CN218824940U - Optical imaging lens - Google Patents
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- CN218824940U CN218824940U CN202222511045.8U CN202222511045U CN218824940U CN 218824940 U CN218824940 U CN 218824940U CN 202222511045 U CN202222511045 U CN 202222511045U CN 218824940 U CN218824940 U CN 218824940U
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Abstract
The application discloses an optical imaging lens. The optical imaging lens includes a lens group, a plurality of spacing elements, and a lens barrel for accommodating the lens group and the plurality of spacing elements. The lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which have focal power in sequence from an object side to an image side along an optical axis, wherein the first lens has positive focal power; the second lens has a negative power. A plurality of spacer elements including a third spacer element between the third lens and the fourth lens and a fourth spacer element between the fourth lens and the fifth lens. The optical imaging lens satisfies: 5.0 < | (R7 + R5)/(D4 m-D3 m) | < 31.5, where R5 is the radius of curvature of the object-side surface of the third lens, R7 is the radius of curvature of the object-side surface of the fourth lens, D3m is the outer diameter of the image-side surface of the third spacing element, and D4m is the outer diameter of the image-side surface of the fourth spacing element.
Description
Technical Field
The application relates to the field of optical elements, in particular to an optical imaging lens.
Background
With the continuous expansion of the global mobile phone market, various functions of the mobile phone are continuously improved, and the demand of users for photographing by using the mobile phone is increasing. Meanwhile, users put forward higher requirements on the photographing performance of the mobile phone in different scenes, so that the requirements of the mobile phone industry on software and hardware loaded on the mobile phone become higher and higher. In order to improve the competitiveness of products of all smart phone manufacturers, the manufacturers of the smart phones put forward higher design requirements on optical imaging lenses carried on the smart phones.
In the field of optical imaging lenses, the existence of stray light phenomenon and the deviation of assembly stability seriously affect the imaging quality of the imaging lens. For example, in general, when the optical power of each lens in the optical imaging lens is set to be not appropriate, the deflection path of the light in the optical imaging lens may be disordered, and stray light may be generated. On the other hand, if the position of the spacer element in the optical imaging lens is not designed properly, the deflection path of the light in the optical imaging lens may be disordered, and thus the stray light is easily generated. In addition, if the positions of the spacer elements in the optical imaging lens are not designed reasonably, the stability between the lenses may be poor, and the assembling stability and the yield of the optical imaging lens may be poor.
Therefore, how to reasonably arrange the lenses and the spacing elements in the optical imaging lens, reasonably set the optical parameters of the optical imaging lens and the like so as to control the light trend in the optical imaging lens and optimize the assembly stability of the optical imaging lens, and improve the reliability and yield of the optical imaging lens is one of the problems to be solved in the optical imaging field.
SUMMERY OF THE UTILITY MODEL
An aspect of the present application provides an optical imaging lens including a lens group, a plurality of spacing elements, and a lens barrel for accommodating the lens group and the plurality of spacing elements. The lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which have focal power in sequence from an object side to an image side along an optical axis, wherein the first lens has positive focal power; the second lens has a negative power. A plurality of spacer elements including a third spacer element positioned between the third lens and the fourth lens and in contact with an image-side surface portion of the third lens and a fourth spacer element positioned between the fourth lens and the fifth lens and in contact with an image-side surface portion of the fourth lens. The optical imaging lens satisfies: 5.0 < | (R7 + R5)/(D4 m-D3 m) | < 31.5, wherein R5 is a radius of curvature of an object-side surface of the third lens, R7 is a radius of curvature of an object-side surface of the fourth lens, D3m is an outer diameter of an image-side surface of the third spacing element, and D4m is an outer diameter of an image-side surface of the fourth spacing element.
In one embodiment, at least one mirror surface of the object side surface of the first lens to the image side surface of the fifth lens is an aspherical mirror surface.
In one embodiment, the optical imaging lens may satisfy: 2mm 2 ＜R1×R4＜19.5mm 2 Where R1 is a radius of curvature of the object-side surface of the first lens element, and R4 is a radius of curvature of the image-side surface of the second lens element.
In one embodiment, the optical imaging lens may satisfy: -5.0 < f3/f5 < 4.0, wherein f3 is the effective focal length of the third lens and f5 is the effective focal length of the fifth lens.
In one embodiment, the plurality of spacer elements may further include a second spacer element positioned between the second lens and the third lens and in contact with the image-side portion of the second lens, N first auxiliary spacer elements positioned between the second spacer element and the third lens; and F second auxiliary spacing elements positioned between the third spacing element and the fourth lens, wherein N + F is more than or equal to 0 and less than 4.
In one embodiment, the plurality of spacer elements may further include a first spacer element located between the first lens and the second lens and in contact with the image-side surface portion of the first lens, and the optical imaging lens may satisfy: 4.5 < (D4 m-D1 m)/(T45-T12) < 18.5, wherein D4m is an outer diameter of an image side surface of the fourth spacing element, D1m is an inner diameter of the image side surface of the first spacing element, T45 is an air space of the fourth lens and the fifth lens on the optical axis, and T12 is an air space of the first lens and the second lens on the optical axis.
In one embodiment, the optical imaging lens may satisfy: 1.0 < (R4 + R1)/(D2 m-D1 s) < 25.2, wherein R1 is the radius of curvature of the object-side surface of the first lens, R4 is the radius of curvature of the image-side surface of the second lens, D2m is the outer diameter of the image-side surface of the second spacer element, and D1s is the inner diameter of the object-side surface of the first spacer element.
In one embodiment, the optical imaging lens may satisfy: 1.5 < (D2 m-D1 m)/T12 < 30.0, wherein D2m is the outer diameter of the image side surface of the second spacer element, D1m is the inner diameter of the image side surface of the first spacer element, and T12 is the air space on the optical axis between the first lens and the second lens.
In one embodiment, the optical imaging lens may satisfy: 2.5 < (D3 m + D2 m)/(CT 3+ T34) < 11.7, wherein D3m is the outer diameter of the image-side surface of the third spacer element, D2m is the outer diameter of the image-side surface of the second spacer element, CT3 is the center thickness of the third lens on the optical axis, and T34 is the air space between the third lens and the fourth lens on the optical axis.
In one embodiment, the optical imaging lens may satisfy: 4.5 < D0 s/Sigma CT + TD/EPmax < 12.0, where D0s is an outer diameter of an object side end of the lens barrel, sigma CT is a sum of central thicknesses of all the first lens to the fifth lens on an optical axis, TD is a spacing distance of an object side surface of the first lens to an image side surface of the fifth lens on the optical axis, and EPmax is a maximum value of the spacing distance of any two adjacent spacing elements among the first spacing element to the fourth spacing element in a direction along the optical axis.
In one embodiment, the optical imaging lens may satisfy: 3.5 < f/TD + D0 s/Sigma CP < 85.0, wherein f is the total effective focal length of the optical imaging lens, TD is the spacing distance between the object side surface of the first lens and the image side surface of the fifth lens on the optical axis, D0s is the outer diameter of the object side end of the lens barrel, and Sigma CP is the sum of the maximum thicknesses of the spacing elements in the first spacing element to the fourth spacing element.
In one embodiment, the optical imaging lens may satisfy: -2.5 < (f 1+ f 3)/(D3 m-D1 s) < 30.5, wherein f1 is the effective focal length of the first lens, f3 is the effective focal length of the third lens, D3m is the outer diameter of the image side surface of the third spacer element, and D1s is the inner diameter of the object side surface of the first spacer element.
In one embodiment, the optical imaging lens may satisfy: 5.0 < D0s/EP01+ ∑ CT/CT4 < 13.0, wherein D0s is an outer diameter of an object side end of the lens barrel, EP01 is a distance between the object side end of the lens barrel and an object side surface of the first spacing element along an optical axis, Σ CT is a sum of central thicknesses of all the first lens to the fifth lens on the optical axis, and CT4 is a central thickness of the fourth lens on the optical axis.
In one embodiment, the optical imaging lens may satisfy: 2.5 < | f 45/(D4 s-D3 m) | < 13.5, wherein f45 is the combined focal length of the fourth and fifth lenses, D4s is the outer diameter of the object-side surface of the fourth spacing element, and D3m is the inner diameter of the image-side surface of the third spacing element.
In one embodiment, the optical imaging lens may satisfy: 3.5 < D4s/EP34+ CT4/CT3 < 13.5, wherein D4s is the outer diameter of the object-side face of the fourth spacer element, EP34 is the spacing distance of the third spacer element and the fourth spacer element in the direction along the optical axis, CT3 is the central thickness of the third lens on the optical axis, and CT4 is the central thickness of the fourth lens on the optical axis.
In one embodiment, the optical imaging lens may satisfy: 1.0 < (TD-T34)/(∑ EP- Σ CP) < 42.5, wherein TD is an interval distance on the optical axis from the object side surface of the first lens to the image side surface of the fifth lens, T34 is an air interval on the optical axis from the third lens and the fourth lens, Σ EP is a sum of interval distances in a direction along the optical axis from any adjacent two of the first to fourth spacing elements, and Σ CP is a sum of maximum thicknesses of the respective spacing elements in the first to fourth spacing elements.
In one embodiment, the optical imaging lens may satisfy: 14.4mm -1 ＜(V3+V4)/(D4s-d3m)＜36.5mm -1 Where V3 is the abbe number of the third lens, V4 is the abbe number of the fourth lens, D4s is the outer diameter of the object-side surface of the fourth spacer element, and D3m is the inner diameter of the image-side surface of the third spacer element.
In the exemplary embodiment of the application, in the design process of the five-piece type miniaturized lens, by reasonably controlling the focal power of each lens, if the first lens has positive focal power and the second lens has negative focal power, the aberration can be well balanced, and the lens can achieve a better image quality effect. Illustratively, by providing a plurality of spacing elements between the first lens and the fifth lens, such as a third spacing element between the third lens and the fourth lens, and a fourth spacing element between the fourth lens and the fifth lens, it is beneficial to effectively control the overall height of the lens while ensuring high imaging quality of the lens, so as to achieve miniaturization of the lens. Illustratively, the optical imaging lens meets the requirement that 5.0 < | (R7 + R5)/(D4 m-D3 m) | < 31.5, which is beneficial to reasonably setting the shapes of the third lens and the fourth lens, reducing the tolerance sensitivity of the third lens and the fourth lens, effectively improving the light convergence, reducing the forming limit process of the third lens and the fourth lens, reducing the influence of the forming surface type difference of the third lens and the fourth lens on imaging, further being beneficial to improving the yield and the yield MTF of the lens in the assembling production process, and also being beneficial to reasonably setting the outer diameters of the image side surfaces of the third spacing element and the fourth spacing element, so that the lens end has smaller assembling section difference and the image side of the spacing element is reasonably set, and the stability of the lens can be improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1A and 1B respectively show structural schematic views of a lens barrel, a lens group, and each spacer element in two embodiments in the optical imaging lens of example 1;
fig. 2A to 2D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the optical imaging lens of embodiment 1, respectively;
fig. 3A and 3B respectively show structural schematic diagrams of a lens barrel, a lens group, and each spacing element in two embodiments in the optical imaging lens of example 2;
fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 2;
fig. 5A and 5B are schematic structural views showing lens barrels, lens groups, and respective spacing elements in two embodiments in the optical imaging lens of example 3, respectively;
fig. 6A to 6D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve of the optical imaging lens of embodiment 3, respectively;
fig. 7A and 7B are schematic structural views showing lens barrels, lens groups, and respective spacing elements in two embodiments in the optical imaging lens of example 4, respectively;
fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 4; and
fig. 9 shows a partial parameter schematic diagram of an optical imaging lens according to an embodiment of the present application.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens, and the first spacing element may also be referred to as the second spacing element or the third spacing element, without departing from the teachings of the present application.
In the drawings, the thickness, size and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale. It is to be understood that the thickness, size and shape of the spacing elements and lens barrel have also been slightly exaggerated in the drawings for ease of illustration.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position 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 concave position 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 object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens. It will be understood that the surface of each spacer element closest to the subject is referred to as the object side surface of the spacer element, and the surface of each spacer element closest to the image plane is referred to as the image side surface of the spacer element. The surface of the lens barrel closest to the object 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.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The following examples merely represent several embodiments of the present application, which are described in more detail and detail, but are not to be construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, it is possible to make several variations and modifications without departing from the concept of the present application, which all fall within the protection scope of the present application, for example, the lens groups (i.e. the first lens to the fifth lens), the barrel structure and the spacing element in the embodiments of the present application may be combined arbitrarily, and the lens group in one embodiment is not limited to be combined only with the barrel structure, the spacing element and the like of the embodiment. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The features, principles, and other aspects of the present application are described in detail below.
An optical imaging lens according to an exemplary embodiment of the present application may include a lens group, a plurality of spacing elements, and a lens barrel for accommodating the lens group and the plurality of spacing elements. The lens group may include five lenses having optical powers, which are a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, respectively. The five lenses are arranged along the optical axis in sequence from the object side to the image side. Any adjacent two lenses of the first lens to the fifth lens can have a spacing distance therebetween. The barrel may have a plurality of steps inside for each spacer element and each lens to bear against.
According to exemplary embodiments of the present application, each of the first to fifth lenses may have an optical area for optical imaging and a non-optical area extending outward from an outer periphery of the optical area. In general, an optical region refers to a region of a lens for optical imaging, and a non-optical region is a structural region of the lens. In the assembling process of the optical imaging lens, a spacing element can be arranged at the non-optical area of each lens and the lenses are respectively leaned into the lens barrel. In the imaging process of the optical imaging lens, the optical area of each lens can transmit light from an object to form an optical path, and a final optical image is formed. It should be noted that for ease of description, the present application describes each lens as being divided into two portions, an optical region and a non-optical region, but it should be understood that both the optical region and the non-optical region of the lens are formed as one piece during the manufacturing process, rather than as separate two portions.
An optical imaging lens according to an exemplary embodiment of the present application may include four spacer elements, a first spacer element, a second spacer element, a third spacer element, and a fourth spacer element, between the first lens to the fifth lens, respectively. In particular, the optical imaging lens may include a first spacer element between the first lens and the second lens, which may abut against a non-optical region of an image side surface of the first lens; a second spacer element between the second lens and the third lens abuttable against a non-optical region of an image side surface of the second lens; a third spacing element between the third lens and the fourth lens, the third spacing element being abuttable against a non-optical region of an image-side surface of the third lens; and a fourth spacing element between the fourth lens and the fifth lens, the fourth spacing element being abuttable against a non-optical region of an image-side surface of the fourth lens. Illustratively, the first spacer element may be in contact with a non-optical region of the image side surface of the first lens, while being in contact with a non-optical region of the object side surface of the second lens. For example, the object side surface of the first spacer element may contact a non-optical region of the image side surface of the first lens, and the image side surface of the first spacer element may contact a non-optical region of the object side surface of the second lens; by analogy, the object-side face of the fourth spacer element may be in contact with the non-optical area of the image-side face of the fourth lens, and the image-side face of the fourth spacer element may be in contact with the non-optical area of the object-side face of the fifth lens. The optical imaging lens is provided with the plurality of spacing elements and is carried on the inner wall of the lens barrel, so that the performance, stability, yield and imaging quality of the optical imaging lens are improved.
According to the exemplary embodiments of the present application, by providing a plurality of spacer elements between the first lens and the fifth lens, such as providing the first spacer element between the first lens and the second lens, providing the second spacer element between the second lens and the third lens, providing the third spacer element between the third lens and the fourth lens, and providing the fourth spacer element between the fourth lens and the fifth lens, it is advantageous that while ensuring that the lens has high imaging quality, the overall height of the lens can be effectively controlled to achieve miniaturization of the lens.
According to an exemplary embodiment of the present application, the first lens may have a positive optical power; the second lens may have a negative optical power; the third lens may have a positive optical power or a negative optical power; the fourth lens may have a positive power or a negative power; and the fifth lens may have a positive power or a negative power. This application is favorable to balancing the aberration betterly through the focal power of each lens among the reasonable collocation optical imaging lens, makes the camera lens reach the image quality effect of preferred.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 5.0 < | (R7 + R5)/(D4 m-D3 m) | < 31.5, wherein R5 is a radius of curvature of an object-side surface of the third lens, R7 is a radius of curvature of an object-side surface of the fourth lens, D3m is an outer diameter of an image-side surface of the third spacing element, and D4m is an outer diameter of an image-side surface of the fourth spacing element. Satisfy 5.0 < | (R7 + R5)/(D4 m-D3 m) | < 31.5, both be favorable to rationally setting up the shape of third lens, fourth lens, reduce its tolerance sensitivity, effectively improve the convergence of light, reduce the shaping limit technology of third lens and fourth lens, reduce the influence of the shaping face type difference of third lens and fourth lens to the formation of image, and then be favorable to promoting the assemblage production process yield and the MTF yield of camera lens, still be favorable to rationally setting up the external diameter of third interval component and fourth interval component image side face, can let the camera lens image side end have less assemblage section difference and interval component external diameter reasonable setting can increase the stability of camera lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2mm 2 ＜R1×R4＜19.5mm 2 Where R1 is a radius of curvature of the object-side surface of the first lens element, and R4 is a radius of curvature of the image-side surface of the second lens element. Satisfies 2mm 2 ＜R1×R4＜19.5mm 2 The lens is beneficial to the molding of the first lens and the second lens, and the improvement of the convergence of light rays, so that the lens has higher imaging quality.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -5.0 < f3/f5 < 4.0, wherein f3 is the effective focal length of the third lens and f5 is the effective focal length of the fifth lens. . The requirements that f3/f5 is more than-5.0 and less than 4.0 are met, and the long-focus lens has the characteristics of long focus, good imaging definition and the like.
In an exemplary embodiment, the plurality of spacer elements may further include N first auxiliary spacer elements located between the second spacer element and the third lens; and F second auxiliary spacing elements positioned between the third spacing element and the fourth lens, wherein N + F is more than or equal to 0 and less than 4. The arrangement can improve the assembly stability of the lens and eliminate the risk of newly increased stray light caused by baking deformation of at least one spacer.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 4.5 < (D4 m-D1 m)/(T45-T12) < 18.5, wherein D4m is an outer diameter of an image side surface of the fourth spacing element, D1m is an inner diameter of the image side surface of the first spacing element, T45 is an air space of the fourth lens and the fifth lens on the optical axis, and T12 is an air space of the first lens and the second lens on the optical axis. Satisfies the condition that (D4 m-D1 m)/(T45-T12) is less than 4.5 and less than 18.5, can effectively reduce the radial segment difference of each lens and spacing element and improve the reliability of the lens.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.0 < (R4 + R1)/(D2 m-D1 s) < 25.2, wherein R1 is the radius of curvature of the object-side surface of the first lens, R4 is the radius of curvature of the image-side surface of the second lens, D2m is the outer diameter of the image-side surface of the second spacer element, and D1s is the inner diameter of the object-side surface of the first spacer element. Satisfy 1.0 < (R4 + R1)/(D2 m-D1 s) < 25.2, be favorable to controlling the face type of first lens and second lens and the radial distance that the two is perpendicular to the optical axis, and then be favorable to controlling the size of camera lens front end size.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.5 < (D2 m-D1 m)/T12 < 30.0, wherein D2m is the outer diameter of the image-side surface of the second spacer element, D1m is the inner diameter of the image-side surface of the first spacer element, and T12 is the air space on the optical axis between the first lens and the second lens. Satisfying 1.5 < (D2 m-D1 m)/T12 < 30.0, not only improving the assembly stability of the first lens and the second lens, but also enabling the first spacing element and the second spacing element to better shield stray light, so that the lens can obtain higher imaging quality.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2.5 < (D3 m + D2 m)/(CT 3+ T34) < 11.7, wherein D3m is the outer diameter of the image-side surface of the third spacer element, D2m is the outer diameter of the image-side surface of the second spacer element, CT3 is the center thickness of the third lens on the optical axis, and T34 is the air space between the third lens and the fourth lens on the optical axis. Satisfy 2.5 < (D3 m + D2 m)/(CT 3+ T34) < 11.7, both can make second interval component and third interval component shelter from the miscellaneous light effectively, can reduce the camera lens sensitivity again, can also make each component non-deformable, the reliance is better.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 4.5 < D0 s/Sigma CT + TD/EPmax < 12.0, where D0s is an outer diameter of an object side end of the lens barrel, sigma CT is a sum of central thicknesses of all the first lens to the fifth lens on an optical axis, TD is a spacing distance of an object side surface of the first lens to an image side surface of the fifth lens on the optical axis, and EPmax is a maximum value of the spacing distance of any two adjacent spacing elements among the first spacing element to the fourth spacing element in a direction along the optical axis. The requirements that D0 s/sigma CT + TD/EPmax is more than 4.5 and less than 12.0 are met, the height of the lens, the thickness of each lens and the outer diameters of two ends of the lens are controlled within a certain range, the miniaturization of the lens is facilitated, the internal space of the lens can be reasonably distributed, and the lens has the characteristics of high image quality and lightness and thinness.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 3.5 < f/TD + D0 s/Sigma CP < 85.0, wherein f is the total effective focal length of the optical imaging lens, TD is the spacing distance between the object side surface of the first lens and the image side surface of the fifth lens on the optical axis, D0s is the outer diameter of the object side end of the lens barrel, and Sigma CP is the sum of the maximum thicknesses of the spacing elements in the first spacing element to the fourth spacing element. More specifically, f, TD, D0s and Σ CP may further satisfy: 55.0 < f/TD + D0 s/sigma CP < 85.0. The lens meets the requirement that f/TD + D0 s/sigma CP is more than 3.5 and less than 85.0, is favorable for setting the outer diameter of the object side end of the lens barrel and the thickness of the spacing element within a certain range, and has the characteristics of long focal length, capability of shooting distant scenes, clear imaging and small overall dimension.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: -2.5 < (f 1+ f 3)/(D3 m-D1 s) < 30.5, wherein f1 is the effective focal length of the first lens, f3 is the effective focal length of the third lens, D3m is the outer diameter of the image side surface of the third spacer element, and D1s is the inner diameter of the object side surface of the first spacer element. More specifically, f1, f3, D3m, and D1s may further satisfy: 5.0 < (f 1+ f 3)/(D3 m-D1 s) < 30.5. Satisfy-2.5 < (f 1+ f 3)/(D3 m-D1 s) < 30.5, not only be favorable to making the camera lens have good optical performance, be favorable to improving the stability of assemblage of first lens to third lens again.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 5.0 < D0s/EP01+ ∑ CT/CT4 < 13.0, wherein D0s is an outer diameter of an object side end of the lens barrel, EP01 is a distance between the object side end of the lens barrel and an object side surface of the first spacing element along an optical axis, Σ CT is a sum of central thicknesses of all the first lens to the fifth lens on the optical axis, and CT4 is a central thickness of the fourth lens on the optical axis. The requirement that D0s/EP01+ ∑ CT/CT4 is more than 5.0 and less than 13.0 is met, the external dimension of the lens cone and the central thickness of each lens in the lens cone are favorably set in a reasonable range, the internal space distribution of the lens is more reasonable, and the performance of the lens is favorably improved.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 2.5 < | f 45/(D4 s-D3 m) | < 13.5, wherein f45 is the combined focal length of the fourth and fifth lenses, D4s is the outer diameter of the object-side surface of the fourth spacing element, and D3m is the inner diameter of the image-side surface of the third spacing element. Satisfy 2.5 < | f 45/(D4 s-D3 m) | < 13.5, not only be favorable to making the camera lens obtain better image quality, be favorable to again reducing the camera lens sensitivity, promote whole reliance.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 3.5 < D4s/EP34+ CT4/CT3 < 13.5, wherein D4s is the outer diameter of the object-side face of the fourth spacer element, EP34 is the spacing distance of the third spacer element and the fourth spacer element in the direction along the optical axis, CT3 is the central thickness of the third lens on the optical axis, and CT4 is the central thickness of the fourth lens on the optical axis. The requirements that D4s/EP34+ CT4/CT3 is more than 3.5 and less than 13.5 are met, the thickness ratio of the third lens to the fourth lens is favorably reduced, the lens forming is favorably realized, the performance of shielding stray light of each spacing element is favorably improved, and the imaging quality of the lens is better.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 1.0 < (TD-T34)/(∑ EP- Σ CP) < 42.5, where TD is an interval distance on the optical axis from the object side surface of the first lens to the image side surface of the fifth lens, T34 is an air interval on the optical axis between the third lens and the fourth lens, Σ EP is a sum total of interval distances in a direction along the optical axis between any adjacent two of the first to fourth spacing elements, and Σ CP is a sum total of maximum thicknesses of the respective spacing elements in the first to fourth spacing elements. More specifically, TD, T34, Σ EP, and Σ CP may further satisfy: 1.0 < (TD-T34)/(. Sigma.EP-. Sigma.CP) < 10. Satisfy 1.0 < (TD-T34)/(∑ EP- Σ CP) < 42.5, can rationally distribute the thickness of each spacer element and the spacing distance between each spacer element, so as to effectively utilize spacer element to adjust the curvature of field, improve the lens performance.
In an exemplary embodiment, an optical imaging lens according to the present application may satisfy: 14.4mm -1 ＜(V3+V4)/(D4s-d3m)＜36.5mm -1 Where V3 is the abbe number of the third lens, V4 is the abbe number of the fourth lens, D4s is the outer diameter of the object-side surface of the fourth spacer element, and D3m is the inner diameter of the image-side surface of the third spacer element. Satisfies 14.4mm -1 ＜(V3+V4)/(D4s-d3m)＜36.5mm -1 The lens materials of the third lens and the fourth lens and the sizes of the third spacing element and the fourth spacing element can be reasonably set, so that light rays can better penetrate through the lens materials, and the influence of stray light on imaging quality is reduced.
In an exemplary embodiment, an optical imaging lens according to the present application further includes a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on an imaging surface. The application provides an optical imaging lens with the characteristics of good assembly stability, small stray light, long focus, large image plane, high imaging quality and the like. The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, the above five lenses. By reasonably distributing the focal power, the surface type, the material, the central thickness of each lens, the on-axis distance between each lens and the like of each lens, incident light can be effectively converged, the optical total length of the imaging lens is reduced, the machinability of the imaging lens is improved, and the optical imaging lens is more beneficial to production and processing.
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 object-side surface of the first lens to the image-side surface of the fifth lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens is an aspheric mirror surface. Optionally, each of the first, second, third, fourth, and fifth lenses has an object-side surface and an image-side surface that are aspheric mirror surfaces.
However, it will be appreciated by those skilled in the art that the number of lenses constituting the optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed technical solutions. For example, although five lenses are exemplified in the embodiment, the optical imaging lens is not limited to include five lenses. The optical imaging lens may also include other numbers of lenses, if desired. At least one spacer can be arranged between any two adjacent lenses.
Specific examples of an optical imaging lens applicable to the above-described embodiments are further described below with reference to the drawings.
Example 1
An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1A to 2D. Fig. 1A and 1B respectively show structural schematic diagrams of a lens barrel, a lens group, and each spacer element in two embodiments in the optical imaging lens of example 1.
As shown in fig. 1A and fig. 1B, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter (not shown), and an image plane (not shown).
The first lens element E1 has positive refractive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has a negative refractive power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive refractive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has a negative refractive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has a negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The filter has an object side surface S11 and an image side surface S12. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging plane S13.
Table 1 shows a basic parameter table of the optical imaging lens of embodiment 1, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).
TABLE 1
As shown in fig. 1A and 1B, the optical imaging lens may include a barrel P0 accommodating first to fifth lenses and six spacer elements respectively located between the first to fifth lenses. The six spacing elements are a first spacing element P1, a second spacing element P2, first auxiliary spacing elements P2b and P2c, a third spacing element P3 and a fourth spacing element P4, respectively.
Table 2 shows a basic parameter table of the lens barrel and each spacer element in two embodiments in the optical imaging lens of example 1, in which the unit of each parameter in table 2 is millimeter (mm).
TABLE 2
It should be understood that in this example, the structures and parameters of the lens barrel and each spacing element in the two embodiments are merely exemplified, and the specific structures and actual parameters of the lens barrel and each spacing element are not explicitly defined. The specific construction and actual parameters of the barrel and the respective spacer elements may be set in any suitable manner in the actual production.
In the present example, the total effective focal length f of the optical imaging lens is 6.83mm, the half Semi-FOV of the maximum field angle of the optical imaging lens is 23.27 °, and the aperture value FNO of the optical imaging lens is 2.98.
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 to the fifth lens E5 are aspheric, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric formula:
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c =1/R (i.e., paraxial curvature c is the reciprocal of the radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 3 below gives the coefficients A of the higher order terms which can be used for the aspherical mirror surfaces S1 to S10 in example 1 4 、A 6 、A 8 、A 10 、A 12 、A 14 And A 16 。
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -1.76E-02 | -7.54E-03 | 5.67E-03 | -1.39E-02 | 9.86E-03 | -3.12E-03 | 0.00E+00 |
| S2 | -3.48E-02 | 4.09E-02 | -2.14E-02 | 7.36E-03 | 3.43E-04 | -7.01E-04 | 0.00E+00 |
| S3 | -5.99E-02 | 1.10E-01 | -9.34E-02 | 4.65E-02 | -1.27E-02 | 1.71E-04 | 0.00E+00 |
| S4 | -3.46E-02 | 7.22E-02 | -6.97E-02 | 2.49E-02 | -1.94E-03 | -2.03E-03 | 0.00E+00 |
| S5 | -7.50E-02 | 9.87E-02 | -1.98E-01 | 2.42E-01 | -1.61E-01 | 3.99E-02 | 0.00E+00 |
| S6 | -7.16E-02 | 1.29E-01 | -1.56E-01 | 1.53E-01 | -8.40E-02 | 2.03E-02 | 0.00E+00 |
| S7 | -1.03E-01 | 6.55E-02 | -2.84E-02 | 4.61E-04 | 4.74E-03 | -9.37E-04 | 0.00E+00 |
| S8 | -7.91E-03 | -2.92E-02 | 2.87E-02 | -1.23E-02 | 2.39E-03 | -1.63E-04 | 0.00E+00 |
| S9 | 8.05E-02 | -1.21E-01 | 8.28E-02 | -2.87E-02 | 4.81E-03 | -3.08E-04 | 0.00E+00 |
| S10 | -7.57E-03 | -1.12E-02 | 5.44E-03 | -1.08E-03 | 9.33E-05 | -2.94E-06 | 0.00E+00 |
TABLE 3
Fig. 2A shows on-axis chromatic aberration curves of the optical imaging lens of embodiment 1, which represent the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 1. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different angles of view. Fig. 2D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 1, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens according to embodiment 1 can achieve good imaging quality.
Example 2
An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3A to 4D. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 3A and 3B show schematic structural views of the lens barrel, the lens group, and each of the spacing elements in two embodiments in the optical imaging lens of example 2, respectively.
As shown in fig. 3A and fig. 3B, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter (not shown), and an image plane (not shown).
The first lens element E1 has positive refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and the object-side surface S3 is convex and the image-side surface S4 is concave. The third lens element E3 has a negative refractive power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has a negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The filter has an object side surface S11 and an image side surface S12. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging plane S13.
As shown in fig. 3A and 3B, the optical imaging lens may include a barrel P0 accommodating first to fifth lenses and six spacer elements respectively located between the first to fifth lenses. The six spacing elements are a first spacing element P1, a second spacing element P2, first auxiliary spacing elements P2b and P2c, a third spacing element P3 and a fourth spacing element P4, respectively.
It should be understood that in this example, the structures and parameters of the lens barrel and each spacing element in the two embodiments are merely exemplified, and the specific structures and actual parameters of the lens barrel and each spacing element are not explicitly defined. The specific construction and actual parameters of the barrel and the respective spacer elements may be set in any suitable manner in the actual production.
In the present example, the total effective focal length f of the optical imaging lens is 6.09mm, the Semi-FOV of the maximum field angle of the optical imaging lens is 25.71 °, and the aperture value FNO of the optical imaging lens is 2.89.
Table 4 shows a basic parameter table of the optical imaging lens of embodiment 2, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 5 shows a basic parameter table of the lens barrel and each spacer element in two embodiments in the optical imaging lens of example 2, in which the unit of each parameter in table 5 is millimeter (mm). Table 6 shows high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 4
| Structural | Embodiment mode | 1 | |
| d1s | 1.926 | 1.926 | |
| d1m | 1.926 | 1.926 | |
| D2m | 3.600 | 3.200 | |
| d3m | 3.120 | 3.120 | |
| D3m | 4.491 | 4.791 | |
| D4s | 4.900 | 5.200 | |
| D4m | 4.900 | 5.200 | |
| D0s | 4.892 | 3.632 | |
| EP01 | 0.769 | 0.769 | |
| EP34 | 0.477 | 0.477 | |
| ∑CP | 1.027 | 1.027 | |
| ∑EP | 1.936 | 1.936 | |
| EPmax | 0.960 | 0.960 |
TABLE 5
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -1.76E-02 | -1.94E-02 | 3.88E-02 | -7.81E-02 | 6.79E-02 | -2.47E-02 | 0.00E+00 |
| S2 | -7.35E-02 | 1.22E-01 | -7.60E-02 | 3.68E-02 | -2.40E-02 | 2.65E-03 | 0.00E+00 |
| S3 | -9.39E-02 | 2.34E-01 | -1.72E-01 | 5.43E-02 | -3.02E-02 | 6.91E-03 | 0.00E+00 |
| S4 | -2.39E-02 | 1.22E-01 | 8.38E-02 | -4.76E-01 | 5.74E-01 | -3.02E-01 | 0.00E+00 |
| S5 | 1.35E-02 | 8.06E-02 | -6.16E-02 | 1.71E-02 | -6.13E-03 | -8.03E-03 | 0.00E+00 |
| S6 | 1.55E-02 | 4.28E-02 | -3.14E-03 | -5.55E-02 | 6.12E-02 | -3.17E-02 | 0.00E+00 |
| S7 | -3.83E-02 | 1.10E-02 | -1.34E-02 | 4.11E-03 | -5.16E-04 | 6.11E-05 | 0.00E+00 |
| S8 | -2.24E-02 | 1.00E-02 | -8.26E-03 | 2.23E-03 | -3.43E-04 | 3.89E-05 | 0.00E+00 |
| S9 | -3.68E-02 | 1.94E-02 | -1.42E-03 | -1.16E-03 | 3.19E-04 | -2.37E-05 | 0.00E+00 |
| S10 | -4.07E-02 | 1.18E-02 | -2.53E-03 | 5.40E-04 | -9.79E-05 | 7.17E-06 | 0.00E+00 |
TABLE 6
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 2. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different angles of view. Fig. 4D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens according to embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5A to 6D. Fig. 5A and 5B show schematic structural views of the lens barrel, the lens group, and each of the spacing elements in two embodiments in the optical imaging lens of example 3, respectively.
As shown in fig. 5A and 5B, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter (not shown), and an image plane (not shown).
The first lens element E1 has positive refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and the object-side surface S3 is convex and the image-side surface S4 is concave. The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has a negative refractive power, and has a concave object-side surface S9 and a convex image-side surface S10. The filter has an object side surface S11 and an image side surface S12. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging plane S13.
As shown in fig. 5A and 5B, the optical imaging lens may include a barrel P0 accommodating first to fifth lenses and four spacer elements respectively located between the first to fifth lenses. The four spacing elements are a first spacing element P1, a second spacing element P2, a third spacing element P3 and a fourth spacing element P4, respectively.
It should be understood that in this example, the structures and parameters of the lens barrel and each spacing element in the two embodiments are merely exemplified, and the specific structures and actual parameters of the lens barrel and each spacing element are not explicitly defined. The specific construction and actual parameters of the barrel and the respective spacer elements may be set in any suitable manner in the actual production.
In the present example, the total effective focal length f of the optical imaging lens is 5.45mm, the Semi-FOV of the maximum field angle of the optical imaging lens is 30.25 °, and the aperture value FNO of the optical imaging lens is 2.90.
Table 7 shows a basic parameter table of the optical imaging lens of embodiment 3, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm). Table 8 shows a basic parameter table of the lens barrel and each spacer element in two embodiments in the optical imaging lens of example 3, in which the unit of each parameter in table 8 is millimeter (mm). Tables 9-1, 9-2 show the coefficients of high-order terms that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
TABLE 7
| Structural | Embodiment mode | 1 | |
| d1s | 1.759 | 1.759 | |
| d1m | 1.759 | 1.759 | |
| D2m | 2.900 | 3.400 | |
| d3m | 3.422 | 3.420 | |
| D3m | 4.292 | 4.691 | |
| D4s | 5.600 | 5.600 | |
| D4m | 5.600 | 5.600 | |
| D0s | 3.878 | 4.899 | |
| EP01 | 0.647 | 0.647 | |
| EP34 | 0.539 | 0.539 | |
| ∑CP | 1.352 | 1.352 | |
| ∑EP | 1.429 | 1.429 | |
| EPmax | 0.539 | 0.539 |
TABLE 8
TABLE 9-1
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | -3.84E+01 | 3.78E+01 | -2.02E+01 | 4.54E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S2 | 4.14E+02 | -5.92E+02 | 5.33E+02 | -2.73E+02 | 6.05E+01 | 0.00E+00 | 0.00E+00 |
| S3 | 1.43E+01 | -3.63E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S4 | -1.26E+03 | 1.29E+03 | -7.62E+02 | 1.97E+02 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S5 | 3.40E+01 | -1.03E+01 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S6 | -5.96E-01 | 1.21E-01 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S7 | 7.74E-03 | -1.19E-03 | 7.52E-05 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S8 | 1.15E-02 | -2.01E-03 | 1.98E-04 | -8.42E-06 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S9 | -1.48E-01 | 4.38E-02 | -8.62E-03 | 1.08E-03 | -7.80E-05 | 2.45E-06 | 0.00E+00 |
| S10 | -3.30E-04 | 3.19E-05 | -2.35E-06 | 1.18E-07 | -2.91E-09 | 0.00E+00 | 0.00E+00 |
TABLE 9-2
Fig. 6A shows on-axis chromatic aberration curves of the optical imaging lens of embodiment 3, which represent the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 3. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different angles of view. Fig. 6D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 3, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens according to embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7A to 8D. Fig. 7A and 7B show schematic structural views of the lens barrel, the lens group, and each of the spacing elements in two embodiments in the optical imaging lens of example 4, respectively.
As shown in fig. 7A and fig. 7B, the optical imaging lens includes, in order from an object side to an image side: a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter (not shown), and an imaging surface (not shown).
The first lens element E1 has positive refractive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and the object-side surface S3 is convex and the image-side surface S4 is concave. The third lens element E3 has positive refractive power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has a negative refractive power, and has a convex object-side surface S7 and a concave image-side surface S8. The fifth lens element E5 has positive power, and has a concave object-side surface S9 and a convex image-side surface S10. The filter has an object side surface S11 and an image side surface S12. The light from the object passes through the respective surfaces S1 to S12 in order and is finally imaged on the imaging plane S13.
As shown in fig. 5A and 5B, the optical imaging lens may include a barrel P0 accommodating first to fifth lenses and five spacer elements respectively located between the first to fifth lenses. The five spacing elements are a first spacing element P1, a second spacing element P2, a third spacing element P3, a second auxiliary spacing element P3b and a fourth spacing element P4, respectively.
It should be understood that in this example, the structures and parameters of the lens barrel and each spacing element in the two embodiments are merely exemplified, and the specific structures and actual parameters of the lens barrel and each spacing element are not explicitly defined. The specific construction and actual parameters of the barrel and the respective spacer elements may be set in any suitable manner during actual production.
In the present example, the total effective focal length f of the optical imaging lens is 6.37mm, the Semi-FOV of the maximum field angle of the optical imaging lens is 26.36 °, and the aperture value FNO of the optical imaging lens is 2.90.
Table 10 shows a basic parameter table of the optical imaging lens of embodiment 4, in which the units of the radius of curvature, the thickness/distance, and the focal length are millimeters (mm). Table 11 shows a basic parameter table of the lens barrel and each spacer element in two embodiments in the optical imaging lens of example 4, in which the unit of each parameter in table 11 is millimeter (mm). Tables 12-1, 12-2 show the high-order term coefficients that can be used for each aspherical mirror surface in example 4, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
TABLE 11
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 2.45E-02 | 6.58E-03 | 9.03E-03 | -4.61E-02 | 9.23E-02 | -1.15E-01 | 8.73E-02 |
| S2 | -5.62E-02 | -9.84E-03 | 5.01E-01 | -1.39E+00 | 2.34E+00 | -2.72E+00 | 1.96E+00 |
| S3 | -1.98E-01 | 3.50E-01 | -1.43E-02 | -4.62E-01 | 5.47E-01 | -1.09E-01 | -4.26E-01 |
| S4 | -1.35E-01 | 2.03E-01 | 9.43E-02 | -3.75E-01 | -1.67E+00 | 8.35E+00 | -1.55E+01 |
| S5 | -8.55E-02 | 1.94E-02 | 1.98E-01 | -6.91E-01 | 1.26E+00 | -1.35E+00 | 7.74E-01 |
| S6 | -4.24E-02 | -1.99E-02 | 2.84E-01 | -1.07E+00 | 2.42E+00 | -3.37E+00 | 2.83E+00 |
| S7 | -5.35E-02 | 6.25E-03 | -2.07E-02 | 6.84E-02 | -1.15E-01 | 1.05E-01 | -5.49E-02 |
| S8 | 2.30E-02 | -9.64E-02 | 8.76E-02 | -5.24E-02 | 2.18E-02 | -6.21E-03 | 1.13E-03 |
| S9 | 1.15E-01 | -1.58E-01 | 8.95E-02 | -2.51E-02 | 3.06E-03 | 6.65E-05 | -5.36E-05 |
| S10 | 8.49E-02 | -9.30E-02 | 4.20E-02 | -9.92E-03 | 1.27E-03 | -6.88E-05 | -3.02E-06 |
TABLE 12-1
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | -3.98E-02 | 7.88E-03 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S2 | -7.56E-01 | 1.19E-01 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S3 | 4.59E-01 | -1.46E-01 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S4 | 1.38E+01 | -4.96E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S5 | -1.43E-01 | -2.06E-02 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S6 | -1.31E+00 | 2.56E-01 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S7 | 1.53E-02 | -1.76E-03 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S8 | -1.18E-04 | 5.29E-06 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S9 | 3.89E-06 | -1.85E-08 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S10 | 6.30E-07 | -2.62E-08 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
TABLE 12-2
Fig. 8A shows on-axis chromatic aberration curves of the optical imaging lens of embodiment 4, which represent the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 4. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different angles of view. Fig. 8D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens according to embodiment 3 can achieve good imaging quality.
In summary, examples 1 to 4 satisfy the relationships shown in tables 13-1 and 13-2, respectively.
TABLE 13-1
TABLE 13-2
The present application also provides an imaging device whose electron photosensitive element may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.
The foregoing description is only exemplary of the preferred embodiments of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (16)
1. An optical imaging lens, comprising:
a lens group including, in order from an object side to an image side along an optical axis, a first lens having positive power, a second lens having negative power, a third lens, a fourth lens, and a fifth lens having positive power;
a plurality of spacer elements including a third spacer element positioned between the third lens and the fourth lens and in contact with an image-side surface portion of the third lens and a fourth spacer element positioned between the fourth lens and the fifth lens and in contact with an image-side surface portion of the fourth lens; and
a lens barrel for accommodating the lens group and the plurality of spacing elements,
wherein, the optical imaging lens satisfies: 5.0 < | (R7 + R5)/(D4 m-D3 m) | < 31.5, wherein R5 is a radius of curvature of an object-side surface of the third lens, R7 is a radius of curvature of an object-side surface of the fourth lens, D3m is an outer diameter of an image-side surface of the third spacing element, and D4m is an outer diameter of an image-side surface of the fourth spacing element.
2. The optical imaging lens according to claim 1, characterized in that the optical imaging lens satisfies: 2mm 2 ＜R1×R4＜19.5mm 2 Wherein R1 is a radius of curvature of an object-side surface of the first lens, and R4 is a radius of curvature of an image-side surface of the second lens.
3. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies: -5.0 < f3/f5 < 4.0, wherein f3 is the effective focal length of the third lens and f5 is the effective focal length of the fifth lens.
4. The optical imaging lens of claim 1, wherein the plurality of spacing elements further comprise:
a second spacer element positioned between the second lens and the third lens and in contact with an image-side surface portion of the second lens;
n first auxiliary spacing elements between the second spacing element and the third lens; and
and F second auxiliary spacing elements positioned between the third spacing element and the fourth lens, wherein N + F is greater than or equal to 0 and less than 4.
5. The optical imaging lens of claim 4, wherein the plurality of spacing elements further comprises: a first spacer element positioned between the first lens and the second lens and in contact with an image-side surface portion of the first lens,
the optical imaging lens satisfies the following conditions: 4.5 < (D4 m-D1 m)/(T45-T12) < 18.5, wherein D1m is an inner diameter of an image side surface of the first spacing element, T45 is an air space of the fourth lens and the fifth lens on the optical axis, and T12 is an air space of the first lens and the second lens on the optical axis.
6. The optical imaging lens of claim 5, wherein the optical imaging lens satisfies: 1.0 < (R4 + R1)/(D2 m-D1 s) < 25.2, wherein R1 is the radius of curvature of the object-side surface of the first lens, R4 is the radius of curvature of the image-side surface of the second lens, D2m is the outer diameter of the image-side surface of the second spacer element, and D1s is the inner diameter of the object-side surface of the first spacer element.
7. The optical imaging lens of claim 5, wherein the optical imaging lens satisfies: 1.5 < (D2 m-D1 m)/T12 < 30.0, wherein D2m is an outer diameter of an image-side surface of the second spacer element, D1m is an inner diameter of an image-side surface of the first spacer element, and T12 is an air space of the first lens and the second lens on the optical axis.
8. The optical imaging lens according to claim 4, wherein the optical imaging lens satisfies: 2.5 < (D3 m + D2 m)/(CT 3+ T34) < 11.7, wherein D2m is an outer diameter of an image side surface of the second spacing element, CT3 is a center thickness of the third lens on the optical axis, and T34 is an air space of the third lens and the fourth lens on the optical axis.
9. The optical imaging lens according to claim 5, wherein the optical imaging lens satisfies: 4.5 < D0s/∑ CT + TD/EPmax < 12.0, wherein D0s is an outer diameter of an object-side end of the lens barrel, Σ CT is a sum of central thicknesses of all of the first lens to the fifth lens on the optical axis, TD is a distance of a separation of an object-side surface of the first lens to an image-side surface of the fifth lens on the optical axis, and EPmax is a maximum value of a distance of a separation of any two adjacent ones of the first spacer to the fourth spacer in a direction along the optical axis.
10. The optical imaging lens according to claim 5, wherein the optical imaging lens satisfies: 3.5 < f/TD + D0 s/Sigma CP < 85.0, wherein f is the total effective focal length of the optical imaging lens, TD is the spacing distance between the object side surface of the first lens and the image side surface of the fifth lens on the optical axis, D0s is the outer diameter of the object side end of the lens barrel, and Sigma CP is the sum of the maximum thicknesses of the spacing elements in the first spacing element to the fourth spacing element.
11. The optical imaging lens according to claim 5, wherein the optical imaging lens satisfies: -2.5 < (f 1+ f 3)/(D3 m-D1 s) < 30.5, wherein f1 is the effective focal length of the first lens, f3 is the effective focal length of the third lens, and D1s is the inner diameter of the object side face of the first spacer element.
12. The optical imaging lens according to claim 5, wherein the optical imaging lens satisfies: 5.0 < D0s/EP01 +. SIGMA CT/CT4 < 13.0, wherein D0s is the outer diameter of the object side end of the lens barrel, EP01 is the distance between the object side end of the lens barrel and the object side surface of the first spacing element along the optical axis, SIGMA CT is the sum of the central thicknesses of all the first lens to the fifth lens along the optical axis, and CT4 is the central thickness of the fourth lens along the optical axis.
13. The optical imaging lens according to claim 1, characterized in that the optical imaging lens satisfies: 2.5 < | f 45/(D4 s-D3 m) | < 13.5, wherein f45 is the combined focal length of the fourth and fifth lenses, D4s is the outer diameter of the object-side surface of the fourth spacer element, and D3m is the inner diameter of the image-side surface of the third spacer element.
14. The optical imaging lens of claim 1, wherein the optical imaging lens satisfies: 3.5 < D4s/EP34+ CT4/CT3 < 13.5, wherein D4s is an outer diameter of an object side surface of the fourth spacer element, EP34 is a spacing distance of the third spacer element and the fourth spacer element in a direction of the optical axis, CT3 is a center thickness of the third lens on the optical axis, and CT4 is a center thickness of the fourth lens on the optical axis.
15. The optical imaging lens according to claim 5, wherein the optical imaging lens satisfies: 1.0 < (TD-T34)/(∑ EP- Σ CP) < 42.5, where TD is a separation distance on the optical axis from an object side surface of the first lens to an image side surface of the fifth lens, T34 is an air space on the optical axis of the third lens and the fourth lens, Σ EP is a sum total of separation distances in a direction along the optical axis of any adjacent two of the first to fourth spacing elements, and Σ CP is a sum total of maximum thicknesses of the respective spacing elements in the first to fourth spacing elements.
16. The optical imaging lens according to claim 1, characterized in that the optical imaging lens satisfies: 14.4mm -1 ＜(V3+V4)/(D4s-d3m)＜36.5mm -1 Wherein V3 is the abbe number of the third lens, V4 is the abbe number of the fourth lens, D4s is the outer diameter of the object-side surface of the fourth spacer element, and D3m is the inner diameter of the image-side surface of the third spacer element.
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