Optical photographic lens

Abstract

The present application discloses an optical photographic lens. The optical photographic lens comprises a lens set, a plurality of isolation rings, and a lens barrel for accommodating the lens set and the plurality of isolation rings. The lens set comprises, 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 with refractive powers, wherein the first lens and the sixth lens have positive refractive powers, the second lens and the seventh lens have negative refractive powers, and the number of lenses with refractive powers in the lens set is seven. The plurality of isolation rings comprises a sixth isolation ring and a seventh isolation ring. The optical photographic lens satisfies: 40 < N7 x (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 interval 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.

Description

[0001] Divisional Application Statement

[0002] This application is a divisional application of the Chinese Invention Patent Application No. 202310749624.2, filed on June 25, 2023, entitled “Optical Photography Lens”, which claims priority to the Chinese Invention Patent Application No. 202210593593.8, filed on May 27, 2022. TECHNICAL FIELD

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

[0004] In recent years, smart electronic products such as smartphones are rapidly updated and replaced, and optical photography lenses, as an important component in smart electronic products, have become one of the focuses of major smart terminal manufacturers and consumers. In order to improve the camera technology of smart electronic products, multiple camera lenses such as long-focus lenses, large-image main camera lenses, ultra-wide-angle lenses, and front small-head lenses are often equipped in a product at the same time, among which the large-image main camera lens has become the core camera lens in electronic products due to its larger image surface and higher imaging quality.

[0005] However, with the maturation of production processes, the main camera large-image lens of electronic products such as mobile phones has gradually developed from the original six-piece type to the seven-piece type. At the same time, with the development of portable electronic products towards miniaturization, the existing optical photography lenses are also developing towards the direction of compressing the overall height to make the electronic products more lightweight.

[0006] In order to meet market demand, optical photography lenses mounted on smart phones and the like need to meet the requirements of small space volume and high-quality imaging quality in complex light environments. However, the current seven-piece lens has a long overall mechanism, which is difficult to meet the market demand for lens miniaturization. SUMMARY

[0007] In one aspect, the present application provides an optical photographic lens comprising, in order from the object side to the image side along the optical axis, a lens group, at least one spacer ring, and a lens barrel for accommodating the lens group and the at least one spacer ring. The lens group comprises, in order from the object side to the image side along the optical axis, a first lens having optical power, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, wherein the first lens and the seventh lens have different signs of optical power. The at least one spacer ring comprises a third spacer 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, where D3m is an outer diameter of the image side surface of the third spacer ring, d3m is an inner diameter of the image side surface of the third spacer ring, R5 is a radius of curvature of the object side surface of the third lens, and R6 is a radius of curvature of the image side surface of the third lens.

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

[0009] In one embodiment, the at least one spacer ring further comprises a fifth spacer 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 can satisfy: |f45×d5m / D5m×d3s / D3s|>5, where d5m is an inner diameter of the image side surface of the fifth spacer ring, D5m is an outer diameter of the image side surface of the fifth spacer ring, d3s is an inner diameter of the object side surface of the third spacer ring, D3s is an outer diameter of the object side surface of the third spacer ring, and f45 is a combined focal length of the fourth lens and the fifth lens.

[0010] In one embodiment, the at least one spacer ring further comprises a fifth spacer 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 can satisfy: 0

[0011] In one embodiment, the at least one spacer ring further comprises a sixth spacer 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 spacer 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 photographic lens can satisfy: 40

[0012] In one embodiment, the optical photographic lens can satisfy: (R7-R6) / CP3 > -700, where CP3 is the maximum thickness of the third spacer 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, the at least one spacer ring further includes a second spacer 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 spacer 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 photographic lens can satisfy: 0 < |f3 x EP23| / |f4 x EP34| < 5, where EP23 is the separation distance in the direction along the optical axis from the image side surface of the second spacer ring to the object side surface of the third spacer ring, EP34 is the separation distance in the direction along the optical axis from the image side surface of the third spacer ring to the object side surface of the fourth spacer ring, 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, the at least one spacer ring further includes a fourth spacer 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 spacer 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 can satisfy: CT5 / EP45 < 1.5, where EP45 is the separation distance in the direction along the optical axis from the image side surface of the fourth spacer ring to the object side surface of the fifth spacer ring, and CT5 is the center thickness of the fifth lens in the optical axis.

[0015] In one embodiment, the at least one spacer ring further includes a fifth spacer 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 can satisfy: |f5| / (D5s+d5s) > 1, where D5s is the outer diameter of the object side surface of the fifth spacer ring, d5s is the inner diameter of the object side surface of the fifth spacer ring, and f5 is the effective focal length of the fifth lens.

[0016] In one embodiment, the at least one spacer ring further includes a fifth spacer 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 spacer 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 photographic lens can satisfy: -270 < CP6 / CP5 x R13 / R12 < -5, where CP5 is the maximum thickness of the fifth spacer ring, CP6 is the maximum thickness of the sixth spacer 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 spacer ring further includes a sixth spacer 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 photographic lens can satisfy: 0.8 < (d6m - d6s) / T67 < 2.5, where d6mis the inner diameter of the image side surface of the sixth spacer ring, d6sis the inner diameter of the object side surface of the sixth spacer ring, and T67is the air separation on the optical axis between the sixth lens and the seventh lens.

[0018] In one embodiment, the at least one spacer ring further includes a fifth spacer 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 can satisfy: 0 ≤ (d5m - d5s) / f6< 0.3, where d5sis the inner diameter of the object side surface of the fifth spacer ring, d5mis the inner diameter of the image side surface of the fifth spacer ring, and f6is the effective focal length of the sixth lens.

[0019] In one embodiment, the at least one spacer ring further includes: a first spacer ring located on the image side of the first lens and partially in contact with the image side surface of the first lens; a second spacer ring located on the image side of the second lens and partially in contact with the image side surface of the second lens; a fourth spacer ring located on the image side of the fourth lens and partially in contact with the image side surface of the fourth lens; a fifth spacer ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens; a sixth spacer 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 spacer 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 photographic lens can satisfy: 0.5 < ΣEP / TD < 0.8, where ΣEP is the sum of EP01, EP12, EP23, EP34, EP45, EP56, and EP67, EP01is the separation distance in the direction along the optical axis from the object side end of the lens barrel to the object side surface of the first spacer ring, EP12is the separation distance in the direction along the optical axis from the image side surface of the first spacer ring to the object side surface of the second spacer ring, EP23is the separation distance in the direction along the optical axis from the image side surface of the second spacer ring to the object side surface of the third spacer ring, EP34is the separation distance in the direction along the optical axis from the image side surface of the third spacer ring to the object side surface of the fourth spacer ring, EP45is the separation distance in the direction along the optical axis from the image side surface of the fourth spacer ring to the object side surface of the fifth spacer ring, EP56is the separation distance in the direction along the optical axis from the image side surface of the fifth spacer ring to the object side surface of the sixth spacer ring, EP67is the separation distance in the direction along the optical axis from the image side surface of the sixth spacer ring to the object side surface of the seventh spacer ring, and TD is the separation distance on the optical axis from the object side surface of the first lens to the image side surface of the seventh lens.

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

[0021] In one embodiment, the optical photographic lens can satisfy: f6>0mm, f2<0mm, and f2 / f6>-2, where 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 embodiments of the present application, by reasonably matching the seven lenses, the isolation rings, and the lens barrel, and by reasonably setting the focal power of the first lens and the seventh lens and the key technical parameters of the optical photographic lens such as |(D3m+d3m) / (D3m-d3m) x 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 the seven lenses, the isolation rings, and the lens barrel, the optical photographic lens can have certain imaging effect. On this basis, by setting the positive and negative properties of the focal power of the first lens and the seventh lens to be different, the incidence and emission of light can be controlled, the effective focal length of the lens can be reduced, the volume of the lens can be small, and thus the miniaturization of the lens can be realized. At the same time, by reasonably limiting the outer diameter and the inner diameter of the image side of the third isolation ring and the curvature radii of the object side and the image side of the third lens, the vignetting value of the optical photographic lens can be effectively controlled, the light with poor imaging quality and the excess stray light can be intercepted by the third isolation ring, the light in the lens can be more convergent, and thus the resolution of the entire lens can be improved. BRIEF DESCRIPTION OF DRAWINGS

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

[0024] Figures 1A to 1C are respectively structure schematic diagrams of the optical photographic lenses in the three implementation manners in Example 1;

[0025] Figures 2A to 2C respectively show the on-axis chromatic aberration curve, the astigmatism curve, and the distortion curve of the optical photographic lens of Example 1;

[0026] Figures 3A to 3C are respectively structure schematic diagrams of the optical photographic lenses in the three implementation manners in Example 2;

[0027] Figures 4A to 4C respectively show the on-axis chromatic aberration curve, the astigmatism curve, and the distortion curve of the optical photographic lens of Example 2;

[0028] Figures 5A to 5C are respectively structure schematic diagrams of the optical photographic lenses in the three implementation manners in Example 3;

[0029] Figures 6A to 6C respectively show the on-axis chromatic aberration curve, the astigmatism curve, and the distortion curve of the optical photographic lens of Example 3;

[0030] Figures 7A to 7C These are schematic diagrams of the optical camera lens under three different implementation methods in Example 4;

[0031] Figures 8A to 8C The on-axis chromatic aberration curve, astigmatism curve, and distortion curve of the optical camera lens of Example 4 are shown respectively.

[0032] Figure 9 This is a schematic diagram showing some parameters of an optical camera lens according to an embodiment of this application;

[0033] Figure 10 This is a schematic diagram of an isolation ring in an optical camera lens according to an embodiment of this application; and

[0034] Figure 11 This is a partial light path diagram in an optical camera lens according to an embodiment of this application. Detailed Implementation

[0035] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this 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 terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this 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 lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn to scale. It should be understood that, for ease of illustration, the thickness, size, and shape of the isolation ring and lens barrel have also been slightly exaggerated in the accompanying drawings.

[0038] In this text, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens. It should be understood that the surface of each isolation ring closest to the subject is called the object-side surface of the isolation ring, and the surface of each isolation ring closest to the imaging plane is called the image-side surface 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 plane is called the image-side end of the lens barrel.

[0039] It should also be understood that the terms "comprising," "including," "having," "containing," 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. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0040] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other. The following embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application. For example, the lens groups (i.e., the first to the seventh lenses), lens barrel structures, and isolation rings in the various embodiments of this application can be arbitrarily combined, and it is not limited to the lens group in one embodiment being only combined with the lens barrel structure, isolation ring, etc. of that embodiment. The present application will now be described in detail with reference to the accompanying drawings and embodiments.

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

[0043] An optical photographic lens according to an exemplary embodiment of this 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. These seven lenses are arranged sequentially along the optical axis from the object side to the image side. Any two adjacent lenses among the first to seventh lenses may have a spacing distance. Any lens among the first to seventh lenses may have a central thickness along the optical axis.

[0044] According to an exemplary embodiment of this application, each of the first to seventh lenses may have an optical region for optical imaging and a non-optical region extending outward from the outer periphery of the optical region. Generally speaking, the optical region refers to the area of ​​the lens used for optical imaging, while the non-optical region is the structural area of ​​the lens. During the assembly of the optical photographic lens, isolation rings can be set at the non-optical regions of each lens using processes such as adhesive bonding, and each lens can be connected to the lens barrel respectively. During the imaging process of the optical photographic lens, the optical regions of each lens can transmit light from the object to form an optical path, forming the final optical image; while the non-optical regions of each assembled lens are housed in the lens barrel, which cannot transmit light, thus the non-optical regions do not directly participate in the imaging process of the optical photographic lens. It should be noted that, for ease of description, this application describes each lens as divided into two parts: an optical region and a non-optical region. However, it should be understood that the optical region and the non-optical region of the lens can be formed as a whole during the manufacturing process, rather than as two separate parts.

[0045] An optical imaging lens according to an exemplary embodiment of this application may include at least one isolation ring, such as at least one of a first isolation ring, a second isolation ring, a third isolation ring, a fourth isolation ring, a fifth isolation ring, a sixth isolation ring, and a seventh isolation ring. Exemplarily, the first isolation ring may be located on the image side of a first lens and in contact with a portion of the image side surface of the first lens, and may abut against a non-optical region of the image side surface of the first lens. The second isolation ring may be located on the image side of a second lens and in contact with a portion of the image side surface of the second lens, and may abut against a non-optical region of the image side surface of the second lens. The third isolation ring may be located on the image side of a third lens and in contact with a portion of the image side surface of the third lens, and may abut against a non-optical region of the image side surface of the third lens. The fourth isolation ring may be located on the image side of a fourth lens and in contact with a portion of the image side surface of the fourth lens, and may abut against a non-optical region of the image side surface of the fourth lens. The fifth isolation ring may be located on the image side of a fifth lens and in contact with a portion of the image side surface of the fifth lens, and may abut against a non-optical region 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 may abut against a non-optical region 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 may abut against the image-side surface of the seventh isolation ring. Exemplarily, the first isolation ring may contact a non-optical region of the image-side surface of the first lens, and simultaneously contact a non-optical region of the object-side surface of the second lens. For example, the object-side surface of the first isolation ring may contact a non-optical region of the image-side surface of the first lens, and the image-side surface of the first isolation ring may contact a non-optical region of the object-side surface of the second lens.

[0046] An optical imaging lens according to an exemplary embodiment of this application may include seven isolation rings, such as... Figures 1A to 1C As shown, the optical imaging 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. For example, the optical imaging lens may include five isolation rings, such as... Figure 10 As shown, the optical camera 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] An optical photographic lens according to an exemplary embodiment of this application may include a lens barrel housing a lens group and at least one isolation ring. Exemplarily, such as... Figures 1A to 1C As shown, the lens barrel can be a one-piece lens barrel used to house 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 this application, the isolation ring may include at least one spacer, such as Figure 11As shown, by reasonably setting the number, thickness, inner diameter, and outer diameter of the spacers, it is beneficial to improve the assembly of optical photographic lenses, to block stray light, and to improve the imaging quality of optical photographic lenses.

[0049] In an exemplary embodiment, the first lens and the seventh lens have different positive and negative optical power attributes. Exemplarily, an optical imaging lens according to this 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 imaging lens may satisfy: |(D3m+d3m) / (D3m-d3m)×R5 / R6|<125, where 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 this application, by rationally combining seven lenses, an isolation ring, and a lens barrel, and by rationally setting the optical power of the first and seventh lenses, as well as key technical parameters of the optical photographic lens such as |(D3m+d3m) / (D3m-d3m)×R5 / R6|<125, the optical photographic lens provided by this application can possess characteristics such as miniaturization and high resolution. For example, by rationally combining seven lenses, an isolation ring, and a lens barrel, this application can achieve a certain imaging effect in the optical photographic lens. On this basis, by setting the positive and negative attributes of the optical power of the first and seventh lenses to be different, it is beneficial to control the incident and outgoing light, reduce the effective focal length of the lens, and make the lens smaller, thus facilitating lens miniaturization. At the same time, by rationally limiting the outer and inner diameters of the image side of the third isolation ring and the curvature radii of the object side and image side of the third lens, the vignetting value of the optical photographic lens can be effectively controlled, making it easier for the third isolation ring to intercept light with poor imaging quality and excess stray light, making the light in the lens more convergent, thereby improving the overall resolution of the lens.

[0051] In an exemplary embodiment, the optical photographic lens according to this application may include a third isolation ring located on the image side of the third lens and in contact with a portion of the image side of the third lens, and a fifth isolation ring located on the image side of the fifth lens and in contact with a portion of the image side of the fifth lens. The optical photographic lens may satisfy: |f45×d5m / D5m×d3s / D3s|>5, where d5m is the inner diameter of the image side of the fifth isolation ring, D5m is the outer diameter of the image side of the fifth isolation ring, d3s is the inner diameter of the object side of the third isolation ring, D3s is the outer diameter of the object side of the third isolation ring, and f45 is the combined focal length of the fourth and fifth lenses. In this application, by setting the third and fifth isolation rings, the third and fourth lenses can be connected using the third isolation ring, and the fifth and sixth lenses can be connected using the fifth isolation ring. This allows the third and fifth isolation rings to intercept excess light, preventing stray light, light leakage, and other problems, thereby improving the lens's imaging quality and ensuring a better imaging effect. Based on this, by setting |f45×d5m / D5m×d3s / D3s|>5, the 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, as well as the combined focal length of the fourth and fifth lenses. This is beneficial for the adaptation of the light emission angle to the chip.

[0052] In an exemplary embodiment, the optical imaging lens according to this application may include a fifth isolation ring located on the image side of the fifth lens and in contact with the image side surface of the fifth lens. The optical imaging lens satisfies: 0 < N5 / N6 × T56 / CP5 < 30.0, where 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 and sixth lenses on the optical axis, and CP5 is the maximum thickness of the fifth isolation ring. Satisfying 0 < N5 / N6 × T56 / CP5 < 30.0 allows for reasonable control of the spacing between the fifth and sixth lenses on the optical axis, the maximum thickness of the fifth isolation ring, and the refractive indices of the fifth and sixth lenses. This improves the assembly stability between the fifth and sixth lenses and effectively controls the material composition of the fifth and sixth lenses within a reasonable range, thereby achieving a better balance between the performance and chromatic aberration of each lens.

[0053] In an exemplary embodiment, the optical imaging lens according to this application may include a sixth isolation ring located on the image side of the sixth lens and in contact with a portion of the image-side surface of the sixth lens, and a seventh isolation ring located on the image side of the seventh lens and in contact with a portion of the image-side surface of the seventh lens. The optical imaging lens may satisfy: 40 < N7 × (d7m + d7s) / EP67 < 80, where 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 distance between the image-side surface of the sixth isolation ring and the object-side surface of the seventh isolation ring along the optical axis, and N7 is the refractive index of the seventh lens. By 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 diameter of the object side and image side of the seventh isolation ring, and the distance between the sixth and seventh isolation rings along the optical axis, thus ensuring better imaging performance. At the same time, it is beneficial to ensure that the thickness and shape of the seventh lens meet the processing requirements and that the seventh lens has better stray light and ghost image performance.

[0054] In an exemplary embodiment, the optical photographic lens according to this application satisfies: (R7-R6) / CP3 > -700, where 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 allows for effective balancing of astigmatism and coma between the third and fourth lenses 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. This results in better image quality for the lens. Furthermore, it helps reduce the lens's sensitivity, effectively avoiding a significant performance drop during assembly due to the relatively high performance sensitivity of the third and fourth lenses, which can be caused by assembly tolerances. This, in turn, improves the lens's yield and manufacturability.

[0055] In an exemplary embodiment, the optical imaging lens according to this application may include a second isolation ring located on the image side of the second lens and 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 in contact with the image side surface of the fourth lens. The optical imaging lens may satisfy: 0 < |f3×EP23| / |f4×EP34| < 5, where 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 surface of the third isolation ring and the object side surface of the fourth isolation ring 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. Satisfying 0 < |f3×EP23| / |f4×EP34| < 5, the spatial distribution between the third and fourth lenses in the lens can be effectively balanced by reasonably controlling the effective focal length of the third and fourth lenses and the distance between the lens edges of the two lenses along the optical axis. This controls the forming thickness of the third and fourth lenses within a reasonable range, improves the assembly stability between the third and fourth lenses, and helps to keep the processing angle of the third and fourth lenses within a reasonable processing range, allowing for a smooth transition of light. This, in turn, can better balance the chromatic aberration and field curvature generated by each lens.

[0056] In an exemplary embodiment, the optical imaging lens according to this application may include a fourth isolation ring located on the image side of the fourth lens and 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 in contact with the image side surface of the fifth lens. The optical imaging lens may satisfy: CT5 / EP45 < 1.5, where EP45 is the distance between the image side surface of the fourth isolation ring and 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. Satisfying CT5 / EP45 < 1.5 allows for reasonable control of the center thickness of the fifth lens on the optical axis and the thickness of the fifth lens between the fourth and fifth isolation rings, ensuring the uniformity of the fifth lens's processing and preventing product defects such as weld lines during the molding process, which could affect the imaging effect. Simultaneously, it also ensures the strength of the fifth lens during assembly, avoiding excessive changes in the assembled shape due to insufficient strength in certain parts of the fifth lens, which could affect lens performance.

[0057] In an exemplary embodiment, the optical photographic lens according to this 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, where 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 allows for reasonable control of the ratio between the effective focal length of the fifth lens and the inner and outer diameters of the object side surface of the fifth isolation ring. This benefits the fifth isolation ring by intercepting excess light, reducing stray light and ensuring imaging quality. Furthermore, it facilitates reasonable control of the step size of the fifth isolation ring in the direction perpendicular to the optical axis, increasing the assembly stability of the lenses before and after the fifth isolation ring, and improving the lens yield and mass production feasibility.

[0058] In an exemplary embodiment, the optical imaging lens according to this application may include a fifth isolation ring located on the image side of the fifth lens and in contact with a portion of the image-side surface of the fifth lens, and a sixth isolation ring located on the image side of the sixth lens and in contact with a portion of the image-side surface of the sixth lens. The optical imaging lens may satisfy: -270 < CP6 / CP5 × R13 / R12 < -5, where 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. By satisfying -270 < CP6 / CP5 × R13 / R12 < -5, the spatial distance between the sixth lens and the front and rear isolation rings, as well as between the fifth and seventh lenses, can be effectively balanced by reasonably controlling the ratio of the maximum thickness of the fifth and sixth isolation rings to the ratio of the curvature radius of the image side of the sixth lens and the object side of the seventh lens. This ensures that the step difference is within a reasonable range, increases the assembly stability of the sixth and seventh lenses, and avoids the problem of poor assembly stability caused by excessive axial step difference between the fifth and sixth isolation rings. At the same time, it can also reasonably limit the curvature radius of the object side and image side of the sixth lens, increase the formability of the sixth lens, and prevent forming defects during the forming process.

[0059] In an exemplary embodiment, the optical imaging lens according to this application may include 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. The optical imaging lens can satisfy: 0.8 < (d6m - d6s) / T67 < 2.5, where 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 and seventh lenses on the optical axis. Satisfying 0.8 < (d6m - d6s) / T67 < 2.5 allows for a reasonable allocation of the space between the sixth and seventh lenses by reasonably controlling the ratio of the difference in inner diameter between the image side and object side surface of the sixth isolation ring to the air gap between the sixth and seventh lenses on the optical axis. This facilitates a more compact space between the sixth and seventh lenses and ensures that the inner diameter difference of the sixth isolation ring is within a reasonable range. This benefits both the miniaturization of the overall lens thickness and the assembly stability of the sixth and seventh lenses.

[0060] In an exemplary embodiment, the optical imaging lens according to this 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 imaging lens may satisfy: 0 ≤ (d5m - d5s) / f6 < 0.3, where 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 allows for effective reduction of lens aberrations and ensures convergence of light rays by reasonably controlling the relationship between the effective focal length of the sixth lens and the inner diameters of the object and image sides of the fifth isolation ring. Simultaneously, by reasonably setting the inner diameters of the object and image sides of the fifth isolation ring, it ensures that the fifth isolation ring has a small step difference, resulting in a small step difference between the fifth lenses and ensuring the assembly stability of the sixth lens. It also effectively blocks edge light rays emitted from the fifth lens, preventing stray light from being generated inside the sixth lens and ensuring the image quality of the lens.

[0061] In an exemplary embodiment, the optical imaging lens according to this application may include: a first isolation ring located on the image side of a first lens and in contact with the image side portion of the first lens; a second isolation ring located on the image side of a second lens and in contact with the image side portion of the second lens; a fourth isolation ring located on the image side of a fourth lens and in contact with the image side portion of the fourth lens; a fifth isolation ring located on the image side of a fifth lens and in contact with the image side portion of the fifth lens; a sixth isolation ring located on the image side of a sixth lens and in contact with the image side portion of the sixth lens; and a seventh isolation ring located on the image side of a seventh lens and in contact with the image side portion of the seventh lens. The optical photographic lens can satisfy: 0.5 < ΣEP / TD < 0.8, where ΣEP is the sum of EP01, EP12, EP23, EP34, EP45, EP56, and EP67; EP01 is the distance along the optical axis between the object-side end of the lens barrel and the object-side surface of the first isolation ring; EP12 is the distance along the optical axis between the image-side surface of the first isolation ring and the object-side surface of the second isolation ring; and EP23 is the distance along the optical axis between the image-side surface of the second isolation ring and the object-side surface of the third isolation ring. EP34 is the distance along the optical axis between the image-side surface of the third isolation ring and the object-side surface of the fourth isolation ring; EP45 is the distance along the optical axis between the image-side surface of the fourth isolation ring and the object-side surface of the fifth isolation ring; EP56 is the distance along the optical axis between the image-side surface of the fifth isolation ring and the object-side surface of the sixth isolation ring; EP67 is the distance along the optical axis between the image-side surface of the sixth isolation ring and the object-side surface of the seventh isolation ring; and TD is the distance along the optical axis between the object-side surface of the first lens and the image-side surface of the seventh lens. Satisfying 0.5 < ΣEP / TD < 0.8 allows for a smaller lens structure length, leading to more miniaturized lenses and reducing their space requirements. It also balances the space distribution between the lenses and isolation rings, improving the uniformity of their distribution, enhancing the overall manufacturability and ease of assembly, and ensuring high yield and production efficiency.

[0062] In an exemplary embodiment, the optical imaging lens according to this application satisfies the following conditions: MR > -75mm and MR is not 0, where MR is the radius of curvature of the imaging surface of the optical imaging lens. Satisfying MR > -75mm and MR not being 0 allows for better matching of the imaging surface radius of the lens with the receiving surface radius of the chip by reasonably controlling the radius of curvature. This avoids field curvature deviation caused by the bending of the chip's receiving surface affecting the image clarity, effectively improving the overall image resolution. It also allows for more chip selection and increases the diversity of lens combinations.

[0063] In an exemplary embodiment, the optical photographic lens according to this application satisfies: f6 > 0mm, f2 < 0mm, and f2 / f6 > -2, where f2 is the effective focal length of the second lens and f6 is the effective focal length of the sixth lens. Satisfying f6 > 0mm, f2 < 0mm, and f2 / f6 > -2 allows for the control of light convergence and trajectory by appropriately matching the effective focal lengths of the second and sixth lenses, reducing lens aberrations and field curvature, and ensuring the lens's imaging resolution. Simultaneously, controlling the ratio of the effective focal lengths of the second and sixth lenses not only facilitates smoother light transitions and reduces the optical sensitivity of the second and sixth lenses, improving lens stability, but also results in better ghosting performance and enhanced image quality.

[0064] In an exemplary embodiment, the optical photographic lens according to this application further includes an aperture stop disposed between the object side and the first lens. Optionally, the optical photographic lens may also include a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface. This application proposes an optical photographic lens with characteristics such as miniaturization, high resolution, and high imaging quality. The optical photographic lens according to the above embodiments of this application can employ multiple lenses, such as the seven lenses mentioned above. By rationally allocating the optical power, surface shape, material, center thickness of each lens, and on-axis spacing between each lens, incident light can be effectively converged, the overall optical length of the optical photographic lens can be reduced, and the manufacturability of the optical photographic lens can be improved, making the optical photographic lens more conducive to production and processing. In the optical photographic lens of the above embodiments of this application, by setting 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, improving the imaging quality of the optical photographic lens.

[0065] The seven-element optical camera lens proposed in the above embodiments of this application, by reasonably setting the forming thickness of each lens and the positional distribution of the later lenses, helps to reduce the space ratio of the lens and achieve lens miniaturization. As the image size of current large-image-plane camera lenses gradually increases, the chip is difficult to guarantee to be flat due to the influence of manufacturing processes. This results in the image plane of the chip itself having a certain curvature, which can easily affect the overall imaging effect of the lens. Therefore, this 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 overall image quality.

[0066] In the embodiments of this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface; that is, 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. The characteristic of an aspherical lens is that its curvature changes continuously from the center to the periphery of the lens. Unlike a spherical lens, which has a constant curvature from the center to the periphery, an aspherical lens has better radius of curvature characteristics, offering advantages in improving distortion aberrations and astigmatism. By using an aspherical lens, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality. Optionally, at least one of the object-side and image-side surfaces of each of the first, second, third, fourth, fifth, sixth, and seventh lenses is an aspherical mirror surface. Optionally, both the object-side and image-side surfaces of each of the first, second, third, fourth, fifth, sixth, and seventh lenses are aspherical mirror surfaces.

[0067] However, those skilled in the art will understand that the number of lenses constituting the optical photographic lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. 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 desired, the optical photographic lens may also include other numbers of lenses.

[0068] The following describes in further detail, with reference to the accompanying drawings, specific embodiments of the optical photographic lens applicable to the above-described embodiments.

[0069] Example 1

[0070] The following is for reference Figures 1A to 2C Describes an optical camera lens according to Embodiment 1 of this application. Figures 1A to 1C The optical camera lenses in three different implementations of Example 1 are shown respectively.

[0071] like Figures 1A to 1C As shown, the optical camera lens includes, from the object side to the image side, the following components in sequence: aperture STO (not shown), first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter (not shown), and imaging plane (not shown).

[0072] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The imaging surface S17 of the optical lens is convex. The filter has an object-side surface S15 and an image-side surface S16. Light from the object passes through 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 camera lens of Example 1, where the units for 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 camera lens is 7.24 mm.

[0077] like Figures 1A to 1C As shown, the optical camera lens may include seven isolation rings: 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, as well as the first isolation rings P1 to the seventh isolation rings P7.

[0078] Tables 2-1 and 2-2 show the basic parameters of each isolation ring under three implementations of the optical photographic lens of Example 1, wherein the unit of each basic parameter is millimeters (mm).

[0079]

[0080] Table 2-1

[0081]

[0082] Table 2-2

[0083] It should be understood that this example only exemplifies the structure and parameters of each isolation ring under three implementation methods, and does not explicitly limit the specific structure and actual parameters of each isolation ring. In actual production, the specific structure and actual parameters of each isolation ring can be set in any suitable manner.

[0084] In Embodiment 1, the object-side surface and image-side surface of any one of the first lens E1 to the seventh lens E7 are aspherical surfaces, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0085]

[0086] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Tables 3-1 and 3-2 below give the higher-order coefficients A4, A6, A8, A14 that can be used for each aspherical mirror S1-S14 in Example 1. 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 on-axis chromatic aberration curve of the optical camera lens of Embodiment 1 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the optical camera lens. Figure 2B The astigmatism curve of the optical camera lens of Embodiment 1 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 2C The distortion curve of the optical camera lens of Embodiment 1 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 2A to 2C It can be seen that the optical camera lens given in Example 1 can achieve good imaging quality.

[0093] Example 2

[0094] The following is for reference Figures 3A to 4CThis application describes an optical photographic lens according to Embodiment 2. For the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted in this embodiment and the following embodiments. Figures 3A to 3C The optical camera lenses in three different implementations of Example 1 are shown respectively.

[0095] like Figures 3A to 3C As shown, the optical camera lens includes, from the object side to the image side, the following components in sequence: aperture STO (not shown), first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter (not shown), and imaging plane (not shown).

[0096] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being concave. The fourth lens E4 has positive optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The imaging surface S17 of the optical lens is convex. The filter has an object-side surface S15 and an image-side surface S16. Light from the object passes through 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 camera lens is 6.51 mm.

[0098] like Figures 3A to 3C As shown, the optical camera lens may include seven isolation rings: 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, as well as the first isolation rings P1 to the seventh isolation rings P7.

[0099] It should be understood that this example only exemplifies the structure and parameters of each isolation ring under three implementation methods, and does not explicitly limit the specific structure and actual parameters of each isolation ring. In actual production, the specific structure and actual parameters of each isolation ring can be set in any suitable manner.

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

[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 on-axis chromatic aberration curve of the optical camera lens of Embodiment 2 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the optical camera lens. Figure 4B The astigmatism curve of the optical camera lens of Embodiment 2 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 4C The distortion curve of the optical camera lens of Embodiment 2 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 4A to 4C It can be seen that the optical camera lens given in Example 2 can achieve good imaging quality.

[0112] Example 3

[0113] The following is for reference Figures 5A to 6C Describes an optical camera lens according to Embodiment 3 of this application. Figures 5A to 5C The optical camera lenses in three different implementations of Example 3 are shown respectively.

[0114] like Figures 5A to 5CAs shown, the optical camera lens includes, from the object side to the image side, the following components in sequence: aperture STO (not shown), first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter (not shown), and imaging plane (not shown).

[0115] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has negative optical power, with its object-side surface S5 being concave and its image-side surface S6 being convex. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The imaging surface S17 of the optical lens is convex. The filter has an object-side surface S15 and an image-side surface S16. Light from the object passes through 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 camera lens is 7.19 mm.

[0117] like Figures 5A to 5C As shown, the optical camera lens may include seven isolation rings: 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, as well as the first isolation rings P1 to the seventh isolation rings P7.

[0118] It should be understood that this example only exemplifies the structure and parameters of each isolation ring under three implementation methods, and does not explicitly limit the specific structure and actual parameters of each isolation ring. In actual production, the specific structure and actual parameters of each isolation ring can be set in any suitable manner.

[0119] Table 7 shows the basic parameters of the optical photographic lens of Embodiment 3, wherein the units of radius of curvature, thickness / distance, and focal length are millimeters (mm). Tables 8-1 and 8-2 show the basic parameters of the isolation rings in the three embodiments of the optical photographic lens of Embodiment 3, wherein the units of each basic parameter are millimeters (mm). Tables 9-1 and 9-2 show the higher-order coefficients that can be used for each aspherical mirror in Embodiment 3, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[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] Figure 6A The on-axis chromatic aberration curve of the optical camera lens of Embodiment 3 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the optical camera lens. Figure 6B The astigmatism curve of the optical camera lens of Embodiment 3 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 6C The distortion curve of the optical camera lens of Embodiment 3 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 6A to 6C It can be seen that the optical camera lens given in Example 3 can achieve good image quality.

[0133] Example 4

[0134] The following is for reference Figures 7A to 8C Describes an optical camera lens according to Embodiment 4 of this application. Figures 7A to 7C The optical camera lenses in three different implementations of Example 4 are shown respectively.

[0135] like Figures 7A to 7C As shown, the optical camera lens includes, from the object side to the image side, the following components in sequence: aperture STO (not shown), first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, seventh lens E7, filter (not shown), and imaging plane (not shown).

[0136] The first lens E1 has positive optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being convex and its image-side surface S4 being concave. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S7 being convex and its image-side surface S8 being concave. The fifth lens E5 has negative optical power, with its object-side surface S9 being convex and its image-side surface S10 being concave. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being concave. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The imaging surface S17 of the optical camera lens is concave. The filter has an object-side surface S15 and an image-side surface S16. Light from the object passes through 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 camera lens is 6.21 mm.

[0138] like Figures 7A to 7C As shown, the optical camera lens may include seven isolation rings: 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, as well as the first isolation rings P1 to the seventh isolation rings P7.

[0139] It should be understood that this example only exemplifies the structure and parameters of each isolation ring under three implementation methods, and does not explicitly limit the specific structure and actual parameters of each isolation ring. In actual production, the specific structure and actual parameters of each isolation ring can be set in any suitable manner.

[0140] Table 10 shows the basic parameters of the optical photographic lens of Embodiment 4, wherein the units of radius of curvature, thickness / distance, and focal length are all millimeters (mm). Tables 11-1 and 11-2 show the basic parameters of each isolation ring in the three embodiments of the optical photographic lens of Embodiment 4, wherein the units of each basic parameter are all millimeters (mm). Tables 12-1 and 12-2 show the higher-order coefficients that can be used for each aspherical mirror in Embodiment 4, wherein each aspherical surface shape can be defined by formula (1) given in Embodiment 1 above.

[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] Figure 8A The on-axis chromatic aberration curve of the optical camera lens of Embodiment 4 is shown, which represents the deflection of the focal point of light of different wavelengths after passing through the optical camera lens. Figure 8B The astigmatism curve of the optical camera lens of Embodiment 4 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 8C The distortion curve of the optical camera lens of Example 4 is shown, representing the distortion magnitude values ​​corresponding to different image heights. According to... Figures 8A to 8C It can be seen that the optical camera lens given in Example 4 can achieve good image 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] This application also provides an imaging device, whose electronic photosensitive element can be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device can be a stand-alone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical photographic lens described above.

[0165] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical photographic lens characterized in that, Comprising: a lens group comprising, in order from the object side to the image side along an optical axis, a first lens having a refractive power, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens having a refractive power, wherein the first lens and the sixth lens have positive refractive power, the second lens and the seventh lens have negative refractive power, one of the third lens, the fourth lens, and the fifth lens has positive refractive power, and the other two have negative refractive power; the number of lenses having refractive power in the optical photographic lens is seven; a plurality of spacer rings comprising: a second spacer ring located on the image side of the second lens and partially in contact with the image side surface of the second lens, a third spacer ring located on the image side of the third lens and partially in contact with the image side surface of the third lens, a fourth spacer ring located on the image side of the fourth lens and partially in contact with the image side surface of the fourth lens, a fifth spacer ring located on the image side of the fifth lens and partially in contact with the image side surface of the fifth lens, a sixth spacer 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 spacer ring located on the image side of the seventh lens and partially in contact with the image side surface of the seventh lens; and a lens barrel for accommodating the lens group and the plurality of spacer rings; wherein the optical photographic lens satisfies: 45.42 ≤ N7 × (d7m + d7s) / EP67 ≤ 72.76, 0.42 ≤ |f3 × EP23| / |f4 × EP34| ≤ 3.93, -254.88 ≤ CP6 / CP5 × R13 / R12 ≤ -11.27, and -1.44 ≤ f2 / f6 ≤ -0.98, wherein d7m is the inner diameter of the image side surface of the seventh spacer ring, d7s is the inner diameter of the object side surface of the seventh spacer ring, EP67 is the interval distance from the image side surface of the sixth spacer ring to the object side surface of the seventh spacer ring in the direction along the optical axis, N7 is the refractive index of the seventh lens, EP23 is the interval distance from the image side surface of the second spacer ring to the object side surface of the third spacer ring in the direction along the optical axis, EP34 is the interval distance from the image side surface of the third spacer ring to the object side surface of the fourth spacer ring in the direction along the optical axis, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, CP5 is the maximum thickness of the fifth spacer ring, CP6 is the maximum thickness of the sixth spacer ring, R12 is the radius of curvature of the image side surface of the sixth lens, R13 is the radius of curvature of the object side surface of the seventh lens, f2 is the effective focal length of the second lens, and f6 is the effective focal length of the sixth lens.

2. The optical photographic lens according to claim 1, characterized in that, The optical photographing lens satisfies: 6.63mm≤|f45×d5m / D5m×d3s / D3s|≤168.82mm, wherein d5m is an inner diameter of an image side surface of the fifth spacer ring, D5m is an outer diameter of the image side surface of the fifth spacer ring, d3s is an inner diameter of an object side surface of the third spacer ring, D3s is an outer diameter of the object side surface of the third spacer ring, and f45 is a combined focal length of the fourth lens and the fifth lens.

3. The optical photographing lens according to claim 1, characterized in that, The optical photographing lens satisfies: 0.99≤N5 / N6×T56 / CP5≤28.63, wherein N5 is a refractive index of the fifth lens, N6 is a refractive index of the sixth lens, and T56 is an air interval of the fifth lens and the sixth lens on the optical axis.

4. The optical photographing lens according to claim 1, characterized in that, The optical photographing lens satisfies: -697.26≤(R7-R6) / CP3≤14499.97, wherein CP3 is a maximum thickness of the third spacer ring, R6 is a curvature radius of an image side surface of the third lens, and R7 is a curvature radius of an object side surface of the fourth lens.

5. The optical photographing lens according to claim 1, characterized in that, The optical photographing lens satisfies: 0.57≤CT5 / EP45≤1.21, wherein EP45 is a separation distance of an image side surface of the fourth spacer ring to an object side surface of the fifth spacer ring in a direction along the optical axis, and CT5 is a central thickness of the fifth lens on the optical axis.

6. The optical photographing lens according to claim 1, characterized in that, The optical photographing lens satisfies: 2.11≤|f5| / (D5s+d5s)≤70.83, wherein D5s is an outer diameter of an object side surface of the fifth spacer ring, d5s is an inner diameter of the object side surface of the fifth spacer ring, and f5 is an effective focal length of the fifth lens.

7. The optical photographing lens according to claim 1, characterized in that, The optical photographing lens satisfies: 1.03≤(d6m-d6s) / T67≤2.00, wherein d6m is an inner diameter of an image side surface of the sixth spacer ring, d6s is an inner diameter of an object side surface of the sixth spacer ring, and T67 is an air interval of the sixth lens and the seventh lens on the optical axis.

8. The optical photographing lens according to claim 1, characterized in that, The optical photographing lens satisfies: 0≤(d5m-d5s) / f6≤0.21, wherein d5s is an inner diameter of an object side surface of the fifth spacer ring, and d5m is an inner diameter of an image side surface of the fifth spacer ring.

9. The photographic optical lens according to claim 1, characterized in that, The plurality of spacer rings further comprises: a first spacer ring located on an image side of the first lens and partially in contact with an image side surface of the first lens; The optical photographic lens satisfies: 0.58≤∑EP / TD≤0.72, where ∑EP is the sum of EP01, EP12, EP23, EP34, EP45, EP56 and EP67, EP01 is the interval distance in the direction along the optical axis from the object side end of the lens barrel to the object side surface of the first isolation ring, EP12 is the interval distance in the direction along the optical axis from the image side surface of the first isolation ring to the object side surface of the second isolation ring, EP45 is the interval distance in the direction along the optical axis from the image side surface of the fourth isolation ring to the object side surface of the fifth isolation ring, EP56 is the interval distance in the direction along the optical axis from the image side surface of the fifth isolation ring to the object side surface of the sixth isolation ring, and TD is the interval distance on the optical axis from the object side surface of the first lens to the image side surface of the seventh lens.

10. The optical photographic lens according to claim 9, wherein The optical photographic lens satisfies: 1.01≤|(D3m+d3m) / (D3m-d3m)×R5 / R6|≤120.82, 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.

11. The photographic optical lens according to any of claims 1 to 10, characterized in that, The optical photographic lens satisfies: -70 mm≤MR≤129.17 mm, and MR is not 0, where MR is the radius of curvature of the imaging surface of the optical photographic lens.

12. The photographic optical lens according to any of claims 1 to 10, wherein, The optical photographic lens satisfies: 8.74 mm < f6≤ 11.35 mm, -13.76 mm≤f2< -10.95 mm.

13. The optical photographic lens according to any one of claims 1-10, wherein the object side surface of the first lens is convex, and the image side surface is concave; the object side surface of the second lens is convex, and the image side surface is concave; the object side surface of the fourth lens is convex, and the image side surface is concave; the object side surface of the fifth lens is convex, and the image side surface is concave; the object side surface of the sixth lens is convex, and the image side surface is concave; and the object side surface of the seventh lens is concave, and the image side surface is concave.

Images