the angle of the edge field of view light here is steeper. When the incident light at a large angle is incident, there is a certain risk of stray light reflected by the inner diameter inclined surface of this spacer element. By simultaneously controlling to satisfy the conditional formulas -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, 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; at least one aspherical lens is included among the first to seventh lenses; 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 conditional formula 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 / emitting 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 overall lens and improving the cleanliness of the picture.

[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; at least one aspherical lens is included among the first to seventh lenses; 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 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 the 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 there is an air gap 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 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 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 conditional formula 4.1<T67 / EP56+T67 / CT7<6.3. Through this setting of the optical photography lens, the lens can achieve the technical characteristics of high pixels and small distortion; the edge thickness of the sixth lens and the middle thickness of the seventh lens can be effectively controlled, which is beneficial to ensure the molding stability of the last two lenses, ensure the stability of data such as the lens surface eccentricity, and help improve the MTF performance yield.

[0089] However, it should be understood by those skilled in the art that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical photographic lens may be changed, and the number of spacing elements may also be changed to obtain the various results and advantages described in the present specification, and the present application does not specifically limit this. For example, although seven lenses are described as an example in the embodiment, the optical photographic lens is not limited to including seven lenses. If necessary, the optical photographic lens may also include other numbers of lenses. For another example, as needed, the optical photographic lens may also include other numbers of spacing elements different from those described in the above embodiment.

[0090] Specific embodiments of the optical photographic 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 Embodiment 1 of the present application is 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 accommodated 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 focal power, its object side surface S1 is concave, and its image side surface S2 is convex. The second lens E2 has positive focal power, its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has positive focal power, its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has positive focal power, its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, its object side surface S13 is concave, and its image side surface S14 is convex.

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

[0097] Table 1 shows basic parameters of the optical photography lens of Example 1, wherein the units of the radius of curvature 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, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0102]

[0103] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. 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, A48, A49, A50, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75 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 multiple related parameters of the lens barrel and each spacer element in this embodiment are shown in the column 'Example 1' in Table 7, and the specific descriptions of the multiple related 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 from the object side end face of the lens barrel P0 to the object side face of the first spacer element P1 on the optical axis, EP34 is the distance from the image side face of the third spacer element P3 to the object side face of the fourth spacer element P4 on the optical axis, EP45 is the distance from the image side face of the fourth spacer element P4 to the object side face of the fifth spacer element P5 on the optical axis, and EP56 is the distance from the image side face of the fifth spacer element P5 to the object side face of the sixth spacer element P6 on the optical axis. The units of the above-mentioned parameter values ​​shown in Table 7 are all millimeters (mm), and the above-mentioned parameters can be schematically shown in the structural diagram of the optical photographic lens as shown in the figure. Figure 1 shown.

[0111] Example 2

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

[0113] like Figure 3As shown, in this embodiment, similar to Embodiment 1, the optical photographic 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.

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

[0115] The values ​​of the relevant parameters of the optical photographic lens of this embodiment are shown in the column of 'Example 2' in 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.

[0116] Figure 4 The axial chromatic aberration curves of the optical photographic lenses of Example 1 and Example 2 are shown, which indicate the deviation of the convergent focus of light rays of different wavelengths passing through the back of the lens. Figure 5 Astigmatism curves of the optical photographic lenses of Examples 1 and 2 are shown, which represent meridional field curvature and sagittal field curvature. Figure 6 The distortion curves of the optical photographic lenses of Example 1 and Example 2 are shown, which represent the distortion magnitude values ​​corresponding to different field angles. Figure 7 The magnification chromatic aberration curves of the optical photographic lenses of Example 1 and Example 2 are shown, which represent the deviations of 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 is 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 accommodated 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, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is convex. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has positive focal power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has positive focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave.

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

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

[0124]

[0125]

[0126] Table 3

[0127] In this embodiment, the object side surface and the image side surface of any lens of the first lens E1 to the seventh lens E7 are both aspherical surfaces, and 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, A51, A52, A53, A54, A55, A56, A57, A58, A59, A60, A61, A71, A72, A73, A74, A75 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 relevant parameters of the optical photographic lens of this embodiment are shown in the 'Example 3' column of Table 7, wherein 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 Fig. 9 An optical photographic lens according to Example 4 of the present application is described.

[0135] like Fig. 9As shown, in this embodiment, similar to Embodiment 3, the optical photographic 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.

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

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

[0138] Fig.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 rays of different wavelengths passing through the back of the lens. Fig.11 Astigmatism curves of the optical photographic lenses of Examples 3 and 4 are shown, which represent meridional field curvature and sagittal field curvature. Fig.12 The distortion curves of the optical photography lenses of Example 3 and Example 4 are shown, which represent the distortion magnitude values ​​corresponding to different field angles. Fig.13 The magnification chromatic aberration curves of Example 3 and Example 4 are shown, which represent the deviations 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 Fig.14 An optical photographic lens according to Example 5 of the present application is described.

[0141] like Fig.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 accommodated 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, and its object side surface S1 is concave, and its image side surface S2 is convex. The second lens E2 has negative optical power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has negative optical power, and its object side surface S5 is concave, and its image side surface S6 is concave. The fourth lens E4 has positive optical power, and its object side surface S7 is convex, and its image side surface S8 is convex. The fifth lens E5 has positive optical power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has negative optical power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative optical power, and its object side surface S13 is concave, and its image side surface S14 is convex.

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

[0145] Table 5 shows basic parameters of the optical photography lens of Example 5, wherein the units of the radius of curvature 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 of the first lens E1 to the seventh lens E7 are both aspherical surfaces, and 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 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 relevant parameters of the optical photographic lens of this embodiment are shown in the 'Example 5' column of Table 7, wherein 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.

[0155] Example 6

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

[0157] like Fig.15As shown, in this embodiment, similar to Embodiment 5, the optical photographic 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] Furthermore, the basic parameter table of the optical photographic lens of this embodiment is the same as Table 5 in Embodiment 5, and the high-order coefficient table of the aspherical mirror surface is the same as Table 6-1 and Table 6-2 in Embodiment 5.

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

[0160] Fig.16 The axial chromatic aberration curves of the optical photographic lenses of Examples 5 and 6 are shown, which indicate the deviation of the convergent focus of light rays of different wavelengths passing through the rear of the lens. Fig.17 Astigmatism curves of the optical photographic lenses of Examples 5 and 6 are shown, which represent meridional field curvature and sagittal field curvature. Fig.18 The distortion curves of the optical photographic lenses of Examples 5 and 6 are shown, which represent the distortion magnitude values ​​corresponding to different field angles. Fig.19 The magnification chromatic aberration curves of Example 5 and Example 6 are shown, which represent the deviations 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 / Examples 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 satisfy the conditions shown in Table 9 below.

[0167]

[0168]

[0169] Table 9

[0170] The present application also provides an imaging device, which is provided with an electronic photosensitive element for imaging, and the electronic photosensitive element can be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The imaging device can be an independent imaging device such as a digital camera, or an imaging module integrated in a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical photographic lens described above.

[0171] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of protection involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the present application. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) to form a technical solution.

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 spacing 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 spacing 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 spacing 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 interval T23 between the second lens and the third lens on the optical axis, and the maximum thickness CP2 of the second spacing 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 photographic lens further comprises a lens barrel, in which the lens group and the at least one spacer element are assembled; And, the at least one spacer element further comprises: 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 interval T12 between the first lens and the second lens on the optical axis satisfy: 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 spacing element and the maximum thickness CP3 of the third spacing element satisfy: -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, characterized in that: 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 spacing element, and the inner diameter d3m of the image side surface of the third spacing element satisfy: 1.35<|R7 / R6|×(d4s / d3m)≤2.

4.

10. The optical photographic lens according to any one of claims 1 to 8, characterized in that: 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 spacing element to the object side surface of the fourth spacing element on the optical axis, and the maximum thickness CP4 of the fourth spacing element satisfy: 0.7<CT4 / (EP34+CP4)<1.

05.

11. The optical photographic lens according to any one of claims 1 to 8, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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 interval 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: 4.1<T67 / EP56+T67 / CT7<6.

3.

15. The optical photographic lens according to any one of claims 1 to 8, characterized in that: 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, characterized in that: 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, characterized in that: 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 spacing element, and the inner diameter d6m of the image side surface of the sixth spacing element satisfy: 1.14<|R14| / (D6m-d6m)≤1.85.

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