Optical photographic lens

Abstract

The invention discloses an optical photographic lens. The optical photographic lens comprises a lens group, a plurality of isolating rings and a lens barrel for accommodating the lens group and the plurality of isolating rings. The lens group sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which have focal power from the object side to the image side along the optical axis, the first lens and the sixth lens have positive focal power, the second lens and the seventh lens have negative focal power, and the fourth lens and the fifth lens have positive focal power. The number of lenses with focal power in the lens group is seven. And the plurality of isolating rings comprise a second isolating ring, a third isolating ring and a fourth isolating ring. The optical photographic lens satisfies the following condition: 0 < f3 * EP23 / f4 * EP34 < 5.

Description

[0001] Divisional Application Statement

[0002] This application is a divisional application of the Chinese invention patent application filed on June 25, 2023 with the invention name “Optical Photographic Lens” and application number 202310749624.2. Technical Field

[0003] The present application relates to the field of optical elements, and in particular, to an optical photography lens. Background Art

[0004] In recent years, smart electronic products such as smartphones have been rapidly updated. As an important component of smart electronic products, optical photography lenses have become one of the focuses of major smart terminal manufacturers and consumers. In order to improve the camera technology of smart electronic products, a product is usually equipped with a variety of camera lenses such as telephoto lenses, large image plane main camera lenses, ultra-wide-angle lenses, and front small head lenses. Among them, large image plane main camera lenses have become the core camera lenses in electronic products due to their larger image surface and higher image quality.

[0005] However, as the production process matures, the main camera lens for mobile phones and other electronic products has gradually developed from the original six-element type to a seven-element type. At the same time, as portable electronic products tend to be miniaturized, existing optical photography lenses are also developing in the direction of reducing the overall height to make electronic products lighter and thinner.

[0006] In order to meet market demand, the optical photography lenses installed in smartphones need to meet the requirements of occupying a small space in the mobile phone and having high-quality imaging quality in complex lighting conditions. However, the overall structure of the current seven-element lens is relatively long, which makes it difficult to meet the market demand for miniaturization of lenses. Summary of the invention

[0007] On one hand, the present application provides such an optical photographic lens, which includes a lens group, at least one isolating ring, and a lens barrel for accommodating the lens group and the at least one isolating ring in order from the object side to the image side along the optical axis. 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 with optical power in order from the object side to the image side along the optical axis, wherein the positive and negative properties of the optical power of the first lens and the seventh lens are different. At least one isolating ring includes: a third isolating ring located on the image side of the third lens and partially in contact with the image side surface of the third lens. The optical photographic lens can satisfy: |(D3m+d3m) / (D3m-d3m)×R5 / R6|<125, D3m is the outer diameter of the image side surface of the third isolating ring, d3m is the inner diameter of the image side surface of the third isolating ring, R5 is the radius of curvature of the object side surface of the third lens, and R6 is the radius of curvature of the image side surface of the third lens.

[0008] In one embodiment, at least one mirror surface from the object side surface of the first lens to the image side surface of the seventh lens is an aspherical mirror surface.

[0009] In one embodiment, at least one isolation ring further includes a fifth isolation ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens. The optical photography lens may satisfy: |f45×d5m / D5m×d3s / D3s|>5, wherein d5m is the inner diameter of the image side surface of the fifth isolation ring, D5m is the outer diameter of the image side surface of the fifth isolation ring, d3s is the inner diameter of the object side surface of the third isolation ring, D3s is the outer diameter of the object side surface of the third isolation ring, and f45 is the combined focal length of the fourth lens and the fifth lens.

[0010] In one embodiment, the at least one isolating ring further comprises a fifth isolating ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens. The optical photography lens may satisfy: 0<N5 / N6×T56 / CP5<30.0, wherein N5 is the refractive index of the fifth lens, N6 is the refractive index of the sixth lens, T56 is the air interval between the fifth lens and the sixth lens on the optical axis, and CP5 is the maximum thickness of the fifth isolating ring.

[0011] In one embodiment, at least one isolation ring further includes a sixth isolation ring located on the image side of the sixth lens and partially in contact with the image side surface of the sixth lens, and a seventh isolation ring located on the image side of the seventh lens and partially in contact with the image side surface of the seventh lens. The optical photography lens may satisfy: 40<N7×(d7m+d7s) / EP67<80, wherein d7m is the inner diameter of the image side surface of the seventh isolation ring, d7s is the inner diameter of the object side surface of the seventh isolation ring, EP67 is the spacing distance from the image side surface of the sixth isolation ring to the object side surface of the seventh isolation ring in the direction along the optical axis, and N7 is the refractive index of the seventh lens.

[0012] In one embodiment, the optical photography lens may satisfy: (R7-R6) / CP3>-700, wherein CP3 is the maximum thickness of the third isolation ring, R6 is the radius of curvature of the image side surface of the third lens, and R7 is the radius of curvature of the object side surface of the fourth lens.

[0013] In one embodiment, at least one isolation ring further includes a second isolation ring located on the image side of the second lens and partially in contact with the image side surface of the second lens, and a fourth isolation ring located on the image side of the fourth lens and partially in contact with the image side surface of the fourth lens. The optical photography lens may satisfy: 0<|f3×EP23| / |f4×EP34|<5, wherein EP23 is the spacing distance from the image side surface of the second isolation ring to the object side surface of the third isolation ring in the direction along the optical axis, EP34 is the spacing distance from the image side surface of the third isolation ring to the object side surface of the fourth isolation ring in the direction along the optical axis, f3 is the effective focal length of the third lens, and f4 is the effective focal length of the fourth lens.

[0014] In one embodiment, at least one isolation ring further includes a fourth isolation ring located on the image side of the fourth lens and partially in contact with the image side surface of the fourth lens, and a fifth isolation ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens. The optical photography lens may satisfy: CT5 / EP45<1.5, wherein EP45 is the spacing distance from the image side surface of the fourth isolation ring to the object side surface of the fifth isolation ring in the direction along the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis.

[0015] In one embodiment, the at least one isolating ring further comprises a fifth isolating ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens. The optical photographic lens may satisfy: |f5| / (D5s+d5s)>1, wherein D5s is the outer diameter of the object side surface of the fifth isolating ring, d5s is the inner diameter of the object side surface of the fifth isolating ring, and f5 is the effective focal length of the fifth lens.

[0016] In one embodiment, at least one isolation ring further includes: a fifth isolation ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens, and a sixth isolation ring located on the image side of the sixth lens and partially in contact with the image side surface of the sixth lens. The optical photography lens may satisfy: -270<CP6 / CP5×R13 / R12<-5, wherein CP5 is the maximum thickness of the fifth isolation ring, CP6 is the maximum thickness of the sixth isolation ring, R12 is the radius of curvature of the image side surface of the sixth lens, and R13 is the radius of curvature of the object side surface of the seventh lens.

[0017] In one embodiment, the at least one isolating ring further comprises a sixth isolating ring located on the image side of the sixth lens and partially in contact with the image side surface of the sixth lens. The optical photography lens may satisfy: 0.8<(d6m-d6s) / T67<2.5, wherein d6m is the inner diameter of the image side surface of the sixth isolating ring, d6s is the inner diameter of the object side surface of the sixth isolating ring, and T67 is the air spacing between the sixth lens and the seventh lens on the optical axis.

[0018] In one embodiment, the at least one isolating ring further comprises a fifth isolating ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens. The optical photography lens may satisfy: 0≤(d5m-d5s) / f6<0.3, wherein d5s is the inner diameter of the object side surface of the fifth isolating ring, d5m is the inner diameter of the image side surface of the fifth isolating ring, and f6 is the effective focal length of the sixth lens.

[0019] In one embodiment, at least one isolation ring also includes: a first isolation ring located on the image side of the first lens and in partial contact with the image side surface of the first lens; a second isolation ring located on the image side of the second lens and in partial contact with the image side surface of the second lens; a fourth isolation ring located on the image side of the fourth lens and in partial contact with the image side surface of the fourth lens; a fifth isolation ring located on the image side of the fifth lens and in partial contact with the image side surface of the fifth lens; a sixth isolation ring located on the image side of the sixth lens and in partial contact with the image side surface of the sixth lens; and a seventh isolation ring located on the image side of the seventh lens and in partial contact with the image side surface of the seventh lens. The optical photographic lens may satisfy: 0.5<ΣEP / TD<0.8, wherein ΣEP is the sum of EP01, EP12, EP23, EP34, EP45, EP56 and EP67, EP01 is the distance between the object side end of the lens barrel and the object side surface of the first isolation ring along the optical axis, EP12 is the distance between the image side surface of the first isolation ring and the object side surface of the second isolation ring along the optical axis, EP23 is the distance between the image side surface of the second isolation ring and the object side surface of the third isolation ring along the optical axis, EP34 is the spacing distance from the image side surface of the third isolation ring to the object side surface of the fourth isolation ring in the direction along the optical axis, EP45 is the spacing distance from the image side surface of the fourth isolation ring to the object side surface of the fifth isolation ring in the direction along the optical axis, EP56 is the spacing distance from the image side surface of the fifth isolation ring to the object side surface of the sixth isolation ring in the direction along the optical axis, EP67 is the spacing distance from the image side surface of the sixth isolation ring to the object side surface of the seventh isolation ring in the direction along the optical axis, and TD is the spacing distance from the object side surface of the first lens to the image side surface of the seventh lens on the optical axis.

[0020] In one embodiment, the optical photography lens may satisfy: MR>-75 mm, and MR is not 0, where MR is the radius of curvature of the imaging surface of the optical photography lens.

[0021] In one embodiment, the optical photography lens may satisfy: f6>0mm, f2<0mm, and f2 / f6>-2, wherein f2 is the effective focal length of the second lens, and f6 is the effective focal length of the sixth lens.

[0022] In the exemplary embodiment of the present application, by reasonably matching seven lenses, isolating rings and lens barrels, and reasonably setting the focal length of the first lens and the seventh lens, and the key technical parameters of the optical photography lens such as |(D3m+d3m) / (D3m-d3m)×R5 / R6|<125, the optical photography lens provided by the present application can have the characteristics of miniaturization and high resolution. For example, by reasonably matching seven lenses, isolating rings and lens barrels, the present application can make the optical photography lens have a certain imaging effect. On this basis, by setting the positive and negative properties of the focal length of the first lens and the seventh lens to be different, it is beneficial to control the incidence and emission of light, reduce the effective focal length of the lens, make the lens volume smaller, and thus facilitate the miniaturization of the lens; at the same time, by reasonably limiting the outer diameter and inner diameter of the image side of the third isolating ring and the curvature radius of the object side and the image side of the third lens, the vignetting value of the optical photography lens can be effectively controlled, so that the third isolating ring can intercept the light with poor imaging quality and excess stray light, so that the light in the lens is more convergent, thereby improving the resolution of the entire lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0024] Figures 1A to 1C They are schematic diagrams of the structures of the optical photographic lenses in three implementation modes in Example 1;

[0025] FIG. 2A to FIG. 2C The axial chromatic aberration curve, astigmatism curve and distortion curve of the optical photographic lens of Example 1 are respectively shown;

[0026] FIG. 3A to FIG. 3C They are schematic diagrams of the structures of the optical photographic lenses in three implementation modes in Example 2;

[0027] FIG. 4A to FIG. 4C The axial chromatic aberration curve, astigmatism curve and distortion curve of the optical photographic lens of Example 2 are respectively shown;

[0028] FIG. 5A to FIG. 5C They are schematic diagrams of the structures of the optical photographic lenses in three implementation modes in Example 3;

[0029] FIG. 6A to FIG. 6C The axial chromatic aberration curve, astigmatism curve and distortion curve of the optical photographic lens of Example 3 are respectively shown;

[0030] 7A to 7C They are schematic diagrams of the structures of the optical photographic lenses in three implementation modes in Example 4;

[0031] FIG. 8A to FIG. 8C The axial chromatic aberration curve, astigmatism curve and distortion curve of the optical photographic lens of Example 4 are respectively shown;

[0032] Fig. 9 is a schematic diagram of some parameters of an optical photographic lens according to an embodiment of the present application;

[0033] Fig.10 is a schematic diagram of an isolation ring in an optical photographic lens according to an embodiment of the present application; and

[0034] Fig.11 It is a partial light trend diagram in the optical photography lens according to the embodiment of the present application. DETAILED DESCRIPTION

[0035] 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.

[0036] 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, and the first isolation ring may also be referred to as the second isolation ring or the third isolation ring.

[0037] In the accompanying drawings, the thickness, size and shape of the lens have been slightly exaggerated for ease of description. Specifically, the shapes of the spherical or aspherical surfaces shown in the accompanying 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 accompanying drawings. The accompanying drawings are only examples and are not drawn strictly to scale. It should be understood that the thickness, size and shape of the isolation ring and the lens barrel have also been slightly exaggerated in the accompanying drawings for ease of description.

[0038] 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 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. It should be understood that the surface of each isolation ring closest to the subject is called the object side of the isolation ring, and the surface of each isolation ring closest to the imaging surface is called the image side of the isolation ring. The surface of the lens barrel closest to the subject is called the object side end of the lens barrel, and the surface of the lens barrel closest to the imaging surface is called the image side end of the lens barrel.

[0039] 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.

[0040] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as those 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.

[0041] 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 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, without departing from the concept of the present application, several deformations and improvements can be made, which all belong to the protection scope of the present application. For example, the lens groups (i.e., the first lens to the seventh lens), the lens barrel structure and the isolation ring in the embodiments of the present application can be arbitrarily combined, and are not limited to the lens group in one embodiment can only be combined with the lens barrel structure, isolation ring, etc. of the embodiment. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] The features, principles and other aspects of the present application are described in detail below.

[0043] The optical photography lens according to the exemplary embodiment of the present application may include seven lenses with optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The seven lenses are arranged in sequence from the object side to the image side along the optical axis. Any two adjacent lenses from the first lens to the seventh lens may have a spacing distance. Any lens from the first lens to the seventh lens may have a central thickness on the optical axis.

[0044] According to an exemplary embodiment of the present application, the first lens to the seventh lens may have an optical region for optical imaging and a non-optical region extending outward from the periphery of the optical region. Generally speaking, the optical region refers to the region of the lens for optical imaging, and the non-optical region is the structural region of the lens. In the assembly process of the optical photography lens, an isolation ring may be provided at the non-optical region of each lens and each lens may be connected to the lens barrel respectively by processes such as glue spot bonding. In the imaging process of the optical photography lens, the optical region of each lens may transmit light from an object to form an optical path and form a final optical image; and the non-optical region of each lens after assembly is contained in a lens barrel that cannot transmit light, so that the non-optical region does not directly participate in the imaging process of the optical photography lens. It should be noted that for ease of description, the present application divides each lens into two parts, the optical region and the non-optical region, for description, but it should be understood that the optical region and the non-optical region of the lens may be formed as a whole during the manufacturing process, rather than being formed as two separate parts.

[0045] According to an exemplary embodiment of the present application, the optical photography lens may include at least one isolation ring, for example, it may include at least one of the first isolation ring, the second isolation ring, the third isolation ring, the fourth isolation ring, the fifth isolation ring, the sixth isolation ring and the seventh isolation ring. Exemplarily, the first isolation ring may be located on the image side of the first lens and partially contact the image side surface of the first lens, and it may abut against the non-optical area of ​​the image side surface of the first lens. The second isolation ring may be located on the image side of the second lens and partially contact the image side surface of the second lens, and it may abut against the non-optical area of ​​the image side surface of the second lens. The third isolation ring may be located on the image side of the third lens and partially contact the image side surface of the third lens, and it may abut against the non-optical area of ​​the image side surface of the third lens. The fourth isolation ring may be located on the image side of the fourth lens and partially contact the image side surface of the fourth lens, and it may abut against the non-optical area of ​​the image side surface of the fourth lens. The fifth isolation ring may be located on the image side of the fifth lens and partially contact the image side surface of the fifth lens, and it may abut against the non-optical area of ​​the image side surface of the fifth lens. The sixth isolation ring may be located on the image side of the sixth lens and partially contact the image side surface of the sixth lens, and it may abut against the non-optical area of ​​the image side surface of the sixth lens. The seventh isolation ring may be located on the image side of the seventh isolation ring and partially contact the image side surface of the seventh isolation ring, and it may abut against the image side surface of the seventh isolation ring. Exemplarily, the first isolation ring may contact the non-optical area of ​​the image side surface of the first lens, and may contact the non-optical area of ​​the object side surface of the second lens. For example, the object side surface of the first isolation ring may contact the non-optical area of ​​the image side surface of the first lens, and the image side surface of the first isolation ring may contact the non-optical area of ​​the object side surface of the second lens.

[0046] The optical photographic lens according to an exemplary embodiment of the present application may include seven isolation rings, such as Figures 1A to 1C As shown, the optical photography lens may include a first isolation ring P1, a second isolation ring P2, a third isolation ring P3, a fourth isolation ring P4, a fifth isolation ring P5, a sixth isolation ring P6 and a seventh isolation ring P7. Exemplarily, the optical photography lens may include five isolation rings, such as Fig.10 As shown, the optical photographic lens may include a third isolation ring P3, a fourth isolation ring P4, a fifth isolation ring P5, a sixth isolation ring P6 and a seventh isolation ring P7.

[0047] According to an exemplary embodiment of the present application, an optical photographic lens may include a lens barrel that accommodates a lens group and at least one isolation ring. Figures 1A to 1C As shown, the lens barrel may be an integrated lens barrel for accommodating the first lens E1 to the seventh lens E7 and the first isolation ring P1 to the seventh isolation ring P7.

[0048] According to an exemplary embodiment of the present application, the isolation ring may include at least one spacer, such as Fig.11As shown, by reasonably setting the number, thickness, inner diameter and outer diameter of the spacers, it is helpful to improve the assembly of the optical photography lens, block stray light, and enhance the imaging quality of the optical photography lens.

[0049] In an exemplary embodiment, the positive and negative properties of the optical power of the first lens and the seventh lens are different. Exemplarily, the optical photography lens according to the present application may include a third isolation ring located on the image side of the third lens and partially in contact with the image side surface of the third lens. The optical photography lens may satisfy: |(D3m+d3m) / (D3m-d3m)×R5 / R6|<125, D3m is the outer diameter of the image side surface of the third isolation ring, d3m is the inner diameter of the image side surface of the third isolation ring, R5 is the radius of curvature of the object side surface of the third lens, and R6 is the radius of curvature of the image side surface of the third lens.

[0050] In the present application, by reasonably matching seven lenses, an isolating ring and a lens barrel, and reasonably setting the focal length of the first lens and the seventh lens, and the key technical parameters of the optical photographic lens such as |(D3m+d3m) / (D3m-d3m)×R5 / R6|<125, the optical photographic lens provided by the present application can have the characteristics of miniaturization and high resolution. For example, by reasonably matching seven lenses, an isolating ring and a lens barrel, the present application can make the optical photographic lens have a certain imaging effect. On this basis, by setting the positive and negative properties of the focal length of the first lens and the seventh lens to be different, it is beneficial to control the incidence and emission of light, reduce the effective focal length of the lens, make the lens volume smaller, and thus facilitate the miniaturization of the lens; at the same time, by reasonably limiting the outer diameter and inner diameter of the image side of the third isolating ring and the curvature radius of the object side and the image side of the third lens, the vignetting value of the optical photographic lens can be effectively controlled, so that the third isolating ring can intercept the light with poor imaging quality and excess stray light, so that the light in the lens is more convergent, thereby improving the resolution of the entire lens.

[0051] In an exemplary embodiment, the optical photography lens according to the present application may include a third isolation ring located on the image side of the third lens and partially in contact with the image side surface of the third lens, and a fifth isolation ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens. The optical photography lens may satisfy: |f45×d5m / D5m×d3s / D3s|>5, wherein d5m is the inner diameter of the image side surface of the fifth isolation ring, D5m is the outer diameter of the image side surface of the fifth isolation ring, d3s is the inner diameter of the object side surface of the third isolation ring, D3s is the outer diameter of the object side surface of the third isolation ring, and f45 is the combined focal length of the fourth lens and the fifth lens. In the present application, by setting the third isolation ring and the fifth isolation ring, the third lens and the fourth lens can be connected by the third isolation ring and the fifth lens and the sixth lens can be connected by the fifth isolation ring, so that the third isolation ring and the fifth isolation ring intercept excess light, prevent stray light, light leakage and other problems, which is conducive to improving the imaging quality of the lens and ensuring that the lens has a good imaging effect. On this basis, by setting |f45×d5m / D5m×d3s / D3s|>5, the degree of convergence of light can be effectively controlled by reasonably controlling the inner and outer diameters of the image side of the fifth isolation ring and the object side of the third isolation ring, and the combined focal length of the fourth lens and the fifth lens, which is beneficial to the adaptation of the light emission angle to the chip.

[0052] In an exemplary embodiment, the optical photography lens according to the present application may include a fifth isolation ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens. The optical photography lens may satisfy: 0<N5 / N6×T56 / CP5<30.0, wherein N5 is the refractive index of the fifth lens, N6 is the refractive index of the sixth lens, T56 is the air spacing between the fifth lens and the sixth lens on the optical axis, and CP5 is the maximum thickness of the fifth isolation ring. Satisfying 0<N5 / N6×T56 / CP5<30.0, the space allocation between the fifth lens and the sixth lens can be reasonably set by reasonably controlling the spacing between the fifth lens and the sixth lens on the optical axis, the maximum thickness of the fifth isolation ring, and the refractive index of the fifth lens and the sixth lens, thereby improving the assembly stability between the fifth lens and the sixth lens, and at the same time effectively controlling the material matching of the fifth lens and the sixth lens to be kept within a reasonable range, so that the performance and chromatic aberration between the lenses can be better balanced.

[0053] In an exemplary embodiment, the optical photography lens according to the present application may include a sixth isolation ring located on the image side of the sixth lens and partially in contact with the image side surface of the sixth lens, and a seventh isolation ring located on the image side of the seventh lens and partially in contact with the image side surface of the seventh lens. The optical photography lens may satisfy: 40<N7×(d7m+d7s) / EP67<80, wherein d7m is the inner diameter of the image side surface of the seventh isolation ring, d7s is the inner diameter of the object side surface of the seventh isolation ring, EP67 is the spacing distance from the image side surface of the sixth isolation ring to the object side surface of the seventh isolation ring in the direction along the optical axis, and N7 is the refractive index of the seventh lens. Satisfying 40<N7×(d7m+d7s) / EP67<80, the influence of excess light on the lens can be effectively reduced by reasonably controlling the refractive index of the seventh lens, the inner diameters of the object side and image side of the seventh isolation ring, and the distance between the sixth isolation ring and the seventh isolation ring along the optical axis, thereby ensuring that the lens has a better imaging effect. At the same time, it is beneficial for the thickness and shape of the seventh lens to meet the processing requirements and the seventh lens to have a better stray light ghost image performance.

[0054] In an exemplary embodiment, the optical photography lens according to the present application may satisfy: (R7-R6) / CP3>-700, wherein CP3 is the maximum thickness of the third isolation ring, R6 is the radius of curvature of the image side surface of the third lens, and R7 is the radius of curvature of the object side surface of the fourth lens. Satisfying (R7-R6) / CP3>-700 can effectively balance the astigmatism and coma between the third lens, the fourth lens, and the first to third lenses by reasonably controlling the relationship between the radius of curvature of the image side surface of the third lens, the radius of curvature of the object side surface of the fourth lens, and the maximum thickness of the third isolation ring, so that the lens has better imaging quality; at the same time, it is also beneficial to reduce the sensitivity of the lens, effectively avoiding the problem of significantly reduced performance due to the assembly tolerance during the assembly process due to the sensitivity of the third lens and the fourth lens, thereby helping to improve the yield rate and manufacturability of the lens.

[0055] In an exemplary embodiment, the optical photography lens according to the present application may include a second isolation ring located on the image side of the second lens and partially in contact with the image side surface of the second lens, and a fourth isolation ring located on the image side of the fourth lens and partially in contact with the image side surface of the fourth lens. The optical photography lens may satisfy: 0<|f3×EP23| / |f4×EP34|<5, wherein EP23 is the spacing distance from the image side surface of the second isolation ring to the object side surface of the third isolation ring in the direction along the optical axis, EP34 is the spacing distance from the image side surface of the third isolation ring to the object side surface of the fourth isolation ring in the direction along the optical axis, f3 is the effective focal length of the third lens, and f4 is the effective focal length of the fourth lens. When 0<|f3×EP23| / |f4×EP34|<5 is satisfied, the effective focal length of the third lens and the fourth lens and the distance between the lens edges of the two lenses along the optical axis direction can be reasonably controlled to effectively balance the space distribution between the third lens and the fourth lens in the lens, control the molding thickness of the third lens and the fourth lens within a reasonable range, improve the assembly stability between the third lens and the fourth lens, and help keep the processing angle of the third lens and the fourth lens within a reasonable processing range, so that the light transitions smoothly, thereby better balancing the chromatic aberration and field curvature generated by each lens.

[0056] In an exemplary embodiment, the optical photography lens according to the present application may include a fourth isolation ring located on the image side of the fourth lens and partially in contact with the image side surface of the fourth lens, and a fifth isolation ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens. The optical photography lens may satisfy: CT5 / EP45<1.5, wherein EP45 is the spacing distance from the image side surface of the fourth isolation ring to the object side surface of the fifth isolation ring in the direction along the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis. If CT5 / EP45<1.5 is satisfied, the processing uniformity of the fifth lens can be ensured by reasonably controlling the center thickness of the fifth lens on the optical axis and the thickness of the fifth lens between the fourth isolation ring and the fifth isolation ring, thereby preventing the fifth lens from generating product defects such as weld marks during the molding process, thereby affecting the imaging effect; at the same time, the strength of the fifth lens during the assembly process can be ensured, thereby avoiding the problem of excessive shape changes after assembly due to insufficient strength of the fifth lens part, thereby affecting the lens performance.

[0057] In an exemplary embodiment, the optical photographic lens according to the present application may include a fifth isolation ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens. The optical photographic lens may satisfy: |f5| / (D5s+d5s)>1, wherein D5s is the outer diameter of the object side surface of the fifth isolation ring, d5s is the inner diameter of the object side surface of the fifth isolation ring, and f5 is the effective focal length of the fifth lens. Satisfying |f5| / (D5s+d5s)>1 can reasonably control the effective focal length of the fifth lens and the ratio between the inner and outer diameters of the object side surface of the fifth isolation ring. On the one hand, it is beneficial for the fifth isolation ring to intercept excess light, reduce stray light formed by excess light, and ensure imaging effects; on the other hand, it is beneficial to reasonably control the step size of the fifth isolation ring in the direction perpendicular to the optical axis, increase the assembly stability of the front and rear lenses of the fifth isolation ring, and improve the yield rate and mass production of the lens.

[0058] In an exemplary embodiment, the optical photography lens according to the present application may include a fifth isolation ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens, and a sixth isolation ring located on the image side of the sixth lens and partially in contact with the image side surface of the sixth lens. The optical photography lens may satisfy: -270<CP6 / CP5×R13 / R12<-5, wherein CP5 is the maximum thickness of the fifth isolation ring, CP6 is the maximum thickness of the sixth isolation ring, R12 is the radius of curvature of the image side surface of the sixth lens, and R13 is the radius of curvature of the object side surface of the seventh lens. -270<CP6 / CP5×R13 / R12<-5 can be satisfied, and the spatial distances between the sixth lens and the front and rear isolation rings and the fifth lens and the seventh lens can be effectively balanced by reasonably controlling the ratio of the maximum thicknesses of the fifth isolation ring and the sixth isolation ring and the ratio of the curvature radii of the image side surface of the sixth lens and the object side surface of the seventh lens, thereby ensuring that the step difference is within a reasonable range, increasing the assembly stability of the sixth lens and the assembly stability of the seventh lens, and avoiding the problem of poor assembly stability caused by the excessive axial step difference between the fifth isolation ring and the sixth isolation ring; at the same time, the curvature radii of the object side surface and the image side surface of the sixth lens can be reasonably limited, thereby increasing the molding processability of the sixth lens and preventing molding defects during the molding process.

[0059] In an exemplary embodiment, the optical photography lens according to the present application may include a sixth isolation ring located on the image side of the sixth lens and partially in contact with the image side surface of the sixth lens. The optical photography lens may satisfy: 0.8<(d6m-d6s) / T67<2.5, wherein d6m is the inner diameter of the image side surface of the sixth isolation ring, d6s is the inner diameter of the object side surface of the sixth isolation ring, and T67 is the air gap between the sixth lens and the seventh lens on the optical axis. Satisfying 0.8<(d6m-d6s) / T67<2.5, the space size between the sixth lens and the seventh lens can be reasonably allocated by reasonably controlling the ratio of the inner diameter difference between the image side surface and the object side surface of the sixth isolation ring to the air gap between the sixth lens and the seventh lens on the optical axis, which is conducive to making the space between the sixth lens and the seventh lens more compact, and at the same time, it is conducive to ensuring that the inner diameter step difference of the sixth isolation ring is within a reasonable range, which is conducive to both miniaturization of the overall thickness of the lens and assembly stability of the sixth lens and the seventh lens.

[0060] In an exemplary embodiment, the optical photography lens according to the present application may include a fifth isolation ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens. The optical photography lens may satisfy: 0≤(d5m-d5s) / f6<0.3, wherein d5s is the inner diameter of the object side surface of the fifth isolation ring, d5m is the inner diameter of the image side surface of the fifth isolation ring, and f6 is the effective focal length of the sixth lens. Satisfying 0≤(d5m-d5s) / f6<0.3, the lens aberration can be effectively reduced and the convergence of the lens light can be ensured by reasonably controlling the effective focal length of the sixth lens and the relationship between the object side surface and the image side surface inner diameters of the fifth isolation ring; at the same time, by reasonably setting the inner diameters of the object side surface and the image side surface of the fifth isolation ring, it can be ensured that the fifth isolation ring has a smaller step difference, so that the step difference between the sixth lens and the fifth lens is smaller, and the assembly stability of the sixth lens is ensured, and the edge light emitted by the fifth lens can be effectively blocked to avoid stray light inside the sixth lens, thereby ensuring the imaging quality of the lens.

[0061] In an exemplary embodiment, the optical photographic lens according to the present application may include: a first isolation ring located on the image side of a first lens and in partial contact with the image side surface of the first lens; a second isolation ring located on the image side of a second lens and in partial contact with the image side surface of the second lens; a fourth isolation ring located on the image side of a fourth lens and in partial contact with the image side surface of the fourth lens; a fifth isolation ring located on the image side of a fifth lens and in partial contact with the image side surface of the fifth lens; a sixth isolation ring located on the image side of a sixth lens and in partial contact with the image side surface of the sixth lens; and a seventh isolation ring located on the image side of a seventh lens and in partial contact with the image side surface of the seventh lens. The optical photographic lens may satisfy: 0.5<ΣEP / TD<0.8, wherein ΣEP is the sum of EP01, EP12, EP23, EP34, EP45, EP56 and EP67, EP01 is the distance between the object side end of the lens barrel and the object side surface of the first isolation ring along the optical axis, EP12 is the distance between the image side surface of the first isolation ring and the object side surface of the second isolation ring along the optical axis, EP23 is the distance between the image side surface of the second isolation ring and the object side surface of the third isolation ring along the optical axis, EP34 is the distance between the image side of the third isolation ring and the object side of the fourth isolation ring in the direction of the optical axis, EP45 is the distance between the image side of the fourth isolation ring and the object side of the fifth isolation ring in the direction of the optical axis, EP56 is the distance between the image side of the fifth isolation ring and the object side of the sixth isolation ring in the direction of the optical axis, EP67 is the distance between the image side of the sixth isolation ring and the object side of the seventh isolation ring in the direction of the optical axis, and TD is the distance between the object side of the first lens and the image side of the seventh lens in the optical axis. Satisfying 0.5<ΣEP / TD<0.8 can not only make the structural length of the lens within a smaller range, the lens more miniaturized, and thus reduce the space occupied by the lens, but also balance the space distribution between each lens and each isolation ring in the lens, improve the uniformity of the distribution of each lens and each isolation ring, improve the overall processability and assembly ease of the lens, and ensure the yield and production efficiency of the lens product.

[0062] In an exemplary embodiment, the optical photography lens according to the present application may satisfy: MR>-75mm, and MR is not 0, where MR is the radius of curvature of the imaging surface of the optical photography lens. When MR>-75mm and MR is not 0, the radius of curvature of the imaging surface of the lens can be reasonably controlled so that the imaging surface of the lens can be better adapted to the radius of curvature of the receiving surface of the chip, thereby avoiding the field curvature deviation caused by the bending of the chip receiving surface affecting the clarity of the imaging, and effectively improving the imaging resolution of the entire screen. At the same time, more chip selections can be added, increasing the diversity of available lens combinations.

[0063] In an exemplary embodiment, the optical photographic lens according to the present application may satisfy: f6>0mm, f2<0mm and f2 / f6>-2, wherein f2 is the effective focal length of the second lens, and f6 is the effective focal length of the sixth lens. When f6>0mm, f2<0mm and f2 / f6>-2 are satisfied, the convergence and trend of light can be controlled by reasonably matching the effective focal lengths of the second lens and the sixth lens, thereby reducing the aberration and field curvature of the lens and ensuring the imaging resolution of the lens. At the same time, by controlling the ratio of the effective focal lengths of the second lens and the sixth lens, it is beneficial to make the transition of light smoother, reduce the optical sensitivity of the second lens and the sixth lens, improve the stability of the lens, and also help the optical photographic lens to have better ghost image performance and improve the imaging quality of the optical photographic lens.

[0064] In an exemplary embodiment, the optical photographic lens according to the present application further includes an aperture arranged between the object side and the first lens. Optionally, the above optical photographic lens may further include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface. The present application proposes an optical photographic lens having the characteristics of miniaturization, high resolution and high imaging quality. The optical photographic lens according to the above embodiment of the present application may use multiple lenses, such as the seven lenses mentioned above. By reasonably allocating the focal length, surface shape, material, center thickness of each lens and the on-axis spacing between each lens, the incident light can be effectively converged, the total optical length of the optical photographic lens can be reduced, and the processability of the optical photographic lens can be improved, so that the optical photographic lens is more conducive to production and processing. In the optical photographic lens of the above embodiment of the present application, by arranging an isolation ring between adjacent lenses and designing the inner and outer diameters of the isolation ring according to the optical path, stray light can be effectively blocked and eliminated, thereby improving the imaging quality of the optical photographic lens.

[0065] According to the seven-piece optical photography lens proposed in the above-mentioned embodiment of the present application, by reasonably setting the molding thickness of each lens and the position structure distribution of the last few lenses, it is beneficial to reduce the space occupied by the lens and realize the miniaturization of the lens. As the image plane size of the current large-image-plane camera lens gradually increases, the chip is affected by the manufacturing process and is difficult to ensure to be flat. In this way, the image plane of the chip itself will have a certain curvature, which will easily affect the overall imaging effect of the lens. Based on this, the present application designs the imaging surface of the lens to have a certain curvature, which can better adapt to the receiving surface of the chip and improve the imaging level of the overall picture.

[0066] In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the mirror surfaces from the object side of the first lens to the image side of the seventh lens is an aspherical mirror surface. The characteristic of the aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration occurring during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of the object side and image side of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens is an aspherical mirror surface. Optionally, the object side and image side of each lens in the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are all aspherical mirror surfaces.

[0067] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical photographic lens can be changed to obtain the various results and advantages described in this specification. 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.

[0068] Specific embodiments of the optical photographic lens applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0069] Example 1

[0070] The following reference Figures 1A to 2C An optical photographic lens according to Embodiment 1 of the present application is described. Figures 1A to 1C The optical photographic lenses in three implementation modes in Example 1 are respectively shown.

[0071] like Figures 1A to 1C As shown, the optical photography lens includes, from the object side to the image side, an aperture STO (not shown), a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter (not shown) and an imaging surface (not shown).

[0072] 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 negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has negative focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive 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 concave, and its image side surface S14 is concave. The imaging surface S17 of the optical photography lens is convex. The filter has an object side surface S15 and an image side surface S16. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0073] Table 1 shows the basic parameters of the optical photography lens of Example 1, wherein the units of the radius of curvature, thickness / distance and focal length are all millimeters (mm).

[0074]

[0075] Table 1

[0076] In this example, the total effective focal length f of the optical photographic lens is 7.24 mm.

[0077] like Figures 1A to 1C As shown, the optical photography lens may include seven isolation rings, namely, a first isolation ring P1, a second isolation ring P2, a third isolation ring P3, a fourth isolation ring P4, a fifth isolation ring P5, a sixth isolation ring P6 and a seventh isolation ring P7. The lens barrel may accommodate the first lens E1 to the seventh lens E7 and the first isolation ring P1 to the seventh isolation ring P7.

[0078] Table 2-1 and Table 2-2 show basic parameter tables of each isolation ring in three implementation modes of the optical photographic lens of Example 1, wherein the units of each basic parameter are millimeters (mm).

[0079]

[0080] Table 2-1

[0081]

[0082] Table 2-2

[0083] It should be understood that in this example, only the structures and parameters of the isolation rings under the three implementation modes are exemplarily listed, and the specific structures and actual parameters of the isolation rings are not clearly defined. In actual production, the specific structures and actual parameters of the isolation rings can be set in any suitable manner.

[0084] In Example 1, 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 x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0085]

[0086] 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 3-1 and 3-2 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, A76, A77, A8, A59, A60, A80, A51, A80, A90, A10, A110, A120, A130, A140, A151, A160, A170, A180, A190, A200, A210 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0087] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.7539E-04 -1.8077E-04 9.2519E-03 -3.5171E-02 7.2982E-02 -9.7620E-02 8.9239E-02 S2 -8.5081E-03 1.7321E-02 -4.7506E-02 1.1869E-01 -2.0756E-01 2.5257E-01 -2.1880E-01 S3 -1.3957E-02 9.0148E-03 5.5083E-03 1.7350E-02 -1.2564E-01 2.9115E-01 -3.8968E-01 S4 -9.8262E-03 3.1330E-02 -1.5940E-01 7.0129E-01 -2.0349E+00 4.0238E+00 -5.5929E+00 S5 -1.4292E-02 -7.2178E-03 -6.9451E-03 1.0540E-01 -4.1534E-01 9.6768E-01 -1.5132E+00 S6 -8.6566E-03 -3.6181E-02 1.4898E-01 -4.3582E-01 8.9605E-01 -1.3041E+00 1.3620E+00 S7 -1.4350E-02 -3.5440E-02 9.8572E-02 -1.7250E-01 2.1188E-01 -1.8595E-01 1.1830E-01 S8 -1.8872E-02 -1.1013E-02 2.2571E-02 -2.4120E-02 1.4809E-02 -3.5084E-03 -2.0458E-03 S9 -2.4868E-02 -1.0515E-02 1.0339E-02 1.6555E-02 -4.7365E-02 5.3634E-02 -3.7171E-02 S10 -4.4530E-02 -1.1386E-02 3.3322E-02 -3.3003E-02 2.0877E-02 -9.4117E-03 3.1290E-03 S11 -1.9272E-02 -1.9823E-02 1.8312E-02 -1.0735E-02 4.3070E-03 -1.2064E-03 2.3810E-04 S12 8.1117E-03 -2.5413E-02 1.5457E-02 -6.7859E-03 2.1769E-03 -5.0525E-04 8.4947E-05 S13 -9.3041E-02 1.6594E-02 -1.0213E-04 -3.4473E-04 5.3406E-05 -3.2179E-06 -7.0413E-08 S14 -9.6840E-02 2.5202E-02 -5.7902E-03 1.2351E-03 -2.0533E-04 2.3379E-05 -1.6658E-06

[0088] Table 3-1

[0089]

[0090]

[0091] Table 3-2

[0092] Figure 2A The axial chromatic aberration curve of the optical photographic lens of Example 1 is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the optical photographic lens. Figure 2B The astigmatism curve of the optical photographic lens of Example 1 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 2C The distortion curve of the optical photographic lens of Example 1 is shown, which indicates the distortion magnitude values ​​corresponding to different image heights. FIG. 2A to FIG. 2C It can be seen that the optical photography lens provided in Example 1 can achieve good imaging quality.

[0093] Example 2

[0094] The following reference FIG. 3A to FIG. 4CThe optical photographic lens according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. FIG. 3A to FIG. 3C The optical photographic lenses in three implementation modes in Example 1 are respectively shown.

[0095] like FIG. 3A to FIG. 3C As shown, the optical photography lens includes, from the object side to the image side, an aperture STO (not shown), a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter (not shown) and an imaging surface (not shown).

[0096] 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 negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. 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 convex, and its image side surface S8 is concave. The fifth lens E5 has negative focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive 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 concave, and its image side surface S14 is concave. The imaging surface S17 of the optical photography lens is convex. The filter has an object side surface S15 and an image side surface S16. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0097] In this example, the total effective focal length f of the optical photographic lens is 6.51 mm.

[0098] like FIG. 3A to FIG. 3C As shown, the optical photography lens may include seven isolation rings, namely, a first isolation ring P1, a second isolation ring P2, a third isolation ring P3, a fourth isolation ring P4, a fifth isolation ring P5, a sixth isolation ring P6 and a seventh isolation ring P7. The lens barrel may accommodate the first lens E1 to the seventh lens E7 and the first isolation ring P1 to the seventh isolation ring P7.

[0099] It should be understood that in this example, only the structures and parameters of the isolation rings under the three implementation modes are exemplarily listed, and the specific structures and actual parameters of the isolation rings are not clearly defined. In actual production, the specific structures and actual parameters of the isolation rings can be set in any suitable manner.

[0100] Table 4 shows the basic parameter table of the optical photography lens of Example 2, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Tables 5-1 and 5-2 show the basic parameter tables of each isolation ring in three implementations of the optical photography lens of Example 2, wherein the units of each basic parameter are all in millimeters (mm). Tables 6-1 and 6-2 show the high-order coefficients of each aspherical mirror surface that can be used in Example 2, wherein each aspherical surface shape can be defined by the formula (1) given in the above-mentioned Example 1.

[0101]

[0102] Table 4

[0103]

[0104] Table 5-1

[0105]

[0106] Table 5-2

[0107] Face number A4 A6 A8 A10 A12 A14 A16 S1 3.3724E-04 -3.8111E-04 2.9870E-03 -5.7427E-03 5.7095E-03 -3.3891E-03 1.3459E-03 S2 -2.2555E-02 2.6934E-02 -2.0409E-02 1.0966E-02 -2.9312E-03 -9.3303E-04 1.1616E-03 S3 -2.9805E-02 2.9886E-02 2.2612E-02 -1.4853E-01 3.3771E-01 -4.7415E-01 4.4273E-01 S4 -1.2183E-02 5.6206E-03 9.8613E-02 -4.8428E-01 1.4059E+00 -2.7429E+00 3.7228E+00 S5 -2.6826E-02 6.1269E-02 -4.6345E-01 2.0572E+00 -5.8603E+00 1.1237E+01 -1.4910E+01 S6 -2.5626E-02 -2.6045E-02 1.9940E-01 -7.4605E-01 1.8246E+00 -3.0695E+00 3.6528E+00 S7 -3.0353E-02 -4.0914E-03 3.6019E-02 -6.3809E-02 6.3149E-02 -2.5811E-02 -1.5659E-02 S8 -2.3858E-02 -3.3999E-03 2.5989E-02 -7.4076E-02 1.3186E-01 -1.5828E-01 1.3299E-01 S9 -3.3010E-02 1.6229E-02 -6.8306E-02 1.8090E-01 -2.9140E-01 3.0743E-01 -2.2410E-01 S10 -5.3333E-02 1.3180E-03 2.0488E-02 -2.4322E-02 1.6185E-02 -7.4235E-03 2.5125E-03 S11 -3.0182E-02 -1.0348E-02 1.1065E-02 -6.3239E-03 2.4615E-03 -7.0153E-04 1.4658E-04 S12 3.9599E-03 -2.1253E-02 1.1025E-02 -3.6233E-03 8.0412E-04 -1.2202E-04 1.2461E-05 S13 -7.7975E-02 1.0651E-02 -6.8546E-04 6.7611E-04 -2.8600E-04 5.9781E-05 -7.7478E-06 S14 -7.6059E-02 1.5485E-02 -2.1698E-03 1.4709E-04 2.4755E-05 -9.5579E-06 1.5308E-06

[0108] Table 6-1

[0109] Face number A18 A20 A22 A24 A26 A28 A30 S1 -4.8894E-04 2.0528E-04 -7.0801E-05 1.3967E-05 -1.1379E-06 0.0000E+00 0.0000E+00 S2 -3.8301E-04 1.9318E-05 1.5718E-05 -2.6462E-06 0.0000E+00 0.0000E+00 0.0000E+00 S3 -2.7889E-01 1.1711E-01 -3.1418E-02 4.8718E-03 -3.3226E-04 0.0000E+00 0.0000E+00 S4 -3.5559E+00 2.3813E+00 -1.0942E+00 3.2851E-01 -5.8035E-02 4.5753E-03 0.0000E+00 S5 1.3844E+01 -8.9636E+00 3.9619E+00 -1.1387E+00 1.9171E-01 -1.4335E-02 0.0000E+00 S6 -3.1202E+00 1.9189E+00 -8.4180E-01 2.5678E-01 -5.1711E-02 6.1763E-03 -3.3106E-04 S7 3.0537E-02 -2.2199E-02 9.6903E-03 -2.7242E-03 4.8494E-04 -4.9904E-05 2.2662E-06 S8 -7.9600E-02 3.4091E-02 -1.0359E-02 2.1779E-03 -3.0078E-04 2.4501E-05 -8.9041E-07 S9 1.1591E-01 -4.2896E-02 1.1283E-02 -2.0583E-03 2.4735E-04 -1.7590E-05 5.6014E-07 S10 -6.4813E-04 1.2947E-04 -1.9836E-05 2.2362E-06 -1.7226E-07 7.9957E-09 -1.6728E-10 S11 -2.2095E-05 2.3756E-06 -1.8001E-07 9.3952E-09 -3.2195E-10 6.5342E-12 -5.9656E-14 S12 -7.8476E-07 1.8853E-08 1.3986E-09 -1.5831E-10 7.0894E-12 -1.6146E-13 1.5336E-15 S13 6.8048E-07 -4.1957E-08 1.8275E-09 -5.5256E-11 1.1059E-12 -1.3191E-14 7.1049E-17 S14 -1.5198E-07 1.0145E-08 -4.6469E-10 1.4454E-11 -2.9243E-13 3.4776E-15 -1.8473E-17

[0110] Table 6-2

[0111] Figure 4A The axial chromatic aberration curve of the optical photographic lens of Example 2 is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the optical photographic lens. Figure 4B The astigmatism curve of the optical photographic lens of Example 2 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 4C The distortion curve of the optical photographic lens of Example 2 is shown, which indicates the distortion magnitude values ​​corresponding to different image heights. FIG. 4A to FIG. 4C It can be seen that the optical photography lens provided in Example 2 can achieve good imaging quality.

[0112] Example 3

[0113] The following reference FIG. 5A to FIG. 6C An optical photographic lens according to Example 3 of the present application is described. FIG. 5A to FIG. 5C The optical photographic lenses in three implementation modes in Example 3 are respectively shown.

[0114] like FIG. 5A to FIG. 5CAs shown, the optical photography lens includes, from the object side to the image side, an aperture STO (not shown), a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter (not shown) and an imaging surface (not shown).

[0115] 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 negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has negative focal power, and its object side surface S5 is concave, and its image side surface S6 is convex. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has positive focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive 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 concave, and its image side surface S14 is concave. The imaging surface S17 of the optical photography lens is convex. The filter has an object side surface S15 and an image side surface S16. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0116] In this example, the total effective focal length f of the optical photographic lens is 7.19 mm.

[0117] like FIG. 5A to FIG. 5C As shown, the optical photography lens may include seven isolation rings, namely, a first isolation ring P1, a second isolation ring P2, a third isolation ring P3, a fourth isolation ring P4, a fifth isolation ring P5, a sixth isolation ring P6 and a seventh isolation ring P7. The lens barrel may accommodate the first lens E1 to the seventh lens E7 and the first isolation ring P1 to the seventh isolation ring P7.

[0118] It should be understood that in this example, only the structures and parameters of the isolation rings under the three implementation modes are exemplarily listed, and the specific structures and actual parameters of the isolation rings are not clearly defined. In actual production, the specific structures and actual parameters of the isolation rings can be set in any suitable manner.

[0119] Table 7 shows the basic parameter table of the optical photography lens of Example 3, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Tables 8-1 and 8-2 show the basic parameter tables of the isolation rings of the three implementations of the optical photography lens of Example 3, wherein the units of the basic parameters are all in millimeters (mm). Tables 9-1 and 9-2 show the high-order coefficients of the aspherical mirror surfaces that can be used in Example 3, wherein the surface shapes of the aspherical surfaces can be defined by the formula (1) given in the above-mentioned Example 1.

[0120]

[0121]

[0122] Table 7

[0123]

[0124] Table 8-1

[0125]

[0126] Table 8-2

[0127] Face number A4 A6 A8 A10 A12 A14 A16 S1 3.7228E-04 -4.6672E-03 2.9880E-02 -9.1161E-02 1.7221E-01 -2.1812E-01 1.9241E-01 S2 -8.0038E-03 1.1231E-02 -1.7841E-02 4.1262E-02 -7.8711E-02 1.0631E-01 -1.0183E-01 S3 -1.7299E-02 3.4863E-02 -1.1707E-01 3.8753E-01 -8.7669E-01 1.3548E+00 -1.4673E+00 S4 -5.8029E-03 -1.8418E-02 1.6886E-01 -6.3019E-01 1.5501E+00 -2.6719E+00 3.3070E+00 S5 -1.2096E-02 -4.2917E-02 2.6312E-01 -1.0693E+00 2.8668E+00 -5.2920E+00 6.9173E+00 S6 -1.9510E-02 2.1913E-02 -7.7498E-02 1.7835E-01 -2.6975E-01 2.7009E-01 -1.7212E-01 S7 -2.6701E-02 -3.5410E-04 1.8649E-02 -3.2512E-02 3.4780E-02 -2.5533E-02 1.3669E-02 S8 -2.8629E-02 7.1875E-03 -5.1573E-03 1.2740E-02 -2.3423E-02 2.5857E-02 -1.8503E-02 S9 -4.1121E-02 2.3370E-02 -4.5838E-02 8.2962E-02 -1.0103E-01 8.2752E-02 -4.7401E-02 S10 -5.4780E-02 9.7830E-03 2.3932E-03 5.8642E-05 -4.0353E-03 3.7675E-03 -1.8165E-03 S11 -1.9862E-02 -2.0281E-02 1.8088E-02 -1.0066E-02 3.9074E-03 -1.0856E-03 2.1616E-04 S12 1.0657E-02 -2.8705E-02 1.6728E-02 -6.8301E-03 2.0581E-03 -4.6082E-04 7.6629E-05 S13 -9.2316E-02 1.8362E-02 -1.8310E-03 3.4746E-04 -1.0783E-04 2.1349E-05 -2.6578E-06 S14 -9.5168E-02 2.3940E-02 -4.7788E-03 7.9384E-04 -9.5658E-05 6.3031E-06 9.4248E-08

[0128] Table 9-1

[0129]

[0130]

[0131] Table 9-2

[0132] Fig. 6A The axial chromatic aberration curve of the optical photographic lens of Example 3 is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the optical photographic lens. Figure 6B The astigmatism curve of the optical photographic lens of Example 3 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 6C The distortion curve of the optical photographic lens of Example 3 is shown, which indicates the distortion magnitude values ​​corresponding to different image heights. FIG. 6A to FIG. 6C It can be seen that the optical photography lens provided in Example 3 can achieve good imaging quality.

[0133] Example 4

[0134] The following reference 7A to 8C An optical photographic lens according to Example 4 of the present application is described. 7A to 7C The optical photographic lenses in three implementation modes in Example 4 are respectively shown.

[0135] like 7A to 7C As shown, the optical photography lens includes, from the object side to the image side, an aperture STO (not shown), a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter (not shown) and an imaging surface (not shown).

[0136] 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 negative focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has negative focal power, and its object side surface S7 is convex, and its image side surface S8 is concave. The fifth lens E5 has negative focal power, and its object side surface S9 is convex, and its image side surface S10 is concave. The sixth lens E6 has positive 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 concave, and its image side surface S14 is concave. The imaging surface S17 of the optical photography lens is concave. The filter has an object side surface S15 and an image side surface S16. Light from an object passes through the surfaces S1 to S16 in sequence and is finally imaged on the imaging surface S17 .

[0137] In this example, the total effective focal length f of the optical photographic lens is 6.21 mm.

[0138] like 7A to 7C As shown, the optical photography lens may include seven isolation rings, namely, a first isolation ring P1, a second isolation ring P2, a third isolation ring P3, a fourth isolation ring P4, a fifth isolation ring P5, a sixth isolation ring P6 and a seventh isolation ring P7. The lens barrel may accommodate the first lens E1 to the seventh lens E7 and the first isolation ring P1 to the seventh isolation ring P7.

[0139] It should be understood that in this example, only the structures and parameters of the isolation rings under the three implementation modes are exemplarily listed, and the specific structures and actual parameters of the isolation rings are not clearly defined. In actual production, the specific structures and actual parameters of the isolation rings can be set in any suitable manner.

[0140] Table 10 shows the basic parameter table of the optical photography lens of Example 4, wherein the units of the radius of curvature, thickness / distance and focal length are all in millimeters (mm). Tables 11-1 and 11-2 show the basic parameter tables of the isolation rings of the three implementations of the optical photography lens of Example 4, wherein the units of the basic parameters are all in millimeters (mm). Tables 12-1 and 12-2 show the high-order coefficients of the aspherical mirror surfaces that can be used in Example 4, wherein the surface shapes of the aspherical surfaces can be defined by the formula (1) given in the above-mentioned Example 1.

[0141]

[0142] Table 10

[0143]

[0144] Table 11-1

[0145]

[0146] Table 11-2

[0147]

[0148]

[0149] Table 12-1

[0150] Face number A18 A20 A22 A24 A26 A28 A30 S1 -1.9710E-04 1.6062E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 1.2369E-04 5.3345E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 4.8119E-03 -8.7623E-04 7.0529E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 7.5081E-04 -6.5054E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 1.8014E-03 -1.5842E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 -2.5961E-03 2.7799E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S7 1.2678E-03 -1.0342E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 3.2524E-04 -8.6696E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 -2.2228E-02 6.2330E-03 -1.0598E-03 8.7146E-05 3.2879E-07 -4.0596E-07 0.0000E+00 S10 -2.0478E-04 4.2613E-05 -5.0014E-06 2.8610E-07 -2.5412E-09 -3.1295E-10 0.0000E+00 S11 -1.1107E-04 1.5386E-05 -1.5087E-06 1.0232E-07 -4.5667E-09 1.2078E-10 -1.4359E-12 S12 -1.9969E-05 1.7592E-06 -9.9162E-08 3.1219E-09 -2.5951E-11 -1.3600E-12 3.2027E-14 S13 -1.9191E-06 1.3281E-07 -6.4011E-09 2.1239E-10 -4.6412E-12 6.0278E-14 -3.5310E-16 S14 1.2314E-06 -7.9720E-08 3.7218E-09 -1.2135E-10 2.6154E-12 -3.3431E-14 1.9172E-16

[0151] Table 12-2

[0152] Fig. 8A The axial chromatic aberration curve of the optical photographic lens of Example 4 is shown, which indicates the deviation of the focusing point of light of different wavelengths after passing through the optical photographic lens. Figure 8B The astigmatism curve of the optical photographic lens of Example 4 is shown, which indicates the meridional field curvature and the sagittal field curvature. Figure 8C The distortion curve of the optical photographic lens of Example 4 is shown, which indicates the distortion magnitude values ​​corresponding to different image heights. FIG. 8A to FIG. 8C It can be seen that the optical photography lens provided in Example 4 can achieve good imaging quality.

[0153] In summary, Examples 1 to 4 satisfy the relationships shown in Tables 13-1, 13-2, 13-3, and 13-4, respectively.

[0154]

[0155]

[0156] Table 13-1

[0157]

[0158] Table 13-2

[0159]

[0160]

[0161] Table 13-3

[0162]

[0163] Table 13-4

[0164] The present application also provides an imaging device, whose electronic photosensitive element can be a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor element (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 photography lens described above.

[0165] 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 the invention 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 inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

Claims

1. An optical photographic lens, characterized in that: include: A lens group, comprising, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens having optical power, wherein the first lens and the sixth lens have positive optical power, the second lens and the seventh lens have negative optical power, and the number of lenses having optical power in the lens group is seven; a plurality of spacer rings, including a second spacer ring located on the image side of the second lens and in partial contact with the image side surface of the second lens, a third spacer ring located on the image side of the third lens and in partial contact with the image side surface of the third lens, and a fourth spacer ring located on the image side of the fourth lens and in partial contact with the image side surface of the fourth lens; and A lens barrel, used for accommodating the lens group and the plurality of isolation rings; The optical photography lens satisfies: 0<|f3×EP23| / |f4×EP34|<5, wherein EP23 is the spacing distance from the image side surface of the second isolation ring to the object side surface of the third isolation ring along the direction of the optical axis, EP34 is the spacing distance from the image side surface of the third isolation ring to the object side surface of the fourth isolation ring along the direction of the optical axis, f3 is the effective focal length of the third lens, and f4 is the effective focal length of the fourth lens.

2. The optical photographic lens according to claim 1, wherein: The plurality of isolation rings further include a fifth isolation ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens, wherein: The optical photography lens satisfies: 5<|f45×d5m / D5m×d3s / D3s|≤168.82, wherein d5m is the inner diameter of the image side surface of the fifth isolation ring, D5m is the outer diameter of the image side surface of the fifth isolation ring, d3s is the inner diameter of the object side surface of the third isolation ring, D3s is the outer diameter of the object side surface of the third isolation ring, and f45 is the combined focal length of the fourth lens and the fifth lens.

3. The optical photographic lens according to claim 1, wherein: The plurality of isolation rings further include a fifth isolation ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens, wherein: The optical photography lens satisfies: 0<N5 / N6×T56 / CP5<30.0, wherein N5 is the refractive index of the fifth lens, N6 is the refractive index of the sixth lens, T56 is the air gap between the fifth lens and the sixth lens on the optical axis, and CP5 is the maximum thickness of the fifth isolation ring.

4. The optical photographic lens according to claim 1, wherein: The plurality of isolation rings further include a sixth isolation ring located on the image side of the sixth lens and partially in contact with the image side surface of the sixth lens, and a seventh isolation ring located on the image side of the seventh lens and partially in contact with the image side surface of the seventh lens, wherein: The optical photography lens satisfies: 40<N7×(d7m+d7s) / EP67<80, wherein d7m is the inner diameter of the image side surface of the seventh isolation ring, d7s is the inner diameter of the object side surface of the seventh isolation ring, EP67 is the spacing distance from the image side surface of the sixth isolation ring to the object side surface of the seventh isolation ring in the direction along the optical axis, and N7 is the refractive index of the seventh lens.

5. The optical photographic lens according to claim 1, wherein: The optical photography lens satisfies: -700<(R7-R6) / CP3≤14499.97, wherein CP3 is the maximum thickness of the third isolation ring, R6 is the radius of curvature of the image side surface of the third lens, and R7 is the radius of curvature of the object side surface of the fourth lens.

6. The optical photographic lens according to claim 1, wherein: The plurality of isolation rings further include a fifth isolation ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens, wherein: The optical photography lens satisfies: 0.57≤CT5 / EP45<1.5, wherein EP45 is the spacing distance from the image side surface of the fourth isolation ring to the object side surface of the fifth isolation ring along the optical axis, and CT5 is the center thickness of the fifth lens on the optical axis.

7. The optical photographic lens according to claim 1, wherein: The plurality of isolation rings further include a fifth isolation ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens, wherein: The optical photography lens satisfies: 1<|f5| / (D5s+d5s)≤70.83, wherein D5s is the outer diameter of the object side surface of the fifth isolation ring, d5s is the inner diameter of the object side surface of the fifth isolation ring, and f5 is the effective focal length of the fifth lens.

8. The optical photographic lens according to claim 1, wherein: The plurality of isolation rings further include a fifth isolation ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens, and a sixth isolation ring located on the image side of the sixth lens and partially in contact with the image side surface of the sixth lens, wherein: The optical photography lens satisfies: -270<CP6 / CP5×R13 / R12<-5, wherein CP5 is the maximum thickness of the fifth isolation ring, CP6 is the maximum thickness of the sixth isolation ring, R12 is the radius of curvature of the image side surface of the sixth lens, and R13 is the radius of curvature of the object side surface of the seventh lens.

9. The optical photographic lens according to claim 1, wherein: The plurality of isolation rings further include a sixth isolation ring located on the image side of the sixth lens and partially in contact with the image side surface of the sixth lens, wherein: The optical photography lens satisfies: 0.8<(d6m-d6s) / T67<2.5, wherein d6m is the inner diameter of the image side surface of the sixth isolation ring, d6s is the inner diameter of the object side surface of the sixth isolation ring, and T67 is the air spacing between the sixth lens and the seventh lens on the optical axis.

10. The optical photographic lens according to claim 1, wherein: The plurality of isolation rings further include a fifth isolation ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens, wherein: The optical photography lens satisfies: 0≤(d5m-d5s) / f6<0.3, wherein d5s is the inner diameter of the object side surface of the fifth isolation ring, d5m is the inner diameter of the image side surface of the fifth isolation ring, and f6 is the effective focal length of the sixth lens.

Images